Hygienic Process Valves

Hygienic Single Seat Valves

Hygienic single seat valves provide reliable shut-off, flow routing and controlled product handling in dairy, beverage, food, pharmaceutical and other sanitary processing systems. The range includes compact SSSV models, pneumatic Unique SSV configurations, manual valves, maintainable actuators and aseptic executions.

View OEM Part Numbers Operating Principle Models & Configurations

Pneumatic actuator Valve stem Hygienic valve body

What Is a Single Seat Valve?

A single seat valve controls or isolates a hygienic process stream by moving one valve plug against one sealing seat.

Hygienic shut-off and routing

The valve plug is moved by a pneumatic actuator or manual mechanism. In the closed position, the plug seal contacts the valve seat and separates the connected process paths. When actuated, the plug moves away from the seat and allows product, water or CIP solution to pass.

Two-port shut-off configurations
Three-port routing and change-over configurations
Normally closed and normally open operation
Manual and pneumatic actuation

Sanitary construction

Unique SSV valve bodies are designed for hygienic processing, cleanability and reduced product retention. Selection depends on valve configuration, nominal line size, connection standard, elastomer compatibility and automation requirements.

Product-contact components in 1.4404 / AISI 316L
Welding-end, DIN and welding/SMS options
EPDM and selected alternative sealing arrangements
Compatible with indication and control equipment

Material 1.4404 / AISI 316L

Standard SSV Finish Internal Ra ≤ 0.8 μm

SSSV Finish Internal Ra ≤ 0.5 μm

Functions Shut-off / change-over

Operating Principle

The actuator converts pneumatic air pressure into linear stem movement, lifting or lowering the plug relative to the valve seat.

Closed Position

The plug is pressed against the valve seat. The sealing element blocks product flow between the connected ports.

Open Position

Control air moves the actuator and stem. The plug lifts away from the seat, creating an open hygienic flow path.

Valve Construction & Main Components

The exact internal arrangement differs between SSV 200, 210, 220, 300 and aseptic configurations, but the main functional components remain comparable.

Single Seat Valve — Simplified Sectional Schematic

Original explanatory schematic prepared for LGN. It is intended for component identification and does not replace a certified dimensional drawing.

1 — Actuator: Produces the linear operating force.

2 — Stem: Transfers actuator movement to the valve plug.

3 — Bonnet: Connects the actuator assembly to the product body.

4 — Clamp: Provides a removable hygienic mechanical connection.

5 — Valve body: Forms the sanitary product-flow geometry.

6 — Plug: Opens or closes the flow path.

7 — Seat seal: Creates the process shut-off seal.

8 — Process connection: Welding, DIN or welding/SMS depending on execution.

Key Engineering Benefits

Designed to combine hygienic product handling, repeatable operation and service-friendly construction.

Hygienic cleanability

Smooth product-contact geometry supports efficient CIP cleaning and minimizes areas where product residues may collect.

CIP Low retention

Reliable shut-off

The single sealing seat provides a clear, mechanically simple shut-off principle for sanitary processing duties.

Seat seal Product isolation

Multiple body configurations

SSV 200, 210, 220 and 300 arrangements support different flow directions, ports and piping layouts.

2-port 3-port

Flexible actuation

Select normally closed, normally open, manual, manual-regulating or maintainable-actuator configurations.

NC NO Manual

Connection compatibility

Available product listings cover hygienic welding ends, DIN dimensions and welding/SMS connections.

Welding DIN SMS

Aseptic executions

Dedicated aseptic NC versions use an atmosphere-side diaphragm concept and PTFE/EPDM sealing arrangements.

Aseptic PTFE / EPDM

Unique Single Seat Valve Families

The model number identifies the body and port configuration, while NC, NO, connection and actuator references define the execution.

SSSV 20 / 21

Small Single Seat Valves

Compact sanitary valves for small product and utility lines.

12.7 mm and 19 mm variants
Two- and three-port configurations
Compact pneumatic actuator
EPDM and selected FPM options

SSV 200

Straight-Through Configuration

Common single-seat shut-off body arrangement for hygienic product lines.

NC and NO operation
Manual and regulating variants
Inch and DIN sizes
Aseptic versions available

SSV 300

Alternative Body Orientation

Single-seat configuration offering an alternative body and installation orientation.

NC and NO operation
Manual versions
Maintainable actuator option
Aseptic versions available

SSV 210

Three-Port Configuration

Multi-port body arrangement used for routing and change-over functions in hygienic piping.

NC and NO versions
Inch, DIN and SMS references
Maintainable actuator option
Multiple nominal sizes

SSV 220

Alternative Three-Port Geometry

Three-port single-seat body configuration for different piping and preferred flow-direction requirements.

NC and NO versions
Inch, DIN and SMS references
Maintainable actuator option
EPDM standard listings

ASEPTIC SSV

Aseptic Single Seat Valve

Developed for sensitive hygienic duties requiring hermetic atmosphere-side protection.

Normally closed operation
SSV 200 and 300 bodies
Inch and DIN listings
PTFE/EPDM sealing concept

How to Read the Valve Denomination

The denomination communicates the family, connection, size, body configuration, actuation logic and seal material.

Unique-SSV-W-51-210-NC-EPDM

Unique SSV Unique Single Seat Valve family

W Welding-end connection

51 Nominal outside-diameter reference

210 Valve body/configuration code

NC Normally closed actuator logic

EPDM Listed elastomer/seal material

Unique-SSV-W/DN50-300-NO-EPDM

Unique SSV Unique Single Seat Valve family

W/DN50 Welding end with DIN nominal size reference

300 Valve body/configuration code

NO Normally open actuator logic

EPDM Listed elastomer/seal material

Complete Part Numbers

Browse the available valve groups by operating mode, body configuration, connection standard and actuator execution.

OEM Reference Database

Each table in the following sections includes the matching schematic, valve description, denomination, principal dimensional references and Tetra Pak part number. Select the nearest category below to jump directly to the required group.

Part numbers and dimensional references must be reconfirmed against the latest manufacturer data when placing an order.

SSSV Small Single Seat Valves

Compact normally closed hygienic valves designed for small process, utility, dosing and sampling lines.

SSSV 20 — Normally Closed

Compact two-port Small Single Seat Valve with hygienic welding ends. The available versions differ by nominal diameter and actuator fastening arrangement.

Normally Closed Two-Port Welding Ends EPDM 12.7 / 19.0 mm

Model	Denomination	A	E1	E2	C	Tetra Pak Part No.
SSSV 20	SSSV-W-12.7-NC-CI/Hex nut EPDM	172.2	29.8	45	—	6-9612 94 6202
SSSV 20	SSSV-W-12.7-NC-CI/Wing nut EPDM	172.2	29.8	45	—	6-9612 94 7002
SSSV 20	SSSV-W-19.0-NC-CI/Hex nut EPDM	171.2	29.8	45	—	6-9612 94 6226
SSSV 20	SSSV-W-19.0-NC-CI/Wing nut EPDM	171.2	29.8	45	—	6-9612 94 7026

Dimensions are shown in millimetres. Confirm valve denomination, actuator fastening and current OEM availability before ordering.

SSSV 21 — Normally Closed, Three-Port

Compact three-port Small Single Seat Valve for hygienic routing and change-over duties. The documented variants include EPDM and FPM sealing materials.

Normally Closed Three-Port Welding Ends EPDM / FPM 12.7 mm

Model	Denomination	A	E1	E2	C	Tetra Pak Part No.
SSSV 21	SSSV-W-12.7-NC-CI/Hex nut EPDM	200.2	29.8	45.0	32.3	6-9612 94 6210
SSSV 21	SSSV-W-12.7-NC-CI/Hex nut FPM	200.2	29.8	45.0	32.3	6-9612 94 6307

The model schematic corresponds to the three-port SSSV 21 valve family. Seal material must be selected according to the process medium, CIP chemistry and operating temperature.

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Manual Single Seat Valves — Inch

Hygienic SSV 200 and SSV 300 valves for local manual operation where pneumatic actuation and automatic control are not required.

SSV 200 — Manual Operation

Straight-through manual single seat valve for hygienic local shut-off. The hand-operated mechanism moves the plug relative to the valve seat without pneumatic air.

Manual SSV 200 Welding Ends EPDM 25–101.4 mm

Model	Denomination	E	Tetra Pak Part No.
SSV 200 Manual	Unique-SSV-W-25-200-Man-EPDM	50.0	6-9613 36 0312
SSV 200 Manual	Unique-SSV-W-38-200-Man-EPDM	49.5	6-9613 36 0313
SSV 200 Manual	Unique-SSV-W-51-200-Man-EPDM	62.0	6-9613 36 0314
SSV 200 Manual	Unique-SSV-W-63.5-200-Man-EPDM	82.0	6-9613 36 0315
SSV 200 Manual	Unique-SSV-W-76.1-200-Man-EPDM	87.0	6-9613 36 0316
SSV 200 Manual	Unique-SSV-W-101.4-200-Man-EPDM	120.0	6-9613 36 0317

SSV 300 — Manual Operation

Manual SSV 300 valve with an alternative body and plug orientation. It is suitable for local hygienic shut-off duties where automatic actuation is unnecessary.

Manual SSV 300 Welding Ends EPDM 25–101.4 mm

Model	Denomination	E	Tetra Pak Part No.
SSV 300 Manual	Unique-SSV-W-25-300-Man-EPDM	50.0	6-9613 36 0336
SSV 300 Manual	Unique-SSV-W-38-300-Man-EPDM	49.5	6-9613 36 0337
SSV 300 Manual	Unique-SSV-W-51-300-Man-EPDM	62.0	6-9613 36 0338
SSV 300 Manual	Unique-SSV-W-63.5-300-Man-EPDM	82.0	6-9613 36 0339
SSV 300 Manual	Unique-SSV-W-76.1-300-Man-EPDM	87.0	6-9613 36 0340
SSV 300 Manual	Unique-SSV-W-101.4-300-Man-EPDM	120.0	6-9613 36 0341

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SSV 200 Manual-Regulating Valves

Hand-operated regulating versions designed for local adjustment of hygienic process flow through an SSV 200 valve body.

SSV 200 — Manual Regulating, DIN

DIN-size manual-regulating valves with hygienic welding ends. The handwheel mechanism permits local adjustment of the plug position and therefore the effective flow opening.

Manual Regulating DIN Sizes SSV 200 Welding Ends EPDM

Model	Denomination	A	E	Tetra Pak Part No.
SSV 200 DIN	Unique-SSV-W-40-200-MAN-REG-EPDM	178	49.5	6-9613 36 1104
SSV 200 DIN	Unique-SSV-W-40-200-MAN-REG-EPDM	178	49.5	6-9613 36 1105
SSV 200 DIN	Unique-SSV-W-50-200-MAN-REG-EPDM	191	61	6-9613 36 1106
SSV 200 DIN	Unique-SSV-W-65-200-MAN-REG-EPDM	215	77	6-9613 32 7196
SSV 200 DIN	Unique-SSV-W-80-200-MAN-REG-EPDM	226	86	6-9613 36 1108
SSV 200 DIN	Unique-SSV-W-100-200-MAN-REG-EPDM	269	119	6-9613 36 1109

The source listing contains two DN40 entries with the same visible denomination but different Tetra Pak part numbers. A hidden option or configuration difference may exist; confirm it before ordering.

SSV 200 — Manual Regulating, Inch

Inch-size manual-regulating executions with sanitary welding ends and EPDM sealing. These models provide local mechanical adjustment without an automated control actuator.

Manual Regulating Inch Sizes SSV 200 Welding Ends EPDM

Model	Denomination	A	E	Tetra Pak Part No.
SSV 200 Inch	Unique-SSV-W-38-200-MAN-REG-EPDM	176	49.5	6-9613 32 0115
SSV 200 Inch	Unique-SSV-W-38-200-MAN-REG-EPDM	176	49.5	6-9613 32 0116
SSV 200 Inch	Unique-SSV-W-51-200-MAN-REG-EPDM	189	61	6-9613 32 0117
SSV 200 Inch	Unique-SSV-W-63.5-200-MAN-REG-EPDM	215	77	6-9613 32 0118
SSV 200 Inch	Unique-SSV-W-76.1-200-MAN-REG-EPDM	221	86	6-9613 32 0119
SSV 200 Inch	Unique-SSV-W-101.6-200-MAN-REG-EPDM	267	119	6-9613 32 0120

The source listing contains two 38 mm entries with the same visible denomination but different part numbers. Confirm the complete configuration details with the latest OEM record.

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Normally Open Single Seat Valves — Inch

Pneumatically actuated SSV 200, SSV 300, SSV 210 and SSV 220 configurations designed to remain open in the actuator’s normal spring position and close when control air is applied.

SSV 200 — Normally Open

Straight-through, pneumatically actuated single seat valve. In the normal spring position, the valve plug is lifted from the seat and product can pass through the valve body. Applying control air moves the actuator into the closed position.

Normally Open SSV 200 Two-Port Pneumatic Actuator Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-200-NO-EPDM	328	50.0	—	6-9613 36 0013
38 mm	Unique-SSV-W-38-200-NO-EPDM	334	49.5	—	6-9613 36 0014
51 mm	Unique-SSV-W-51-200-NO-EPDM	389	62.0	—	6-9613 36 0015
63.5 mm	Unique-SSV-W-63.5-200-NO-EPDM	415	82.0	—	6-9613 36 0016
76.1 mm	Unique-SSV-W-76.1-200-NO-EPDM	453	87.0	—	6-9613 36 0017
101.6 mm	Unique-SSV-W-101.6-200-NO-EPDM	498	120.0	—	6-9613 36 0018

SSV 300 — Normally Open

Normally open SSV 300 execution with an alternative valve plug and body orientation. It provides fail-open operation for hygienic process duties where uninterrupted flow is the desired spring-return condition.

Normally Open SSV 300 Two-Port Pneumatic Actuator Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-300-NO-EPDM	328	50.0	—	6-9613 36 0039
38 mm	Unique-SSV-W-38-300-NO-EPDM	334	49.5	—	6-9613 36 0040
51 mm	Unique-SSV-W-51-300-NO-EPDM	389	62.0	—	6-9613 36 0041
63.5 mm	Unique-SSV-W-63.5-300-NO-EPDM	415	82.0	—	6-9613 36 0042
76.1 mm	Unique-SSV-W-76.1-300-NO-EPDM	453	87.0	—	6-9613 36 0043
101.6 mm	Unique-SSV-W-101.6-300-NO-EPDM	498	120.0	—	6-9613 36 0044

SSV 210 — Normally Open, Three-Port

Three-port single seat valve for hygienic routing, diverting and change-over duties. The SSV 210 body arrangement combines two horizontal connections with a lower vertical port.

Normally Open SSV 210 Three-Port Routing Duty Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-210-NO-EPDM	372	50.0	47.8	6-9613 36 0065
38 mm	Unique-SSV-W-38-210-NO-EPDM	391	49.5	60.8	6-9613 36 0066
51 mm	Unique-SSV-W-51-210-NO-EPDM	456	62.0	73.8	6-9613 36 0067
63.5 mm	Unique-SSV-W-63.5-210-NO-EPDM	498	82.0	86.3	6-9613 36 0068
76.1 mm	Unique-SSV-W-76.1-210-NO-EPDM	549	82.0	86.3	6-9613 36 0069
101.6 mm	Unique-SSV-W-101.6-210-NO-EPDM	619	120.0	123.6	6-9613 36 0070

SSV 220 — Normally Open, Three-Port

Alternative three-port body and plug arrangement used for hygienic routing and change-over applications. The valve remains open in its spring-return condition.

Normally Open SSV 220 Three-Port Routing Duty Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-220-NO-EPDM	372	50.0	47.8	6-9613 36 0091
38 mm	Unique-SSV-W-38-220-NO-EPDM	391	49.5	60.8	6-9613 36 0092
51 mm	Unique-SSV-W-51-220-NO-EPDM	456	62.0	73.8	6-9613 36 0093
63.5 mm	Unique-SSV-W-63.5-220-NO-EPDM	498	82.0	86.3	6-9613 36 0094
76.1 mm	Unique-SSV-W-76.1-220-NO-EPDM	549	87.0	98.9	6-9613 36 0095
101.6 mm	Unique-SSV-W-101.6-220-NO-EPDM	619	120.0	123.6	6-9613 36 0096

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Normally Closed Single Seat Valves — Inch

Pneumatically actuated SSV 200, SSV 300, SSV 210 and SSV 220 configurations designed to remain closed in their normal spring-return condition and open when control air is applied.

SSV 200 — Normally Closed

Straight-through fail-closed valve. In the normal spring position, the plug is pressed against the hygienic seat, separating the upstream and downstream process lines. Compressed air lifts the plug and opens the flow path.

Normally Closed SSV 200 Two-Port Fail-Closed Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-200-NC-EPDM	313	50.0	—	6-9613 36 0000
38 mm	Unique-SSV-W-38-200-NC-EPDM	314	49.5	—	6-9613 36 0001
51 mm	Unique-SSV-W-51-200-NC-EPDM	364	62.0	—	6-9613 36 0002
63.5 mm	Unique-SSV-W-63.5-200-NC-EPDM	390	82.0	—	6-9613 36 0003
76.1 mm	Unique-SSV-W-76.1-200-NC-EPDM	423	87.0	—	6-9613 36 0004
101.6 mm	Unique-SSV-W-101.6-200-NC-EPDM	468	120.0	—	6-9613 36 0005

SSV 300 — Normally Closed

Normally closed SSV 300 version with an alternative plug orientation. The spring-return actuator keeps the process line closed in the absence of compressed air.

Normally Closed SSV 300 Two-Port Fail-Closed Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-300-NC-EPDM	313	50.0	—	6-9613 36 0026
38 mm	Unique-SSV-W-38-300-NC-EPDM	314	49.5	—	6-9613 36 0027
51 mm	Unique-SSV-W-51-300-NC-EPDM	364	62.0	—	6-9613 36 0028
63.5 mm	Unique-SSV-W-63.5-300-NC-EPDM	390	82.0	—	6-9613 36 0029
76.1 mm	Unique-SSV-W-76.1-300-NC-EPDM	423	87.0	—	6-9613 36 0030
101.6 mm	Unique-SSV-W-101.6-300-NC-EPDM	468	120.0	—	6-9613 36 0031

SSV 210 — Normally Closed, Three-Port

Fail-closed three-port routing valve. The valve body supports hygienic flow diversion or line change-over while the actuator maintains the designated seat in its closed spring position.

Normally Closed SSV 210 Three-Port Fail-Closed Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-210-NC-EPDM	360	50.0	47.8	6-9613 36 0052
38 mm	Unique-SSV-W-38-210-NC-EPDM	374	49.5	60.8	6-9613 36 0053
51 mm	Unique-SSV-W-51-210-NC-EPDM	437	62.0	73.8	6-9613 36 0054
63.5 mm	Unique-SSV-W-63.5-210-NC-EPDM	476	82.0	86.3	6-9613 36 0055
76.1 mm	Unique-SSV-W-76.1-210-NC-EPDM	522	87.0	98.9	6-9613 36 0056
101.6 mm	Unique-SSV-W-101.6-210-NC-EPDM	592	120.0	123.6	6-9613 36 0057

SSV 220 — Normally Closed, Three-Port

Alternative fail-closed three-port execution for hygienic diverting and routing duties. The internal plug orientation differentiates the SSV 220 from the SSV 210 arrangement.

Normally Closed SSV 220 Three-Port Fail-Closed Welding Ends EPDM

Size	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-220-NC-EPDM	360	50.0	47.8	6-9613 36 0078
38 mm	Unique-SSV-W-38-220-NC-EPDM	374	49.5	60.8	6-9613 36 0079
51 mm	Unique-SSV-W-51-220-NC-EPDM	437	62.0	73.8	6-9613 36 0080
63.5 mm	Unique-SSV-W-63.5-220-NC-EPDM	476	82.0	86.3	6-9613 36 0081
76.1 mm	Unique-SSV-W-76.1-220-NC-EPDM	522	87.0	98.9	6-9613 36 0082
101.6 mm	Unique-SSV-W-101.6-220-NC-EPDM	592	120.0	123.6	6-9613 36 0083

Dimensions are presented in millimetres. Valve size, body configuration, actuator function, sealing material and current OEM part-number status should be verified before quotation or purchase.

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Normally Open Single Seat Valves — Maintainable Actuator

Hygienic pneumatically operated single seat valves equipped with serviceable maintainable actuators. These versions remain open in the normal spring-return position and close when pneumatic pressure is applied.

SSV 200 — Normally Open, Maintainable Actuator

Two-port hygienic shut-off valve with welding ends, EPDM product seals and a maintainable pneumatic actuator. The serviceable actuator construction supports inspection and component replacement during scheduled maintenance.

Normally Open SSV 200 Two-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique SSV-W-25-200-NO-EPDM	328	50.0	—	6-9613 32 3499
38 mm	Unique SSV-W-38-200-NO-EPDM	334	49.5	—	6-9613 32 1617
51 mm	Unique-SSV-W-51-200-NO-EPDM	389	62.0	—	6-9613 32 1509
63.5 mm	Unique-SSV-W-63.5-200-NO-EPDM	415	82.0	—	6-9613 32 0027
76 mm	Unique-SSV-W-76-200-NO-EPDM	453	87.0	—	6-9613 36 0840
101.6 mm	Unique-SSV-W-101.6-200-NO-EPDM	498	120.0	—	6-9613 32 3701
104 mm	Unique-SSV-W-100-200-NO-EPDM	500	120.0	—	6-9613 32 3500

SSV 300 — Normally Open, Maintainable Actuator

Normally open SSV 300 execution with serviceable pneumatic actuator, hygienic welding connections and EPDM sealing components.

Normally Open SSV 300 Two-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique SSV-W-25-300-NO-EPDM	313	50.0	—	6-9613 32 3501
38 mm	Unique SSV-W-38-300-NO-EPDM	314	49.5	—	6-9613 32 3502
51 mm	Unique SSV-W-51-300-NO-EPDM	364	62.0	—	6-9613 32 3503
63.5 mm	Unique SSV-W-63.5-300-NO-EPDM	390	82.0	—	6-9613 32 1502
76.1 mm	Unique SSV-W-76.1-300-NO-EPDM	423	87.0	—	6-9613 32 1503
101.6 mm	Unique SSV-W-101.6-300-NO-EPDM	468	120.0	—	6-9613 32 3740
104 mm	Unique SSV-W-100-300-NO-EPDM	500	120.0	—	6-9613 32 3504

SSV 210 — Normally Open, Maintainable Actuator

Three-port normally open valve for hygienic product routing, diversion and process-line changeover. The actuator can be opened for maintenance and inspection.

Normally Open SSV 210 Three-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique SSV-W-25-210-NO-EPDM	372	50.0	47.8	6-9613 32 0514
38 mm	Unique SSV-W-38-210-NO-EPDM	391	49.5	60.8	6-9613 36 0843
51 mm	Unique-SSV-W-51-210-NO-EPDM	456	62.0	73.8	6-9613 36 0832
63.5 mm	Unique-SSV-W-63.5-210-NO-EPDM	498	82.0	86.3	6-9613 36 0834
76 mm	Unique-SSV-W-76-210-NO-EPDM	549	82.0	83.3	6-9613 36 0838
101.6 mm	Unique-SSV-W-101.6-210-NO-EPDM	619	120.0	123.6	6-9613 32 0515
104 mm	Unique-SSV-W-100-210-NO-EPDM	623	120.0	126.0	6-9613 32 3505

SSV 220 — Normally Open, Maintainable Actuator

Alternative three-port normally open execution with hygienic welding connections, EPDM sealing elements and a maintainable pneumatic actuator.

Normally Open SSV 220 Three-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique SSV-W-25-220-NO-EPDM	372	50.0	47.8	6-9613 32 3506
38 mm	Unique SSV-W-38-220-NO-EPDM	391	49.5	60.8	6-9613 32 0602
51 mm	Unique SSV-W-51-220-NO-EPDM	456	62.0	73.8	6-9613 36 0833
63.5 mm	Unique-SSV-W-63.5-220-NO-EPDM	498	82.0	86.3	6-9613 36 0836
76 mm	Unique-SSV-W-76-220-NO-EPDM	549	87.0	98.9	6-9613 36 0839
101.6 mm	Unique-SSV-W-101.6-220-NO-EPDM	619	120.0	123.6	6-9613 32 3784
104 mm	Unique-SSV-W-100-220-NO-EPDM	623	120.0	126.0	6-9613 32 3507

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Normally Closed Single Seat Valves — Maintainable Actuator

Fail-closed hygienic single seat valves with serviceable pneumatic actuators. The spring-return actuator maintains the selected valve seat in the closed position when control air is unavailable.

SSV 200 — Normally Closed, Maintainable Actuator

Two-port fail-closed hygienic valve with welding connections, EPDM product seals and a serviceable pneumatic actuator.

Normally Closed SSV 200 Two-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-200-NC-EPDM	328	50.0	—	6-9613 32 0029
38 mm	Unique-SSV-W-38-200-NC-EPDM	334	49.5	—	6-9613 32 0030
51 mm	Unique-SSV-W-51-200-NC-EPDM	389	62.0	—	6-9613 32 0031
63.5 mm	Unique-SSV-W-63.5-200-NC-EPDM	415	82.0	—	6-9613 36 0842
76 mm	Unique-SSV-W-76-200-NC-EPDM	453	87.0	—	6-9613 36 0845
101.6 mm	Unique-SSV-W-101.6-200-NC-EPDM	498	87.0	—	6-9613 36 0841
104 mm	Unique-SSV-W-100-200-NC-EPDM	500	120.0	—	6-9613 32 3334

SSV 300 — Normally Closed, Maintainable Actuator

Alternative two-port fail-closed execution with EPDM seals, welding ends and a maintainable pneumatic actuator.

Normally Closed SSV 300 Two-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-300-NC-EPDM	328	50.0	—	6-9613 32 0037
38 mm	Unique-SSV-W-38-300-NC-EPDM	334	49.5	—	6-9613 32 0036
51 mm	Unique-SSV-W-51-300-NC-EPDM	389	62.0	—	6-9613 32 0035
63.5 mm	Unique-SSV-W-63.5-300-NC-EPDM	415	82.0	—	6-9613 32 0034
76 mm	Unique-SSV-W-76.1-300-NC-EPDM	453	87.0	—	6-9613 32 0033
101.6 mm	Unique-SSV-W-101.6-300-NC-EPDM	498	120.0	—	6-9613 32 0032
104 mm	Unique-SSV-W-100-300-NC-EPDM	500	120.0	—	6-9613 32 2128

SSV 210 — Normally Closed, Maintainable Actuator

Three-port fail-closed valve designed for hygienic routing and changeover duties, with welding ends, EPDM seals and a serviceable pneumatic actuator.

Normally Closed SSV 210 Three-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique-SSV-W-25-210-NC-EPDM	372	50.0	47.8	6-9613 32 0038
38 mm	Unique-SSV-W-38-210-NC-EPDM	391	49.5	60.8	6-9613 32 0173
51 mm	Unique-SSV-W-51-210-NC-EPDM	456	62.0	73.8	6-9613 32 0123
63.5 mm	Unique-SSV-W-63.5-210-NC-EPDM	498	82.0	86.3	6-9613 36 0835
76.1 mm	Unique SSV-W-76.1-210-NC-EPDM	549	82.0	86.3	6-9613 32 0190
101.6 mm	Unique SSV-W-101.6-210-NC-EPDM	619	120.0	123.6	6-9613 32 0174
104 mm	Unique-SSV-W-100-210-NC-EPDM	623	120.0	126.0	6-9613 32 2233

SSV 220 — Normally Closed, Maintainable Actuator

Alternative three-port fail-closed configuration with welding ends, EPDM seals and a serviceable maintainable actuator.

Normally Closed SSV 220 Three-Port Maintainable Actuator Welding Ends EPDM

Size / OD	Denomination	A	E	C	Tetra Pak Part No.
25 mm	Unique SSV-W-25-220-NC-EPDM	372	50.0	47.8	6-9613 32 0278
38 mm	Unique SSV-W-38-220-NC-EPDM	391	49.5	60.8	6-9613 32 0315
51 mm	Unique SSV-W-51-220-NC-EPDM	456	62.0	73.8	6-9613 32 1527
63.5 mm	Unique SSV-W-63.5-220-NC-EPDM	498	82.0	86.3	6-9613 36 0837
76 mm	Unique SSV-W-76-220-NC-EPDM	549	87.0	98.9	6-9613 36 0844
101.6 mm	Unique SSV-W-101.6-220-NC-EPDM	619	120.0	123.6	6-9613 32 2162
104 mm	Unique SSV-W-100-220-NC-EPDM	623	120.0	126.0	6-9613 32 2129

Dimensions are presented in millimetres. Values and part numbers have been transcribed from the supplied Tetra Pak reference tables. Current OEM availability and configuration compatibility should be reconfirmed before quotation or purchase.

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Normally Open Single Seat Valves — W/SMS

Three-port hygienic single seat valves with welding-end and SMS connection configurations. These pneumatically actuated SSV 210 and SSV 220 valves remain open in the normal spring-return position.

SSV 210 — Normally Open, W/SMS

Three-port normally open hygienic valve with a combined welding-end and SMS connection arrangement. It is suitable for sanitary routing, diverting and product-line changeover duties.

Normally Open SSV 210 Three-Port W/SMS Pneumatic Actuator EPDM

Size	Denomination	A	C	E	Tetra Pak Part No.
25 mm	Unique-SSV-W/SMS-25-210-NO-EPDM	372	47.8	50.0	6-9613 32 0064
38 mm	Unique-SSV-W/SMS-38-210-NO-EPDM	391	60.8	49.5	6-9613 32 0065
51 mm	Unique-SSV-W/SMS-51-210-NO-EPDM	456	73.8	62.0	6-9613 32 0066
63.5 mm	Unique-SSV-W/SMS-63.5-210-NO-EPDM	498	86.3	82.0	6-9613 32 0067
76.1 mm	Unique-SSV-W/SMS-76.1-210-NO-EPDM	549	98.9	87.0	6-9613 32 0068
101.4 mm	Unique-SSV-W/SMS-101.4-210-NO-EPDM	619	123.6	120.0	6-9613 32 0069

SSV 220 — Normally Open, W/SMS

Alternative normally open three-port arrangement with welding and SMS process connections. The SSV 220 internal plug orientation differs from the SSV 210 configuration.

Normally Open SSV 220 Three-Port W/SMS Pneumatic Actuator EPDM

Size	Denomination	A	C	E	Tetra Pak Part No.
38 mm	Unique-SSV-W/SMS-38-220-NO-EPDM	391	60.8	49.5	6-9613 32 0071
51 mm	Unique-SSV-W/SMS-51-220-NO-EPDM	456	73.8	62.0	6-9613 32 0072
63.5 mm	Unique-SSV-W/SMS-63.5-220-NO-EPDM	498	86.3	82.0	6-9613 32 0073
76.1 mm	Unique-SSV-W/SMS-76.1-220-NO-EPDM	549	98.9	87.0	6-9613 32 0074
101.4 mm	Unique-SSV-W/SMS-101.4-220-NO-EPDM	619	123.6	120.0	6-9613 32 0075

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Normally Closed Single Seat Valves — W/SMS

Fail-closed three-port SSV 210 and SSV 220 valves with combined welding-end and SMS process connections. The spring-return actuator maintains the designated seat in its closed position when compressed air is unavailable.

SSV 210 — Normally Closed, W/SMS

Three-port fail-closed routing valve with welding and SMS process connections. The hygienic product-contact seals are specified in EPDM.

Normally Closed SSV 210 Three-Port W/SMS Fail-Closed EPDM

Size	Denomination	A	C	E	Tetra Pak Part No.
25 mm	Unique-SSV-W/SMS-25-210-NC-EPDM	372	47.8	50.0	6-9613 32 0053
38 mm	Unique-SSV-W/SMS-38-210-NC-EPDM	391	60.8	49.5	6-9613 32 0054
51 mm	Unique-SSV-W/SMS-51-210-NC-EPDM	456	73.8	62.0	6-9613 32 0041
63.5 mm	Unique-SSV-W/SMS-63.5-210-NC-EPDM	498	86.3	82.0	6-9613 32 0055
76.1 mm	Unique-SSV-W/SMS-76.1-210-NC-EPDM	549	98.9	87.0	6-9613 32 0056
101.4 mm	Unique-SSV-W/SMS-101.4-210-NC-EPDM	619	123.6	120.0	6-9613 32 0057

SSV 220 — Normally Closed, W/SMS

Alternative fail-closed three-port valve with combined welding and SMS connections. The SSV 220 plug orientation supports a different hygienic routing configuration from the SSV 210.

Normally Closed SSV 220 Three-Port W/SMS Fail-Closed EPDM

Size	Denomination	A	C	E	Tetra Pak Part No.
38 mm	Unique-SSV-W/SMS-38-220-NC-EPDM	391	60.8	49.5	6-9613 32 0059
51 mm	Unique-SSV-W/SMS-51-220-NC-EPDM	456	73.8	62.0	6-9613 32 0060
63.5 mm	Unique-SSV-W/SMS-63.5-220-NC-EPDM	498	86.3	82.0	6-9613 32 0061
76.1 mm	Unique-SSV-W/SMS-76.1-220-NC-EPDM	549	98.9	87.0	6-9613 32 0062
101.4 mm	Unique-SSV-W/SMS-101.4-220-NC-EPDM	619	123.6	120.0	6-9613 32 0063

Dimensions are shown in millimetres. The SSV 220 W/SMS tables supplied by the OEM begin at 38 mm and do not display a 25 mm configuration. Part numbers and dimensional references should be reconfirmed against current manufacturer data before ordering.

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Normally Open Single Seat Valves — DIN

Pneumatically actuated hygienic single seat valves with DIN-sized welding connections. These configurations remain open in their normal spring-return position and close when pneumatic control air is applied.

SSV 200 — Normally Open, DIN

Straight-through, two-port hygienic single seat valve with DIN welding ends, EPDM product-contact seals and normally open pneumatic operation.

Normally Open SSV 200 Two-Port DIN Welding Ends EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-200-NO-EPDM	330	50.0	—	6-9613 36 0020
DN40	Unique-SSV-W-DN40-200-NO-EPDM	335	49.5	—	6-9613 36 0021
DN50	Unique-SSV-W-DN50-200-NO-EPDM	390	62.0	—	6-9613 36 0022
DN65	Unique-SSV-W-DN65-200-NO-EPDM	414	78.0	—	6-9613 36 0023
DN80	Unique-SSV-W-DN80-200-NO-EPDM	457	87.0	—	6-9613 36 0024
DN100	Unique-SSV-W-DN100-200-NO-EPDM	500	120.0	—	6-9613 36 0025

SSV 300 — Normally Open, DIN

Alternative two-port normally open valve execution with DIN welding ends, EPDM seals and pneumatic spring-return actuation.

Normally Open SSV 300 Two-Port DIN Welding Ends EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-300-NO-EPDM	330	50.0	—	6-9613 36 0046
DN40	Unique-SSV-W-DN40-300-NO-EPDM	335	49.5	—	6-9613 36 0047
DN50	Unique-SSV-W-DN50-300-NO-EPDM	390	62.0	—	6-9613 36 0048
DN65	Unique-SSV-W-DN65-300-NO-EPDM	414	78.0	—	6-9613 36 0049
DN80	Unique-SSV-W-DN80-300-NO-EPDM	457	87.0	—	6-9613 36 0050
DN100	Unique-SSV-W-DN100-300-NO-EPDM	500	120.0	—	6-9613 36 0051

SSV 210 — Normally Open, DIN

Three-port normally open DIN valve for hygienic product routing, diversion and process-line changeover applications.

Normally Open SSV 210 Three-Port DIN Welding Ends EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-210-NO-EPDM	379	50.0	52	6-9613 36 0072
DN40	Unique-SSV-W-DN40-210-NO-EPDM	396	49.5	64	6-9613 36 0073
DN50	Unique-SSV-W-DN50-210-NO-EPDM	463	62.0	76	6-9613 36 0074
DN65	Unique-SSV-W-DN65-210-NO-EPDM	503	78.0	92	6-9613 36 0075
DN80	Unique-SSV-W-DN80-210-NO-EPDM	561	87.0	107	6-9613 36 0076
DN100	Unique-SSV-W-DN100-210-NO-EPDM	623	120.0	126	6-9613 36 0077

SSV 220 — Normally Open, DIN

Alternative three-port normally open DIN valve configuration for hygienic product routing and changeover duties.

Normally Open SSV 220 Three-Port DIN Welding Ends EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-220-NO-EPDM	379	50.0	52	6-9613 36 0098
DN40	Unique-SSV-W-DN40-220-NO-EPDM	396	49.5	64	6-9613 36 0099
DN50	Unique-SSV-W-DN50-220-NO-EPDM	463	62.0	76	6-9613 36 0100
DN65	Unique-SSV-W-DN65-220-NO-EPDM	503	78.0	92	6-9613 36 0101
DN80	Unique-SSV-W-DN80-220-NO-EPDM	561	87.0	107	6-9613 36 0102
DN100	Unique-SSV-W-DN100-220-NO-EPDM	623	120.0	126	6-9613 36 0103

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Normally Closed Single Seat Valves — DIN

Fail-closed hygienic single seat valves with DIN welding connections. The spring-return actuator maintains the selected valve seat in the closed position if pneumatic pressure is lost.

SSV 200 — Normally Closed, DIN

Two-port fail-closed hygienic valve with DIN welding ends and EPDM product-contact seals.

Normally Closed SSV 200 Two-Port DIN Fail-Closed EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-200-NC-EPDM	315	50.0	—	6-9613 36 0007
DN40	Unique-SSV-W-DN40-200-NC-EPDM	315	49.5	—	6-9613 36 0008
DN50	Unique-SSV-W-DN50-200-NC-EPDM	365	62.0	—	6-9613 36 0009
DN65	Unique-SSV-W-DN65-200-NC-EPDM	389	78.0	—	6-9613 36 0010
DN80	Unique-SSV-W-DN80-200-NC-EPDM	427	87.0	—	6-9613 36 0011
DN100	Unique-SSV-W-DN100-200-NC-EPDM	470	120.0	—	6-9613 36 0012

SSV 300 — Normally Closed, DIN

Alternative two-port fail-closed DIN valve with hygienic welding ends and EPDM product seals.

Normally Closed SSV 300 Two-Port DIN Fail-Closed EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-300-NC-EPDM	315	50.0	—	6-9613 36 0033
DN40	Unique-SSV-W-DN40-300-NC-EPDM	315	49.5	—	6-9613 36 0034
DN50	Unique-SSV-W-DN50-300-NC-EPDM	365	62.0	—	6-9613 36 0035
DN65	Unique-SSV-W-DN65-300-NC-EPDM	389	78.0	—	6-9613 36 0036
DN80	Unique-SSV-W-DN80-300-NC-EPDM	427	87.0	—	6-9613 36 0037
DN100	Unique-SSV-W-DN100-300-NC-EPDM	470	120.0	—	6-9613 36 0038

SSV 210 — Normally Closed, DIN

Three-port fail-closed DIN valve for hygienic line routing, product diversion and controlled process changeover.

Normally Closed SSV 210 Three-Port DIN Fail-Closed EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-210-NC-EPDM	367	50.0	52	6-9613 36 0059
DN40	Unique-SSV-W-DN40-210-NC-EPDM	379	49.5	64	6-9613 36 0060
DN50	Unique-SSV-W-DN50-210-NC-EPDM	441	62.0	76	6-9613 36 0061
DN65	Unique-SSV-W-DN65-210-NC-EPDM	481	78.0	92	6-9613 36 0062
DN80	Unique-SSV-W-DN80-210-NC-EPDM	534	87.0	107	6-9613 36 0063
DN100	Unique-SSV-W-DN100-210-NC-EPDM	569	120.0	126	6-9613 36 0064

SSV 220 — Normally Closed, DIN

Alternative three-port fail-closed DIN configuration with hygienic welding ends and EPDM product-contact seals.

Normally Closed SSV 220 Three-Port DIN Fail-Closed EPDM

DIN Size	Denomination	A	E	C	Tetra Pak Part No.
DN25	Unique-SSV-W-DN25-220-NC-EPDM	367	50.0	52	6-9613 36 0085
DN40	Unique-SSV-W-DN40-220-NC-EPDM	379	49.5	64	6-9613 36 0086
DN50	Unique-SSV-W-DN50-220-NC-EPDM	441	62.0	76	6-9613 36 0087
DN65	Unique-SSV-W-DN65-220-NC-EPDM	481	78.0	92	6-9613 36 0088
DN80	Unique-SSV-W-DN80-220-NC-EPDM	534	87.0	107	6-9613 36 0089
DN100	Unique-SSV-W-DN100-220-NC-EPDM	569	120.0	126	6-9613 36 0090

All dimensions are stated in millimetres. Part numbers, denominations and dimensional references were transcribed from the supplied Tetra Pak DIN reference tables. Current availability and exact valve compatibility should be reconfirmed before ordering.

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Aseptic Single Seat Valves — Normally Closed, Inch

Aseptic normally closed single seat valves with hygienic welding connections and PTFE/EPDM sealing systems. These configurations are intended for applications requiring enhanced separation of the product zone from the external environment.

SSV 200 Aseptic — Normally Closed, Inch

Two-port aseptic single seat valve with normally closed pneumatic operation, hygienic welding ends and PTFE/EPDM sealing components. The aseptic stem-sealing arrangement provides an additional hygienic barrier between the actuator area and the product-contact zone.

Aseptic Normally Closed SSV 200 Two-Port Welding Ends PTFE / EPDM

Size	Denomination	A	E	Tetra Pak Part No.
38 mm	Unique SSV-W-38-200-NC-EPDM-A	314	49.5	6-9613 36 0505
51 mm	Unique SSV-W-51-200-NC-EPDM-A	367	62.0	6-9613 36 0506
63.5 mm	Unique SSV-W-63.5-200-NC-EPDM-A	394	82.0	6-9613 36 0507
76.1 mm	Unique SSV-W-76.1-200-NC-EPDM-A	432	87.0	6-9613 36 0508
101.6 mm	Unique SSV-W-101.6-200-NC-EPDM-A	482	120.0	6-9613 36 0509

SSV 300 Aseptic — Normally Closed, Inch

Alternative two-port aseptic valve configuration with normally closed pneumatic operation, hygienic welding ends and PTFE/EPDM stem and product-sealing elements.

Aseptic Normally Closed SSV 300 Two-Port Welding Ends PTFE / EPDM

Size	Denomination	A	E	Tetra Pak Part No.
38 mm	Unique SSV-W-38-300-NC-EPDM-A	314	49.5	6-9613 36 0529
51 mm	Unique SSV-W-51-300-NC-EPDM-A	367	62.0	6-9613 36 0530
63.5 mm	Unique SSV-W-63.5-300-NC-EPDM-A	394	82.0	6-9613 36 0531
76.1 mm	Unique SSV-W-76.1-300-NC-EPDM-A	432	87.0	6-9613 36 0532
101.6 mm	Unique SSV-W-101.6-300-NC-EPDM-A	482	120.0	6-9613 36 0533

The supplied OEM aseptic-inch table begins at 38 mm. No 25 mm aseptic configuration is displayed in the source table.

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Aseptic Single Seat Valves — Normally Closed, DIN

DIN-sized aseptic single seat valves with normally closed pneumatic operation, hygienic welding ends and PTFE/EPDM sealing systems for sterile and high-hygiene process applications.

SSV 200 Aseptic — Normally Closed, DIN

DIN-sized two-port aseptic valve with hygienic welding ends, normally closed pneumatic operation and PTFE/EPDM sealing elements.

Aseptic Normally Closed SSV 200 DIN Welding Ends PTFE / EPDM

DIN Size	Denomination	A	E	Tetra Pak Part No.
DN40	Unique SSV-W-40-200-NC-EPDM-A	316	49.5	6-9613 36 0511
DN50	Unique SSV-W-50-200-NC-EPDM-A	369	62.0	6-9613 36 0512
DN65	Unique SSV-W-65-200-NC-EPDM-A	397	78.0	6-9613 36 0513
DN80	Unique SSV-W-80-200-NC-EPDM-A	436	87.0	6-9613 36 0514
DN100	Unique SSV-W-100-200-NC-EPDM-A	484	120.0	6-9613 36 0515

SSV 300 Aseptic — Normally Closed, DIN

Alternative DIN aseptic valve execution with normally closed pneumatic operation, hygienic welding ends and PTFE/EPDM sealing components.

Aseptic Normally Closed SSV 300 DIN Welding Ends PTFE / EPDM

DIN Size	Denomination	A	E	Tetra Pak Part No.
DN40	Unique SSV-W-40-300-NC-EPDM-A	316	49.5	6-9613 36 0535
DN50	Unique SSV-W-50-300-NC-EPDM-A	369	62.0	6-9613 36 0536
DN65	Unique SSV-W-65-300-NC-EPDM-A	397	78.0	6-9613 36 0537
DN80	Unique SSV-W-80-300-NC-EPDM-A	436	87.0	6-9613 36 0538

The supplied SSV 300 aseptic DIN table displays configurations from DN40 through DN80. A DN100 SSV 300 aseptic configuration is not shown in the source table.

OEM reference notice: Valve denominations, dimensional references and Tetra Pak part numbers on this page have been transcribed from the supplied OEM reference tables. Product revisions, availability and compatibility may change over time. The latest manufacturer documentation and the complete valve specification should therefore be reconfirmed before quotation, procurement or installation.

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Frequently Asked Questions

Technical guidance for identifying, selecting and requesting hygienic single seat valves and compatible OEM-reference configurations.

What is the difference between an SSV and an SSSV?

SSV refers to the standard Single Seat Valve family used for hygienic shut-off, routing and change-over duties. SSSV refers to the compact Small Single Seat Valve family, which is generally intended for smaller process, utility, dosing or sampling lines.

Final identification should be based on the complete denomination, body arrangement, connection size, actuator execution and sealing material rather than the abbreviation alone.

When should a two-port or three-port seat valve be selected?

A two-port valve is normally used for straightforward shut-off or isolation of one process line. A three-port valve is used when the process requires routing, diverting, change-over or connection between more than one flow path.

SSV 210 and SSV 220 are both three-port configurations, but their internal body and plug arrangements differ. The correct version must therefore be selected according to the required flow direction and fail-safe position.

What is the difference between normally open and normally closed operation?

A normally closed valve remains closed in its spring-return position and opens when pneumatic control air is applied. A normally open valve remains open in its spring-return position and closes when air pressure is applied.

The required actuation logic should be selected according to the safe process condition in the event of compressed-air or control-system failure.

When is an aseptic single seat valve required?

An aseptic valve is normally considered when the process requires enhanced separation between the product-contact zone and the external actuator environment. Typical applications include sterile, high-purity and contamination-sensitive production systems.

The aseptic configurations listed on this page use a dedicated stem-sealing concept and PTFE/EPDM sealing arrangements. Actual suitability must be confirmed against process temperature, pressure, cleaning method and sterilization requirements.

How should the correct seal material be selected?

Seal selection depends on the product, CIP chemicals, sterilization temperature, operating pressure and required regulatory compliance. EPDM is widely used in hygienic processing, while FPM and PTFE-based arrangements may be selected for specific chemical or temperature conditions.

The seal material shown in an OEM denomination should always be checked against the actual process medium before ordering.

What information is required for an accurate valve quotation?

For accurate selection and quotation, provide as much of the following information as possible:

Valve model or existing OEM part number
Nominal pipe size and connection standard
Two-port or three-port body arrangement
Normally open, normally closed or manual operation
Product or process medium
Operating and cleaning temperature
Working pressure and available control-air pressure
Required seal material
Photos, nameplate details or dimensional drawings

Can LGN assist with identifying a valve from an OEM part number?

Yes. LGN can review an available OEM reference, valve denomination, nameplate, process connection, body arrangement and dimensional information to support identification and configuration selection.

A part number alone may not always reveal every option, so photographs and complete process details are recommended, especially for older or modified installations.

Engineering Selection Support

Need help selecting the correct hygienic seat valve?

Send us your process conditions, connection details and any available OEM reference. Our team will review the application and recommend the most appropriate valve configuration, connection standard, actuation logic and sealing arrangement.

Line size and connection standard
Two-port or three-port function
Product or process medium
Operating pressure and temperature
NC, NO or manual operation
OEM part number or valve photograph

Request Technical Proposal Request a Quotation

Include the OEM reference or a clear valve photo whenever available.