CPM constant pressure valves are sanitary, pneumatically controlled process valves designed to maintain a stable pressure in stainless-steel hygienic pipelines. The range includes CPMI-2 and CPMI-D60 inlet-pressure valves, together with the CPMO-2 outlet-pressure valve.
CPM valves use the balance between regulated compressed-air pressure and product-line pressure to maintain a selected process pressure without requiring a conventional motorised control valve.
Product pressure acts directly on a flexible diaphragm assembly connected to the valve plug. Changes in line pressure move the diaphragm and adjust the plug position until balance with the pneumatic pressure setpoint is restored.
CPM valve bodies are manufactured for hygienic stainless-steel process systems. Product-contact components use sanitary materials and diaphragm arrangements selected for food, dairy and beverage processing.
The valve designation identifies which side of the process line is stabilised. CPMI valves control pressure upstream of the valve, while CPMO valves control pressure downstream of the valve.
CPMI-2 and CPMI-D60 maintain constant pressure on the inlet side of the valve. Increasing upstream product pressure causes the valve to open further, relieving excess pressure and restoring the selected setpoint.
CPMO-2 maintains constant pressure on the outlet side of the valve. Increasing product pressure causes the valve to move toward its closed position, restricting flow and stabilising downstream pressure.
Constant pressure valves support stable product handling and repeatable operation throughout hygienic food, dairy and beverage process lines.
Stabilisation of upstream pressure after centrifugal separation equipment and related hygienic process stages.
Maintenance of controlled line pressure following heating or cooling sections in sanitary process systems.
Stable downstream product pressure for consistent supply to hygienic filling and bottling equipment.
Sanitary overflow regulation and back-pressure control for continuous product circulation and process protection.
A CPM valve continuously compares the force created by regulated compressed air with the force generated by product pressure. The diaphragm and valve plug move automatically until these opposing forces return to equilibrium.
Clean compressed air is supplied through an external pressure-regulating valve. This regulated air pressure acts on one side of the flexible diaphragm and establishes the desired process-pressure setpoint.
The animation illustrates air pressure, diaphragm movement, plug displacement and hygienic product flow.
Product pressure rises or falls because of a process-flow or equipment-condition change.
The pressure imbalance moves the diaphragm, valve stem and plug without electrical positioning.
The changed flow opening returns the regulated process pressure toward its pneumatic setpoint.
CPMI and CPMO valves use a similar hygienic diaphragm-based pressure-balancing principle, but they control pressure at different positions in the process line and respond differently when product pressure increases.
CPMI maintains a preset pressure on the inlet side of the valve. It is commonly installed downstream of process equipment where stable upstream or back-pressure conditions are required.
CPMO maintains a preset pressure on the outlet side of the valve. It is selected where the downstream process requires stable supply pressure despite changing inlet or flow conditions.
| Engineering Criterion | CPMI | CPMO |
|---|---|---|
| Full designation | Constant-Pressure Modulating Inlet | Constant-Pressure Modulating Outlet |
| Pressure controlled | Inlet or upstream process pressure | Outlet or downstream process pressure |
| Response to rising pressure | Opens further | Closes further |
| Response to falling pressure | Closes further | Opens further |
| Typical process position | After separators, heat exchangers or other equipment | Before filling machines or sensitive downstream users |
| Typical control purpose | Back-pressure, overflow and equipment operating-pressure stabilization | Stable downstream feed and outlet-pressure regulation |
| Control technology | Pneumatic setpoint and diaphragm-pressure balancing | Pneumatic setpoint and diaphragm-pressure balancing |
| Product-line transmitter | Normally not required for the basic self-regulating pneumatic arrangement | Normally not required for the basic self-regulating pneumatic arrangement |
| Available references | CPMI-2 and higher-capacity CPMI-D60 | CPMO-2 |
The pressure that must remain stable is located before the valve, or when the valve is required to create controlled back pressure after a separator, heat exchanger or similar process unit.
The pressure that must remain stable is located after the valve, particularly when feeding a filling machine, bottling section or another downstream process requiring consistent supply pressure.
A constant pressure valve combines a pneumatic pressure-balancing actuator with a hygienic product valve body. The semi-exploded cross-section below illustrates the functional relationship between the air chamber, flexible diaphragm, valve stem, plug, seat and product-flow passage.
Hygienic constant pressure valves are used wherever a stable upstream or downstream pressure must be maintained despite changing process flow, equipment demand or line conditions.
CPM valves support stable process conditions in sanitary production lines where pressure control directly affects product quality, equipment performance and filling accuracy.
Maintains stable supply pressure before fillers, dosing units and packaging machines despite changes in downstream demand.
Supports controlled pressure through heating, cooling and regeneration sections of hygienic thermal-processing systems.
Stabilizes pressure in recirculating systems and helps prevent fluctuating flow conditions during variable production demand.
Provides controlled back pressure downstream of pumps and protects the process from sudden pressure variations.
Used in milk, juice, soft-drink and liquid-food lines requiring repeatable hygienic pressure regulation.
Supports sanitary liquid transfer where cleanability, controlled pressure and documented process consistency matter.
Helps maintain stable process pressure for creams, lotions, personal-care liquids and hygienic batch-transfer systems.
Supports stable circulation pressure in cleaning, water and compatible hygienic utility systems.
Constant pressure control improves process stability without relying on complex external control loops for every operating condition.
Maintains a controlled inlet or outlet pressure as process demand changes.
Reduces pressure-related variation in filling, heating and hygienic liquid transfer.
Smooth product-contact surfaces support sanitary operation and effective cleaning.
Pneumatic and process forces interact directly to regulate valve opening.
Combines pressure regulation and hygienic flow control in one compact valve assembly.
Dampens pressure changes caused by pumps, fillers and changing downstream demand.
Clamp connections and modular internal components simplify inspection and maintenance.
Available in multiple connection standards, sizes and pressure control configurations.
Valve selection begins by determining whether the pressure must remain constant before or after the valve.
CPMI valves maintain a stable pressure upstream of the valve and regulate flow according to changing downstream demand.
CPMO valves maintain stable pressure downstream of the valve, particularly before fillers and pressure-sensitive equipment.
CPM valve families are available in hygienic dimensional standards suitable for different regional piping systems.
Select CPMI when the controlled pressure is located before the valve. Select CPMO when the required stable pressure is located after the valve. Final sizing must also consider flow rate, product properties, pressure range, temperature, connection standard and required Kvs value.
A CPM valve designation normally combines the pressure-control principle, valve configuration, nominal size and connection standard. Correct interpretation of these elements is essential when identifying replacement valves, internal components and compatible accessories.
Exact OEM ordering codes vary by generation and configuration, but the following structure illustrates how a constant pressure valve denomination is commonly interpreted.
Identifies whether the valve controls pressure before the valve or after the valve.
Distinguishes the internal valve arrangement or model family, such as CPMI-2 or CPMO-2.
Indicates the hygienic connection size, commonly expressed in DN, inch or tube dimensions.
Defines the dimensional system used for weld ends or hygienic connections, such as DIN or inch standards.
The Kvs value expresses the valve flow capacity. It is defined as the quantity of water in cubic metres per hour that flows through a fully open valve with a pressure drop of one bar under specified reference conditions.
The selected Kvs must provide the required process flow without creating an excessive pressure loss.
Valve capacity must be evaluated against the actual pressure difference available across the valve.
Density, viscosity, solids content and temperature influence the real flow behaviour through the valve.
A valve that is too large may operate close to the closed position and provide unstable or insensitive control.
The following table explains how common process conditions influence the selected valve size and flow coefficient.
| Process Condition | Selection Effect | Engineering Consideration | Risk if Incorrect |
|---|---|---|---|
| High required flow | Higher Kvs | Confirm that the valve can pass the required flow at the available pressure drop. | Excessive restriction and insufficient production flow. |
| Low regulating flow | Lower Kvs | Select a valve capable of operating within a useful opening range rather than nearly closed. | Poor control sensitivity and unstable pressure regulation. |
| Viscous product | Recalculate | Correct the sizing calculation for viscosity and actual product behaviour. | Lower-than-expected flow and excessive pressure loss. |
| Small pressure drop | Higher Kvs | More flow capacity is required when only a small pressure difference is available. | The valve may not achieve the design flow rate. |
| Large pressure drop | Verify duty | Confirm pressure ratings, noise risk, velocity and possible cavitation conditions. | Premature wear, noise or unstable valve operation. |
| Wide operating range | Review range | Evaluate minimum, normal and maximum flow conditions rather than sizing only for peak demand. | Oversizing during normal production conditions. |
The final valve size and Kvs value should always be confirmed using the applicable manufacturer data sheet, valve generation, product properties, connection dimensions and real operating pressure conditions. Nominal pipe size alone is not sufficient for accurate CPM valve selection.
The CPM Inch family is designed for hygienic processing installations using imperial tube standards. These valves provide stable pressure control while maintaining compatibility with sanitary process piping, food-grade cleaning procedures and CIP/SIP operation.
CPM Inch valves are widely used throughout dairy, beverage, brewery, pharmaceutical and food processing plants where inch tubing standards remain the preferred installation format.
Designed for hygienic inch pipe installations.
Suitable for repeated cleaning and sterilisation cycles.
Maintains accurate process pressure under changing flow.
Fully hygienic body design with serviceable components.
The CPM DIN family is intended for hygienic process installations using metric tube dimensions and DIN-based connection standards. These configurations combine sanitary pressure regulation with dimensional compatibility for European-style process piping.
DIN configurations are commonly selected for dairy, beverage, food, pharmaceutical and cosmetic plants designed around metric hygienic tube systems. The pressure-control principle remains the same as other CPM variants, while the valve ends and dimensional interface are adapted to the selected DIN connection standard.
Available dimensions depend on the exact valve generation, body configuration and connection specification.
The cards below describe the principal model families and configuration groups typically encountered when identifying hygienic constant pressure valves and replacement components.
Inlet-pressure regulating valve for metric hygienic lines.
Large-diaphragm inlet pressure-control configuration.
Outlet-pressure regulating valve for metric hygienic lines.
Metric hygienic process body with compatible connection ends.
Maintenance components for compatible CPM valve assemblies.
Weld ends, clamps and installation components.
Select a DIN configuration when the plant uses metric hygienic tube dimensions and matching weld-end standards. Confirm the exact nominal size and outside diameter before ordering.
Select an inch configuration when the process line uses imperial sanitary tube dimensions. Similar nominal descriptions do not guarantee dimensional interchangeability with DIN components.
Before selecting a valve body, weld end, service kit or complete replacement valve, verify the pressure-control principle, model designation, tube outside diameter, nominal size, connection geometry, valve generation, material and elastomer specification.
Reliable operation of hygienic constant pressure valves depends on correct maintenance, compatible elastomers and accurate identification of the valve model, size, connection standard and component generation.
CPM valve accessories include product-contact seals, pneumatic actuator components, diaphragms, valve internals, clamp parts and connection components. The correct part must be selected against the exact valve configuration rather than only the nominal pipe size.
Replace wear parts according to operating hours, CIP frequency, process temperature and the condition of the installed seals.
Confirm that the elastomer grade is suitable for the product, cleaning chemicals, temperature and regulatory requirements.
Follow the applicable service procedure, tightening sequence, lubrication guidance and inspection instructions.
Verify the complete valve designation, connection dimensions, actuator type and available nameplate or serial information.
Replacement parts may differ between CPMI, CPMO, D60, DIN, inch and different valve generations. Compatibility should always be confirmed before ordering.
Product-contact and actuator sealing elements supplied as individual components or complete service-kit combinations.
Flexible pressure-balancing elements and associated support parts used inside the pneumatic actuator assembly.
Mechanical and product-contact components responsible for guiding, throttling and pressure-regulating action.
Components used to supply and adjust the regulated air pressure that establishes the valve pressure setpoint.
Mechanical connection components used to secure the actuator, bonnet and hygienic valve body assemblies.
Hygienic process connection parts selected according to the installed metric or imperial tube standard.
Pre-grouped maintenance packages intended for scheduled valve overhaul or restoration of critical wear components.
Supporting items used during safe disassembly, inspection, seal installation and reassembly of the valve.
This reference groups the parts commonly requested for CPM valve maintenance. The exact part number must be confirmed using the applicable model, size, generation and material specification.
| Component Group | Typical Parts | Identification Requirement | Common Replacement Reason |
|---|---|---|---|
| Product seals | Hygienic | Valve model, size, elastomer grade and process duty. | Wear, swelling, leakage or scheduled hygienic maintenance. |
| Actuator diaphragm | Pneumatic | Actuator type, diaphragm diameter and valve generation. | Loss of pressure control, cracking or fatigue. |
| Valve plug and seat | Regulating | CPMI or CPMO family, valve size, Kvs and internal geometry. | Erosion, mechanical wear or unstable regulation. |
| Stem and guide parts | Mechanical | Stem dimensions, guide arrangement and seal configuration. | Excessive play, scoring, friction or damaged movement. |
| Clamp components | Assembly | Clamp diameter, body interface and hardware dimensions. | Deformation, corrosion, thread damage or missing hardware. |
| Weld ends | Connection | DIN or inch standard, outside diameter and wall thickness. | Retrofit, piping modification or damaged connection ends. |
Providing complete technical information reduces the risk of supplying incompatible seals, diaphragms, valve internals or connection components.
Include the complete valve designation, pressure-control duty, nominal size, DIN or inch connection standard, available Kvs, nameplate photograph, required quantity, elastomer preference and clear photographs of the installed component. Where the original part number is unavailable, dimensional verification may be required before quotation.
Selecting a hygienic constant pressure valve requires more than matching the valve to the nominal pipe size. The correct pressure control principle, flow capacity, Kvs value, connection standard, process conditions and maintenance requirements must all be evaluated.
The most suitable CPM valve is determined by the location at which pressure must remain stable, the expected operating flow, the available pressure differential and the physical properties of the processed product. Connection dimensions, hygienic compatibility and service requirements must then be confirmed.
The essential difference is the location of the pressure being controlled. CPMI regulates upstream pressure, while CPMO regulates downstream pressure.
Choose a CPMI configuration when the required stable pressure is located upstream of the valve. The valve responds to changes in inlet pressure and opens or closes to maintain the selected upstream pressure condition.
Choose a CPMO configuration when the required stable pressure is located downstream of the valve. The valve regulates its opening to maintain the selected pressure condition on the outlet side.
This sequence narrows the available valve configuration and helps prevent errors involving pressure direction, Kvs, connection dimensions, materials or replacement-part compatibility.
Determine whether the process requires stable pressure before the valve or after it. This establishes the CPMI or CPMO operating principle.
Identify the direction of product flow through the installed line. Valve-body orientation and pressure sensing must correspond to the intended process duty.
Use the design flow, available differential pressure, density, viscosity and required regulating range to establish the appropriate valve capacity.
Match the valve ends to the installed hygienic piping system. Similar nominal sizes do not necessarily have identical tube outside diameters.
Confirm the product-contact material, elastomer grade, process temperature, cleaning chemicals, sterilization conditions and hygienic requirements.
Review the exact valve family, size, generation, actuator configuration, maintenance interval and availability of compatible service components.
The following section provides the practical selection matrix, required process information, common specification errors and the final engineering verification checklist.
After choosing between CPMI and CPMO, the final valve configuration must be verified against the required flow range, pressure conditions, Kvs value, pipe standard, material specification and maintenance plan.
Use this matrix as an initial engineering reference. Final model, nominal size, Kvs value and actuator configuration must be checked against complete process data and applicable technical documentation.
| Application Requirement | Recommended Family | Controlled Pressure | Typical Installation | Main Verification Point |
|---|---|---|---|---|
| Stable pump discharge pressure | CPMI-2 | Before the valve | Downstream of a hygienic process pump | Required back pressure, design flow and available pressure drop |
| Sensitive or higher-capacity inlet-pressure control | CPMI-D60 | Before the valve | Demanding upstream pressure-regulating duty | Diaphragm size, actuator configuration and valve generation |
| Stable pressure before a filling machine | CPMO-2 | After the valve | Product line supplying a filler | Downstream setpoint and minimum-to-maximum filler demand |
| Metric hygienic process piping | CPM DIN | CPMI or CPMO duty | DIN-based dairy, beverage, food or pharmaceutical line | Tube outside diameter, wall thickness and end connection |
| Imperial hygienic process piping | CPM Inch | CPMI or CPMO duty | Sanitary inch-tube process installation | Exact nominal inch size and installed tube dimensions |
| Preventive maintenance or complete overhaul | Service Kit | Not applicable | Scheduled seal, diaphragm and wear-part replacement | Complete model, size, generation and elastomer specification |
Complete operating information allows the CPM family, nominal size, Kvs value, connection standard and material configuration to be evaluated from the actual duty rather than estimated from the pipe size alone.
The Kvs value represents the valve flow capacity under standardized reference conditions. Selecting a Kvs that is too small creates excessive pressure loss and insufficient flow. Selecting a Kvs that is too large may force the valve to regulate close to its closed position, reducing pressure stability and control sensitivity.
Most incorrect selections occur when only the nominal pipe size is considered while the pressure-control location, Kvs, flow range, connection dimensions or valve generation are overlooked.
CPMI cannot simply replace CPMO, or vice versa. The controlled pressure location must match the valve operating principle.
Excess capacity may cause the valve to operate near the closed position, reducing regulating stability and sensitivity.
Similar nominal descriptions may hide important differences in tube diameter, wall thickness and weld-end dimensions.
A photograph or nominal size alone may not identify compatible diaphragms, plugs, stems, seals or complete service kits.
Before issuing a purchase order or requesting a quotation, verify all essential process, mechanical and maintenance details. This reduces the risk of receiving an incompatible valve or spare-part kit.
A reliable CPM valve specification should confirm the pressure-control principle, flow direction, minimum and maximum flow, upstream and downstream pressure, product properties, temperature, available pneumatic pressure, Kvs value, connection standard, material, elastomer grade, valve generation and maintenance requirements.
Official OEM ordering references extracted from the supplied Tetra Pak documentation for Constant Pressure Valves.
The CPMI-2 Constant Pressure Valve is designed to maintain stable upstream pressure in hygienic processing systems. It is commonly installed in dairy, beverage, food and pharmaceutical production lines to protect downstream equipment and maintain consistent operating conditions.
| OEM Configuration | Official OEM Ordering Reference |
|---|---|
| CPMI-2-W-51 Kvs 23 EPDM | 6-9612 30 5501 |
| CPMI-2-W-51.0 Kvs 7 EPDM | 6-9612 30 5517 |
| CPMI-2-W-51 Kvs 2/15 EPDM | 6-9612 30 5503 |
The CPMI-D60 configuration is intended for hygienic process lines requiring a higher flow coefficient while maintaining stable upstream pressure. Confirm the complete denomination and ordering reference before quotation or replacement.
| OEM Configuration | Official OEM Ordering Reference |
|---|---|
| CPMI-D60-W-76.1-Kvs 60 EPDM | 6-31356 6141 1 |
The CPMO-2 family is used where a stable downstream pressure is required in hygienic processing systems. Selection must be based on the exact connection standard, Kvs value, elastomer and OEM ordering reference.
| OEM Configuration | Official OEM Ordering Reference |
|---|---|
| CPMO-2-W-51-Kvs 23 EPDM | 6-9612 30 5502 |
| CPMO-2-W-51-Kvs 2/15 EPDM | 6-9612 30 5504 |
| CPMO-2-W-51-Kvs 9 EPDM | 6-9612 30 5518 |
All DIN references are shown directly below for faster identification, printing and on-page search. No references are hidden inside an accordion.
| OEM Configuration | Official OEM Ordering Reference |
|---|---|
| CPMI-2-W-50-Kvs 23 EPDM | 6-9612 30 5505 |
| CPMI-2-W-50-Kvs 7 EPDM | 6-9612 30 5519 |
| CPMI-2-W-50-Kvs 2/15 EPDM | 6-9612 30 5507 |
| OEM Configuration | Official OEM Ordering Reference |
|---|---|
| CPMO-2-W-50-Kvs 23 EPDM | 6-9612 30 5506 |
| CPMO-2-W-50-Kvs 2/15 EPDM | 6-9612 30 5508 |
| CPMO-2-W-50-Kvs 9 EPDM | 6-9612 30 5520 |
Complete the valve identification process by checking the applicable accessory, operating function and installed configuration before requesting a quotation.
The following accessories were listed in the supplied Tetra Pak documentation for the CPM constant pressure valve range.
| Accessory Description | Applicable Valve Family | Official OEM Ordering Reference |
|---|---|---|
| Air Regulating Kit CPM | CPM Series | 6-31356 0150 1 |
| Throttle Valve for CPM | CPM Series | 6-31356 0153 1 |
| Booster for CPMI-2 D60 | CPMI-D60 | 6-31356 0090 1 |
Use the following sequence to reduce the risk of selecting an incorrect or incompatible valve configuration.
Confirm whether the installed valve is CPMI, CPMO or CPMI-D60.
CPMI controls upstream pressure, while CPMO controls downstream pressure.
Verify whether the installed version uses Inch, DIN or the listed 76.1 mm connection.
Match the Kvs rating exactly to the installed valve and process requirement.
All references listed on this page specify EPDM. Verify compatibility before ordering.
Use the complete official ordering reference rather than relying only on the valve name.
Constant pressure valves are commonly used in hygienic process systems requiring stable operating pressure and controlled flow conditions.
An OEM ordering reference should only be considered valid after comparison with the installed valve, equipment documentation and process requirements. Small differences in valve family, connection standard, Kvs value or accessory configuration can result in an incompatible selection.
The following answers address common questions about CPMI and CPMO valve operation, Kvs sizing, hygienic applications, connection standards, pressure adjustment, maintenance and replacement-part identification.
Constant pressure valves regulate process pressure through a direct balance between pneumatic actuator force and process pressure acting on the valve diaphragm and internal regulating components.
A constant pressure valve is a self-regulating hygienic valve that maintains a selected process pressure despite changes in flow demand. Pneumatic pressure acting on the diaphragm creates a mechanical setpoint force, while process pressure moves the valve plug until the forces reach equilibrium.
CPMI maintains pressure before the valve and is generally used for upstream or back-pressure control. CPMO maintains pressure after the valve and is generally used for downstream-pressure duties, such as supplying a filler at stable pressure.
The pressure setpoint is normally adjusted by changing the regulated air pressure supplied to the pneumatic actuator. Increasing the air pressure generally increases the process pressure setpoint, subject to the valve design and operating limits.
Standard constant pressure valves usually regulate through the direct balance of pneumatic and process forces and therefore do not require a conventional valve positioner for basic pressure regulation. Project-specific instrumentation may still be added for pressure monitoring or control-system integration.
Kvs represents the flow capacity of a fully open valve under standardized reference conditions. A higher Kvs allows more flow at the same pressure drop. A lower Kvs provides less flow capacity and may offer a more useful regulating range for small process flows.
No. Pipe size alone is insufficient. Valve selection should also consider minimum, normal and maximum flow, pressure drop, product density and viscosity, temperature, desired pressure setpoint, connection standard and required regulating range.
Not automatically. DIN and inch tube systems may have different outside diameters, wall thicknesses and weld-end dimensions even where their nominal sizes appear similar. The exact installed pipe standard and connection geometry must be verified.
Hygienic CPM valve configurations are intended for cleanable sanitary process systems. Actual CIP suitability depends on the valve generation, installation orientation, internal geometry, seal material, cleaning temperature, chemical concentration and required flow velocity.
Elastomer selection depends on the product, process temperature, cleaning chemicals, sterilization conditions and applicable hygienic requirements. Common options may include EPDM and FKM, but the correct grade must be confirmed for the actual duty.
Pressure fluctuation may result from incorrect Kvs sizing, unstable air supply, pulsating pump flow, excessive friction, worn seals, a damaged diaphragm, incorrect installation or a valve operating too close to the fully closed position.
Service intervals depend on operating hours, cycle frequency, product abrasiveness, temperature, CIP intensity and previous maintenance history. Critical seals and the actuator diaphragm should be inspected through a preventive-maintenance program rather than only after leakage or control failure.
Provide as much of the following information as possible:
These symptoms are useful starting points for inspection, but the installed valve and complete process conditions should be checked before replacing components or changing the pressure setting.
Check valve oversizing, pulsating process flow, air-regulator stability and friction in the stem or guide assembly.
Verify available air pressure, process flow demand, valve capacity, diaphragm condition and possible internal leakage.
Inspect product seals, stem seals, clamp condition, sealing surfaces and correct assembly of the hygienic body.
Check for undersized Kvs, incorrect flow direction, product deposits, damaged internals or insufficient valve opening.
Before changing pneumatic pressure, replacing a diaphragm, ordering a service kit or changing the valve size, confirm the model, pressure-control principle, flow direction, process duty, valve generation, connection dimensions and applicable manufacturer instructions.
LGN supports the identification and sourcing of hygienic CPM valves, service kits and replacement components for dairy, beverage, food, pharmaceutical and other sanitary processing applications.
For a new valve application, provide the required flow, upstream and downstream pressures, controlled pressure location, product properties, temperature, pneumatic supply and piping standard. For replacement valves or spare parts, include the complete model, nameplate, serial information, photographs and key dimensions.
The quality of a quotation depends on accurate technical identification. LGN evaluates the available information before proposing a valve, service kit or replacement component.
Review of valve model, size, pressure-control principle, nameplate information, connection dimensions and installed configuration.
Evaluation of flow, pressure, Kvs, temperature, product properties, pneumatic supply and hygienic process conditions.
Identification of compatible diaphragms, seals, elastomers, internal components and complete preventive-maintenance kits.
Support for valve internals, pneumatic parts, bonnet and clamp components, connection parts and installation accessories.
Constant pressure valves are widely used where stable process pressure, cleanable construction and hygienic product handling are required.
Where the valve designation or spare-part reference is incomplete, LGN may request additional photographs, dimensional measurements, process information or confirmation of the original equipment manufacturer’s article number before issuing a final quotation.
