Safety Valves
Industrial Safety Valves
Safety valves are designed to protect pressure vessels and process systems against overpressure. They automatically discharge excess pressure and help keep operations safe for steam, gases, and liquids. This page includes Type 441 (flanged, cast steel) and Type 483/488 (clamp, 316L) ranges.
Application
These valves are often used to protect stainless steel pressure vessels and connected process lines. A properly selected safety valve helps prevent unsafe pressure buildup and supports compliance with plant safety standards.
Features & Benefits
- Self drained body
- Full lift safety valve
- High capacity
- For steam, gases & liquids
- PED approval (other approvals available)
Selection checklist
- Media: steam / gas / liquid
- Set pressure (opening pressure) and required capacity
- Connection standard: flanges DIN (PN40/16) or clamp
- Material preference: cast steel vs 316L
- Bonnet type: open vs closed, and lever requirement
Safety valves — product tables
Ordering data below includes size configuration (DN1/DN2), dimensions and part numbers. If you need another opening pressure or approval, please contact us.
Type 441
Body material: Casted steel · Opening pressure: 3.2 bar · Connection: Flanges DIN (PN40/16) · Lifting device: Lever · Bonnet: Open bonnet
| Description | Denomination | DN1 | DN2 | a | b | H | Kg | Part No. |
|---|---|---|---|---|---|---|---|---|
| Type 441 | 4412.4513 DN25/40 3.2barg | 25 | 40 | 100 | 105 | 233 | 9 | 90503-7068 |
| Type 441 | 4412.4523 DN32/50 3.2barg | 32 | 50 | 110 | 115 | 325 | 12 | 90503-7069 |
| Type 441 | 4412.4533 DN40/65 3.2barg | 40 | 65 | 115 | 140 | 366 | 16 | 90503-7070 |
| Type 441 | 4412.4543 DN50/80 3.2barg | 50 | 80 | 120 | 150 | 413 | 22 | 90503-7071 |
| Type 441 | 4412.4553 DN65/100 3.2barg | 65 | 100 | 140 | 170 | 526 | 32 | 90503-7072 |
| Type 441 | 4412.4563 DN80/125 3.2barg | 80 | 125 | 160 | 195 | 603 | 56 | 90503-7073 |
Type 483 & 488
Body material: 316L · Opening pressure: 3.2 bar · Connection: Clamp · Lifting device: Lever · Bonnet: Closed bonnet · PED approval
| Description | Denomination | DN1 | DN2 | a | b | H | Kg | Part No. |
|---|---|---|---|---|---|---|---|---|
| Type 483 | 4834.7714 1.5/2 3.2barg | 1.5" | 2" | 67 | 36 | 259 | 3.7 | 90503-6712 |
| Type 488 | 4884.4884 2/3 3.2barg | 2" | 3" | 152 | 98 | 426 | 14 | 90511-9187 |
FAQ
Quick answers to common safety valve questions.
What is a full-lift safety valve?
A full-lift safety valve opens rapidly to a high lift, providing a high discharge capacity for fast pressure relief.
Open bonnet vs closed bonnet — which one should I choose?
Closed bonnet designs can provide additional protection from external conditions. Selection depends on site safety requirements and media.
What information do you need to propose the right safety valve?
Please share media, operating pressure, set pressure, temperature, required capacity, and connection standard (DIN flange or clamp).
Request a quotation & technical support
Send your process data and we will propose the correct safety valve selection.
We’ll propose the correct valve type, size, and configuration.
Please send: media (steam/gas/liquid), operating pressure, set pressure (opening pressure), temperature, required capacity, and connection preference (DIN flanges PN40/16 or clamp).