Control Valves & Safety Valves
Spring-Loaded Safety Relief Valve
Price:Quoted by size, pressure rating, body material and configuration
- Size rangeDN15 – DN300 (1/2″ – 12″)
- Pressure classASME Class 150 – 900 (PN 20 – PN 150)
- Body materialWCB / CF8 / CF8M
- Sealing surfaceMetal / soft seat
Our Products
The Spring-Loaded Safety Relief Valve uses spring preload to balance the medium pressure. When the system pressure exceeds the set pressure, the disc is lifted and the medium is discharged to relieve the pressure; the valve recloses automatically once the pressure falls to the reseating pressure. It is the final overpressure protection device for pressure vessels and piping systems.
Selection is based on set pressure and discharge capacity. Enclosed or open bonnets, metal or soft seats and a lifting lever for manual discharge and testing are available. The design follows ISO 4126 and API 520/526, and the valve is suitable for overpressure protection of steam, gas and liquid media.
Features
· Direct spring-loaded design, opens automatically on overpressure and reseats on pressure drop
· Selected by set pressure / discharge capacity to ISO 4126 / API 526
· Enclosed or open bonnet options
· Metal or soft seat options
· Lifting lever for manual discharge and testing
· Suitable for steam, gas and liquid media
Technical Specifications
Size range
DN15 – DN300 (1/2″ – 12″)
Pressure class
ASME Class 150 – 900 (PN 20 – PN 150)
Body material
WCB / CF8 / CF8M
Sealing surface
Metal / soft seat
Set pressure
Set to system requirement
Discharge type
Full lift / partial lift
End connection
RF/RTJ flange / threaded
Temperature range
−29 to +538 °C (depending on material)
Design standard
ISO 4126 / API 520 / API 526
Applications
For overpressure protection of boilers, pressure vessels, steam systems, gas storage tanks and process piping; the final safety relief device of pressurized systems.