The Type 3900 modular pilot-operated safety relief valve (MPV) features a separate, non-flowing pilot sub-assembly design making it well-suitable for use with both compressible and incompressible fluids.
Optional pilot valve constructions offer either pop action or modulating action functionality to meet various pressure range, seat tightness, and blowdown requirements.
Highly versatile, this valve technology offers ease of maintenance, high reliability, flexibility, and efficient operation and performance.
Inlet Sizes: 1″ through 12″
Inlet Ratings: ASME Class 150 through 2500
Outlet Sizes: 2″ through 16″
Outlet Ratings: ASME Class 150 and 300
Orifice Sizes: Fourteen sizes – D through T (Full bores)
Set Pressure Range: Full Bores 15 to 6250 psig (1 to 431 barg)
Temperature Range: -40°F to 505°F (-40°C to 263°C)
Above 505°F with heat exchanger
Materials: Stainless steel pilot with carbon steel main valve and stainless steel trim
- ASME B&PVC Section VIII
- China Manufacturing License (CML)
- API 520, 521 and 526
- Others available upon request