Consolidated™ 4900 MPV Series POSRV from Baker Hughes
The Type 4900 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. 

4900 MPV Key Features and Benefits:
Modular design is easy to install, operate, and maintain.
Tubing and fittings are eliminated for simple assembly and disassembly, in addition to fewer leak paths.
Streamlined design addresses issues of tubing damage potentially caused by harsh environments and rough use.
Top-entry design offers easy access to the main valve components for reduced maintenance and operating costs.
Consolidated™ 4900 MPV Specifications:
Inlet Sizes

1" to 8" flanged
Inlet Ratings

ASME Class 150 to 2500 ​​​​​​
Outlet Sizes

2" through 10" flanged
Outlet Ratings

ASME Class 150 to 300
Orifice Sizes

D through T, Full Bores
Set Pressure Range

15 psig to 7200 psig
Temperature Range

-40°F to 505°F
Materials

Stainless steel pilot with carbon steel main valve and stainless steel trim. Other materials available
Standards and Regulations

ASME B & PVC, Section VIII
Pressure Equipment Directive