The Type LR128 pilot-operated, pressure relief valve or backpressure regulator is designed for liquid applications. The Type LR128 provides smooth operation, tight shutoff, and long life. Its internally actuated metal plug eliminates disadvantages associated with flexible element style regulators, and the specially engineered flow path deflects debris, protecting the seat from damage and erosion. An internal inlet strainer prevents large particles from entering the main valve.
Features
Debris Protection
Thorough Laboratory Testing
In-Service Travel Indicator
Easily Maintained Pilot
Specifications
Pressure Registration
External
Temperature Capabilities
17E68 Nitrile (NBR):-20 to 150°F / -29 to 66℃ | 17E97 Nitrile (NBR): 0 to 150°F / -18 to 66℃ | 17E88 Fluorocarbon (FKM): 0 to 250°F/ -18 to 121℃
Body Sizes
NPS 1 / 2 / 3 / 4 | DN 25 / 50 / 80 / 100
End Connections
NPT / SWE / CL150RF / CL300RF / CL600RF / PN 16/25/40
Maximum Inlet Pressure
450 PSIG / 31 bar | Or body rating limit, whichever is lower
Maximum Outlet Pressure
450 PSIG / 31 bar | Or body rating limit, whichever is lower
Spring Ranges
25 to 375 PSIG / 1.7 to 25.9 bar
