Murphy Diesel Fuel Check Valves Prv70 User Manual

CKV-7867B/N  
Revised 11-04  
Catalog Section 55  
(00-02-0121)  
Diesel Fuel Check Valves  
CKV and PRV Series  
Problem Solvers for Diesel Engine  
Shutdown Systems  
Precision Made  
Stainless Steel Spring  
Compact and Simple to Install  
Description  
Specifications  
Materials  
Dimensions  
Murphy offers two types of diesel fuel line  
valves: check valves and pressure relief  
valves.  
CKV2336  
Body  
Seal Spring  
1-5/8 in. (41 mm)  
CKV2336  
Brass Poppet  
SS  
SS  
SS  
CKV1WPS  
Brass  
Brass  
SS  
SS  
The CKV series check valves are in-line,  
one-way valves that prevent fuel from being  
siphoned back into an injector or injection  
pump which could delay a shutdown.  
PRV50/PRV70  
Note: SS=Stainless steel.  
1/4 NPT  
There are two types of check valves:  
Opening Pressure  
CKV1WPS  
CKV2336 and CKV1WPS. The CKV2336  
has a 1/4 NPT threaded male connection on  
each end for connecting to fuel line fittings  
or hoses. The CKV1WPS check valve is typi-  
cally mounted in the fuel bypass line of the  
last fuel injector. The CKV1WPS features a  
hollow bolt connection and a barbed, 1/8  
NPT connection for flex hose or fitting.  
Opening  
1 psi (7)  
Fully Opened  
4 psi (27)  
2-1/4 in. (57 mm)  
CKV2336  
CKV1WPS  
PRV50  
1.4 psi (10)  
17 psi (117)  
10 psi (69)  
2 psi (14)  
25 psi (172)  
70 psi (483)  
21/64 in. (8 mm)  
diameter hollow  
bolt hole  
1/8 NPT  
Barbs for  
flexible hose  
PRV70  
Note: metric (kPa) equivalents in parenthesis.  
PRV50 and PRV70  
Static Pressure (all):  
1-1/2 in. (38 mm)  
The PRV series pressure relief valves,  
relieve overpressure in a fuel system usually  
caused by closing of a solenoid fuel valve.  
150 psi (1.03 MPa) maximum  
Weight  
CKV2336: 1.3 oz (40.5 grams)  
CKV1WPS: 1.3 oz (40.5 grams)  
PRV50/PRV70: 1.3 oz (40.5 grams)  
The PRV50 and PRV70 have a 1/4 NPT  
threaded connection on each end for con-  
necting to fuel line fittings or hoses.  
1/4 NPT  

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