Products / Relief Valves
 

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Relief Valve Documentation
Information Sheet (pdf)
 
Why Use Relief Valves? (pdf)
 
BOM & Specifications (pdf)
 
Instruction Manual (pdf)
 
 

 
   
Relief Valves  
   
  "Every Positive Displacement Pump Needs Relief"
 

Positive Displacement (PD) pumps should always be installed with a Relief Valve in the discharge line, to protect the pump and piping against any type of line blockage, including the inadvertent closing of an isolation valve. Liquiflo manufactures two sizes of relief valves in both 316 Stainless Steel and Alloy-C.

Ten standard Liquiflo Relief Valve models are available, based on the body material, the port size, and the pressure setting range (see chart below). Models RV1000, RV1001, RV2000 and RV2001 are factory preset to discharge at 100 PSI (7 bar) unless a different pressure setting is requested when ordering; other models are preset to the pressure setting specified when ordering.

 

Liquiflo Relief Valve basic material
is made of corrosion-resistant
316 Stainless Steel or Alloy-C

 

 
   
Specifications for Standard Liquiflo Relief Valves
 
Model #
Material
Port Size & Type
Pressure Setting (PSI)
Approx. Flow @ 25%
above Pressure Setting
Min
Max
GPM
LPM
 RV1000-LP
316 SS
½" NPT
25
65
7.5
28
 RV1000
316 SS
½" NPT
50
135
7.5
28
 RV1000-HP
316 SS
½" NPT
75
200
7.5
28
             

 RV1001-LP
Alloy-C
½" NPT
25
65
7.5
28
 RV1001
Alloy-C
½" NPT
50
135
7.5
28
 RV1001-HP
Alloy-C
½" NPT
75
200
7.5
28
             
 RV2000-LP
316 SS
1" NPT
25
75
25
95
 RV2000
316 SS
1" NPT
50
175
25
95
             
 RV2001-LP
Alloy-C
1" NPT
25
75
25
95
 RV2001
Alloy-C
1" NPT
50
175
25
95
   
   
 LP = Low Pressure  HP = High Pressure
   
   
 
Proper Relief Valve Hook-up: Relief valve should directly bypass the pump discharge line back to the supply tank, as shown below.
 
   

 
 
Products / Relief Valves