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.

Nine standard Liquiflo Relief Valve models are available, based on the body material, the port size and the pressure setting range (see chart below). The relief valves are factory preset to discharge at the pressures shown in the chart. Different pressure settings (within the Pressure Setting Range) can be 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)
Factory Setting
Approx. Flow @ 25%
above Pressure Setting
Min
Max
PSI
GPM
LPM
 RV1000-LP
316 SS
½" NPT
25
65
45
7.5
28
 RV1000
316 SS
½" NPT
50
135
100
7.5
28
 RV1000-HP
316 SS
½" NPT
75
200
135
7.5
28
               

 RV1001-LP

Alloy-C
½" NPT
25
65
45
7.5
28
 RV1001
Alloy-C
½" NPT
50
135
100
7.5
28
 RV1001-HP
Alloy-C
½" NPT
75
200
135
7.5
28
               
 RV2000-LP
316 SS
1" NPT
25
75
50
25
95
 RV2000
316 SS
1" NPT
50
175
100
25
95
               
 RV2001
Alloy-C
1" NPT
50
175
100
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. This is to ensure that the pump will not overheat if left running in a relieved condition.
 
   

 

 
Products / Relief Valves