TOP VALVE Back Pressure Valves & Pressure Relief Valves
Designed To Enhance theAccuracy & SafetyOf Your Metering Pumps

Back Pressure Valves,Pressure Relief Valves,Top Valve,Back,Pressure,Relief,Valves,Top,ValveDescription

Back Pressure Valves and Pressure Relief Valves named Top Valve. A new line of diaphragm style, has been introduced by Primary Fluid Systems Inc. New features include a completely adjustable pressure range of 0-150 PSIG and a built-in air release to reduce priming difficulties with metering pumps. Top Valve Back Pressure Valves and Pressure Relief Valves are available in seven sizes, 1/4" through 2" NPT and eight (8) materials of wetted construction. The seat design of this new line of valves greatly extends the normal life expectancy of the diaphragm.

  • PVC, CPVC, PVDF, Teflon, polypropylene, stainless steel, Alloy 20, Hastelloy C

  • Back Pressure Valves,Pressure Relief Valves,Top Valve,Back,Pressure,Relief,Valves,Top,Valve Teflon laminated to EPDM backer diaphragm

  • Turn down handle limits pressure to 150 psig

  • Color coded handles indicate size at a glance

  • Rectangular shape with mounting ports

  • Built-in matching material gauge port plug (easily removed for gauge option)

  • Spring design provides consistent pressure adjustments through the range
    (0-150 PSIG)

  • Long life diaphragm

  • Range of 0 - 150 PSIG

  • Built-in optional, air release & gauge port

  • Available in 2 port off-line & 3 port in-line configurations

  • Available in: PVC, CPVC, PVDF, Teflon, Polypropylene, Stainless Steel, Alloy 20, Hastelloy C

  • 7 sizes (1/4" - 2" NPT)

  • Color coded handles indicate size at a glance

Note: CRN is available on certain valves. Please contact factory for price and availability.

Dimensional Information

Overall Dimensions
Inlet / Outlet
Press. Relief
In/Out Port
Relief Port
Size
A
B
C
D
E
F
NPT
NPT
1/4"
5.750
2.500
2.250
0.650
1.125
1.250
1/4"
1/4"
1/4" x 1/2" plastic
5.750
2.500
2.250
0.650
1.125
1.125
1/2"
1/2"
1/4" x 1/2" metal
5.750
2.500
2.250
0.650
1.125
1.125
1/2"
1/4"
1/2"
6.500
3.500
2.750
0.900
1.375
1.750
1/2"
1/2"
3/4"
6.500
3.500
2.750
0.900
1.375
1.750
3/4"
3/4"
1"
7.000
4.000
3.000
1.300
1.500
2.000
1"
1"
1 1/2"
7.750
4.125
3.250
1.687
1.625
2.063
1 1/2"
1"
2"
8.250
4.125
3.750
1.948
1.875
2.063
2"
1 1/2"


Back Pressure Valves,Pressure Relief Valves,Top Valve,Back,Pressure,Relief,Valves,Top,Valve Dimensions are approximate for overall height based on valve factory set at 50 PSIG

For pressure relief plastic body valves add 0.25" to dimensions
"A" and "D" except 1 1/2" size

Note: Dimensions are the same for standard back pressure and pressure relief valves except as indicated above.




Flow Rates

Flow capacity through TOP VALVE Back Pressure Valves/anti-siphon and Pressure Relief Valves under continuous flow conditions @ 50 PSIG with ambient temperature water.

Size
1/4"
1/4" / 1/2"
1/2"
3/4"
1"
1 1/2"
2"
Flow Rate USGPM
4
4
6
8
14
25
40


Note: Capacities will increase with pressure. If pressure is doubled, flow rate will approximately double. For capacities of valves with pulsating flow, use approximately 1/3 of the given flow rates.

Typical Installations

The installations below are typical installation examples only. Consult your engineering department for the appropriate installation of your application or call us for advice.

 

Back Pressure Valves,Pressure Relief Valves,Top Valve,Back,Pressure,Relief,Valves,Top,Valve Back Pressure Valves,Pressure Relief Valves,Top Valve,Back,Pressure,Relief,Valves,Top,Valve

Top Valve