Back Pressure Valves & Pressure Relief Valves
TOP VALVE
Designed To Enhance the
Accuracy
&
Safety
Of Your Metering Pumps
Back Pressure Valves & Pressure Relief Valves TOP VALVE
Description
 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
• 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.
Back Pressure Valves & Pressure Relief Valves TOP VALVE
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"
|
 •
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.
Back Pressure Valves & Pressure Relief Valves TOP VALVE
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.
Back Pressure Valves & Pressure Relief Valves TOP VALVE
Typical Installations
The installations below are typical installation examples only. Consult your engineering department for the appropriate installation of your application or call Primary Fluid Systems Inc. for advice.
(Click on picture to enlarge)
(Click on picture to enlarge)
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