Back
Pressure 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: 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
Back Pressure 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
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
|
2
|
2.5
|
5
|
6
|
11
|
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
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)
