Description
Back
pressure valves named Top Valve are a new line of diaphragm
style, which have 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.
Back pressure 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 greatly extends the normal
life expectancy of the diaphragm.
Features
•
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 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
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
a plastic body add 0.25" to dimensions
"A" and "D" except 1 1/2" size
Note:
Dimensions are the same for standard Top Valve except as indicated
above.
Flow Rates
Flow capacity through Top Valve 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 it is doubled,
flow rate will approximately double. For capacities of Top
Valve 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 Primary Fluid Systems Inc. for
advice.
(Click
on picture to enlarge)
(Click on
picture to enlarge)
