Submittal Sheet
2
Materials
Check Valve Bodies: FDA epoxy coated cast iron
Seats: stainless steel
Trim: stainless steel
Relief Valve Body: 2
1
⁄2"-3" (60-80mm) Lead Free* bronze
4"-10" (100-250mm) FDA epoxy coated cast iron
Test Cocks: Lead Free* bronze body ball valve
Pressure — Temperature
Temperature Range: 33°F-110°F (0.5°C-43°C) continuous,
140°F (60°C) intermittent
Maximum Working Pressure: 175psi (12.06 bar)
Standards
AWWA C511-92
IAPMO PS 31, SBCCI (Standard Plumbing Code)
USC manual for Cross-Connection Control, 8th Edition
Capacity
*Typical maximum flow rate (7.5 feet/sec.)
2
1
⁄2" (65mm)
*
*
*
*
*
*
∆P 0 25 50 75 100 125 150 175 200 225 250 275 300 gpm
0 95 190 285 380 475 570 665 760 855 950 1045 1140 lpm
5 7.5 15 fps
1.5 2.3 4.6 mps
kPa psi
138 20
103 15
69 10
35 5
3" (80mm)
*
∆P 0 50 100 150 200 250 300 350 400 gpm
0 190 380 570 760 950 1140 1330 1520 lpm
5 7.5 15 fps
1.5 2.3 4.6 mps
kPa psi
138 20
103 15
69 10
35 5
4" (100mm)
*
∆P 0 100 200 300 400 500 600 gpm
0 380 760 1140 1520 1900 2280 lpm
5 7.5 10 15 fps
1.5 2.3 3.0 4.6 mps
kPa psi
138 20
103 15
69 10
35 5
6" (150mm)
*
∆P 0 200 400 600 800 1000 1200 1400 1600 gpm
0 760 1520 2280 3040 3800 4560 5320 6080 lpm
5 7.5 15 fps
1.5 2.3 4.6 mps
kPa psi
138 20
103 15
69 10
35 5
8" (200mm)
*
∆P 0 200 400 600 800 1000 1200 1400 1600 1800 2000 gpm
0 760 1520 2280 3040 3800 4560 5320 6080 6840 7600 lpm
5 7.5 10 fps
1.5 2.3 3.0 mps
kPa psi
138 20
103 15
69 10
35 5
10" (250mm)
*
∆P 0 500 1000 1500 2000 2500 3000 gpm
0 1900 3800 5700 7600 9500 11400 lpm
5 7.5 10 fps
1.5 2.3 3.0 mps
kPa psi
138 20
103 15
69 10
35 5
How It Operates
The unique relief valve construction incor-
porates two channels: one for air, one for
water. When the relief valve opens, as in
the accompanying air-in/water-out dia-
gram, the right-hand channel admits air
to the top of the reduced pressure zone,
relieving the zone vacuum. The channel
on the left then drains the zone to atmo-
sphere. Therefore, if both check valves
foul, and simultaneous negative supply
and positive backpressure develops, the
relief valve uses the air-in/
water-out principle to stop potential back-
flow.
Water Air
Out In
1013
B64.4
* The wetted surface of this product contacted by consumable
water contains less than one quarter of one percent (0.25%) of
lead by weight.
Approvals
Approved by the Foundation for Cross-Connection Control and Hydraulic
Research at the University of Southern California.