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Back Pressure Valves
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Back Pressure Valves

Help stabilize the downstream pressure and deliver consistent flow

Back Pressure Valves ensure that certain types of pumps deliver consistent flows or allow for high accuracy and stable operation. Also known as loading valves or anti-siphon valves.
Model Size Maximum Flow
Pulsating
Maximum Flow
Continuous
Maximum Pressure
Inch Metric GPH LPH GPM LPM PSI BAR

M-Series Low Flow

1/4" DN 8 100 378 5 19 350 24
3/8" DN 10 200 757 10 37 350 24
1/2" DN 15 300 1,135 15 57 350 24
1/2" DN 15 260 984 15 57 150 10
3/4" DN 20 300 1,135 19 72 150 10
1" DN 25 500 1,890 26 98 150 10

G-Series Medium Flow

1/2" DN 15 320 1,211 17 63 350 24
3/4" DN 20 367 1,389 19 72 350 24
1" DN 25 462 1,748 24 90 350 24
1-1/2" DN 40 1,388 5,254 72 275 250 17
2" DN 50 1,533 5,803 80 302 250 17
3" DN 80 5,157 19,521 270 1,020 250 17
4" DN 100 5,157 19,521 270 1,020 250 17
1/2" DN 15 600 2,271 30 114 250 17
3/4" DN 20 600 2,271 30 114 250 17
1" DN 25 1,000 3,785 54 204 250 17
1 1/2" DN 40 5,157 19,521 270 1,020 250 17
2" DN 50 5,157 19,521 270 1,020 250 17
1/4" DN 8 250 946 13 49 800 55
3/8" DN 10 490 1,854 25 94 800 55
1/2" M-Series DN 15 700 2,649 36 136 800 55
1/2" G-Series DN 15 740 2,801 38 143 800 55
3/4" DN 20 850 3,217 44 166 800 55
1" DN 25 1,060 4,012 56 211 800 55
1/2" DN 15 320 1,211 17 63 350 24
3/4" DN 20 367 1,389 19 73 350 24
1" DN 25 462 1,749 24 92 350 24
Standard Materials
  • Polypropylene
  • PVC
  • CPVC
  • PVDF
  • PTFE
  • Halar®
  • 316L SS
  • Alloy 20
  • Hastelloy® C
Standard Connections
  • Threaded
  • Flanged
  • Union
  • Socket
Spring Ranges
  • 10 to 150 psi (1 to 10 bar) standard
  • 0 to 50 psi (0.0 to 3.5 bar)
  • 10 to 250 psi (1 to 17 bar)
  • 50 to 350 psi (3.5 to 25 bar)
Diaphragm Materials
  • EPDM/PTFE (standard)
  • FKM (Viton®)
  • CSM (Hypalon®)
  • PTFE/FKM
  • Kalrez®
Configurations
  • 180˚ ports (standard)
  • 90˚
  • Wall mount
Options
  • Priming port
  • Adjustment knob
  • Metal tops
  • Metal adjustment screw
  • Material certifications
Variations and Options Include:
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