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3603 series valves design specifications include:

- Sizes: 1”
- Differential Operating Pressure: 3-150 PSI (4.0-10.0 GPM); 4-150 PSID (11.0-19.0 GPM); 5-150 PSID (20.0-23.0 GPM)
- Flow Rates: 4.00, 4.50, 5.00, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00, 9.50, 10.0, 11.0,11.5, 12.0, 13.0, 14.0, 15.0, 16.0, 16.5, 17.0, 18.0, 19.0, 20.0, 21.0, 22.0, 23.0 GPM
- Flow Accuracy: +/- 10%
- Maximum Operating Temperature: 160°F
- Valves are marked with flow direction arrows, size and flow rate.
- Hydrostatic Tested @ 450 psi
- Service Kits Available
- Tested to Military standards

- Low Operating PSID replacement for 2352, 1” valve