Hydraulic Pneumatic Valve Data: pressure_reducing
Flow coefficients and performance data for hydraulic and pneumatic directional, pressure, and flow control valves — NFPA D03 through D10 body sizes and pneumatic 1/8" to 1" NPT port sizes. Covers Cv, Kv, nominal flow, pressure drop, leakage, response time, hysteresis, and frequency response.
| valve type | size flow key | Cv flow coefficient (gpm/psi^0.5) | Kv metric (m3/hr/bar^0.5) | leakage rate cc per min (cc/min) | max pressure psi (psi) | nominal flow gpm (gpm) | notes | operating fluid | pressure drop at rated flow psi (psi) | response time ms (ms) | size designation |
|---|---|---|---|---|---|---|---|---|---|---|---|
| pressure_reducing | NFPA_D03_10gpm_dP50 | 4.5 | 3.9 | 30 | 3,000 | 10 | Direct-acting reducing valve; downstream set 50-2000 psi; Cv varies with opening | hydraulic_oil,water_glycol,phosphate_ester | 50 | 40 | NFPA_D03 |
| pressure_reducing | NFPA_D05_25gpm_dP50 | 9 | 7.8 | 50 | 4,500 | 25 | Pilot-operated pressure reducing; set 75-3000 psi; integral check for reverse free flow | hydraulic_oil,water_glycol,phosphate_ester | 50 | 50 | NFPA_D05 |
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