Hydraulic Pneumatic Valve Data: proportional
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) | frequency response Hz | hysteresis pct (%) | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| proportional | NFPA_D03_10gpm_dP100 | 3.2 | 2.8 | 60 | 3 | 200 | 3,000 | 10 | Proportional directional; on-board electronics; ±3% hysteresis; 60 Hz at -3dB; step response 25 ms | hydraulic_oil | 100 | 25 | NFPA_D03 |
| proportional | NFPA_D05_25gpm_dP100 | 7.9 | 6.8 | 50 | 3 | 400 | 4,500 | 25 | D05 proportional; LVDT position feedback; ±3% hysteresis; 50 Hz -3dB; 30 ms step response | hydraulic_oil | 100 | 30 | NFPA_D05 |
| proportional | NFPA_D07_60gpm_dP100 | 19 | 16.4 | 40 | 3 | 600 | 4,600 | 60 | D07 pilot-operated proportional; rated 80 gpm; 40 Hz -3dB; step response 40 ms; large industrial drives | hydraulic_oil | 100 | 40 | NFPA_D07 |
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