Hydraulic Pneumatic Valve Data: servo
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| servo | NFPA_D03_6gpm_dP1000 | 0.6 | 0.52 | 100 | 0.5 | 400 | 3,000 | 6 | 2-stage servo valve; 63 cc/min rated flow at 1000 psi dP; ±0.5% hysteresis; Moog D633 class | hydraulic_oil | 1,000 | 7 | NFPA_D03 |
| servo | NFPA_D05_16gpm_dP1000 | 1.6 | 1.38 | 80 | 0.3 | 600 | 3,000 | 16 | D05 2-stage electrohydraulic servo; 10 lpm at 70 bar rated; frequency response -3 dB ~80 Hz at 25% amplitude | hydraulic_oil | 1,000 | 10 | NFPA_D05 |
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