Hydraulic Pneumatic Valve Data: directional_spool
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| directional_spool | NFPA_D03_10gpm_dP100 | 3.2 | 2.8 | 5 | 3,000 | 10 | D03 pilot-operated; higher dP variant; 5000 psi versions available from Parker D3W series | hydraulic_oil,water_glycol,phosphate_ester | 100 | 30 | NFPA_D03 |
| directional_spool | NFPA_D03_10gpm_dP75 | 3.6 | 3.1 | 5 | 3,000 | 10 | D03 (NG6) solenoid; nom. 8-15 gpm; Cv per Crane TP-410 at 75 psi dP; 4-way 4-position spool | hydraulic_oil,water_glycol,phosphate_ester | 75 | 50 | NFPA_D03 |
| directional_spool | NFPA_D05_20gpm_dP75 | 7.3 | 6.3 | 8 | 4,500 | 20 | D05 (NG10) solenoid; nom. 20-40 gpm; typical 4/3 center closed spool | hydraulic_oil,water_glycol,phosphate_ester | 75 | 60 | NFPA_D05 |
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