Hydraulic Pneumatic Valve Data: counterbalance
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) | size designation |
|---|---|---|---|---|---|---|---|---|---|---|
| counterbalance | NFPA_D03_10gpm_dP200 | 2.8 | 2.4 | 5 | 5,000 | 10 | Direct-acting counterbalance; set 125% of max load pressure; pilot ratio 3:1; internal leak at set | hydraulic_oil,water_glycol,phosphate_ester | 200 | NFPA_D03 |
| counterbalance | NFPA_D05_25gpm_dP200 | 5.6 | 4.8 | 10 | 5,000 | 25 | Pilot-operated counterbalance; set 10-4500 psi; pilot ratio 4.5:1; Cv measured at 200 psi dP | hydraulic_oil,water_glycol,phosphate_ester | 200 | NFPA_D05 |
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