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Quick Reference Cartridge Valves Technical Information Pilot operated check valves Quick reference Description Flow* Pilot Operated Check Valve, 12 l/min Pilot to Open [3 US gal/min] 25 l/min [7 US gal/min] 30 l/min [8 US gal/min] 70 l/min [18 US gal/min] Description Flow* Pilot Operated Check Valve, 20 l/min Reverse Pilot to Open [5 US gal/min] SDC10-3S 45 l/min [12 US gal/min] CP12-3S 95 l/min [25 US gal/min] SDC16-3S 130 l/min [34 US gal/min] CP20-3S 230 l/min [61 US gal/min] Pilot to Open Drain Description Flow* Pilot Operated Check Valve, 30 l/min Pilot-to-open with drain [8 US gal/min] * Flow ratings are based on a pressure drop of 7 bar [100 psi] unless otherwise noted. They are for comparison purposes only. 520L0588 • Rev DB • November 2010 Quick reference Pilot operated check valves

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Quick reference Symbol Description Flow* Pressure Pilot Operated Check Valve, 250 l/min 350 bar Reverse Pilot-to-open with [66 US gal/min] [5000 psi] vent Description Flow* Pressure Pilot Operated Check Valve, 45 l/min 210 bar Pilot to Close [12 US gal/min] [3000 psi] Cavity none 115 l/min [30 US gal/min] 190 l/min [50 US gal/min] Description Flow* Pressure Pilot Operated Check Valve, 85 l/min 210 bar Catalog HIC [22 US gal/min] [3000 psi] Quick reference Pilot operated check valves Dual Pilot-Operated Checks...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Application notes Motion control valves, also referred to as load holding valves, are used to control the motion of a load in the following ways: · Prevent a load from dropping in case of hose or tube failure. Prevent a load from drifting caused by directional control valve spool leakage. Provide smooth, modulated motion when the load is in a lowering or run-away mode. Provide smooth, modulated motion when the directional control valve is suddenly closed. There are two basic types of motion control valves:...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Application notes PILOT-OPERATED CHECK VALVES Pilot-operated, or pilot-to-open check valves will positively hold a pressurized load and will release the load upon application of a pressure signal to the pilot port. Pilot-operated check valves are available as individual cartridges, standard Cartridge-In-Body (CIB) packages, or can be created in custom manifolds by using a standard check valve such as CV10-NP with a guided pilot piston. For more information on pilot pistons, see Accessories. Individual...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Application notes The pressure required to pilot open the check valve can be calculated by: P = W + (Pc • Ab) cylinder retracts (Ab • R) - Ar P = W + (Pc • Ar) cylinder extends (Ar • R) - Ab W = Load Pc = Check valve crack pressure (typically 0.34-4.5 bar [5-65 psi]; consult catalog sheets for details) Ab = Cylinder bore area Ar = Cylinder rod area R = Check valve pilot ratio (typically 3:1 or 4:1; consult catalog sheets for details) Note that these equations are idealized and do not consider any backpressure...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Pilot to Open RPC 04 OPERATION This is a pilot-to-open check valve. pressure drop 26 cSt [125 SUS] hyd.oil @ 20° C [68° F] Rated pressure 210 bar [3000 psi] Rated flow at 7 bar 12 l/min [3 US gal/min] [100 psi] Weight 0.06 kg [0.13 lb] Pilot ratio 3.2:1 Cavity NCS04/3 Note: A piston seal requires a 4.5 bar [65 psi] or greater return spring. Pilot operated check valves Cross-sectional view ORDERING INFORMATION RPC 04 - 2.5 - OR - 00 - V Pressure to open 0.5 = 0.5 bar [7 psi] 2.5 = 2.5 bar [36 psi] 5.0 = 5 bar...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Pilot to Open RPC 06 OPERATION This is a pilot-to-open check valve. Theoretical performance Rated pressure 315 bar [4500 psi] Rated flow at 7 bar 25 l/min [7 US gal/min] [100 psi] Weight 0.10 kg [0.22 lb] Pilot ratio 3.4:1 Cavity NCS06/3 Note: A piston seal requires a 4.5 bar [65 psi] or greater return spring. Pilot operated check valves Cross-sectional view ORDERING INFORMATION RPC 06 - 5 - OR - 00 - V Pressure to open 0.5 = 0.5 bar [7 psi] 5 = 5 bar [73 psi] Piston seals OR = Seals Omit = No seals Seals V =...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Pilot to Open CP450-1 OPERATION This valve is a pilot-to-open check valve. Theoretical performance Rated pressure 240 bar [3480 psi] Rated flow at 7 bar 30 l/min [8 US gal/min] [100 psi] Leakage 6 drops/min @ Rated pressure Weight 0.09 kg [0.20 lb] Pilot ratio 3.0:1 Cavity SDC10-3 Note: A piston seal requires a 4.5 bar [65 psi] or greater return spring. Pressure drop free flow pilot open Pilot operated check valves Cross-sectional view ORDERING INFORMATION CP450 - 1 - B - 8S - 015 - 0 Seals B = Buna-N V =...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Pilot to Open RPC 12 OPERATION This is a pilot-to-open check valve. Rated pressure 315 bar [4500 psi] Rated flow at 7 bar 70 l/min [18 US gal/min] [100 psi] Weight 0.20 kg [0.44 lb] Pilot ratio 2.8:1 Cavity NCS12/3 Note: A piston seal requires a 4.5 bar [65 psi] or greater return spring. Pilot operated check valves Cross-sectional view ORDERING INFORMATION RPC 12 - 5 - OR - 00 - V Pressure to open 0.5 = 0.5 bar [7 psi] 5 = 5 bar [73 psi] Piston seals OR = Seals Omit = No seals Seals V = Viton Omit = Buna-N...

Quick Reference Cartridge Valves Technical Information Pilot operated check valves Pilot to Open CP458-2 OPERATION This valve is a pilot-to-open check valve. Theoretical performance Rated pressure 210 bar [3000 psi] Rated flow at 7 bar 20 l/min [5 US gal/min] [100 psi] Leakage 6 drops/min @ Rated pressure Weight 0.07 kg [0.15 lb] Pilot ratio 2.8:1 Cavity SDC08-3 Note: A piston seal requires a 4.5 bar [65 psi] or greater return spring. Pressure drop pilot open Pilot operated check valves Cross-sectional view ORDERING INFORMATION CP458 - 2 - B - 6S - 065 - 0 Seals B = Buna-N V = Viton Housing...