HPD42-S51 HyPerformance (HPD42-S51)

A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve for use in high pressure applications.

Product Operation

When in neutral the HPD42-S51 allows flow between ports 2, 3 and 4. On remote pilot signal at 1, the valve’s spool shifts to block all ports. The spring chamber is vented to the tank through port 5. The vented spring chamber allows the valve to be fully pressurized at ports 1, 2, 3, and 4 without affecting required pilot pressure. Pressure at port 5 will increase the required pilot pressure at a 1:1 ratio.

Product Features


Hardened spool and cage for long life.• All HyPerformance™ products are tested to the rigorous standards of the NFPA specification T2.6.1.• All HyPerformance™ valves are tested at a verification level of 90% and an assurance of 99%.

Product Ratings

Operating Pressure: 350 bar (5075 psi); 10% cycle life: 420 bar (6090 psi)Note: All HyPerformance products are tested for 900K cycles at 350 bar and 100K at 420 bar.
Proof Pressure: 690 bar (10000 psi)
Burst Pressure: 1380 bar (20000 psi)
Flow: With PPDI urethane seals up to 265 lpm (70 gpm) with no flow restrictions. With seal option US (PPDI urethane with sealed spool between ports 1 and 2) up to 246 lpm (65 gpm) with flow restrictions from ports 2-3 and 3-4 up to 114 lpm (30 gpm).
Internal Leakage: Ports 3-4: 328 ml/minute (20 cu. in./minute) at 350 bar (5075 psi) Ports 3-2: 492 ml/minute (30 cu. in./minute) at 350 bar (5075 psi)
Cycle Life: One million cycles.
Operating Temperature: -54 to 107°C (-65 to 225°F) with PPDI urethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: HVC42-S5; See page 9.142.1
Cavity Tool: HCT42-5XX; See page 8.600.1
Seal Kit: HSK42-S5U-0000 (Urethane); See page 8.650.1

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