DIRECTIONAL VALVES
HPD42-S51 HyPerformance
TM
Piloted 3-Way Spool
DESCRIPTION
A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve for
use in high pressure applications.
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.
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%.
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
ISO SYMBOL
PERFORMANCE
(Cartridge Only)
4.383.5
HYDRAFORCE
.com
®
3
2
1
4
5
6.9/100
8.3/120
9.6/140
11.0/160
12.4/180
5.5/80
4.1/60
2.8/40
1.4/20
38
10
76
20
114
30
151
40
FLOW lpm/gpm
PRESSURE DROP bar/psi
Pressure Drop vs. Flow
Neutral; Cartridge Only
3 to 2 - - - -; 3 to 4
—
3 to 2 and 4 — - — -
32 cSt/150 sus oil at 40°C
13.8/200
189
50
227
60
265
70
Blue rectangles are links to other catalog pages.
Cartridge: Weight: 1.9 kg. (4.2 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
PPDI Urethane seals and no
back-up rings standard.
Ported Body: Weight: 14.0 kg
(30.90 lbs) HyPerformance™ ductile
iron (code 'D') standard. Rated to
345 bar (5000 psi).
See page 8.042.1.
DIMENSIONS
MATERIALS TO ORDER
HPD42-S51
4.383.6
HPD42-S51 - __ __ __ - __ - __ __ __
Bias Spring
160 11 bar (160 psi)
®
HYDRAFORCE
HYDRAFORCE
.com
®
Seals
U PPDI Urethane
US PPDI Urethane with sealed spool
between ports 1 and 2
1.99
50.4
ACROSS FLATS
TORQUE:
290 to 310 ft-lbs
(394 to 420 Nm)
INCH
MILLIMETRE
2.72
69.0
5.71
3
145.0
2
1
4
5
ORIFICE DISC CANNOT
BE USED WITH THIS PRODUCT
due to HyPerformance
TM
Cavity.
Porting
Cartridge Only 0
SAE 20 20TD
1-1/4" BSP 10BD
Note: PPDI Urethane seals are recommended
for pressures over 241 bar (3500 psi).
Note: Consult factory for additional seal
options.
