DIRECTIONAL VALVES
PD42-M40 Piloted 3-Way Spool, External Vent
DESCRIPTION
A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve for
three-way circuits requiring remote pilot actuation.
OPERATION
In neutral (unpiloted), the PD42-M40 allows fl ow passage from ➂ to ➁ bidirectionally,
while fl ow is blocked at
➃. V is a spring chamber vent-to-atmosphere, which is
internally O-ring sealed from the cartridge fl ow paths.
On remote pilot signal at
➀, the valve shifts to open from ➂ to ➃, while blocking
fl ow at
➁.
The vented spring chamber allows PD42-M40 to be fully pressurized at any port
without affecting required pilot pressure.
FEATURES
• Hardened spool and cage for long life.
• Optional sealed pilot.
• Industry-standard ISO cavity.
RATINGS
Operating Pressure: 344 bar (5000 psi) with polyurethane seals
Flow: See Performance Chart
Internal Leakage: 246 cc/minute (15 cu. in./minute) max. at 344 bar (5000 psi)
Pilot Pressure Required:
To Spool Crossover: 11.6 bar (172 psi)
To Full Spool Shift: 17 bar (245 psi)
Temperature: -40 to 120°C with standard Buna 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: VC42-M4; See page 9.142.1
Cavity Tool: CT42-M4XX; See page 8.600.1
Seal Kit: SK42-4X-MMM; See page 8.650.1
Cap Vent Seal: 6003125
USASI:
ISO:
SYMBOLS
PERFORMANCE (Cartridge Only)
4.343.1
13.8/200
10.3/150
6.9/100
3.4/50
37.8
10
75.7
20
113.6
30
151.4
40
FLOW lpm/gpm
PRESSURE DROP bar/psi
189.3
50
227.1
60
265.0
70
to or to
32 cSt/150 ssu oil at 40°C
➂➂➃➁
Note: This valve is designed with a dynamic oil-to-atmosphere seal in the
vent section. Ambient conditions will cause this vent seal to degrade which
will reduce the valve’s cycle life. If this could cause a problem, we suggest
that a non-vented model be selected. Consult factory for assistance.
HYDRAFORCE
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Cartridge: Weight: 0.52 kg. (1.15 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
2.8 kg. (6.2 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.042.1
DIMENSIONS
MATERIALS TO ORDER
PD42-M40
4.343.2
PD42-M40__ - __ __ __ - __ -160
†
Option
None
(Blank)
Open Transition N
Seals
N Buna N (Std.)
NS Buna N with Sealed Spool
V Fluorocarbon
VS Fluorocarbon with Sealed Spool
P Polyurethane**
PS Polyurethane with Sealed Spool**
†
160 psi bias spring standard.
Optional bias springs considered on
OEM request.
2.93
74.4
2.22
56.3
4.43
112.5
3.90
99.0
4.77
3
121.1
INCH
MILLIMETRE
2
1
4
1.88
ACROSS
M42 x 2.0
- 6g THREAD
FLATS
TORQUE -
70 ft-lbs
(94.6 Nm) max.
47.6
3
2
4
6.00
152.4
5.38
136.7
2.64
67.1
0.25
6.4
3.93
99.8
0.34
8.6
1.34
34.0
3.94
100.1
1
Porting
Cartridge Only 0
SAE 16, SAE 6 Pilot 16T
*SAE 16, SAE 6 Pilot 16TD
SAE 20, SAE 6 Pilot 20T
Note: All bodies are PD type.
*Ductile iron body for pressures
over 207 bar/3000 psi
**Required for pressures over 3500 psi
®
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