DIRECTIONAL VALVES
PD42-S50 Piloted 3-Way Spool
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-S50 allows fl ow from ➂ to ➁ bidirectionally, while fl ow
is blocked at
➃.
On remote pilot signal at
➀, the valve shifts to open ➂ to ➃ while blocking ➁.
The spring chamber is vented to the tank through port
➄, which is common to the
spring chamber. Pressure on port
➄ will directly (1:1) affect the pilot pressure required
and must be added to the bias spring value.
FEATURES
• Hardened spool and cage for long life.
• Optional open transition (ports
➁, ➂ and ➃).
RATINGS
Maximum Operating Pressure: 345 bar (5000 psi)
Flow: See Performance Chart
Internal Leakage: 245 ml/minute (15 cu. in./minute) at 345 bar (5000 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-S5; See page 9.142.1
Cavity Tool: CT42-S5; See page 8.600.1
Seal Kit: SK42-S5X-BMMM; See page 8.650.1
SYMBOL
4.373.1
PERFORMANCE (Cartridge Only)
13.8/200
10.3/150
6.9/100
3.4/50
38
10
76
20
189
50
151
40
114
30
FLOW lpm/gpm
PRESSURE DROP bar/psi
to or to
32 cSt/150 sus oil at 40nC
227
60
265
70
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
Cartridge: Weight: 1.60 kg. (3.5 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
DIMENSIONS
MATERIALS TO ORDER
PD42-S50
4.373.2
PD42-S50- __ - __ - __ __ - __ __ __
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*
Porting
Cartridge Only 0
®
HYDRAFORCE
HYDRAFORCE
.com
®
with Vented Spring Chamber
MILLIMETRE
INCH
1.88
47.6
3.22
81.8
4.78
121.5
ACROSS
FLATS
TORQUE
65–75 ft-lbs
(88.1–101.7 Nm)
Bias Spring
100 6.9 bar (100 psi)
190 13.1 bar (190 psi)
Option
Open Transition N
(ports
➁, ➂ and ➃)
* Required for pressure over 241 bar (3500 psi)
Blue rectangles are links to other catalog pages.
