SYMBOL:
 |
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-M42 allows flow between 3 and 2 while blocking at 4.
On remote pilot signal at 1, the valve shifts to allow flow between 3 and 4 while blocking at 2.
Since 4 is common to the spring chamber, pressure on 4 will directly (1:1) affect the pilot pressure required, and must always be added to the bias spring value.
Note: Consult factory for applications where bi-directional flow is required when the valve is in the normal or spring-offset position.
FEATURES
• Hardened spool and cage for long life.
• Optional sealed pilot
• Industry-common ISO cavity.
RATINGS
Operating Pressure: with Polyurethane seals: Ports 1, 2, & 3: 345 bar (5000 psi);
Port 4: 210 bar (3000 psi)
Flow: up to 265 lpm (70 gpm)
Internal Leakage at maximum operating pressure at all ports: 246 cc/minute (15 cu. in./minute);
With the sealed pilot there is no leakage at maximum operating pressure
Pilot Pressure Required:
To Begin Spool Movement: 11.9 bar (172 psi)
To Bring Spool to Cross-Over Point: 14.5 bar (210 psi)
To Fully Shift the Spool: 17 bar (245 psi)
Oil Volume Required to Full Shift: 2.5 cc (0.15 cu. in.)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
-26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
-54 to 107°C (-65°F to 225°F) with Polyurethane 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_4w
Cavity Tool: CT42-M4xx; See page 8.600.1
Seal Kit: SK42-4x-MMM; See page 8.650.1 |
