G04 Spool Position Monitored Directional Valve

Table of Content

Spool Position Monitored Directional Valve

HD-*-G04-P-D-P**

Description of Model

Code	Meaning	Options for this model
HD	Solenoid-controlled pilot-operated directional valve	HD
***	Spool type	Single solenoid 2B2, double solenoid 3C4
G04	Valve size	1/2" (DN16, ISO 4401-07 / D07)
P/*P	Pilot	P: internal pilot; *P: external pilot
D/*D	Drain	D: internal drain; *D: external drain
P	Position sensor	P (standard)
AC/DC/RF	Coil voltage	AC110 (50 Hz or 60 Hz), AC220 (50/60 Hz), DC12, DC24, RF110, RF220

G04 Specifications

Model (single solenoid)	HD-2B2-G04---P
Model (double solenoid)	HD-3C4-G04---P
Spool type	2B2 (single solenoid), 3C4 (double solenoid)
Pilot / drain	P: internal pilot, P: external pilot; D: internal drain, D: external drain
Mounting interface	ISO 4401-07 (D07)
Max. operating pressure	315 kgf/cm²
Max. flow	300 L/min
Pilot pressure	Max. 250 kgf/cm², min. 5 kgf/cm²
Max. allowable back pressure	External drain 210 kgf/cm², internal drain 140 kgf/cm²
Max. switching frequency	120 cycles/min (AC, DC, RF)
Sensor ambient temperature	0 to 50 °C

Max. flow, max. operating pressure and back pressure vary with the circuit.

Operation Principle

The built-in position switch monitors the spool position. When the solenoid is energized and the spool shifts to the set stroke point, output A opens and output B closes. If the spool does not reach that point, the switch does not change state.

The switch signal goes to a PLC or industrial computer, which uses it to control or drive hydraulic components and other machine motions.

Features

A. The series is available in 4 sizes: G02, G03, G04 and G06, for different flow requirements.

B. Protection class IP67, stainless steel housing.

C. Electronic Specification

Input Supply Voltage	18~24VDC(±10%)
Recommended Output Current per Channel	≦50mA
MAX Output Current per Channel	400mA
MAX Output Drop	≦6V
Switch Point Deviation	≦0.5mm
Ambient Temperature	0~50°C
Protection Class	IP67

D. Statement of Connector and wiring

HD-G04 spool position monitored directional valve wiring diagram with supply, output A/B and ground pins

VCC (18～24V DC), red wire.
Output B, White wire.
GND, Black wire.
Output A, Blue wire.
The shield wire connects to the housing.
This switch is dedicated to stroke-point monitoring.
When the trigger point is reached, output A (4 pin) non-conductive – normally closed.
Output B (2 pin) conductive-normally opened.
The switching point is adjusted by moving the outer tube on the inner tube or by the core thread, and is set at the factory before shipment.

Notes

When the position switch drives an inductive load, such as a motor or relay coil, opening the load circuit produces a high induced voltage that may damage the switch or shorten the valve life. A surge protection device is recommended.
Do not disassemble the valve body. Do not replace internal or external components. Do not replace or modify the internal throttle.
The position switch can only be set and checked by the manufacturer.
The hydraulic system must keep the spool free from shock and vibration.
Do not drop the valve onto a hard surface from higher than 30 cm; the built-in sensor may fail.
Keep the hydraulic oil clean; contamination shortens valve life or causes damage. Use filters with a filtration ratio of βx = 75 (x = 25 μm).
Use ISO VG32 or ISO VG46 hydraulic oil, or water-glycol fluid.