Dofluid Pneumatic & Hydraulic Co.,Ltd.Valve

Dofluid Pneumatic & Hydraulic Co.,Ltd.

Dofluid has been manufacturing solenoid directional valves, proportional pressure/flow valves and extra quick response electro-hydraulic flow control valves since 1976 . No.1 maker in Taiwan for domestic sales  and worldwide exports with international quality approval: CE, ISO9001 & CSA-C/US.

Extra Quick Response Type Proportional Directional Control Valves
  Products  Proportional Directional Control V...
Extra Quick Response Type Proportional  Directional Control Valves
Extra Quick Response Type Proportional Directional Control Valves
DPGEE-6/10 (with position control)
Technical Data
Performance Curve
Dimensions / Baseplate

Direct operated proportional directional valve with electrical position feedback and integrated electronics (OBE) for type DPGEE
Closed loop control of the direction and size of a flow
Operation is by proportional solenoids with a central thread and removable coil
For subplate mounting:
Porting pattern to ISO 4401,
subplates to catalogue sheets (separate order)
Spring centred control spool
Control electronics
DPGEE
- integrated electronics (OBE) with voltage input or current input (A1 resp. B1)






Proportional directional valves without integrated electronics
Type DPGEE-3C2; DPGEE-3C40
Type DPGEE-2B2B; DPGEE-2B40B
 

Extra Quick Response Type Proportional Pressure Relief Valve
  Products  Proportional Pressure Relief Valve...
Extra Quick Response Type Proportional  Pressure Relief Valve
Extra Quick Response Type Proportional Pressure Relief Valve
PPGEE-6 (with position control)
Technical Data
Performance Curve
Dimensions / Baseplate

Directly operated valves with position feedback and on-board electronics for limiting system pressure
Adjustable through the position of the armature against the compression spring
Position-controlled, minimal hysteresis < 0.2 %, rapid response times, see Technical data
Pressure limitation to a safe level even with faulty electronics (solenoid current I > Imax )
Control electronics
PPGEE
- integrated electronics (OBE) with voltage input or current input (A1 resp. B1)



General
Type PPGEE proportional pressure relief valves are remote-controlled (pilot) valves in conical seat design.
They are used to limit system pressure.
The valves are actuated by means of a proportional solenoid with on-board electronics.
With these valves, rapid response times with low hysteresis can be achieved.

Basic principle
To adjust the system pressure, a setpoint is set in the trigger electronics. Based on this setpoint, the electronics control the position of the armature on the conical seat and on the compression spring.
The position control ensures extremely low hysteresis. The magnetic force determines the spring force until a new position is reached.
Pressure limitation for maximum safety
If a fault occurs in the electronics, so that the solenoid current (I) would exceed its specified level in an uncontrolled manner, the pressure cannot rise above the level determined by the maximum spring force.







For on-board electronics