Hydraulic proportional directional valve 4WRA 4WRAE 4WRE 4WREE 4WRZ 4WRZE 4WRK 4WRKE Series

The 4/2 and 4/3 proportional directional valves are designed as direct operated devices in plate design. Operation by means of proportional solenoids with central thread and detachable coil. The solenoids are controlled by external electronics.
Set-up:
The valve basically consists of:
Housing (1) with connection surface 
Control spool (2) with compression springs (3 and 4) and spring plates (5 and 6) 
Solenoids (7 and 8) with central thread 
Position transducer (9) 
Function:
With de-energized solenoids (7 and 8), central position of the control spool (2) due to compression springs (3 and 4) between the spring plates (5 and 6) 
Direct actuation of the control spool (2) by the control of one proportional solenoid, e. g. solenoid "b" (8) 
Control spool (2) is moved to the left in proportion to the electrical input signal •
Connection from P to A and B to T via orifice-type cross-sections with progressive •
Flow characteristics •
Switching off of the solenoid (8) 
Control spool (2) is returned to the central position by the compression spring (3) •
In the de-energized state, the control spool (2) is held in a mechanical central position by the return spring of the solenoids. With control spool symbol "V", this position does not correspond to the hydraulic central position! When the electric Valve control loop is closed, the control spool is positioned in the hydraulic central position.

Company Information
1.ZHENYUAN hydraulic equipment Co.,Ltd has more than 30years of experiments in manufacturing CNC
machines, and plastic injection moidingmachines.
2.ZHENYUAN company has quiet office enviroment and we have independent R&D ability.
3.ZHENYUAN commpany has efficient production department and strict quality control department to supply        good quality products all over the world.
Our Advantages
1.Be of long standing factory built in 1986;
2.usa professional engineer and with 5 utility models and 4 patents;
3.GRH OEM and with 370 professinal employees, 4workshops total 22000 square meters;
4.208 pcs mechanical and test equipments:
5.100% factory testing and inspection personnal in accordance with international standards for the high-frequency sampling,to ensure the quality of products manufactured;
6.Become TEREX,JOHN DEERE,HYDAC,AGCO,EATON,NEW HOLLAND,GARONER DENVER and MAHINDRA supplier. 

FAQ
Q:What Is Our Main Application?
A:1.Hydraulic system
   2.Agriculture machine
   3.Construction machina
   4.Automobile
   5.Local distributors
Q:What Is The Payment Terms?
A:Full order:30% as desposit, the balance before shipment:
   Small order /sample ordre: full payment in advance:
Q:Can I Mark My Own Brand On The Pump?
A:Yes. Full order can mark your brand and code.
Q:What Is Our Main Export Market?
A:Europe (41.7%):Italy,Germany,England,France,Holland,Greece,Spain,Portugal,Swissland,Finland,Czekh,Russia,Poland
   Asia(40.5%):China,Korea,Singapore,India,Turkey,Iran,Vietnam,Saudi Arabia,Syria,Isreal,Lebanon
Q:How Long Is Guarantee?
A:We give 1 year guarantee.