The type 4WREE6-3X valve is a direct operated proportional directional valve with electrical position feedback and integrated electronics (OBE). 4WREE6-3X type proportional valves have passed CE certification. Maximum operating pressure is up to 350 bar. It is one of Huade Hydraulic’s leading products. This 4WREE6-3X valve has stable performance and relative cheap price.
| General | ||
| Weight | ▶ Valve with two solenoids (kg) | 2.6 |
| ▶ Valve with one solenoid (kg) | 2.1 | |
| Installation position | any, preferably horizontal | |
| Ambient temperature range (℃) | -20 … +60 | |
| Storage temperature range with UV protection (℃) | +5 … +40 | |
| Transport temperature (℃) | –30 … +80 | |
| Maximum storage time (Years) | 1 | |
| Sine test according to DIN EN 60068-2-6 | 10 ... 2000 Hz / maximum of 10 g / 10 cycles / 3 axes | |
| Noise test according to DIN EN 60068-2-64 | 20 ... 2000 Hz / 10 g RMS / 30 g peak / 30 min. / 3 axes | |
| Transport shock according to DIN EN 60068-2-27 | 15 g / 11 ms / 3 shocks / 3 axes | |
| Shock according to DIN EN 60068-2-27 | 15 g / 11 ms / 1000 shocks / 3 axes | |
| Maximum relative humidity (no condensation) % | 95 | |
| Maximum solenoid surface temperature (℃) | 150 (individual operation) | |
| MTTFd value according to EN ISO 13849 (Years) | 150 | |
| Conformity | ▶ CE according to EMC directive 2014/30/EU, tested according to EN 61000-6-2 and EN 61000-6-3 ▶ RoHS directive 2015/65/EU ▶ REACH ordinance (EC) no. 1907/2006 | |
| Environmental compatibility | ▶ Climate | Environmental audit according to EN 60068-2 |
| hydraulic | ||
| Maximum operating pressure | ▶ Port A, B, P bar | 350 |
| ▶ Port T bar | 210 | |
| Maximum flow (recommended) (L/min) | 80 | |
| Rated flow (∆p = 10 bar) (L/min) | 4; 8; 16; 32 | |
| Hydraulic fluid | see table page 15 | |
| Hydraulic fluid temperature range(℃) | ▶ admissible | –20 … +70 |
| ▶ recommended | –40 … +50 | |
| Viscosity range (mm2/s) | ▶ admissible ℃ | 20 … 380 |
| ▶ recommended | 30 … 46 | |
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) | class 20/18/15 | |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | |
| Mineral oils | HL, HLP, HLPD, HVLP, HVLPD | NBR, FKM | DIN 51524 | |
| Bio-degradable | ▶ Insoluble in water | HETG | FKM | ISO 15380 |
| HEES | FKM | |||
| ▶ Soluble in water | HEPG | FKM | ISO 15380 | |
| Flame-resistant | ▶ Water-free | HFDU (glycol base) | FKM | ISO 12922 |
| HFDU (ester base) | FKM | |||
| HFDR | FKM | |||
| ▶ Containing water | HFC (Fuchs: Hydrotherm 46M, Renosafe 500; Petrofer: Ultra Safe 620; Houghton: Safe 620; Union: Carbide HP5046) | NBR | ISO 12922 | |
Features:
▶4/2 or 4/3-way version
▶For subplate mounting
▶Porting pattern according to ISO 4401-03-02-0-05
▶Control of flow direction and size
▶Operation by means of proportional solenoids with central thread
▶Spring-centered control spool
▶Integrated control electronics (OBE) with voltage or current input ("A1" and/or "F1")
Set-up
The valve basically consists of:
▷Housing (1) with connection surface
▷Control spool(2) with compression springs (3 and 4) and spring plate (5 and 6)
▷Solenoids (7 and 8) with central thread
▷Position transducer (9)
▷Integrated electronics (13)
▷Electric zero point adjustment (12) accessible via the rubber plug
Function:
▷With de-energized solenoids (7 and 8), central position of the control spool (2) by compression springs (3 and 4) between spring plates (5 and 6).
▷Direct operation of the control spool (2) by controlling a proportional solenoid, e.g. solenoid "b" (8)
-Displacement of the control spool (2) to the left proportional to the electric input signal
-This opens the connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristic
In the de-energized condition, the control spool(2) is held in a mechanical central position by the return springs 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.
Valve with 2 spool positions (version "4WREE...A...")
The function of this valve version basically corresponds to the valve with three spool positions. The 2 spool position valves are, however, only equipped with solenoid "a"(7). Instead of the 2nd proportional solenoid, there is a plug screw (10).
Pressure compensation element in the OBE "-967".
To prevent condensate formation in the housing of the integrated electronics (OBE), an electronics protection membrane (11) can be used.
Recommended for use outside industry-standard conditions with high ambient air humidity and significant cyclic temperature changes (e.g. outdoors).
Symbol of Proportional Directional Valve 4WREE-3X
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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