Directional Valve-WEH Series

4/3, 4/2 And 3/2 Directional Valves Of Pilot Operated

WEH Series

Specification: 10~32
Rated pressure: 280~350 bar
Rated flow: 160~1,100 L/min

Sub-plate mounting, electro hydraulic directioanl

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Product Advantages

• Electrohydraulic directioanl valve directioanls the oil path by controlling the main spool
• WEH electrohydraulic control
• Installation face follow DIN 24340 A, ISO 4401 and CETOP-RP 121H Sub-plate mounting connection
• Wet DC or AC solenoid (optional)
• With manual emergency control
• Electropneumatic connection as single or center connection
• Spring or hydraulic alignment or bias

Technical Specs

NG10

Specifications			H-WEH10 type				WEH10 type
Max. operating pressure：P、A、B			350				280
Port T	With external pilot oil drain bar		315
	With internal pilot oil drain bar		DC 210 AC 160
Port Y	With external pilot oil drain bar		DC 210 AC 160
Min. control pressure	With external pilot oil supply ( not apply to C、Z、 F、G、H、P、T、V) bar		3-position valve 10
			Spring-return 2-position valve 10
			Hydraulic-return 2-position valve 7
	With internal pilot oil supply ( apply to C、Z、F、 G、H、P、T、V) bar		6.5
Max. control pressure bar			250
Fluid			Mineral oil,Phosphate ester
Fluid temperature range ℃			-30 to +80 ( NBR seals
			-20 to +80 ( FKM seals )
Viscosity range mm²/s			2.8 to 500
Switching pilot oil volume cm³			3-position valve 2.04
			2-position valve 4.08
Switching times (= Valve switching time from the neutral position to the switched position)（AC and DC ）
Control pressure bar			70		140		210		250
			AC	DC	AC	DC	AC	DC	AC	DC
3-position valve ms			30	65	25	60	20	55	15	50
2-position valve ms			35	80	30	75	25	70	20	65
Switching times (= Valve switching time from the switched position to the neutral position)
3-position valve ms			30
2-position valve ms			35	40	30	35	25	30	20	25
Installation position			HC、HD、HK、HZ、HY Type hydraulic-return valves are installed horizontally, the rest can be installed arbitrarily
Flow of shortest switching time L/min			about 35
Weight		Single solenoid valve kg	6.7
		Double solenoid valve kg	7.1
		Switching time regulator kg	1.0
		Reducing valve kg	0.5

NG16

Specifications

H-...WEH16... type

...WEH16... type

Max. operating pressure：P、A、B

350

Port T

With external pilot oil drain bar

250

With internal pilot oil drain bar

DC 210 AC 160

Hydraulic-centering 3-position valve With internal pilot oil drain is impossible

Port Y

With external pilot oil drain bar

DC 210 AC 160

Min. control pressure

With external pilot oil supply ( not apply to C、Z、
F、G、H、P、T、V)bar

3-position valve 14

Spring-return 2-position valve 14

Hydraulic-return 2-position valve 14

With internal pilot oil supply ( apply to C、Z、F、 G、
H、P、T、V) bar

When applying prepressing or the flow is large correspondingly ,enginery of spool valve is 4.5 as C,Z,F,G,H,P,T and V

Max. control pressure bar

250

Fluid

Mineral oil,Phosphate ester

Fluid temperature range ℃

-30 to +80 ( NBR seals

-20 to +80 ( FKM seals )

Viscosity range mm²/s

2.8 to 500

Switching pilot oil volume

- Spring-centering 3-position valve cm³

5.72

- 2-position valve cm³

11.45

Hydraulic-centering 3-position valve

- From"0"position to working position"a" cm³

2.83

- From working position"a" to "0"position cm³

2.9

- From"a"position to working position"b" cm³

5.72

- From working position"b" to "0"position cm³

2.83

* * Switching times (= Valve switching time from the neutral position to the switched position)(AC and DC)

Control pressure bar

150

250

- Spring-centering 3-position valve ms

- 2-position valve ms

- Hydraulic-centering 3-position valve ms

**Switching times (= Valve switching time from the neutral position to the switched position)

- Spring-centering 3-position valve ms

- 2-position valve ms

- Hydraulic-centering 3-position valve ms

Installation position

C,D,K,Z,Y Type hydraulic-return valves are installed horizontally, the rest can be installed arbitrarily

Flow of shortest switching time L/min

about 35

Weight kg

about 9.5

NG25

Specifications		H-...WEH25... type								...WEH25... type
Max. operating pressure：P、A、B		350								280
Port T	With external pilot oil drain bar	250

	With internal pilot oil drain bar	DC 210 AC 160
		Hydraulic-centering 3-position valve With internal pilot oil drain is impossible
Port Y	With external pilot oil drain bar	DC 210 AC 160
Min. control pressure	With external pilot oil supply ( not apply to C、Z、F、 G、H、P、T、V) bar	Spring-centering 3-position valve 13
		Hydraulic-centering 3-position valve 18
		Spring-return 2-position valve 13
		Hydraulic-return 2-position valve 8
	With internal pilot oil supply ( apply to C、Z、F、 G、H、P、T、V) bar	When applying prepressing or the flow is large correspondingly ,enginery of spool valve is 4.5 as C,Z,F,G,H,P,T and V
Max. control pressure bar		250
Fluid		Mineral oil,Phosphate ester
Fluid temperature range ℃		-30 to +80 ( NBR seals
		-20 to +80 ( FKM seals )
Switching pilot oil volume
- Spring-centering 3-position valve cm³		14.2
- 2-position valve cm³		28.4
Hydraulic-centering 3-position valve

- From"0"position to working position"a" cm³		7.15
- From working position"a" to "0"position cm³		7.0
-From "0"position to working position"b" cm³		14.15
-From working position"b" to "0"position cm³		5.73
* Switching times (= Valve switching time from the neutral position to the switched position)(AC and DC)
Control pressure bar		50				140				210				250
		AC		DC		AC		DC		AC		DC		AC		DC
- Spring-centering 3-position valve ms		50		85		40		75		35		70		30		65
- 2-position valve ms		120		160		100		130		85		120		70		105
- Hydraulic-centering 3-position valve ms		a	b	a	b	a	b	a	b	a	b	a	b	a	b	a	b
		30	35	55	65	30	35	55	65	25	30	50	60	25	30	50	60
*Switching times (= Valve switching time from the neutral position to the switched position)
- Spring-centering 3-position valve ms		40
- 2-position valve ms		120		125		95		100		85		90		75		80
- Hydraulic-centering 3-position valve ms		a	b	a	b	a	b	a	b	a	b	a	b	a	b	a	b
		20	35	30	35	30	35	30	35	30	35	30	35	30	35	30	35
Installation position		C,D,K,Z,Y Type hydraulic-return valves are installed horizontally, the rest can be installed arbitrarily
Flow of shortest switching time L/min		about 35
Weight kg		about 18

NG32

Specifications		H-...WEH32... type						...WEH32... type
Max. operating pressure：P、A、B		350						280
Port T	With external pilot oil drain bar	250

	With internal pilot oil drain bar	DC 210 AC 160
		Hydraulic-centering 3-position valve With internal pilot oil drain is impossible
Port Y	With external pilot oil drain bar	DC 210 AC 160
Min. control pressure	With external pilot oil supply With internal pilot oil supply	3-position valve 8.5

		Spring-return 2-position valve 10
		Hydraulic-return 2-position valve 15
	With internal pilot oil supply ( apply to C、Z、F、 G、H、P、T、V) bar	When applying prepressing or the flow is large correspondingly ,enginery of spool valve is 4.5 as C,Z,F,G,H,P,T and V
Max. control pressure bar		250
Fluid		Mineral oil,Phosphate ester
Fluid temperature range ℃		-30 to +80 ( NBR seals
		-20 to +80 ( FKM seals )
Viscosity range mm²/s		2.8 to 500
Switching pilot oil volume
- Spring-centering 3-position valve cm³		29.4
- 2-position valve cm³		58.8
Hydraulic-centering 3-position valve
- From"0"position to working position"a" cm³		14.4
- From working position"a" to "0"position cm³		15.1
- From "0"position to working position"b" cm³		29.4
- From working position"b" to "0"position cm³		14.4
* Switching times (= Valve switching time from the neutral position to the switched position)(AC and DC)
Control pressure bar		50				150				250
		AC		DC		AC		DC		AC		DC
- Spring-centering 3-position valve ms		65		80		50		90		35		105
- 2-position valve ms		100		130		75		100		60		115
- Hydraulic-centering 3-position valve ms		a	b	a	b	a	b	a	b	a	b	a	b
		55	60	100	105	40	45	85	95	35	40	85	95
*Switching times (= Valve switching time from the neutral position to the switched position)
- Spring-centering 3-position valve ms		( DC ：50，AC ：60)
- 2-position valve ms		115		90		35		70		65		65
- Hydraulic-centering 3-position valve ms		a	b	a	b	a	b	a	b	a	b	a	b
		30	50	30	40	60	75	30	30	105	140	50	50
Installation position		C、D、K、Z、YType hydraulic-return valves are installed horizontally, the rest can be installed arbitrarily
Flow of shortest switching time L/min		about 50
Weight kg		about 36