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BOSCH REXROTH
H-4WEH25C6X/6EG24NXEETZ2/B10D3
R901427470
Directional Spool Valves

Name: BOSCH REXROTH H-4WEH25C6X/6EG24NXEETZ2/B10D3
Brand: BOSCH REXROTH
SKU: 856520
Price: 9994.00 USD
Availability: OutOfStock

Direct. spool valves: WEH,WHH 25.-6x/

$9,994.00

BOSCH REXROTH

MATERIAL: R901427470

SUMMARY: Direct. spool valves: WEH,WHH 25.-6x/

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Type H-4WEH 16…XE...

technical illustration-H-4WEH25C6X/6EG24NXEETZ2/B10D3-Direct. spool valves: WEH,WHH 25.-6x/

Directional valves type H-4WEH…

The valve type H-4WEH is a directional spool valve with electro-hydraulic actuation. It controls the start, stop and direction of a flow.

The directional valves basically consist of the main valve with housing (1), the main control spool (2), one or two return springs (3.1) and (3.2), as well as the pilot control valve (4) with one or two solenoids "a" (5.1) and/or "b" (5.2).

The main control spool (2) in the main valve is held in the zero or initial position by the springs or by means of pressurization. In the initial position, the two spring chambers (6) and (8) are connected with the tank in a depressurized form via the pilot control valve (4). Via the control line (7), the pilot control valve is supplied with pilot oil. Supply can be implemented internally or externally (externally via port X).

Upon actuation of the pilot control valve, e.g. solenoid "a", the pilot control spool (10) is moved to the left and thus, the spring chamber (8) is pressurized with pilot pressure. The spring chamber (6) remains depressurized.

The pilot pressure acts on the left side of the main control spool (2) and moves it against the spring (3.1). This connects port P with B and A with T in the main valve.

When the solenoid is switched off, the pilot control spool returns into the initial position (except for impulse spool). The spring chamber (8) is unloaded to the tank.

The pilot oil from the spring chamber is displaced into channel Y via the pilot control valve.

The pilot oil supply and return can be effected internally or externally.

The manual override (9) allows control spool (10) to be moved without solenoid energization.

Notes:

The return springs (3.1) and (3.2) in the spring chambers (6) and (8) hold the main control spool (2) in central position without pilot pressure even with, for example, vertical valve positioning.

Due to the design principle, internal leakage is inherent to the valves, which may increase over the life cycle.

Pilot oil supply

Type H-4WEH…

The pilot oil supply is effected externally via channel X from a separate circuit.

The pilot oil return is effected externally via channel Y into the tank.

Type H-4WEH…E…

The pilot oil supply is effected internally from channel P of the main valve.

The pilot oil return is effected externally via channel Y into the tank. In the subplate, port X is closed.

Type H-4WEH…ET…

The pilot oil supply is effected internally from channel P of the main valve.

The pilot oil return is effected internally via channel T into the tank. In the subplate, ports X and Y are closed.

Type H-4WEH…T…

The pilot oil supply is effected externally via channel X from a separate circuit.

The pilot oil return is effected internally via channel T into the tank. In the subplate, port Y is closed.

Throttle insert

Use of the throttle insert (2) is necessary if the pilot oil supply in channel P of the pilot control valve (1) is to be limited.

The throttle insert (2) is inserted in channel P of the pilot control valve (1).

1	Pilot control valve
2	Throttle insert
3	Seal ring
4	Main valve

01		02	03	04	05	06	07		08	09	10	11	12	13	14	15	16	17	18	19
H	–	4	WEH					/		6E			XE			Z2

01	Up to 350 bar	H
02	4-way version	4
03	Directional valve, electro-hydraulically actuated	WEH
Size
04	NG10	10
	NG16	16
	NG25	25
	NG32	32
Control spool return main valve
05	by means of springs	no code
05	hydraulic 1)	H
06	For control spool symbols, see symbols
07	Component series 40 ... 49 – NG10 (40 ... 49: unchanged installation and connection dimensions)	4X
	Component series 60 ... 69 – NG25 (4W.H 25.) and NG32 (60 ... 69: unchanged installation and connection dimensions)	6X
	Component series 70 ... 79 – NG16 (70 ... 79: unchanged installation and connection dimensions)	7X
Control spool return in the pilot control valve with 2 spool positions and 2 solenoids only possible with control spool C, D, K, Z and hydraulic control spool return in the main valve
08	Without spring return	O
08	Without spring return with detent	OF
09	Pilot control valve with wet-pin solenoids, high-power valve (data sheet 23178-XE)	6E
10	Direct voltage 24 V	G24
	Alternating voltage 230 V, 50/60 Hz	W230R
	Further ordering codes for other voltages are provided under "Electrical connection"
11	Without manual override	no code
11	with manual override (standard)	N
12	“Increased safety” explosion protection; for details, please refer to the explosion protection information	XE
13	External pilot oil supply, external pilot oil return 2)	no code
	Internal pilot oil supply, external pilot oil return 3)	E
	Pilot oil supply internal, pilot oil return internal 3)	ET
	External pilot oil supply, internal pilot oil return 2)	T
14	without switching time adjustment	no code
	Switching time adjustment as supply control	S
	Switching time adjustment as discharge control	S2
Electrical connection
15	Solenoid with terminal box and cable gland; for details please refer to "Electrical connection"	Z2
Throttle insert
16	Without throttle insert	no code
	Throttle Ø 0.8 mm	B08
	Throttle Ø 1.0 mm	B10
	Throttle Ø 1.2 mm	B12
	Throttle Ø 1.5 mm	B15
preload valve (not for NG10)
17	without preload valve	no code
17	with preload valve (pö = 4.5 bar)	P4,5
18	without pressure reducing valve	no code
18	with pressure reducing valve 4)	D3
19	NBR seals	no code
	FKM seals (other seals upon request)	V
	Observe compatibility of seals with hydraulic fluid used.

1)	2 spool positions (hydraulic end position): only symbols C, D, K, Z, Y
2)	External pilot oil supply X or pilot oil return Y:
	– Observe the maximum pilot pressure according to Technical data!
3)	Internal pilot oil supply (version “ET” and “E”):
	– Observe the minimum pilot pressure according to Technical data!
	– In order to prevent inadmissibly high pressure peaks, a throttle insert "B10" has to be provided in port P of the pilot control valve (see Product description, Pilot oil supply).
	– You must moreover provide the pressure reducing valve "D3".
4)	Only in connection with throttle insert "B10"

Notice:

The manual override cannot be allocated a safety function and may only be used up to a tank pressure of 50 bar.

general

Size				10	16	25	32
Installation position				any; horizontal with valves with hydraulic control spool return “H” and control spool C, D, K, Z or Y
Ambient temperature range 1)			°C	-20 … +70
Storage temperature range			°C	+5 … +40
Maximum storage time			Years	1
Weight	Valve with one solenoid		kg	8.5	11	19	36.5
	Valve with two solenoids, spring-centered		kg	10.2	12.5	20.5	39
	Switching time adjustment		kg	0.8
	Pressure reducing valve		kg	0.4
Surface protection	Valve body	Pilot control valve		Galvanized
	Valve body	Main valve		Galvanized
	Solenoid			Galvanized
MTTFD values according to EN ISO 13849			Years	100

1)	Observe the "Special application conditions for safe application"

hydraulic

Size				10	16	25	32
Maximum operating pressure	Port P		bar	350
	Anschluss A		bar	350
	Port B		bar	350
	Port T	with external pilot oil return Y	bar	250
	Port T	with internal pilot oil return Y	bar	210
	Port Y	with pilot oil return external	bar	210
Maximum flow of the main valve			l/min	160	300	700	1100
Maximum pilot pressure 1)			bar	250
Minimum pilot pressure	External or internal pilot oil supply X (with control spool D, K, E, J, L, M, Q, R, U, W)	3-spool position valve, spring-centered	bar	10	14	13	8.5
		2-spool position valve, spring end position	bar	10	14	13	10
		2-spool position valve, hydraulic end position	bar	7	14	8	5
	Internal pilot oil supply X (with control spool C, F, H, P, T, V, Z, S) 2)		bar	6.5 3)	4.5 4)
Pilot volume for switching process	3-spool position valve, spring-centered		cm³	2.04	5.72	14.2	29.4
Pilot volume for switching process	2-spool position valve		cm³	4.08	11.45	28.4	58.8
Pilot volume for shortest switching time, approx.			l/min	35			45
Hydraulic fluid				see table "Hydraulic fluid"
Hydraulic fluid temperature range	NBR seals		°C	-20 … +80
Hydraulic fluid temperature range	FKM seals		°C	-15 … +80
Viscosity range			mm²/s	2.8 … 500
Maximum admissible degree of contamination of the hydraulic fluid 5)				Class 20/18/15 according to ISO 4406 (c)
Maximum surface temperature				see Information on explosion protection

1)	With a higher pilot pressure, use of a pressure reducing valve is required.
2)	Symbol S only for NG16
3)	For symbols C, F, G, H, P, T, V, Z, an internal pilot oil supply is only possible if the flow from P → T in the central position (for 3-spool position valve) or while crossing the central position (for 2-spool position valve) is so large that the pressure differential of P → T reaches a value of at least 6.5 bar.
4)	For symbols C, F, G, H, P, T, V, Z, S (Symbol S only for Size 16) – by meansof a preload valve (not Size 10) or a correspondinglyhigh flow.
5)	The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter.

Hydraulic fluid		Classification	Suitable sealing materials	Standards	Data sheet
Mineral oil		HL, HLP, HLPD	NBR, FKM	DIN 51524	90220
Bio-degradable	Insoluble in water	HETG	NBR, FKM	ISO 15380	90221
	Insoluble in water	HEES	FKM	ISO 15380
	Soluble in water	HEPG	FKM	ISO 15380
Flame-resistant	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922	90223

Important notice on hydraulic fluids:

For more information and data on the use of other hydraulic fluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). Ignition temperature > 180 °C

• Flame-resistant - containing water:

- Maximum pressure differential per control edge 50 bar

- Pressure pre-loading at the tank port >20% of the pressure differential, otherwise increased cavitation

- Life cycle as compared to operation with mineral oil HL, HLP 50 to 100%

electrical

Voltage type		Direct voltage	AC voltage
Available voltages	V	24 / 48 / 96 / 110	110 / 230
Voltage tolerance (nominal voltage)	%	± 10
Admissible residual ripple	%	< 5	-
Duty cycle/operating mode according to VDE 0580		S1 (continuous operation)
Switching time according to ISO 6403 1)		See switching times table
Maximum switching frequency	1/h	15000	7200
Nominal power with ambient temperature 20 °C	W	17
Maximum power with 1.1 x nominal voltage and an ambient temperature of 20 °C	W	20.6
Type of protection according to EN 60529 2)		IP66

1)	The switching times were determined at a hydraulic fluid temperature of 40 °C and a viscosity of 46 mm2/s. Deviating hydraulic fluid temperatures can result in different switching times. Switching times change dependent on operating time and application conditions.
2)	With correctly installed electrical connection

Notice:

Solenoids for AC voltage are DC solenoids with integrated rectifier

Information on explosion protection

Application according to Explosion Protection Directive 2014/34/EU		II 2G
Type of protection valve		c (EN 13463-5)
Maximum surface temperature 1)	°C	135
Temperature class		T4
Valve solenoid type of protection according to EN 60079-7 / EN 60079-18		Ex eb mb IIC T4 Gb
Baumusterprüfbescheinigung Magnet		KEMA 02ATEX2240 X
“IECEx Certificate of Conformity” for solenoid		IECEx DEK 12.0068X
Ambient temperature range 2)	°C	-20 … +70

1)	Surface temperature > 50 °C, provide contact protection.
2)	Observe the "Special application conditions for safe application"

Special application conditions for a safe application

In case of valves with two solenoids, maximally one of the solenoids may be energized at a time. Simultaneously power supply to several valves in bank assembly is possible if the ambient temperature does not exceed 60°C. In case of bank assembly, if only one of the solenoids is energized at a time, and during individual operation, the maximum ambient temperature must not exceed 70°C. The maximum temperature of the surface of the valve jacket is 120°C. This has to be considered when selecting the connection cable and/or a contact of the connection cable with the surface of the jacket is to be prevented.

Switching times (= Contacting at the pilot control valve until start of opening of the control edge in the main valve and change in the control spool stroke by 95%)

Pilot pressure		bar	70	250	Spring
Pilot pressure		bar	ON		OFF
NG10	Without throttle insert	ms	50 … 70	50 … 70	30 … 40
NG10	With throttle insert	ms	70 … 100	60 … 80	30 … 40
NG16	Without throttle insert	ms	60 … 90	50 … 70	60 … 90
NG16	With throttle insert	ms	120 … 140	90 … 110	60 … 90
NG25	Without throttle insert	ms	80 … 110	60 ... 80	110 ... 140
NG25	With throttle insert	ms	210 …260	130 … 160	110 ... 140
NG32	Without throttle insert	ms	90 … 140	80 … 110	150 … 170
NG32	With throttle insert	ms	430 … 570	240 … 360	150 … 170

Notices:

The switching times are measured according to ISO 6403 with HLP46, ϑOil = 40 ° C ± 5 ° C). With different oil temperatures, variations are possible. The switching times increase by approx. 30 ms if the pressure reducing valve "D3" is used. The switching times have been determined under ideal conditions and may differ in the system, depending on the application conditions.

Free flow cross-sections in zero position with control spools Q, V and W

Size			10	16	25	32
Control spool Q	A – T; B – T	mm²	13	32	83	78
Control spool V	A – T; B – T	mm²	13	32	83	73
Control spool V	P – A	mm²	13	32	83	84
Control spool W	A – T; B – T	mm²	2.4	6	14	20

(measured with HLP46, ϑOil = 40 °C ±5 °C)

Type H-4WEH 10…

Δp-qV characteristic curves

Characteristic curve selection
Symbol	Spool position				Symbol	Zero position
Symbol	P – A	P – B	A – T	B – T	Symbol	A – T	B – T	P – T
E, Y, D	2	2	4	5
F	1	4	1	4	F	3	–	6
G, T	4	2	2	6	G, T	–	–	7
H, C	4	4	1	4	H	1	3	5
J, K	1	2	1	3
L	2	3	1	4	L	3	–	–
M	4	4	3	4
P	4	1	3	4	P	–	7	5
Q, V, W, Z	2	2	3	5
R	2	2	3	–
U	3	3	3	4	U	–	4	–

Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)

NG10

2- and 3-spool position valve – qV maxin l/min
Symbol	Operating pressure pmax in bar
Symbol	200	250	315
E, J, L, M, Q, R, U, V, W, C, D, K, Z, Y	160	160	160
H	160	150	120
G, T	160	160	140
F, P	160	140	120

(measured with HLP46, ϑOil = 40 °C ±5 °C)

Type H-4WEH 16…

Δp-qV characteristic curves

Characteristic curve selection
Symbol	Switching positions
Symbol	P – A	P – B	A – T	B – T	P – T
E, Y, D	1	1	3	4	–
E19	–	6	8	7	–
F	1	1	5	4	–
G, T	4	1	5	5	9
H, C, Q, V, Z	1	1	5	6	–
J, K, L	1	1	5	6	–

Symbol	Spool position
Symbol	P – A	P – B	A – T	B – T	P – T
M, W	1	1	3	4	–
R	1	1	3	–	–
U	2	2	3	5	–
S	3	3	3	–	10

Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)

NG16

2-spool position valve – qV maxin l/min
Symbol	Operating pressure pmax in bar
Symbol	70	140	210	280	350
X external – spring end position in the main valve (with ppilot min = 12 bar)
C, D, K, Y, Z	300	300	300	300	300
X external – spring end position in the main valve 1)
C	300	300	300	300	300
D, Y	300	270	260	250	230
K	300	250	240	230	210
Z	300	260	190	180	160
X external – hydraulic end position in the main valve
HC, HD, HK, HZ, HY	300	300	300	300	300

1)	If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

NG16

3-spool position valves – qV max in l/min
Symbol	Operating pressure pmax in bar
Symbol	70	140	210	280	350
X external, spring centering in the main valve
E, E19, H, J, L, M, Q, U, W, R	300	300	300	300	300
F, P	300	250	180	170	150
G, T	300	300	240	210	190
S	300	300	300	250	220
V	300	250	210	200	180

	With control spools V, Z and HZ, the preload valve is not required for flows >180 l/min .

(measured with HLP46, ϑOil = 40 °C ±5 °C)

Type H-4WEH 25…

Δp-qV characteristic curves

Characteristic curve selection
Symbol	Spool position
Symbol	P – A	P – B	A – T	B – T
E	1	1	1	3
F	1	4	3	3
G	3	1	2	4
H	4	4	3	4
J, Q	2	2	3	5

Symbol	Spool position
Symbol	P – A	P – B	A – T	B – T
L	2	2	3	3
M	4	4	1	4
P	4	1	1	5
R	2	1	1	–

Symbol	Spool position
Symbol	P – A	P – B	A – T	B – T
U	4	1	1	6
V	2	4	3	6
W	1	1	1	3
T	3	1	2	4

Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)

NG25

2-spool position valve – qV maxin l/min
Symbol	Operating pressure pmax in bar
Symbol	70	140	210	280	350
X external – spring end position in the main valve (with ppilotmin = 13 bar)
C, D, K, Y, Z	700	700	700	700	650
X external – spring end position in the main valve 1)
C	700	700	700	700	650
D, Y	700	650	400	350	300
K	700	650	420	370	320
Z	700	700	650	480	400
X external – hydraulic end position in the main valve
HC, HD, HK, HZ, HY	700	700	700	700	700
HC./O…, HD./O…, HK./O…, HZ./O…	700	700	700	700	700
HC./OF…, HD./OF…, HK./OF…, HZ./OF…	700	700	700	700	700

1)	If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

NG25

3-spool position valves – qV max in l/min
Symbol	Operating pressure pmax in bar
Symbol	70	140	210	280	350
X external, spring centering in the main valve
E, L, M, Q, U, W	700	700	700	700	650
G, T	400	400	400	400	400
F	650	550	430	330	300
H	700	650	550	400	360
J	700	700	650	600	520
P	650	550	430	330	300
V	650	550	400	350	310
R	700	700	700	650	580

(measured with HLP46, ϑOil = 40 °C ±5 °C)

Type H-4WEH 32…

Δp - qV characteristic curves – Symbol E, R and W

Type H-4WEH 32…

∆p - qV characteristic curves – Symbol G and T

Characteristic curve selection
Symbol	Spool position
Symbol	P – A	P – B	A – T	B – T	B – A
E	4	4	3	2	–
R	4	4	3	–	1
W	4	4	3	2	–

Symbol	Spool position
Symbol	P – A	P – B	A – T	B – T	P – T
G	7	8	7	5	6
T	7	8	7	5	6

Performance limits: (measured with HLP46, ϑOil = 40 °C ±5 °C)

Size 32

2-spool position valve – qV maxin l/min
Symbol	Operating pressure pmax in bar
Symbol	70	140	210	280	350
X external – spring end position in the main valve (with ppilot min = 10 bar)
C, D, K, Y, Z	1100	1040	860	750	680
X external – spring end position in the main valve 1)
C	1100	1040	860	800	700
D, Y	1100	1040	540	480	420
K	1100	1040	860	500	450
Z	1100	1040	860	700	650
X external – hydraulic end position in the main valve
HC, HD, HK, HZ, HY	1100	1040	860	750	680

1)	If the specified flow values are exceeded, the function of the return spring is no longer guaranteed if the pilot pressure fails!

Size 32

3-spool position valves – qV max in l/min
Symbol	Operating pressure pmax in bar
Symbol	70	140	210	280	350
X external, spring centering in the main valve
E, J, L, M, Q, R, U, W	1100	1040	860	750	680
G, T, H, F, P	900	900	800	650	450
V	1100	1000	680	500	450

Performance limits: important information

Notice (applies to all sizes):

The specified switching power limits are valid for use with two directions of flow (e. g. from P → A and simultaneous return flow from B → T) at the ratio 1:1.

Due to the flow forces acting within the valves, the admissible switching power limit may be considerably lower with only one direction of flow (e. g. from P → A while port B is blocked, with flow in the same or in different directions)!

In such cases, please consult us!

The switching power limit was established while the solenoids were at operating temperature, at 10 % undervoltage and without tank preloading.

NG16	With pilot oil supply X internal, a preload valve has to be used for flows < 160 l/min due to the negative overlap of symbols V, C, Z and HC, HZ. With pilot oil supply X internal, sufficient flow has to be ensured due to the negative overlap of symbols F, G, H, P, S and T (for the determination of the required flow, see "Preload valve" characteristic curves). If the required flow is not reached, a preload valve has to be used (see technical data).
NG25	With pilot oil supply X internal, a preload valve has to be used for flows < 180 l/min due to the negative overlap of the symbols Z, HZ and V. With pilot oil supply X internal, sufficient flow has to be ensured due to the negative overlap of symbols C, HC, F, G, H, P, and T (for the determination of the required flow, see "Preload valve" characteristic curves). If the required flow is not reached, a preload valve has to be used (see technical data).
NG32	With pilot oil supply X internal a preload valve has to be used for flows < 180 l/min due to the negative overlap of symbols Z, HZ and V. With pilot oil supply X internal sufficient flow needs to be ensured due to the negative overlap of symbols C, HC, F, G, H, P and T (for determination of the required flow, see “Preload valve” characteristic curves. If the required flow is not reached, a preload valve has to be used (see technical data).