BOSCH REXROTH
R978870735

BOSCH REXROTH
Material:R978870735
Model:4WP10M3X/12

Due to extremely high demand, please call 877-366-7226 for availability

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth 4WP10M3X/12 (R978870735) is a high-performance directional spool valve designed for the precise control of fluid flow in hydraulic systems. This valve is part of the WP series, known for their reliable operation in controlling the start, stop, and direction of flow. The 4WP10M3X/12 features a robust housing and utilizes pneumatic actuation to shift the control spool to its desired position. This movement is facilitated by an actuation cylinder, while one or two return springs ensure that the spool returns to its central or initial position when not energized. The model's design excludes the version O characteristic where return springs are not used to hold the spool at rest. Additionally, it includes a throttle insert option for scenarios where operating conditions might cause excessive flows during switching processes, potentially surpassing the valve's performance limit. The 4WP10M3X/12 adheres to ISO porting pattern standards, which ensures compatibility with various hydraulic systems. With a component series X designation, this valve can withstand a maximum operating pressure of up to several hundred bar and can manage maximum flow rates measured in liters per minute (l/min), making it suitable for a wide range of applications that require robust performance and reliable directional control of fluids within hydraulic circuits. Its pneumatic operating method provides responsive control and contributes to the overall efficiency and effectiveness of hydraulic systems where this valve is deployed.

Valves of type WP are fluidically actuated directional spool valves.

They control the start, stop and direction of a flow.

The directional valves basically consist of housing (1), one type of actuation (2.2) (pneumatic actuation cylinder), control spool (3) and one or two return springs (4).

When de-energized, the control spool (3) is held in the central position or in the initial position by the return springs (4) (except for version "O").

The control spool (3) is moved to the desired spool position by means of the types of actuation.

technical illustration-R978870735-4/3-, 4/2- or 3/2-way version Porting pattern according to ISO 4401-05-04-0-05 Operating methods: pneumatic

Throttle insert

The use of a throttle insert is required when, due to prevailing operating conditions, flows occur during the switching processes which exceed the performance limit of the valve.

01	02	03	04	05		06		07	08	09	10	11
	WP	10		5X	/		/	no code				*

01	3 main ports			3
	4 main ports			4
Types of actuation
02	Fluidic: pilot pressure 8 … 160 bar			WP
03	Size 10			10
04	Symbols e. g. C, E, EA, EB, etc.; for the possible version, see Symbols and Types of actuation
05	Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions)			5X
06	With spring return			no code
	Without spring return (not for valve with 3 spool positions)			O
	Without spring return with detent (not for valve with 3 spool positions)			OF
Corrosion protection
07	Standard corrosion protection			no code
Throttle insert1)
08	Without throttle insert			no code
	With throttle insert:
	Connection	Throttle Ø in mm
		0,8 mm	1,0 mm	1,2 mm
	P	B08	B10	B12
	A	H08	H10	H12
	B	R08	R10	R12
	A and B	N08	N10	N12
	T 2)	X08	X10	X12
	Further throttle insert diameters upon request.
Seal material
09	NBR seals			M
	FKM seals			V
	Seals for HFC hydraulic fluids			MH
	Observe compatibility of seals with hydraulic fluid used.
Pilot oil port
10	Whitworth pipe thread G1/4			‒
	UNF thread 7/16 “ - 20 UNF			/12
11	Further details in the plain text			*

	1) When the admissible valve performance limit is exceeded, throttle inserts are to be installed (see Performance limits).
	2) When throttle inserts are used in channel T, the pressure in the working ports and in case of connection to the tank chambers must not exceed 210 bar.

general

Size			10
Weight	Valve with one actuation cylinder	kg	2.9
Weight	Valve with two actuation cylinders	kg	3.7
Installation position			any
Ambient temperature range	NBR seals	°C	-20 … +70
Ambient temperature range	FKM seals	°C	-15 … +70
Storage temperature range		°C	-20 … +50

hydraulic

Size			10
Maximum operating pressure	Port P	bar	350
	Port A	bar	350
	Port B	bar	350
	Port T 1)	bar	210
Maximum flow		l/min	160
Pilot pressure		bar	8 … 160
Pilot volume		cm³	6.9
Hydraulic fluid			see table
Hydraulic fluid temperature range 2)	NBR seals	°C	-20 … +80
Hydraulic fluid temperature range 2)	FKM seals	°C	-15 … +80
Viscosity range		mm²/s	2.8 … 500
Maximum admissible degree of contamination of the hydraulic fluid 3)			Class 20/18/15 according to ISO 4406 (c)

1)	With symbols A or B, port T must be used as leakage oil connection if the operating pressure exceeds the admissible tank pressure.
2)	at the valve working ports of the valve
3)	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
Mineral oils and related hydrocarbons		HL, HLP, HLPD, HVLP, HVLPD	NBR, FKM	DIN 51524
Bio-degradable	Insoluble in water	HETG	NBR, FKM	VDMA 24568
	Insoluble in water	HEES	FKM	VDMA 24568
	Soluble in water	HEPG	FKM	VDMA 24568
Containing water	Water-free	HFDU, HFDR	FKM	ISO 12922
Containing water	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922
Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! 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 compared to operation with mineral oil HL, HLP 50 to 100 %

For applications outside these parameters, please consult us!

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

Δp-qV characteristic curves

Symbol	Direction of flow
Symbol	P ‒ A	P ‒ B	A ‒ T	B ‒ T
A; B	6	6	‒	‒
C	1	2	5	7
D	2	2	5	7
E	17	16	19	21
F	2	3	22	23
G	4	4	24	24
H	14	14	20	21
J	3	3	9	11
J73	22	21	23	24
L	3	3	9	9
M	14	14	6	8
P	17	14	20	23
Q	16	17	4	8
R	18	21	18	24
T	18	4	10	24
U	3	3	6	11
V	17	17	18	20
W	upon request

Central position:
Symbol	Direction of flow
Symbol	P ‒ A	P ‒ B	B ‒ T	A ‒ T	P ‒ T
H	12	12	13	13	15

Performance limits

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

Notice!

The specified performance limits are valid for use with two directions of flow (e. g. from P to A and simultaneous return flow from B to T).

Due to the flow forces acting within the valves, the admissible performance limit may be considerably lower with only one direction of flow (e. g. from P to A while port B is blocked)!

In such use cases, please consult us!

Characteristic curve	Symbol
11	C, C/OF, D, D/OF, E, J, L, M, U
12	B
13	A
14	G
15	H

1)	Example:Symbol E with spool position “a” → ordering code ..EA..Symbol E with spool position “b" → ordering code ..EB..

Dimensions in mm

Notices!

Deviating from ISO 4401, port T is referred to as TA and port T1 is referred to as TB in this data sheet. The dimensions are nominal dimensions which are subject to tolerances. When screwing in/releasing the connection tube on the pilot oil port (9), the bushing (10) must be secured against twisting by using an open-end wrench.

Subplates according to data sheet 45054 (separate order)

G 66/01 (G3/8) 1)

G 67/01 (G1/2) 1)

G 534/01 (G3/4) 1)

G 66/12 (SAE-6; 9/16-18) 2)

G 67/12 (SAE-8; 3/4-16) 2)

G 534/12 (SAE-12; 1-1/16-12) 2)

Valve mounting screws (separate order)

4 hexagon socket head cap screws, metric

ISO 4762 - M6 x 40 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

tightening torque MA = 12.5 Nm ± 10 %,

material no. R913000058

4 hexagon socket head cap screws

ISO 4762 - M6 x 40 - 10.9 (self procurement)

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 15.5 Nm ± 10 %

4 hexagon socket head cap screws UNC

1/4-20 UNC x 1-1/2” ASTM-A574

(friction coefficient μtotal = 0.19 to 0.24);

tightening torque MA = 25 Nm ± 15 %,

(friction coefficient μtotal = 0.12 to 0.17);

tightening torque MA = 19 Nm ± 10 %,

material no. R978800710

With different friction coefficients, the tightening torques are to be adjusted accordingly!

BOSCH REXROTHR978870735

general

hydraulic

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

Δp-qV characteristic curves

Performance limits

BOSCH REXROTH
R978870735