ZSF125F0-1-2X/M/01

Manufacturer: Bosch Rexroth

Material #: R901081775

Model : ZSF125F0-1-2X/M/01

***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 ZSF125F0-1-2X/M/01 (R901081775) is a pilot-operated check valve in a sandwich plate design that offers versatility and reliability for hydraulic systems. This model is part of the component series X, which signifies its advanced design and capability to handle high-pressure applications up to a maximum operating pressure of 350 bar. The ZSF125F0-1-2X/M/01 is engineered to ensure a maximum flow rate, providing efficient control over the flow of hydraulic fluid in various applications. This valve features an integrated throttle check valve for sizes NG6, NG10, and NG16, which allows for precise control of the flow passing through the valve. It also enables optional directional valve setup, ensuring flexibility in system design and application. The high-pressure connection NG25 underscores its suitability for use in systems with higher flow demands. For optimal performance, it's crucial to note that when using this model with size 25, a nozzle must be separately ordered and provided in channel P of the upstream directional valve. The diameter of this nozzle must be carefully selected according to the prefill valve size as indicated in the schematics provided by Bosch Rexroth. Failure to comply with this requirement could lead to increased dynamic loads that may adversely affect the operating time of the system. The Bosch Rexroth ZSF125F0-1-2X/M/01 is designed for those seeking a robust and adaptable solution for controlling fluid dynamics in complex hydraulic systems. Its combination of high-pressure capabilities, integrated throttle check functionality, and optional directional valve configurations make it an essential component for ensuring efficient and reliable operation across various hydraulic applications.

$3,697.00 USD

More are expected on August 8, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as August 8, 2025 when ordered in

This product is eligible for factory repair.

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Pilot operated check valve in sandwich plate design Directional valve set-up, optional High-pressure connection (NG32 … 160) Integrated throttle check valve (NG50, 63, 80 and 200)

Notice:

With size 32, 40, 100, 125, 160 a nozzle (separate order) must imperatively be provided in channel P of the upstream directional valve. The nozzle diameter is to be designed according to the prefill valve size (see "Schematics").

In case of non-compliance, increased dynamic loads may occur having detrimental effects on the operating time.

Type ZSF… (NG32, 40, 100, 125, 160)

Type ZSF… (NG200)

01	02	03	04		05		06		07		08	09	10
ZSF		F	0	–	1	–		/	M	/	01		*

01	Prefill valve, sandwich plate design	ZSF
02	Size 32	32
	Size 40	40
	Size 50	50
	Size 63	63
	Size 80	80
	Size 100	100
	Size 125	125
	Size 160	160
	Size 200	200
Type of connection
03	Flange connection	F
04	Without pre-decompression (With pre-decompression on request)	0
Cracking pressure main poppet
05	pÖ ≈ 0,12 bar	1
06	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) (NG32 … 100 and NG160)	1X
06	Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) (Size 125 1) and 200)	2X
Seal material
07	NBR seals	M
	FKM seals	V
	Observe compatibility of seals with hydraulic fluid used.
Connection version
08	Mounting cavities with pipe thread according to ISO 228, DIN EN 3852-part 2	01
08	Pipe thread “UNF/UN” according to ANSI/ASME B 1.1	12
Nozzle bore
09	NG32, 40, 100, 125, 160 (without throttle check valve)	no code
	NG50, 63, 80 (Possibility to include a throttle check valve, not fitted)	D00
	NG50, 63 (throttle check valve Ø0,8 mm)	D08
	NG80 (throttle check valve Ø1 mm)	D10
	NG200 (throttle check valve Ø4 mm)	D40
10	Further details in the plain text	*

	1) Compatible with series 1X

general

Size		32	40	50	63	80	100	125	160	200
Weight	kg	3.5	4.2	5.5	7	10	15	26	47	150
Installation position 1)		any
Ambient temperature range	°C	-30 … +80

1)	Working direction of the control spool

hydraulic

Size			32	40	50	63	80	100	125	160	200
Maximum operating pressure	Port P	bar	350
	Anschluss A	bar	16
	Port B	bar	350
	Anschluss X	bar	150
Cracking pressure 1)		bar	≈ 0.12
Flow (Δp = 0.3 bar)			Depending on the case of application, see below
Druckflüssigkeit			see table
Hydraulic fluid temperature range		°C	-30 … +70
Viscosity range		mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid 2)			Class 20/18/15 according to ISO 4406 (c)

1)	Pressure differential at the main poppet for overcoming the spring force
2)	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 oils		HL, HLP, HLPD, HVLP, HVLPD	NBR, FKM	DIN 51524	90220
Bio-degradable	Insoluble in water	HETG	FKM	ISO 15380	90221
	Insoluble in water	HEES	FKM	ISO 15380
	Soluble in water	HEPG	FKM	ISO 15380
Flame-resistant	Water-free	HFDU (glycol base)	FKM	ISO 12922	90222
		HFDU (ester base)	FKM
		HFDR	FKM
	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922	90223
Important information on hydraulic fluids: For further 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.). The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature. Flame-resistant – containing water: Maximum pressure differential 210 bar, otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100% Maximum hydraulic fluid temperature 60 °C Bio-degradable and flame-resistant: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.

Flow qV in l/min (A to B) for different cases of application (Δp = 0,3 bar)

Size		32	40	50	63	80	100	125	160	200
Case of application 1	l/min	200	300	500	800	1200	1900	3000	4200	7000
Case of application 2	l/min	170	250	400	650	1000	1600	2600	3900	6510
Case of application 3	l/min	140	220	360	560	900	1400	2200	3400	5670
Case of application 4	l/min	100	150	240	380	620	950	1500	2300	3850
Case of application 5	l/min	70	110	170	280	450	700	1100	1690	2800

Case of application 1

Case of application 2

Case of application 3

Size of the filling tank at least 1.5 x cylinder content

Case of application 4

Case of application 5

Information on case of application 2 to 5

For limit areas, please contact us. It is often enough, to select a pipeline which is one size larger.

Note:

Wrong dimensioning of prefill valve and suction line may cause cavitation and consequential damage.

1	Cylinders
2	Prefill valve
3	This sheet is not included in the scope of delivery. With smaller tank dimensions and minimum hydraulic fluid level (a), it prevents the formation of tunnels.
4	Observe the supply cross-section
a	at least 300 mm with extended cylinder
b	up to 1000 mm with the specified maximum flows
c	h ≤ 500 mm
h	300 mm ≤ h < 500 mm

For applications outside these parameters, please consult us!

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

Size 32, 40, and 50

Pressure differential Δp between ports A and B dependent on the flow qV (A to B).

Size 63, 80 and 100

Pressure differential Δp between ports A and B dependent on the flow qV (A to B).

Size 125, 160, and 200

Pressure differential Δp between ports A and B dependent on the flow qV (A to B).

Without throttle check valve, NG32, 40, 100, 125, 160

Separate, external nozzle fitting required (see "Dimensions - Nozzle fitting")

With throttle check valve, NG50, 63, 80

Throttle check valve installed at the factory; no nozzle required

NG200

Throttle check valve installed at the factory; no nozzle required

NG32 … 160

Dimensions in mm


Required surface quality of the valve contact surface

1	Throttle check valve (only NG50, 63, 80, 200)
2	Centering diameter
3	Name plate
4	Seal rings
5	Counterflange (separate order, see "dimensional proposal for counterflange")
6	Stroke of main poppet (see "Poppet geometry and determination of the minimum pilot pressure")
7	Note: Valve contact face (e.g. pressing cylinders, bearing structures, etc.) must be sufficiently rigid. The prefill valve must not be loaded by bending.
9	Space required to remove the mating connector
10	Valve mounting screws (separate order)
11	Threads for transport device (ring bolts), evenly distributed to circumference
12	Measuring point, tightening torque MA = 30 Nm ±10%
13	Damping nozzle M8 x 1
14	Additional pressure port; if not used, seal in a hydraulically tight way by means of suitable plug screws.

NG	B1	B2	B3	B4	B5	B6	ØD1	ØD2	ØD3		D4	ØD5	ØD6	H1	H2	H3	H4	P	T1	T2	X
	mm	mm	mm	mm	mm	max. mm	mm	mm	mm	mm		mm	mm	mm	mm	mm	mm		mm	min. mm
32	65	110	40	55	7.5	1.5	46	93	110	± 0.2	M16	42	49.5	77	50	26.5	26.5	G1/2	8	30	G1/4
40	70	115	40	55	7.5	1.5	58	108	125	± 0.2	M16	52	61.5	80	50	26.5	26.5	G1/2	10	35	G1/4
50	110	140	40	55	7.5	1.5	71	128	145	± 0.2	M16	70	75.7	97	50	26.5	26.5	G1/2	12	30	G1/4
63	115	145	45	55	7.5	1.5	90	143	160	± 0.2	M16	83	97.7	110	55	27.5	27.5	G3/4	14	35	G1/4
80	125	160	45	55	7.5	1.5	107	169	190	± 0.2	M20	100	112	123	60	30	30	G3/4	16	30	G1/4
100	140	190	55	55	7.5	1.5	132	212	240	± 0.2	M27	124	138.5	145	65	32.5	40	G1	25	55	G3/8
125	180	210	65	60	0	1.5	170	248	280	± 0.2	M30	148	176	215	75	37.5	50	G1	33	50	G3/8
160	220	255	70	60	0	1.5	220	310	345	± 0.2	M33	200	233	279	95	48.5	68	G1 1/4	55	50	G1/2
200	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

NG200

Dimensions in mm


Required surface quality of the valve contact surface

1	Throttle check valve (only NG50, 63, 80, 200)
3	Name plate
4	Seal rings
5	Counterflange (separate order, see "dimensional proposal for counterflange")
6	Stroke of main poppet (see "Poppet geometry and determination of the minimum pilot pressure")
7	Note: Valve contact face (e.g. pressing cylinders, bearing structures, etc.) must be sufficiently rigid. The prefill valve must not be loaded by bending.
10	Valve mounting screws (separate order)
11	Threads for transport device (ring bolts), evenly distributed to circumference
12	Measuring point, tightening torque MA = 30 Nm ±10%

Dimensional proposal for counterflange (pos. 5)

Dimensions in mm


Required surface quality of the valve contact surface

Size	32	40	50	63	80	100	125	160	200
Maximum operating pressure pmax 1)	350 bar
Recommended flange material	C22								S355J2G3

1)	When using other counterflanges than the ones specified here, it may be necessary to reduce the operating pressure.

Form of the welding gap (15):

Standard version s ≤ 16 gap form 22 DIN 2559 s > 16 gap form 3 DIN 2559 special version see DIN 2559

NG		Flange						Neck				Raised face
	Ød1	Ød2	ØD	ØD5+2	b	Øk	h1	Ød3	s	r	h2	Ød4	f
	mm 1)	mm	mm	mm	mm	mm	mm	mm	mm 1)	mm	mm	mm	mm
32	48.3	18	150	42	22	110	49	64	3.2	6	7	88	3
40	60.3	18	165	52	29	125	57	75	3.6	6	8	102	3
50	76.1	18	185	70	34	145	64	90	3.6	6	10	122	3
63	88.9	18	200	83	43	160	77	105	3.6	8	12	138	3
80	114.3	22	235	100	51	190	95	134	3.6	8	12	162	3
100	139.7	30	295	124	62	240	116	168	4	8	12	188	3
125	168.3	33	345	148	79	280	138	202	4.5	10	12	218	3
160	219.1	36	415	200	118	345	186	256	5.9	10	16	285	3
200	273	39	420	270	100	355	140	292	6.5	6	16	-	-

1)	For seamless steel pipes, wall thickness 16 according to DIN EN 10220

Valve mounting screws, counterflange (separate order)

	Hexagon socket head cap screw ISO 4762 - 10.9-flZn (or DIN 912 - 10.9-flZn)				Counterflange
Size	Dimensions	Quantity	Tightening torque MA in Nm (±5 %) 1)	Material number	Material number
32	M16 x 100	4	240	R913015640	R900842693
40	M16 x 110	4	240	R913015642	R900825610
50	M16 x 110	8	240	R913015642	R900826441
63	M16 x 130	8	240	R913014713	R900849622
80	M20 x 140	8	460	R913015675	R900862915
100	M27 x 180	8	1150	R913059494	R900834583
125	M30 x 200	8	1600	R913015753	R900861508
160	M33 x 260	12	2200	R913001904	R900846478
200	M36 x 320	16	2600	R913050473	R901205467

1)	Friction coefficient μtotal = 0.09 … 0.14; please adjust in case of changed surfaces; use a manual torque wrench.

Notice:

The information on the hexagon socket head cap screws (type, length, tightening torque) refers exclusively to the use with the counterflanges listed above.

Poppet geometry and determination of the minimum pilot pressure

Dimensions in mm

A1	Effective area of the main poppet
A2	Effective area of the pilot poppet
A3	Effective area of the control spool
s1	Stroke of the main poppet
s2	Stroke of the control spool
F1	Spring force of the valve spring
F2	Spring force of the compression spring of the control spool
Vst	Pilot volume for opening the valve
pÖ	Cracking pressure (pressure differential at the main poppet for overcoming the spring force F1)
pSt	Pilot pressure at port X
pB	System pressure at port B

NG	A1	A2 1)	A3	s1	s2	F1	F2	VstX	Unchecking ratio
	cm²	cm²	cm²	mm	mm	N	N	cm³	Without pre-decompression	With pre-decompression 2)
32	8.04	0.5	2.01	8.5	6.5	9 … 22	58 … 109	1.3	4	0.3
40	13.52	0.79	3.14	10	7	14 … 29	93 … 162	2.2	4.3	0.3
50	21.24	1.13	4.71	12.5	9	23 … 49	149 … 261	4.2	4.5	0.3
63	32.67	1.77	7.07	14.5	11	35 … 63	206 … 348	7.8	4.6	0.3
80	49.02	2.54	10.18	17	13	57 … 127	310 … 579	13.2	4.8	0.3
100	73.13	3.8	15.9	22	15	81 … 193	476 … 952	25.5	4.6	0.2
125	120.76	5.72	28.27	30	22.5	135 … 319	878 … 1,667	59.4	4.3	0.2
160	196.07	9.08	45.36	40	27	241 … 516	1,335 … 2,395	122	4.3	0.2
200	314.16	-	78.54	48	34	425 … 850	2,389 … 3,822	267	4	-

1)	Is omitted for version "without pre-decompression" (ZSF...0...)
2)	Upon request

Example: Type ZSF32...

pB = 30 bar ;

pSt = 4.0 x 30 bar = 120 bar

Nozzle fitting

Size		32	40	50	63	80	100	125	160	200
Nozzle Ø	mm	0.8		0.8 1)		1 1)	1	1.2	1.5	4 1)

1)	Throttle check valve installed at the factory (not version “00”); no nozzle required

ZSF125F0-1-2X/M/01

Manufacturer: Bosch Rexroth

Material #: R901081775

Model : ZSF125F0-1-2X/M/01

More are expected on August 8, 2025

This product is eligible for factory repair.

Type ZSF… (NG32, 40, 100, 125, 160)

Type ZSF… (NG200)

general

hydraulic

Flow qV in l/min (A to B) for different cases of application (Δp = 0,3 bar)

Case of application 1

Case of application 2

Case of application 3

Case of application 4

Case of application 5

Information on case of application 2 to 5

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

Size 32, 40, and 50

Size 63, 80 and 100

Size 125, 160, and 200

Without throttle check valve, NG32, 40, 100, 125, 160

With throttle check valve, NG50, 63, 80

NG200

NG32 … 160

NG200

Dimensional proposal for counterflange (pos. 5)

Valve mounting screws, counterflange (separate order)

Poppet geometry and determination of the minimum pilot pressure

Nozzle fitting

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