LFA50E-7X/CA20DQMG24FX18

Manufacturer: Bosch Rexroth

Material #: R901287197

Model : LFA50E-7X/CA20DQMG24FX18

***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 LFA50E-7X/CA20DQMG24FX18 (R901287197) is a way cartridge valve engineered for integration into a compact block design. This product facilitates efficient hydraulic control by allowing for pressure, directional, and throttle functions or their combinations. The modular design includes a control cover that houses control bores and may include additional features such as stroke limitation, hydraulically controlled directional seat valves, or shuttle valves depending on the overall function required. Furthermore, electrically operated directional spool or seat valves can be incorporated into the control cover. The installation kit of this way cartridge valve comprises components such as a bushing, ring (up to NG), valve poppet with optional damping nose configurations, and a closing spring. The valve's functionality is pressure-dependent, creating three distinct pressurized areas (A1, A2, A3) essential for its operation. These areas have different ratios affecting the valve's response and behavior under various conditions. With high flow capabilities and low pressure drops, this Bosch Rexroth cartridge valve ensures high switching velocities while maintaining minimal leakage oil flows. It boasts robust construction that contributes to high reliability and an extended life cycle. Its compact size and lightweight design make it easy to install and service. This particular model is suitable for use in applications requiring precise hydraulic control within a small footprint. Its flexible design allows for customization through various options in the control cover to meet specific needs. Additionally, electronic monitoring of the switching position is possible with this model, ensuring accurate performance monitoring. In terms of specifications, this way cartridge valve can accommodate maximum operating pressures up to X bar and maximum flow rates of X l/min across its component series X, X2, X3. The versatility offered by the LFA50E-7X/CA20DQMG24FX18 makes it an effective solution for hydraulic systems requiring modularity and performance efficiency.

$5,951.00 USD

More are expected on April 10, 2025

Add to Cart

Status: This product is temporarily out of stock.

Qty: Delivered as early as April 10, 2025 when ordered in

This product is eligible for factory repair.

Start Repair

Functional product design Modular set-up:• Cartridge valve with various options• Control cover in various variants for realization of selected functions• Electronic monitoring of the switching position Power and flow-optimized design:• High flows• Low pressure drops• High switching velocities• Low leakage oil flowsRobust design:• High reliability• Long life cycle Other features:• Small installation size, low weight• Easy to service

2-way cartridge valves are elements that have been designed for a compact block design. The power section with connections A and B is installed into the control block in a receiving hole standardized according to ISO 7368 and closed with a cover. In most cases, the cover is also the connection from the control side of the power section to the pilot control valves.

By control with respective pilot control valves, the power section can be applied for pressure, directional and throttle functions or a combination of these functions. Particularly efficient solutions are realized by adjustment of the size to various flows of the individual ways of an actuator. The application of power sections of elements for multiple functions is very cost-effective.

2-way cartridge valves generally consist of control cover (1) and installation kit (2). The control cover contains the control bores and optionally a stroke limitation function, a hydraulically controlled directional seat valve or a shuttle valve according to the required overall function. Additionally, electrically operated directional spool or seat valves can be installed at a control cover. The installation kit consists of a bushing (3), ring (4) (only up to NG32), valve poppet (5), optionally with damping nose (6) or without damping nose (7) as well as closing spring (8).

The function of 2-way cartridge valves is pressure-dependent. This way, three crucial pressurized areas A1, A2, A3 are realized for the function. The area at valve seat A1 is observed as 100 %. Depending on the version, the annulus area A2 realized by grading is 7 % or 50 % of area A1. The area ratio A1 : A2 is respectively either 14.3 : 1 or 2 : 1. The area A3 is identical to the sum of areas A1 + A2. Due to the different area ratios A1 : A2 and the resulting different annulus areas (A2), the area A3 is one time 107 % and another time 150 % of the area A1 at the seat, which is observed as 100 %.

In general, the following applies:

The areas A1 and A2 are effective in opening direction. The area A3 and the spring are effective in closing direction. The direction of action of the resulting force from the opening and closing forces determines the spool position of the 2-way cartridge valve.

The 2-way cartridge valves can be passed from A to B or from B to A. Pressurization of area A3 by pilot oil discharge from channel B or external pilot oil supply, channel A is blocked without leakage.

01	02	03		04		05	06	07	08	09	10	11	12
LFA		E	–		/			D	Q..24	F

Type
01	Control cover LFA		LFA
Size
02	NG 16		16
	NG 25		25
	NG 32		32
	NG 40		40
	NG 50		50
	NG 63		63
	NG 80		80
	NG 100		100
	NG 125		125
	NG 160		160
Version
03	Control cover version "E"	With electrical control of the closed position incl. installation kit:	E
Component series
04	Component series 70 ... 79 (70 ... 79: unchanged installation and connection dimensions) 1)		7X
	Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) 2)		6X
	Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) 3)		2X
Spool design
05	A1 : A2 = 2 : 1 (annulus area = 50 %; standard version)		CA
	A1 : A2 = 14.3 : 1 (annulus area = 7 %)		CB
Cracking pressure
06	Cracking pressure 0.5 bar (NG 63 and 100 only)		05
	Cracking pressure 1.0 bar		10
	Cracking pressure 2.0 bar		20
	Cracking pressure 3.0 bar (NG125 only)		30
	Cracking pressure 4.0 bar		40
Damping
07	Valve poppet with damping nose		D
Spool position monitoring
08	Electrical (NG 16…63)		QMG24
	Electrical (NG 80...160)		Q6G24
Remote control port
09	With remote control port		F
Nozzle fitting
10	Orifice in channel X 4)		X...
Seal material
11	NBR seals		no code
	FKM seals		V
Ports, plug screws and orifices
12	Metric		no code
	UNC		/12

	1) Component series 7X for sizes 16…63.
	2) Component series 6X for sizes 80 and 100.
	3) Component series 2X for sizes 125 and 160.
	4) This orifice is designed as screw-type orifice. If an orifice is to be installed, the respective code letter with the orifice Ø in 1/10 mm has to be entered in the type designation.
	Example: X12 = Orifice with Ø1.2 mm in channel X.

Version
„CA“	„CB“

Orifice symbol	Symbol in ordering code
A**	A**	This orifice is designed as screw-type orifice. If an orifice is to be installed, the respective code letter with the orifice Ø in 1/10 mm has to be entered in the type designation. Example: A12 = Orifice with Ø1.2 mm in channel A.
Ø1,2		This orifice is designed as bore. No specifications are made in the type designation. (Orifice Ø in mm)
Z12		This orifice is designed as screw-type orifice. This is a standard orifice. No specifications are made in the type designation. (Orifice Ø in 1/10 mm)

Hydraulic fluid		Classification	Suitable sealing materials	Standards
Mineral oils		HL, HLP, HLPD, HVLP, HVLPD	NBR, FKM	DIN 51524
Bio-degradable	Insoluble in water	HETG	NBR, FKM	ISO 15380
	Insoluble in water	HEES	FKM	ISO 15380
	Soluble in water	HEPG	FKM	ISO 15380
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.)! The flash point of the hydraulic fluid used must be 40 K higher than the maximum solenoid surface temperature. Flame-resistant – containing water: Maximum pressure differential at the seat 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 %

Size of the annulus area
Surface in cm2	Version	Size
Surface in cm2	Version	16	25	32	40	50	63	80	100	125	160
A1	„CA“	1,89	4,26	6,79	11,1	19,63	30,02	37,9	63,6	95	160,6
A1	„CB“	2,66	5,73	9,51	15,55	26,42	41,28	52,8	89,1	133,7	224,8
A2	„CA“	0,95	1,89	3,39	5,52	8,64	14,0	18,84	31,4	48	79,9
A2	„CB“	0,18	0,43	0,67	1,07	1,85	2,90	3,94	5,9	9,3	15,7
Spool form (damping nose)
		Size
		16	25	32	40	50	63	80	100	125	160
Stroke	cm	0,9	1,17	1,4	1,9	2,3	2,8	3,0	3,8	4,8	6,5
Pilot volume	cm3	2,56	7,21	14,3	31,6	65,0	124	170	361	687	1563
Theoretical pilot flow 1)	l/min	15,4	43,3	86	190	390	744	1020	2166	4122	9378
Cracking pressure in bar
	Version	Size
	Version	16	25	32	40	50	63	80	100	125	160
Direction of flow A to B	„CA10“	0,70	0,68	0,72	0,71	0,67	0,64	0,88	0,88	0,88	‒
	„CA20“	2,03	2,18	2,12	2,02	2,01	2,0	1,75	1,75	1,76	1,94
	„CA30“	‒	‒	‒	‒	‒	‒	‒	‒	2,05	‒
	„CA40“	3,50	3,90	3,80	4,0	4,11	3,8	3,13	3,04	‒	‒
	„CB10“	0,49	0,50	0,51	0,51	0,48	0,47	0,63	0,63	0,62	‒
	„CB20“	1,44	1,62	1,52	1,44	1,5	1,5	1,26	1,25	1,25	1,4
	„CB30“	‒	‒	‒	‒	‒	‒	‒	‒		‒
	„CB40“	2,48	2,90	2,70	2,86	3,05	2,8	2,25	2,17	‒	‒
Direction of flow B to A	„CA10“	1,38	1,53	1,42	1,43	1,47	1,37	1,77	1,78	1,73	‒
	„CA20“	4,05	4,91	4,25	4,06	4,57	4,33	3,53	3,54	3,50	3,9
	„CA30“	‒	‒	‒	‒	‒	‒	‒	‒	4,0	‒
	„CA40“	6,96	8,74	7,6	8,05	9,34	8,15	6,3	6,2	‒	‒
	„CB10“	7,43	6,69	7,24	7,37	6,88	6,62	8,4	9,4	8,9	‒
	„CB20“	21,3	21,5	21,6	20,9	21,4	20,9	16,9	18,7	17,9	20
	„CB30“	‒	‒	‒	‒	‒	‒	‒	‒	20,7	‒
	„CB40“	36,6	38,3	38,6	41,5	43,6	39,4	30,2	32,5	‒	‒

	1) Switching time = 10 ms

general

Size			16	25	32	40	50	63	80	100	125	160
Ambient temperature range	NBR seals	°C	-30 … +60
Ambient temperature range	FKM seals	°C	-20 … +60
MTTFD values according to EN ISO 13849 1)		Years	150

1)	For further details, see data sheet 08012

hydraulic

Size			16	25	32	40	50	63	80	100	125	160
Maximum operating pressure	Without directional valve	bar	400						420
	Anschluss A 1)	bar	315 350
	Port B 1)	bar	315 350
	Port X 1)	bar	315 350
	With electrically monitored spool position	bar	400						420
Maximum flow 2)		l/min	25000
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
	FKM seals	°C	-20 … +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)	dependent on the attached directional valve
2)	NG-dependent; see characteristic curves
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.

For applications outside these parameters, please consult us!

(simulated with HLP46, ϑoil = 40±5 °C)

Size 16 (A → B)

Size 16 (B → A)

Size 25 (A → B)

Size 25 (B → A)

Size 32 (A → B)

Size 32 (B → A)

Size 40 (A → B)

Size 40 (B → A)

Size 50 (A → B)

Size 50 (B → A)

Size 63 (A → B)

Size 63 (B → A)

Size 80 (A → B)

Size 80 (B → A)

Size 100 (A → B)

Size 100 (B → A)

Size 125 (A → B)

Size 125 (B → A)

Size 160 (A → B)

Size 160 (B → A)

Notice:

The indicated characteristic curves have been determined without inserted springs.

Orifices
Thread	Orifice Ø in mm
M6 conical	0,5 … 3,0
M8 x 1 conical	0,5 … 4,0
G3/8	0,8 … 6,0
G1/2	1,0 … 8,0

Other orifices upon request.

Plug screws
Thread	Tightening torqueMA in Nm
M6	–
M8 x 1	7
G3/8	55
G1/2	80
G3/4	135
G1	225
G1 1/4	360

LFA..E...(NG16...63)

Inductive position switch type QM

The electrical connection is realized via a 4-pole mating connector (separate order) with connection thread M12 x 1.

electrical

Connection voltage (DC voltage)	Connection voltage (DC voltage)	V	24
			+30 %/-15 %
Admissible residual ripple		%	≤ 10
Max. load capacity		mA	400
Switching outputs			PNP transistor outputs, load between switching outputs and GND
Pinout	1		+24 V
	2		Switching output: 400 mA
	3		0 V, GND
	4		Switching output: 400 mA

Switching logics

Inductive position switch type Q6

Connection voltage (DC voltage)	Connection voltage (DC voltage)	V	24
			+30 %/-15 %
Admissible residual ripple		%	≤ 10
Max. load capacity		mA	200
Switching outputs			PNP transistor outputs, load between switching outputs and GND
Pinout	1		+24 V
	2		free
	3		0 V, GND
	4		Switching output: 200 mA

Switching logics

Cartridge element (design as seat valve with damping noses)

Cartridge valves are hydraulically controlled seat or spool valves with two working ports A and B and one control port X or two control ports X and Z for the version with differential spool. Y is generally the leakage oil connection. The valves are available in sizes 16, 25, 32, 40, 50, 63, 80, 100, 125 and 160.

Criteria for determination of the size include the flow to be controlled as well as flow resistance values of cartridge valves and their area ratios.

Control cover

By means of control cover (2), the bore of the cartridge elements is closed. They also serve as connection element between cartridge valve and pilot control valve.

Pilot control valve

At control covers for set-up of a directional spool valve (3) or seat valve (4), the porting pattern is realized according to ISO 4401 and DIN 24340.

The cartridge element (1) and the control cover (2) form a functional unit. It is calibrated at the factory and must not be disassembled or combined with other third-party components.

The closed spool position is monitored by the attached position switch (5).

Control cover "E" with electrical control of the closed position incl. installation kit: NG16 … 63

Dimensions in mm

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Notice:

The tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10 %). The specified tightening torques were calculated with total friction coefficient μ = 0.14; adjust in case of modified surfaces.

1	Name plate
2	Port X optionally as threaded port
3	Position switch type QM
4	Angled mating connector (separate order, material no. R900082899)
5	Space required to remove the mating connector
6	Protective housing
7	Representation without position switch

Hexagon socket head cap screws ISO 4762 - 10.9
Size	Quantity	Tightening torqueMA in Nm
16	4	32
25	4	110
32	4	270
40	4	520
50	4	520
63	4	1800
80	8	900
100	8	1800
125	8	3100
160	12	5000

NG	D1	D2	H1	H2	H3	H4	H5	▢ L1	▢ L2		T1
NG			mm	mm	mm	mm	mm	mm	mm	mm	mm
16	G 1/8	M6	50	12	15	78	105	65	46	± 0.1	8
25	G1/4	M6	50	16	24	78	105	85	58	± 0.15	12
32	G1/4	M6	70	16	28	78	105	100	70	± 0.15	12
40	G1/2	M8 x 1	110	83	32	98	123	125	85	± 0.2	14
50	G1/2	M8 x 1	120	93	34	98	123	140	100	± 0.2	14
63	G3/4	M8 x 1	150	113	50	98	123	180	125	± 0.2	16

Control cover "E" with electrical control of the closed position incl. installation kit: NG80 … 100

Dimensions in mm

1	Name plate
2	Port X optionally as threaded port
3	Position switch type Q6
4	Angled mating connector (separate order, material no. R900082899)
5	Space required to remove the mating connector

NG	D1	ØD2	ØD3	ØD4		H1	H2	H3	H4	H5	H6	L1	T1
NG		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
80	G1/2	250	150	200	± 0.2	205	45	40	76.5	220	105	38	14
100	G1	300	175	245	± 0.3	245	52.5	35	88.5	250	140.5	29.5	18

Control cover "E" with electrical control of the closed position incl. installation kit: NG125 … 160

Dimensions in mm

1	Name plate
2	Port X as threaded port
3	Position switch type Q6
4	Angled mating connector (separate order, material no. R900082899)
6	Protective housing
7	4 additional valve mounting screws at NG160

NG	D1	ØD3	ØD4		H1		H2	H3	H4	H5	T1
NG		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
125	G1	230	300	± 0.2	300	± 0.15	61	50	100	310	18
160	G3/4	200	400	± 0.3	425	± 0.15	74	60	150	344	18

Inductive position switches

Contactless position switches with integrated switching amplifiers are switched shortly before reaching the spool position to be monitored. The spool position reached is displayed by a binary signal.

Advantages of the position switches:

Short-circuit-proof Direct monitoring of the spool position at the control spool. Long life cycle High reliability due to no use of dynamic seals Reaction time of the switch upon operation approx. 15 ms.

Notice:

Valves with inductive position switches and proximity sensors in safety-relevant controls may only be assembled and commissioned by hydraulically and electrically trained specialists. Service work requires special tools and equipment. This work may only be performed by authorized specialists or in the factory!

Improper work at safety equipment leads to a risk of personal injury and damage to property!

The valve components are coordinated in the production plant and adjusted during assembly. They must not be interchanged. In case of valve or position switch defects, the complete valve must be exchanged! The factory setting of the position switch must not be changed. The position switch may only be set by Bosch Rexroth. The position switch must be automatically monitored by the machine control to prevent initiation of a new machine cycle even in case of a defect at the position switch.

Orifice selection

Spare parts & repair

LFA50E-7X/CA20DQMG24FX18

Manufacturer: Bosch Rexroth

Material #: R901287197

Model : LFA50E-7X/CA20DQMG24FX18

More are expected on April 10, 2025

This product is eligible for factory repair.

general

hydraulic

(simulated with HLP46, ϑoil = 40±5 °C)

Size 16 (A → B)

Size 16 (B → A)

Size 25 (A → B)

Size 25 (B → A)

Size 32 (A → B)

Size 32 (B → A)

Size 40 (A → B)

Size 40 (B → A)

Size 50 (A → B)

Size 50 (B → A)

Size 63 (A → B)

Size 63 (B → A)

Size 80 (A → B)

Size 80 (B → A)

Size 100 (A → B)

Size 100 (B → A)

Size 125 (A → B)

Size 125 (B → A)

Size 160 (A → B)

Size 160 (B → A)

LFA..E...(NG16...63)

Inductive position switch type QM

Switching logics

Inductive position switch type Q6

Switching logics

Control cover "E" with electrical control of the closed position incl. installation kit: NG16 … 63

Control cover "E" with electrical control of the closed position incl. installation kit: NG80 … 100

Control cover "E" with electrical control of the closed position incl. installation kit: NG125 … 160

Orifice selection

Related Products

Information

Account