LFA32EH2-7X/CA20DQMG24F

Manufacturer: Bosch Rexroth

Material #: R900937370

Model : LFA32EH2-7X/CA20DQMG24F

***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 LFA32EH2-7X/CA20DQMG24F (R900937370) is a sophisticated way cartridge valve designed for seamless integration into compact block systems. This valve is tailored to facilitate a range of functions including pressure, directional, and throttle control by being paired with appropriate pilot control valves. Its modular construction allows for various applications through the combination of a control cover that contains control bores and can optionally include a stroke limitation function, a hydraulically controlled directional seat valve, or a shuttle valve to meet specific overall functions. The LFA32EH2-7X/CA20DQMG24F boasts an installation kit comprising a bushing, ring (up to NG), valve poppet which can come with or without a damping nose, and a closing spring. The functional design of this way cartridge valve is pressure-dependent, creating three significant pressurized areas (A1, A2, A3) that are crucial for its operation. Depending on the version of the cartridge valve, it offers different area ratios which affect the flow dynamics and functionality. This Bosch Rexroth valve ensures high flows with low-pressure drops and rapid switching velocities while maintaining minimal leakage oil flows. It's designed for resilience with high reliability and an extended life cycle. Additional benefits include its compact size and lightweight nature coupled with ease of serviceability. The LFA32EH2-7X/CA20DQMG24F operates optimally at maximum pressures up to bar and can handle maximum flow rates expressed in l/min. It's available in component series X, X, X which provides users with options to select the right version for their specific application needs.

$3,500.00 USD

More are expected on November 29, 2024

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Status: This product is temporarily out of stock.

Qty: Delivered as early as November 29, 2024 when ordered in

This product is eligible for factory repair.

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Functional product design Modular set-up:• Cartridge valve with various options• Control cover in various variants for realization of selected functions• Electric monitoring of the spool 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		EH2	–		/			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 "EH2"	With electrical control of the closed position and stroke limitation incl. installation kit	EH2
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 1.0 bar		10
	Cracking pressure 2.0 bar		20
	Cracking pressure 4.0 bar		40
Damping
07	Valve poppet with damping nose		D
Spool position monitoring
08	Electrical (NG 16…32)		QMG24
	Electrical (NG 40...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)

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.

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	30,2	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
	„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
	„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
	„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
	„CB40“	36,6	38,3	38,6	41,5	43,6	39,4	30,2	32,5	‒	‒

	1) Switching time = 10 ms

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 . EH2… (NG16 … 32)

LFA . EH2… (NG40 … 160)

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 "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG16 … 32

Dimensions in mm

1	Name plate
2	Port X as threaded port
3	Position switch type Q6 (QM at NG40)
4	Angled mating connector (separate order, material no. R900082899)
5	Protective housing

1	Name plate
2	Port X 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

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.

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Control cover "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG40 … 63

Dimensions in mm

1	Name plate
2	Port X as threaded port
3	Position switch type Q6 (QM at NG40)
4	Angled mating connector (separate order, material no. R900082899)
5	Protective housing

1	Name plate
2	Port X 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

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Control cover "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG80 … 100

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)
5	Protective housing

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Control cover "EH2" with electrical control of the closed position and stroke limitation 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)
5	Protective housing
6	4 additional valve mounting screws at NG160

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

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

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

NG	D1	H1	H2	H3	H4	H5	H6	L1	▢ L2	L3	T1	SW1	SW2
NG		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
16	G 1/8	35	50	15	25	126	62	65	80	32.5	8	6	21
25	G1/4	40	50	24	25	130	66	85	85	42.5	12	6	21
32	G1/4	50	50	28	25	150 1)	66	100	100	50	12	10	27

1)	Maximum dimension

NG	D1	H1	H3	H4	H5 1)	H6	▢ L1	L2	T1	SW1	SW2
NG		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
40	G1/2	190	32	25	233	84.5	125	62.5	14	14	46
50	G1/2	210	34	59	255	95	140	70	14	17	55
63	G3/4	246	50	72.5	295	120	180	90	16	24	65

1)	Maximum dimension

NG	D1	ØD2	ØD3	ØD4	H1	H2	H3	H4	H5	H6	H7	T1	SW1	SW2
NG		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
80	G3/4	250	150	200	205	45	40	76.5	305	58	105	16	75	24
100	G1	300	175	245	245	52.5	35	88.5	350	68	140.5	18	75	27

NG	D1	ØD2	ØD3	ØD4	H1	H2	H3	H4	H5	H6	T1	SW1
NG		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
125	G1	230	380	300	100	330	61	40	445	50	18	32
160	G1	300	480	400	167	383	74	38	498	70	18	32

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

LFA32EH2-7X/CA20DQMG24F

Manufacturer: Bosch Rexroth

Material #: R900937370

Model : LFA32EH2-7X/CA20DQMG24F

More are expected on November 29, 2024

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 . EH2… (NG16 … 32)

LFA . EH2… (NG40 … 160)

Inductive position switch type QM

Switching logics

Inductive position switch type Q6

Switching logics

Control cover "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG16 … 32

Control cover "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG40 … 63

Control cover "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG80 … 100

Control cover "EH2" with electrical control of the closed position and stroke limitation incl. installation kit NG125 … 160

Orifice selection

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