LOGIC COVER LFA25DR1-7X/025

Manufacturer: Bosch Rexroth

Material #: R901292743

Model : LFA25DR1-7X/025

***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 LFA25DR1-7X/025 (R901292743) is a manual pressure reduction control cover designed for use with way cartridge valves. This product is crafted to provide reliable pressure reduction in hydraulic systems by working in conjunction with a way cartridge valve as indicated by the hydraulic symbol. With a maximum pressure capacity and subplate mounting type of connection, it adheres to ISO connection diagram standards, ensuring compatibility and ease of integration into various hydraulic systems. The LFA25DR1-7X/025 is equipped with NBR seals and is suitable for hydraulic fluids such as HL, HLP, HLPD, HVLP, HVLPD, and HFC. The product boasts a manual type of actuation for precise control over pressure adjustments. The weight specification ensures that it can be easily handled during installation or maintenance procedures. This control cover is part of Bosch Rexroth's product group that includes pilot-operated valves in seat or spool design. These valves are installed into standardized receiving holes according to DIN ISO and are secured with this control cover. The integrated pilot control valve allows for manual or electrically proportional pressure adjustment directly on the control cover or as an externally mounted pilot valve following DIN standards. When combined with cartridge valves, the LFA25DR1-7X/025 enables various pressure functions to be realized within hydraulic systems. It features a rest position that is closed until activated for the pressure reducing function with an opening characteristic. The device ensures that any potential pressure increases on the secondary side are effectively managed and discharged safely back to the tank through a third-way pilot control valve setup. Overall, the Bosch Rexroth LFA25DR1-7X/025 (R901292743) offers a robust solution for controlling and reducing hydraulic pressures within complex systems, providing both versatility and reliability in its application.

$1,438.00 USD

More are expected on February 10, 2025

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Status: This product is temporarily out of stock.

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

This product is eligible for factory repair.

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LOGIC COVER LFA25DR1-7X/025

Size 25, manual pressure reduction

Control cover for 2-way cartridge valves Reliable reduction of the pressure in connection with a 2-way cartridge valve according to the hydraulic symbol.

Unpacked Weight: 3.580 kg

General

2-way cartridge valves for pressure functions are pilot-operated valves in seat or spool design. The power section designed as cartridge valve (1) is installed into a receiving hole standardized according to DIN ISO 7368 and closed with a control cover (2).

The pilot control valve (4) for manual or electrically proportional pressure adjustment is integrated into the control cover (2) or is installed on the control cover (2) as pilot valve with mounting dimensions according to DIN 24 340.

By combination of cartridge valves with the control covers, different pressure functions can be realized. .

Pressure reducing function

Rest position closed

For the pressure reducing function with opening characteristic, a pressure limitation cartridge valve (type LC..DB40D...) and a control cover with a pressure reducing pilot control valve (type LFA..DR...) are applied. The pilot oil is directed from port A via the supply orifice and the opened pilot control valve to side B.

The main spool is opened and the flow from port A to port B is released.

On reaching the set pressure, the spool is closed and the pressure at port B is reduced according to the pressure-flow characteristics. Potential pressure increases on the secondary side are discharged to the tank via the 3rd way of the pilot control valve. Set-up of a directional valve enables realization of an additional blocking function (type LFA..DRW...).

Size 16 … 100
Maximum operating pressure 420 bar

Data Sheet	Download Data Sheet
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual

Max. pressure	350
Productgroup ID	9,10,11,12,13,14
Type of actuation	Manual pressure reduction
Size	25
Type of connection	Subplate mounting
Connection diagram	ISO 7368
Weight	3.580
Seals	NBR
Hydraulic fluid	HL,HLP,HLPD,HVLP,HVLPD,HFC

Control cover for pressure reducing function

01	02	03	04		05		06	07
LFA		DR		‒	7X	/

Type
01	Control cover LFA	LFA
Size
02	NG 16	16
	NG 25	25
	NG 32	63
	NG 40	40
	NG 50	50
	NG 63	63
Version
03	Pressure reducing function - Main spool in rest position closed (LC..DB 40 D..- separate order)	DR
Adjustment type for pressure adjustment
04	Rotary knob	1
	Sleeve with hexagon and protective cap	2
	Lockable rotary knob with scale, incl. H-key	3
	Rotary knob with scale	4
Component series
Component series
05	Component series 70 ... 79 (70 ... 79: unchanged installation and connection dimensions)	7X
Pressure rating DBmax. (observe admissible pressure of the pilot control valve)
06	Set pressure up to 25 bar	025
	Set pressure up to 75 bar	075
	Set pressure up to 150 bar	150
	Set pressure up to 210 bar	210
	Set pressure up to 315 bar	315
Seal material
07	NBR seals	no code
07	FKM seals	V

Additional preferred types and standard units are specified in the EPS (standard price list).

Main spool in rest position closed - LC..DB 40 D..- separate order

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

hydraulic

Size			16	25	32	40	50	63
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	2.8 … 380
Maximum admissible degree of contamination of the hydraulic fluid 1)			Class 20/18/15 according to ISO 4406 (c)

1)	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 oil		HL, HLP	FKM, NBR	DIN 51524
Bio-degradable	Insoluble in water	HEES (synthetic esters)	FKM	VDMA 24568
	Insoluble in water	HETG (rape seed oil)	FKM, NBR	VDMA 24568
	Soluble in water	HEPG (polyglycols)	FKM	VDMA 24568
Other hydraulic fluids on request

Control cover

Size				16	25	32	40	50	63
maximum admissible operating pressure in port ...	...X (primary pressure)		bar	315
	...Y (secondary pressure = max. set pressure)		bar	315
	...Z2	static	bar	60
		at pressure control		depressurized (up to ≈ 2 bar)

For applications outside these parameters, please consult us!

LFA..DR.-7X/...NG 16

LFA..DR.-7X/...NG 25, 32

LFA..DR.-7X/...NG 40, 50

LFA..DR.-7X/...NG 63

Attention!

Control covers type LFA..DR... are combined with 2-way cartridge valves type LC..DB 40 D... (see ordering code).

The control covers are equipped with standard orifice fitting – optimized in our test area. Orifice specification in the type key is not necessary. Deviating operating conditions may require respective adjustment of the orifice size. The orifices are designed as screw-type orifices.

Orifice representation in symbol

(basic symbol) - Pressure reducing function

Installation bore and connection dimensions according to ISO 7368

NG16 ... 63

Dimensions in mm

5	Bore for locating pin (cover pin assembled according to DIN 24 342)
6	Information on porting pattern NG 16: Length L1 (axis x–y bores) is 80 mm
8	Bore for locating pin at function as main pressure relief valve (reposition cover pin for assembly accordingly)

NG 16, 25, 32

Dimensions in mm

1	Port X optionally as threaded port (at NG 16...50)
3.1	Port Z1 optionally as threaded port (at LFA..DREZ.. , LFA..DREWZ..., NG 25..63)
4	Locating pin
9.1	Name plate (NG16)
9.2	Name plate (NG 25, 32)

NG 40, 50

Dimensions in mm

1	Port X optionally as threaded port (at NG 16...50)
2	Port Y optionally as threaded port (at NG 40, 50)
3.1	Port Z1 optionally as threaded port (at LFA..DREZ.. , LFA..DREWZ..., NG 25..63)
3.2	Port Z2 optionally as threaded port (at NG 40, 50, 63)
4	Locating pin
9.3	Name plate (NG 40, 50, 63)
10	Check valve (at NG 63 orifice F in poppet)

NG63

Dimensions in mm

3.1	Port Z1 optionally as threaded port (at LFA..DREZ.. , LFA..DREWZ..., NG 25..63)
3.2	Port Z2 optionally as threaded port (at NG 40, 50, 63)
4	Locating pin
9.3	Name plate (NG 40, 50, 63)
10	Check valve (at NG 63 orifice F in poppet)
11	At control cover NG 63, logic element NG 16

NG16 ... 63

Dimensions in mm

5.1	Adjustment element "4"
5.2	Adjustment element "3"
6	Adjustment element "2"
7	Adjustment element "1"
8	direct operated pressure reducing valve (included in the scope of delivery)
9	Name plate of the pressure reducing valve
11	Valve mounting screws M5x50 DIN 912-10.9 MA = 8.9 Nm are included in the scope of delivery of the control cover
12	Pressure gauge connection G1/4; 12 mm deep; internal hexagon SW6
13	Space required to remove the key
14	Control cover
15	Lock nut SW24
16	at type .../315 → 50 mm

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Mounting screws (included in scope of delivery)
Hexagon socket head cap screw according to DIN 912-10.9
NG	Quantity	Dimensions	Tightening torque in Nm
16	4	M 8 x 45	32
25	4	M 12 x 50	110
32	4	M 16 x 60	270
40	4	M 20 x 70	520
50	4	M 20 x 80	520
63	4	M 30 x 100	1800

NG	H1	H2	H3	L1	L2	L3	L7
NG	mm	mm	mm	mm	mm	mm	mm
16	40 -	17 -	15	65 -	80	36.5	49
25	40 -	19 -	24	85 -	85	49	59
32	50 -	26 -	28	100 -	100	56.5	66.5

Valve dimensions

NG	Ø Orifice A**	Ø Orifice X** 1)	Ø Orifice F**	Ø Orifice D**		L8		L9		L10		L11		L12
	Ø Orifice A**	Ø Orifice X** 1)	Ø Orifice F**		.../315		.../315		.../315		.../315		.../315		.../315
	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
16	-	2.5	-	0.8 1)	0.8 1)	22	30.5	119.5	116.5	143.5	140.5	99.5	96.5	99.5	96.5
25	-	-	0.8 1)	3 2)	1.8 2)	5.5	14	131	128	155	152	111	108	111	108
32	-	-	1 1)	3 2)	1.8 2)	-	6	123.5	120.5	148.5	145.5	103.5	100.5	103.5	100.5
40	-	-	1.2 1)	3 2)	1.8 2)	-	-	111	108	135	132	91	88	91	88
50	-	-	1.5 1)	3 2)	1.8 2)	-	-	103.5	100.5	128.5	125.5	83.5	80.5	83.5	80.5
63	2 1)	-	1.5 1)	3 1)	1.8 1)	-	-	87.5	84.5	111.5	108.5	67.5	64.5	67.5	64.5

1)	Orifice Ø, orifice M6 conical
2)	Orifice Ø, orifice M8 x 1 conical

NG	H1	H2	H3	H4	H5	L1	L2	L3	L4	L5	L7
NG	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
40	60 -	30 -	32	40	40	125 -	125	72	62.5	62.5	79
50	68 -	32 -	34	32	32	140 -	140	80	70	70	86.5

LOGIC COVER LFA25DR1-7X/025

Manufacturer: Bosch Rexroth

Material #: R901292743

Model : LFA25DR1-7X/025

More are expected on February 10, 2025

This product is eligible for factory repair.

Control cover for pressure reducing function

general

hydraulic

Control cover

LFA..DR.-7X/...NG 16

LFA..DR.-7X/...NG 25, 32

LFA..DR.-7X/...NG 40, 50

LFA..DR.-7X/...NG 63

Installation bore and connection dimensions according to ISO 7368

NG16 ... 63

NG 16, 25, 32

NG 40, 50

NG63

NG16 ... 63

Valve dimensions

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