BOSCH REXROTH
R900928810

$498.96 USD

BOSCH REXROTH
Material:R900928810
Model:LC25DR50E7X/

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.

***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 LC25DR50E7X/ (R900928810) is a high-performance way cartridge valve designed for pressure functions, incorporating advanced pilot-operated technology in both seat and spool designs. This power section, crafted as a cartridge valve, is intended for standardized insertion into receiving holes according to DIN ISO specifications and is securely sealed with a control cover. This model features an integrated pilot control valve that can be manipulated manually or through electrically proportional pressure adjustments. The pilot control valve is either built into the control cover or mounted on it as per DIN mounting dimensions, facilitating various pressure function configurations. One of the key capabilities of the LC25DR50E7X/ is its pressure reducing function, which maintains an open rest position. The spool valve design for this function does not have an area difference at port B, ensuring no effective areas are present. For the pilot control valve, it uses the same cover types as those found in the pressure relief function—type LFA..DB.... The operational dynamics involve directing the effective pressure from port A through a pilot oil supply orifice to the spring side of the spool. Below a certain performance limit and predetermined pressure at the pilot control valve, this model maintains its spool in an open position balanced by spring force. This allows free flow from port B to port A. Upon achieving the set pressure level, the spool closes off, reducing the pressure at port A based on specific pressure-flow characteristics. This particular model boasts a size that supports a maximum flow rate measured in liters per minute (l/min), optimized for precise and efficient performance across various applications requiring controlled pressure management.

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 open

The cartridge valve for the pressure reducing function is designed as spool valve without area difference (no effective areas at port B).

As pilot control valve, identical cover types as for the pressure relief function are applied (type LFA..DB...).

The effective pressure at port A is directed via the pilot oil supply orifice to the spring side of the spool. Under the performance limit and the pressure set at the pilot control valve, the spool is pressure-compensated and retained in open position by the spring force to enable free flow from port B to port A.

On reaching the set pressure, the spool is closed and the pressure at port A is reduced according to the pressure-flow characteristics.

Type
01	Cartridge valve	LC
Size
02	NG 16	16
	NG 25	25
	NG 32	32
	NG 40	40
	NG 50	50
	NG 63	63
Version
03	Pressure relief function	DR
Cracking pressure
04	Cracking pressure 0 bar (without spring)	00
	Cracking pressure approx. 2 bar	20
	Cracking pressure approx. 3 bar 1)	30
	Cracking pressure approx. 4 bar	40
	Cracking pressure approx. 5 bar (NG16, 25 and 32 only)	50
	Cracking pressure approx. 8 bar 2)	80
Damping
05	Piston without precision grooves	E
Component series
06	Component series 70 ... 79 (70 ... 79: unchanged installation and connection dimensions)	7X
Seal material
07	NBR seals	no code
07	FKM seals	V

01	02	03	04	05	06		07
LC		DR		E	7X	/

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

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

hydraulic

Size			16	25	32	40	50	63
Maximum operating pressure	Port A	bar	315
Maximum operating pressure	Port B	bar	315
Maximum flow	LC..DR20.../..	l/min	100	200	300	750	1000	1600
Maximum flow	LC..DR40.../..	l/min	150	300	450	1000	1300	2000
Hydraulic fluid			Mineral oil (HL, HLP) according to DIN 51524; fast biodegradable hydraulic fluids according to VDMA 24568 ; HETG (rape seed oil); HEPG (polyglycols); HEES (synthetic esters), other hydraulic fluids on request
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
Hydraulic fluid temperature range	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.

For applications outside these parameters, please consult us!

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

LC 16 DR…

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

LC 25 DR…

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

LC 32 DR…

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

LC 40 DR…

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

LC 50 DR…

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

LC 63 DR…

Version "E"		Version “D”
Area ratio A1 : A2 = 2 : 1 Version "…A.E…"	Area ratio A1 : A2 = 14.3 : 1 Version "…B.E…"	Area ratio A1 : A2 = 2 : 1 Version "…A.D…"	Area ratio A1 : A2 = 14.3 : 1 Version "…B.D…"

Installation bore and connection dimensions according to ISO 7368

Dimensions in mm

1	Depth of fit
2	Control dimension
3	If a different diameter is used for port B than ØD3 or (ØD3*), the distance from the cover support surface to the bore center must be calculated.
4	Port B may be positioned around the central axis of port A. However, it must be observed that the mounting bores and the control bores are not damaged.
7	At Ø ≤45 mm → Fitting H8 admissible

NG	ØD1		ØD2	ØD3/(ØD3*)	ØD4		ØD5	ØD6 1)	ØD7		H1/(H1*)	H2	H3	H4	H5	H6	H7	H8	H9	L1	L2	L3	L4	L5	W
NG	mm		mm	mm	mm			mm	mm		mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
16	32	H7 -	16	16 25	25	H7 -	M8	8	4	H13 -	35 29.5	56	43	20	11	2	20	2	0.5	65 80	46	23	25	10.5	0.05
25	45	H7 -	25	25 32	34	H7 -	M12	6	6	H13 -	44 40.5	72	58	25	12	2.5	30	2.5	1	85 -	58	29	33	16	0.05
32	60	H7 -	32	32 40	45	H7 -	M16	8	6	H13 -	52 48	85	70	35	13	2.5	30	2.5	1.5	102 -	70	35	41	17	0.1
40	75	H7 -	40	40 50	55	H7 -	M20	10	6	H13 -	64 59	105	87	45	15	3	30	3	2.5	125 -	85	42.5	50	23	0.1
50	90	H7 -	50	50 63	68	H7 -	M20	10	8	H13 -	72 65.5	122	100	45	17	3	35	4	2.5	140 -	100	50	58	30	0.1
63	120	H7 -	63	63 80	90	H7 -	M30	12	8	H13 -	95 86.5	155	130	65	20	4	40	4	3	180 -	125	62.5	75	38	0.2

1)	Maximum dimension

BOSCH REXROTHR900928810

hydraulic