BOSCH REXROTH
R900500257

$826.56 USD

BOSCH REXROTH
Material:R900500257
Model:DR10DP1-4X/75Y

Quantity in stock: 0

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***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 DR10DP1-4X/75Y (R900500257) is a direct operated pressure reducing valve, designed for subplate mounting with porting patterns in accordance with DIN Form D and ISO standards. This valve ensures the limitation of system pressure by maintaining secondary circuit pressure through an adjustable control mechanism. In its initial position, the valve allows unrestricted flow from channel B to channel A, while the secondary pressure is set via an adjustment type. The DR10DP1-4X/75Y features an open design that permits hydraulic fluid to flow freely until the set pressure threshold is reached. At this point, a control spool actuates to maintain a constant level of pressure in channel A. The internal signal and pilot oil are supplied via the control line from channel A, ensuring efficient operation. If an external force increases the pressure in channel A beyond the set point, the control spool moves against a compression spring to connect channel A with channel TY, allowing excess hydraulic fluid to discharge into the tank and preventing any significant rise in pressure. Leakage oil from the spring chamber must be discharged externally through channel TY. An optional check valve can be installed for free flow back from channel A to B. Additionally, there's a provision for a pressure gauge connection that facilitates monitoring of secondary pressure. The model offers different adjustment types including rotary knob options (with or without scale), threaded pin with hexagon and protective cap, and lockable rotary knob with scale. It is available in various sizes and component series X, capable of handling maximum operating pressures up to bar levels and maximum flow rates expressed in liters per minute (l/min). The inclusion of optional features such as a check valve enhances its versatility for various hydraulic applications.

The valve type DR 10 DP is a direct operated pressure reducing valve in 3-way version, i. e. with pressure limitation of the secondary circuit.

It is used to limit a system pressure.

The secondary pressure is set via the adjustment type (1).

The valve is open in initial position. Hydraulic fluid can flow from channel B to channel A without restrictions. The pressure in channel A is simultaneously applied via the control line (4) at the piston area opposite the compression spring (3). If the pressure in channel A exceeds the value set at the compression spring (3), the control spool (2) moves to control position and keeps the set pressure in channel A at a constant level.

Signal and pilot oil are supplied internally via the control line (4) from channel A.

If the pressure in channel A increases further due to an external force effect at the actuator, it pushes the control spool (2) even further against the compression spring (3).

In this way, channel A is connected to channel T(Y) via the control edge (5) at the control spool (2). So much hydraulic fluid is discharged into the tank that the pressure can only increase slightly.

The leakage oil discharge from the spring chamber (6) is always effected externally via channel T(Y).

For the free flow back from channel A to channel B, a check valve (7) can optionally be installed.

A pressure gauge connection (8) allows for the control of the secondary pressure.

Type DR 10 DP1-4X/.Y…

technical illustration-R900500257-For subplate mounting Porting pattern according to DIN 24340 Form D and ISO  5781-06-07-0-00 4 optional adjustment types:• Rotary knob• Threaded pin with hexagon and protective cap• Lockable rotary knob with scale• Rotary knob with scale 4 pressure ratings With pressure gauge connection Check valve, optional

01	02		03		04	05	06	07	08
DR 10 DP		–	4X	/		Y			*

01	Pressure reducing valve, direct operated, size 10	DR 10 DP
Adjustment type
02	Rotary knob	1
	Grub screw with hexagon and protective cap	2
	Lockable rotary knob with scale	31)
	Rotary knob with scale	7
03	Component series 40 … 49 (40 … 49: unchanged installation and mounting dimensions)	4X
04	Maximum secondary pressure 25 bar	25
	Maximum secondary pressure 75 bar	75
	Maximum secondary pressure 150 bar	150
	Maximum secondary pressure 210 bar	210
05	Internal pilot oil supply, external leakage oil discharge	Y
06	With check valve	no code
06	Without check valve	M
Seal material
07	NBR seals	no code
07	FKM seals (other seals on request) Attention! Observe compatibility of seals with the hydraulic fluid used!	V
08	Further details in the plain text	*

1) H-key with material no. R900008158 is included in the scope of delivery.

Preferred types and standard units are contained in the EPS (standard price list).

general

Size			10
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +50
Ambient temperature range	FKM seals	°C	-20 … +50
Weight		kg	3

hydraulic

Size			10
Maximum operating pressure	Port B	bar	315
Maximum secondary pressure	Port A	bar	25 75 150 210
Maximum counter pressure	Port T (Y)	bar	160
Maximum flow		l/min	80
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
Hydraulic fluid temperature range	FKM seal	°C	-20 … +80
Viscosity range		mm²/s	10 … 800
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 oils and related hydrocarbons		HL, HLP, HLPD	NBR, FKM	DIN 51524
Environmentally compatible	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.)! Flame-resistant – containing water: Maximum operating pressure 210 bar Maximum hydraulic fluid temperature 60 °C Expected life cycle as compared to HLP hydraulic oil 30 % to 100 %

For applications outside these parameters, please consult us!

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

pA-qV characteristic curves

Δp-qV characteristic curves

Notice!

The curve development is maintained if the pressure is set lower according to the pressure rating.

The characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range.

Version "M"

Without check valve

Version "no code"

With check valve

Dimensions in mm

1	Name plate
2	Adjustment type "1"
3	Adjustment type "2"
4	Adjustment type "3"
5	Adjustment type "7"
6	Space required to remove the key
7	Valve mounting bores
8	Lock nut SW24
9	Hexagon SW10
10	Identical seal rings for ports A, B, P, T (Y)
11	Pressure gauge connection G1/4; 12 mm deep; internal hexagon SW6
12	Locking pin
13	Porting pattern according to DIN 24340 form D and ISO 5781-06-07-0-00

Subplates (separate order)

G 460/01 (G3/8)

G 461/01 (G1/2)

Valve mounting screws (separate order)

4 metric hexagon socket head cap screws

ISO 4762 - M10 x 60 - 10.9-flZn-240h-L

with friction coefficient μtotal = 0.09 to 0.14,

tightening torque MA = 60 Nm ± 10%,

material no. R912000116

BOSCH REXROTHR900500257