BOSCH REXROTH
R900973873

BOSCH REXROTH
Material:R900973873
Model:3DR10P5-6X/50Y/00V

Due to extremely high demand, please call 877-366-7226 for availability

***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 3DR10P5-6X/50Y/00V (R900973873) is a sophisticated pressure reducing valve designed to effectively manage and reduce system pressure in hydraulic circuits. The valve, which is pilot-operated, ensures the limitation of the secondary circuit's pressure through its main valve with a control spool and a pilot control valve that includes a pressure adjustment element. In its initial position, the 3DR10P5-6X/50Y/00V allows unrestricted flow from channel P to A, while simultaneously applying pressure to the piston area opposite the compression spring through a bore. This action also affects the spring-loaded side of the control spool and the ball in the pilot control valve. The setting of the compression spring determines when pressure will build up and hold the control spool in an open position, allowing fluid to flow until a balance is achieved between channel A's pressure and that set on the compression spring. This balance ensures that if any external force increases channel A's pressure, the control spool will move towards a closed position to maintain desired reduced pressure levels. Additionally, should this pressure increase further, hydraulic fluid is discharged into the tank via channel T to prevent any further increase. For monitoring purposes, there's a gauge connection available for checking reduced pressure in channel A. The valve is designed for subplate mounting with porting patterns conforming to DIN form A, ISO and CETOP RP 121 H standards. It comes with different adjustment elements including rotary knobs and sleeves with protective caps for precise adjustments. With its maximum operating pressure of bar and maximum flow rate of l/min, this Bosch Rexroth valve stands out for its reliability in maintaining system pressures within desired parameters across various applications.

The pressure valve type 3DR is a pilot-operated 3-way pressure reducing valve with pressure limitation of the secondary circuit. It is used to reduce the system pressure.

The pressure reducing valve basically consists of the main valve (1) with control spool (2) and pilot control valve (3) with pressure adjustment element (10).

The valve is open in initial position. Hydraulic fluid can flow from channel P to channel A without restrictions. The pressure in channel A is simultaneously applied via the bore (4) at the piston area opposite the compression spring (9). Simultaneously, pressure is applied via the nozzle (6) to the spring-loaded side of the control spool (2) and via channel (5) to

ball (7) in the pilot control valve (3). Depending on the setting of the compression spring (11), pressure builds up upstream of the ball (7) and in channel (5) holding the control spool (2) in open position. Hydraulic fluid flows from channel P via the control spool (2) to channel A until a pressure builds up in channel A exceeding the pressure value set at the compression spring (11) and opening the ball (7).

The control spool (2) moves to closed position. The desired reduced pressure is reached if there is a balance between the pressure in channel A and the pressure value set at the compression spring (11).

If the pressure in channel A increases further due to an external force effect at the actuator, the control spool (2) is pushed further against the compression spring (9). In this way, channel A is connected to channel T via the control edge (8) at the control spool (2). So much hydraulic fluid is discharged into the tank that the pressure can no longer increase. The pilot oil return from the spring chamber (12) is always realized externally via the control line (13) at port Y. A depressurized connection to the tank must always be ensured.

The pressure gauge connection (14) enables control of the reduced pressure in channel A.

Type 3DR 10 P4–6X/…

technical illustration-R900973873-Valve for reduction (P to A) and limitation (A to T) of a system pressure For subplate mounting, porting pattern according to DIN 24 340 form A, ISO 4401 and CETOP-RP 121 H, subplates (separate order) 4 pressure ratings 4 adjustment elements:<br>
• Rotary knob<br>
• Sleeve with hexagon and protective cap<br>
• Lockable rotary knob with scale<br>
• Rotary knob with scale

01	02	03	04		05		06	07		08	09	10
3DR	10	P		–	6X	/		Y	/	00		*

01	3-way pressure reducing valve	3DR
02	Size 10	10
03	Subplate mounting	P
Adjustment element
04	Rotary knob	4
	Sleeve with hexagon and protective cap	5
	Lockable rotary knob with scale	6 1)
	Rotary knob with scale	7
05	Series 60 to 69 (60 to 69: unchanged installation and connection dimensions)	6X
06	Set pressure up to 50 bar	50
	Set pressure up to 100 bar	100
	Set pressure up to 200 bar	200
	Set pressure up to 315 bar	315
Pilot oil flow
07	Internal pilot oil supply, external pilot oil return	Y
08	With stroke limitation	00
09	NBR seals	M
	FKM seals (other seals upon request)	V
	Observe compatibility of seals with hydraulic fluid used.
10	Further details in the plain text	*

	1) H-key with material no. 00008158 is included in the scope of delivery.

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

general

Size		10
Weight	kg	6
Installation position		any
Direction of flow		see symbol
Ambient temperature range	°C	-30 … +50

hydraulic

Size			10
Nominal pressure		bar	315
Maximum operating pressure	Port P	bar	315
	Anschluss A	bar	315
	Port Y		separate and depressurized to the tank
Set pressure	Minimum		flow-dependent, see characteristic curves
Set pressure	Maximum	bar	50 100 200 315
Maximum flow		l/min	120
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
Hydraulic fluid temperature range	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid			Class 9 according to NAS 1638. For this, we recommend using a filter with a minimum retention rate of β10 ≥ 75.

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

	1) Suitable for NBR and FKM seals
	2) Suitable for FKM seals only

For applications outside these parameters, please consult us!

(measured at v = 41 mm2/s and ϑ = 50 °C)

Outlet pressure pA dependent on the flow qV

The characteristic curves apply for outlet pressurepT = zero in the entire flow range.

Flow resistance

Minimum set pressure pmin dependent on the flow qV

The characteristic curves apply for outlet pressure pT = zero in the entire flow range.

Pilot flow qV st dependent on the flow qV

Dimensions in mm

1	Name plate
2	Pilot control valve
3	Main valve
4	Adjustment element "5"
5	Hexagon SW10
6	Adjustment element "4"
7	Adjustment element "6"
8	Adjustment element "7"
9	O-rings 10.82 x 1.78 for ports X and Y
10	O-rings 12 x 2 for ports A, B, P and T
11	Port X must be closed in the subplate
12	Port B must be closed in the subplate
13	Pressure gauge connection
14	Valve contact surface, porting pattern according to DIN 24 340 form A, ISO 4401 and CETOP-RP 121 H Subplates G535/01 (G 3/4) G536/01 (G 1) must be ordered separately. Valve mounting screws 4 x M6 x 45 DIN 912-10.9, MA = 15,5 Nm, must be ordered separately.

BOSCH REXROTHR900973873