BOSCH REXROTH
R900438029

BOSCH REXROTH
Material:R900438029
Model:DR 10 K4-3X/200YMV

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 DR 10 K4-3X/200YMV (R900438029) is a high-performance screw-in cartridge valve designed for efficient pressure reduction in hydraulic systems. This pilot-operated pressure reducing valve is part of the DR.K product family, which is known for its reliability and precision in controlling system pressure. The valve features an adjustable rotary knob that allows users to set the secondary pressure to the desired level, ensuring optimal performance for various applications. With a maximum operating pressure of 315 bar (4569 psi) and a nominal flow capacity, the DR 10 K4-3X/200YMV valve can handle significant hydraulic demands while maintaining stability and control. It is equipped with FKM sealing material and conforms to cavity Mx standards, ensuring compatibility with a wide range of hydraulic fluids including HL, HLP, HEES, and HEPG. The design includes a poppet-type spool that remains normally open in its initial position, allowing unrestricted fluid flow from port A to B. The secondary pressure is kept constant by the main spool's control position, which adjusts based on the spring-set value. This feature makes it ideal for applications where precise pressure management is critical. Furthermore, this model incorporates internal pilot oil supply and external pilot oil return mechanisms that contribute to its efficient operation. Its robust construction and meticulous design make it an essential component for various hydraulic systems requiring consistent pressure regulation. The DR 10 K4-3X/200YMV valve exemplifies Bosch Rexroth's commitment to engineering excellence and provides users with a dependable solution for their pressure reducing needs.

Unpacked Weight: 0.38 kg

Pressure valves type DR 10 K.. are pilot-operated pressure reducing valves for block design installation. They are used for reducing a system pressure. The secondary pressure is set via the adjustment type (4).

In initial position, the valves are open. Hydraulic fluid can flow from main port 2 to 1 without restrictions. The pressure in main port 1 acts simultaneously at main spool (1) and via the nozzle (2) at the spring-loaded inside of the main spool (1). Similarly, it acts via nozzle (7) on the pilot poppet (8). If the pressure in main port 1 exceeds the value set at spring (5), the pilot poppet (8) opens. Hydraulic fluid flows from the chamber of spring (3) via the nozzle (7), the pilot poppet (8) and the spring chamber (6) into main port 3. The main spool (1) assumes its control position and keeps the value in main port 1 set at the spring (5) constant.

The pilot oil return from the spring chamber (6) is always realized externally via main port (3).

Notice!

Counter pressures (main port 3) add up to the set pressure.

Type DR 10 K5-3X/.YM

technical illustration-R900438029-Cartridge valve 4 pressure ratings 4 optional adjustment types:• Rotary knob• Sleeve with hexagon and protective cap• Lockable rotary knob with scale• Rotary knob with scale

Screw-in cartridge valve
Maximum operating pressure 350 bar (5000 psi)
Maximum flow 100 l/min (26 gpm)
Cavity M24x1

Max. pressure	350
Adjustment options	Rotary knob
Product family classification	Pressure reducing valve, pilot operated
Productgroup ID	9,10,11,12,13,14
Product family type	DR.K
Ports number	3
Sealing material	FKM
Cavity	M24x1
Product type	DR.K
Max. flow	100
Type of connection	Screw-in cartridge valve
Normal position	Normally open
Nominal flow	100
Direct - Pilot	Pilot operated
Product family	Reducing
Pilot oil supply and return	Internal pilot oil supply, external pilot oil return
Spool Poppet	Poppet type
Weight	0.38
Hydraulic fluid	HL,HLP,HEES,HEPG

01	02	03	04		05		06	07	08	09	10
DR	10	K		–	3X	/		Y	M		*

01	Pressure reducing valve, pilot-operated	DR
02	Size 10	10
03	Cartridge valve	K
Adjustment type
04	Rotary knob	4
	Sleeve with hexagon and protective cap	5
	Lockable rotary knob with scale	6 1)
	Rotary knob with scale	7
05	Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions)	3X
Pressure rating
06	Secondary pressure up to 50 bar	50
	Secondary pressure up to 100 bar	100
	Secondary pressure up to 200 bar	200
	Secondary pressure up to 315 bar	315
07	Internal pilot oil supply, external pilot oil return	Y
08	Without check valve	M
Seal material
09	NBR seals	no code
	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. R900008158 is included in the scope of delivery.

general

Size			10
Weight		kg	0.2
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +80
Ambient temperature range	FKM seals	°C	-20 … +80

hydraulic

Size			10
Maximum operating pressure 1)	Main port 2 (P)	bar	315
Secondary pressure	Main port 1 (A)	bar	50 100 200 315
Maximum adm. counter pressure 1)	Main port 3 (T)	bar	315
Maximum flow		l/min	100
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 2)			Class 20/18/15 according to ISO 4406 (c)

1)	Attention! The maximum operating pressure is added up from the set pressure and the return flow pressure.
2)	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 2)
Bio-degradable	Insoluble in water	HEES (synthetic esters) 3)	FKM	VDMA 24568
		HETG (rape seed oil) 2)	FKM, NBR
	Soluble in water	HEPG (polyglycols) 3)	FKM	VDMA 24568
Other hydraulic fluids on request

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

For applications outside these parameters, please consult us!

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

pA-qV characteristic curves

pA-qV characteristic curves (in the range of 50 bar)

qV St-qV characteristic curves at Δp (pE – pA)

Δpmin-qV characteristic curves

➀	Main port 1 (A)
➁	Main port 2 (B)
➂	Main port 3 (Y)

➀	Main port 1 (A)
➁	Main port 2 (B)
➂	Main port 3 (Y)

Dimensions in mm

Mounting cavity, 3 main ports; M24 x 1 thread