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Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.

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China R900445958 ZDR6DA2-4X/150YM Rexroth pressure reducing valve made in Germany
China R900445958 ZDR6DA2-4X/150YM Rexroth pressure reducing valve made in Germany

  1. China R900445958 ZDR6DA2-4X/150YM Rexroth pressure reducing valve made in Germany

R900445958 ZDR6DA2-4X/150YM Rexroth pressure reducing valve made in Germany

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Supply Ability 100
Model ZDR6DA2-4X/150YM
Delivery Time 2 weeks
Packaging Details wooden box
Adjustment Type DA2 = Rotary hand knob with protective cap (hand-adjustable, no tool)
Max. Adjustable Reduced Pressure 150 bar (adjustment range typically 4–150 bar)
Payment Terms Western Union,T/T,D/P,D/A,L/C
Part Number R900445958
Component Series 4X (series 40–49, dimensionally interchangeable)
Certification ISO
Place of Origin Germany
Model Number R900445958 ZDR6DA2-4X/150YM
Brand Name Rexroth

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  1. Product Details
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Product Specification

Supply Ability 100 Model ZDR6DA2-4X/150YM
Delivery Time 2 weeks Packaging Details wooden box
Adjustment Type DA2 = Rotary hand knob with protective cap (hand-adjustable, no tool) Max. Adjustable Reduced Pressure 150 bar (adjustment range typically 4–150 bar)
Payment Terms Western Union,T/T,D/P,D/A,L/C Part Number R900445958
Component Series 4X (series 40–49, dimensionally interchangeable) Certification ISO
Place of Origin Germany Model Number R900445958 ZDR6DA2-4X/150YM
Brand Name Rexroth
High Light Rexroth pressure reducing valveRexroth hydraulic valve made in GermanyZDR6DA2-4X/150YM pressure reducing valve
R900445958 ZDR6DA2-4X/150YM Rexroth Pressure Reducing Valve
Product Specifications
Parameter Value
Part Number R900445958
Model ZDR 6 - DA2 - 4X / 150YM
Valve Type Direct-acting, 3-way pressure reducing valve (sandwich / stackable)
Nominal Size (NG) 6 - sandwich mounting per ISO 5781 / NG6 (DIN 24340 Form E)
Function Reduces pressure in secondary circuit to set value; 3-way action (excess pressure dumped via external drain)
Adjustment Type DA2 = Rotary hand knob with protective cap (hand-adjustable, no tool)
Component Series 4X (series 40-49, dimensionally interchangeable)
Max. Adjustable Reduced Pressure 150 bar (adjustment range typically 4-150 bar)
Max. Operating Pressure (Primary P-port) 315 bar
Max. Operating Pressure (Secondary A/B port) 315 bar
Max. Flow Rate (Qmax) approx. 60 L/min (Size 6 ZDR)
Pilot Oil Drain Y = External pilot drain (separate Y-port to tank)
Seal Material M = FKM (Viton) - specified by "M" suffix in type code / ordering data
Hydraulic Fluid Mineral oil HL, HLP; HEES, HETG (bio-oils); HFC (with NBR - FKM also acceptable for HFC short-term); NOT for HFD(R) without special confirmation
Fluid Temperature Range -20 °C to +90 °C (FKM seals - wider than NBR)
Viscosity Range 10-800 mm²/s
Weight (approx.) 1.7 kg
Body Material Steel / cast iron, zinc-plated
Rexroth ZDR6DA2-4X/150YM Pressure Reducing Valve
Frequently Asked Questions
Q1: Is ZDR a relief valve?
No. A relief valve (DB/DBD) limits upstream/system pressure; a pressure reducing valve (ZDR) maintains a lower, constant pressure in a downstream (secondary) circuit. If primary (inlet) pressure drops below the set reduced pressure, the ZDR opens fully and passes flow unregulated.
Q2: What does "DA2 /150YM" mean?
  • DA2 = NG6 sandwich, rotary hand knob with cap (hand-adjustable)
  • /150 = spring stage, max. adjustable reduced pressure = 150 bar (low-pressure stage; other stages: /75, /210, /315)
  • Y = external pilot drain - pilot oil returns via separate Y-port to tank
  • M = FKM (Viton) seal material
Q3: How do I adjust the reduced pressure?
With the secondary circuit under flow, lift/remove the cap and turn the rotary knob clockwise to increase, counterclockwise to decrease. Verify with a pressure gauge at the secondary port - the knob has no calibrated scale. Factory preset is typically near minimum.
Q4: How is the valve mounted?
As a sandwich (stackable) valve between a directional control valve and the NG6 subplate. Uses NG6 DIN 24340 Form E / ISO 5781 bolt pattern. Sandwich port IDs: P = primary (high pressure from pump), A (or B) = reduced secondary pressure to actuator, T = tank return, Y = external pilot drain to tank (must be connected!).
Q5: Why use the "Y" (external drain) version?
If the T-line in the valve stack has >2-3 bar backpressure, an internally drained ZDR's set pressure will increase by the amount of T-backpressure. The Y-version isolates the pilot from T, keeping the set reduced pressure stable. Always plumb Y separately to tank if T-backpressure exists.

Company Details

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  • Business Type:

    Manufacturer,Exporter

  • Total Annual:

    1 million-10 millon

  • Employee Number:

    >50

  • Ecer Certification:

    Verified Supplier

Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...

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  • Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.
  • Nan'an, Fujian Province, China
  • https://www.electrichydpump.com/

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