R900410875 ZDR10DP2-5X/75YM Rexroth Germany made pressure reducing valve

Name: R900410875 ZDR10DP2-5X/75YM Rexroth Germany made pressure reducing valve
Brand: Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.

Price Negotiable

Price: Negotiable

MOQ: 1

Delivery Time: 2 weeks

Brand: Rexroth

Product Description

R900410875 ZDR10DP2-5X/75YM Rexroth Germany Made Pressure Reducing Valve

Direct-acting, 3-way pressure reducing valve designed for sandwich mounting between directional control valves and NG10 subplates. Manufactured by Rexroth in Germany.

Parameter	Value
Part Number	R900410875
Model	ZDR 10 - DP2 - 5X / 75YM
Valve Type	Direct-acting, 3-way pressure reducing valve (sandwich/stackable)
Nominal Size (NG)	10 - sandwich mounting per ISO 5781 / NG10 (DIN 24340 Form E)
Function	Reduces & maintains pressure in secondary circuit to set value; 3-way action (excess pressure dumped via external drain)
Adjustment Type	DP2 = Rotary hand knob with protective cap (hand-adjustable, no tool - NG10 sandwich version)
Component Series	5X (series 50-59, dimensionally interchangeable)
Max. Adjustable Reduced Pressure	75 bar (adj. range typically 3-75 bar - low-pressure stage)
Max. Operating Pressure (Primary P-port)	315 bar
Max. Operating Pressure (Secondary port)	315 bar
Max. Flow Rate (Qmax)	approx. 120-150 L/min (Size 10 ZDR)
Pilot Oil Drain	Y = External pilot drain (separate Y-port to tank)
Seal Material	M = FKM (Viton) - specified by "M" suffix
Hydraulic Fluid	Mineral oil HL, HLP; HEES, HETG (bio-oils - FKM recommended); HFC (short-term OK, NBR preferred for prolonged HFC)
Fluid Temperature Range	-20 °C to +90 °C (FKM seals)
Viscosity Range	10-800 mm²/s
Weight (approx.)	3.3 kg
Body Material	Cast iron / steel, zinc-plated

Rexroth ZDR10DP2-5X/75YM pressure reducing valve

Related Part Numbers

R901387787 4WRPEH6CB04L-2X/G24K0/C6V
R901387788 4WRPEH6C4B40L-2X/G24K0/C6V
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R901396969 4WRPEH6C3B04L-3X/M/24F1-885
R901402614 4WRPEH6C3B24L-3X/G24K0/A1M=KM
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R901410492 4WRPEH6C3B40L-3X/M/24A1-15
R901412522 4WRPEH6C4B12L-3X/M/24A1-561
R901422942 4WRPEH6CB40L-3X/V/24F1
R901423624 4WRPEH6C1B24L-3X/V/24A1
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R927000625 4WRPEH6C3B04L-2X/G24K0/A1M
R927000626 4WRPEH6C4B40L-2X/G24K0/A1V
R927000627 4WRPEH6C3B24L-2X/G24K0/A1M
R927000628 4WRPEH6C4B04L-2X/G24K0/A1M
R927000629 4WRPEH6C4B12L-2X/G24K0/A1M
R927000630 4WRPEH6C4B24L-2X/G24K0/A1M
R927000631 4WRPEH6C3B40P-2X/G24K0/A1M
R927000632 4WRPEH6C4B02L-2X/G24K0/A1M
R927000633 4WRPEH6C4B40P-2X/G24K0/A1M
R927000635 4WRPEH6C3B04L-2X/G24K0/F1M
R927000636 4WRPEH6C3B12L-2X/G24K0/F1M
R927000637 4WRPEH6C3B24L-2X/G24K0/F1M
R927000639 4WRPEH6C3B40L -2X/G24K0/F1M
R927000641 4WRPEH6C3B04L-2X/G24K0/B5M
R927000642 4WRPEH6C3B24L-2X/G24K0/B5M
R927000643 4WRPEH6C3B12L-2X/G24K0/B5M
R927000644 4WRPEH6C4B24L-2X/G24K0/B5M
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R927000920 4WRPEH6CB04L-2X/G24K0/A1M
R927000921 4WRPEH6CB40L-2X/G24K0/F1M
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R978714494 4WRPEH6CB40L-2X/G24K0/A1M SO43A-1851
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0811404001 4WRP10E63S-1X/G24Z4/M
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0811404003 4WRP10E32S-1X/G24Z4/M
0811404004 4WRP10W32S-1X/G24Z4/M-787
0811404011 REGELVENTIL
0811404016 WEGEVENTIL
0811404019 4WRP10EA63S-1X/G24K4/M-851
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0811404021 4WRP10EA63S-1X/G24Z4/M-850
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0811404035 4WRPH6C3B24L-2X/G24Z4/M
0811404036 4WRPH6C3B40L-2X/G24Z4/M
0811404037 4WRPH6C4B12L-2X/G24Z4/M
0811404038 4WRPH6C4B24L-2X/G24Z4/M
0811404039 4WRPH6C4B40L-2X/G24Z4/M
0811404040 4WRPH6KB50P-2X/G24Z4/M
0811404041 4WRPH6C3B02L-2X/G24Z4/M
0811404042 4WRPH6C3B04P-2X/G24Z4/M

Frequently Asked Questions

Is ZDR a relief valve / overflow 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 inlet (primary) pressure drops below the set reduced pressure, the ZDR opens fully and passes flow unregulated - it does not protect the pump from overpressure.

What does "DP2 /75YM" mean?

DP2 = NG10 sandwich, rotary hand knob with protective cap (hand-adjustable)
/75 = spring stage, max. adjustable reduced pressure = 75 bar (low-pressure stage; also available: /150, /210, /315)
Y = external pilot drain - pilot oil returns via separate Y-port to tank, not via the sandwich T-channel
M = FKM (Viton) seal material

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; fine-tune under operating flow if possible.

How is the valve mounted?

As a sandwich (stackable) valve between a directional control valve and the NG10 subplate. Uses NG10 DIN 24340 Form E / ISO 5781 bolt pattern (four M10 bolts). Sandwich port IDs: P = primary (high pressure from pump side), A (or B) = reduced secondary pressure to actuator, T = tank return, Y = external pilot drain to tank (must be plumbed separately!).

Why specify the "Y" (external drain) version?

If the T-line in the valve stack has >2-3 bar backpressure, an internally drained ZDR's set reduced pressure will increase by the amount of T-backpressure. The Y-version drains the pilot independently to tank, keeping the set reduced pressure stable. Always use Y-version if T-backpressure is present or uncertain.

What is the "M" seal version for?

M = FKM (Viton) seals - for:

Higher fluid temperature (up to ~90 °C)
Biodegradable oils (HEES, HETG - NBR not recommended)
Some HFC applications (short-term; NBR preferred for prolonged HFC exposure)

Not for phosphate ester (HFD) unless specially confirmed.

Common faults & causes?

Reduced pressure too high / cannot lower: wrong spring stage (e.g. /210 or /315 installed), pilot orifice clogged, Y-drain line blocked (Y-version!), inlet pressure insufficient to allow regulation
Reduced pressure drifts / unstable: contaminated pilot seat, damaged O-ring on sandwich face causing internal leak, Y-line restricted or pinched
Excessive heating at T: Normal for 3-way ZDR - some bypass to T occurs to hold set pressure; excessive heat may indicate stuck spool from contamination - flush system & verify filtration (ISO 4406 18/16/13 or better)