HD-Z1S SERIES

The HD-Z1S series by Huade is a direct-acting check valve in sandwich plate design, intended to be stacked vertically between the directional valve and the subplate in modular assemblies. This valve type blocks flow in one direction without leakage and allows free flow in the opposite direction.

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Details

Available sizes: 6 (CETOP 3, series 3X) – 10 (CETOP 5, series 3X)
Maximum operating pressure: 315 bar
Maximum flow rate: 100 l/min
Compatible fluids: mineral oil (NBR seals); phosphate ester (FPM seals)
Mechanical actuation
Compact design

12-MONTH WARRANTY

Benefits

Reduced footprint (no additional fittings or pipework required)
Leak-free sealing even at high pressures thanks to metal-to-metal closure
Possibility of installing two independent check valves in the same plate

Applciations fields

Application fields

Hydraulic systems with modular subplate assemblies
Circuits requiring leak-free locking of working lines
Machine tools
Hydraulic presses

Technical data sheet

Technical data sheet HD-Z1S SERIES Huade

Code

Size

Q max (l/min)

P max (bar)

Z1S6 (30B)

315

Z1S10 (30B)

100

315

Code Z1S6 (30B)

Size 6

Q max (l/min) 40

P max (bar) 315

Code Z1S10 (30B)

Size 10

Q max (l/min) 100

P max (bar) 315

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Rexroth cross-reference

Huade HD-Z1S: the alternative to Rexroth Z1S sandwich check valves

The Huade HD-Z1S is a check valve in sandwich plate format that allows free flow in one direction and blocks it in the other. It is the alternative to Rexroth Z1S6 and Z1S10: same ISO 4401 sandwich format, series 3X.

Series cross-reference

Rexroth series	Huade series	Size / interface	Max flow	Max pressure
Z1S6 (3X)	HD-Z1S6 (30B)	NG6 – Cetop 3 sandwich	40 l/min	315 bar
Z1S10 (3X)	HD-Z1S10 (30B)	NG10 – Cetop 5 sandwich	100 l/min	315 bar

Why choose it instead of the original

Compact and simple: no extra fittings or piping in the valve stack.
24-month warranty and every unit tested on our test bench in Gallarate (Italy) before shipment.
Delivery: 24–48 hours for stock items, 2 weeks standard.
Technical support: our engineers convert your current code and check the installation with you.

What we check before confirming the replacement

Size and series (3X)
Line with the check function (P, A, B or T)
Cracking pressure
Seals: NBR or FPM

Send us your Rexroth code

We return the equivalent code, checked by our technical team, with price and delivery time.

Get the equivalent code

Frequently asked questions

Which valve replaces a Rexroth Z1S6?

The Huade HD-Z1S6 (series 30B): Cetop 3 sandwich, up to 40 l/min and 315 bar.

And a Rexroth Z1S10?

The Huade HD-Z1S10 (series 30B): Cetop 5 sandwich, up to 100 l/min and 315 bar.

How do I get the equivalent code?

Send us the full Rexroth Z1S code from the nameplate: our technical team returns the equivalent HD-Z1S code, checked for size, version and seals.

Rexroth, Voith and the series names mentioned are trademarks of their respective owners and are used only to indicate compatibility. Hydraut Europe S.r.l. is not affiliated with these companies. Interchangeability is confirmed code by code by our technical team.