PRESSURE CONTROL VALVES — PRESSURE RELIEF VALVES

HD-ZDB/Z2DB SERIES

The HD-ZDB series by Huade is a pilot-operated pressure relief valve in sandwich plate format, which protects the circuit by discharging oil to tank when pressure exceeds the set value. Available with one (ZDB) or two (Z2DB) pressure cartridges in the same plate.

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Details

Available sizes: 6 (CETOP 3, series 4X) – 10 (CETOP 5, series 4X)
Versions: ZDB (1 pressure cartridge) · Z2DB (2 pressure cartridges in the same plate)
Maximum operating pressure: 315 bar
Maximum flow rate: 100 l/min
Internal pilot actuation
Compatible fluids: mineral oil HL/HLP/HVLP (NBR seals); phosphate ester, biodegradable fluids HETG/HEES/HEPG, fire-resistant fluids HFDU/HFDR/HFC (FPM seals)

12-MONTH WARRANTY

Benefits

Circuit protection against pressure spikes (the valve intervenes automatically when pressure exceeds the set value)
Stable and precise pressure even with varying flow rates
No need for different valve bodies thanks to versions DA, DB, DP, DC and DD covering any protection layout
The Z2DB version with dual cartridge in the same plate allows two channels to be protected simultaneously with a single component, saving space in the stack
Reduced footprint (no additional fittings or pipework required)

Applciations fields

Application fields

Machine tools
Hydraulic presses
Fixed industrial systems with overpressure protection requirements
Environments requiring biodegradable or fire-resistant fluids

Technical data sheet

Technical datasheet HD-ZDB/Z2DB SERIES HUADE

Code

Size

Q max (l/min)

P max (bar)

Z(2)DB6

315

Z(2)DB10

100

315

Code Z(2)DB6

Size 6

Q max (l/min) 60

P max (bar) 315

Code Z(2)DB10

Size 10

Q max (l/min) 100

P max (bar) 315

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Rexroth cross-reference

Huade HD-ZDB and Z2DB: the alternative to Rexroth ZDB and Z2DB pressure relief valves

The Huade HD-ZDB and HD-Z2DB are pilot-operated pressure relief valves in sandwich plate format, with one (ZDB) or two (Z2DB) pressure cartridges. They are the alternative to Rexroth ZDB6, ZDB10, Z2DB6 and Z2DB10: same ISO 4401 sandwich format, stacked under the directional valve.

Series cross-reference

Rexroth series	Huade series	Size / interface	Max flow	Max pressure
ZDB6 / Z2DB6	HD-Z(2)DB6 (4X)	NG6 – Cetop 3 sandwich	60 l/min	315 bar
ZDB10 / Z2DB10	HD-Z(2)DB10 (4X)	NG10 – Cetop 5 sandwich	100 l/min	315 bar

Why choose it instead of the original

Wide fluid compatibility: mineral oils, phosphate esters, biodegradable and fire-resistant fluids with FPM seals.
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 (4X)
One or two cartridges and the line they act on (A, B, P)
Pressure setting range
Seals and fluid

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 ZDB6 or Z2DB6?

The Huade HD-ZDB6 or HD-Z2DB6 (series 4X): Cetop 3 sandwich, up to 60 l/min and 315 bar.

And a Rexroth ZDB10 or Z2DB10?

The Huade HD-ZDB10 or HD-Z2DB10 (series 4X): Cetop 5 sandwich, up to 100 l/min and 315 bar.

How do I get the equivalent code?

Send us the full Rexroth ZDB / Z2DB code from the nameplate: our technical team returns the equivalent HD-ZDB / Z2DB 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.