Pressure relief valve ZDB 6 can replace the products offered by Rexroth®. The fact is that Huade Hydraulic has had two long-terms cooperation with Rexroth. This cooperation enables Huade® pressure valves to reach the same level as Rexroth products in terms of performance, quality and compatibility. The factory has passed ISO9001, ISO14001 and OH SAS18001.The factory Factory has a large production scale, which can effectively control costs and provide customers with cost-effective and practical hydraulic pressure valves. Due to its reliable and stable performance, Huade® hydraulic products are widely used in the military and marine industries.
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Pressure fluid |
Mineral oil (for NBR seal),or phosphate ester (for FPM seal) |
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Pressure fluid - temperature range (℃) |
-30～+80 |
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Viscosity range (mm/s) |
10～800 |
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Degree of fluid contamination |
Maximum permissible degree of contamination of the |
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Operating pressure,max. (MPa) |
up to 31.5 |
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Pressure adjustable, max. setting (MPa) |
up to 5、 to 10、to 20、to 31.5 |
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Flow, max. (L/min) |
up to 60 |
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Weight |
Type ZDB 6 (Kg) |
approx.1 |
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Type Z2DB 6 (Kg) |
approx. 1.2 |
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Features:
▶ Sandwich plate valve
▶ 4 pressure ranges
▶ 5 circuit options
▶ With one or two pressure relief cartridges
▶ 4 adjustment elements.
·Rotary knob
·Sleeve with hexagon and protective cap
·Lockable rotary knob with scale
·Lockable rotary knob
Application:
Pressure relief valve ZDB 6 is used to limit the pressure within a hydraulic system.
Pressure relief valve types ZDB and Z2DB are pilot operated and are of sandwich plate design.
They basically consist of the housing (7), together with one or two pressure relief valve cartridges.
The system pressure is set by means of adjustment element (4).
At rest, the valve is closed. Pressure in port A acts on the spool (1). At the same time pressure passes through orifice(2) on to the spring loaded side of spool (1) and via orifice (3) to the pilot poppet (6). If the pressure in port A rises above the value set on spring (5), the pilot poppet (6) opens. Fluid can now flow from the spring loaded side of spool(1), orifice (3), and channel (8) into port T. The resulting pressure drop then moves spool (1), causing this to open connection A to T, while the pressure set at spring (5) is maintained.
Pilot oil from the two spring chambers return externally to tank via port T.
Structure and symbols of Pressure Relief Valve ZDB 6
1.The fluid must be filtered. Minimum filter fineness is 20 ㎛.
2.The tank must be sealing up and an air filter must be installed on air entrance.
3.Products without subplate when leaving factory, if need them, please ordering specially.
4.Valve fixing screws must be high intensity level (class 10.9). Please select and use,them according to the parameter listed in the sample book.
5. Roughness of surface linked with the valve is required surface roughness is 0.8.
6. Surface finish of mating piece is required to 0.01/100mm.
Address
No. 27, Yangsha Road, Huilong Town, Nantong City, Jiangsu Province, China
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