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Check valve ZZ25
Check valve ZZ25
ZZ60000.00.000
FDH400/31.5 (according GB/T 25974.3-2010) China market
The ZZ25 inline check valves are designed for installation in hydraulic systems to ensure free flow of the working medium in one direction (PA) and closing the flow in the return direction. They are mainly used in hydraulic systems of powered roof supports, in order to protect the control system against adverse influence of the return pipeline pressure increase.
| Technical parameters | ||
|---|---|---|
| Nominal valve diameter | mm | 20 |
| Sealing type of the piston | – | metal-metal |
| Max. working pressure PN | MPa | 32 |
| Min. opening pressure | MPa | 0,06 |
| Max flow ratio on the path P-A | l/min/MPa | ~1900/32 |
| Max flow ratio on the path P-A at 5 MPa | l/min. | ~750 |
| Recommended filtration | µm | 40 |
| Receiver connections P and A | – | DN25 |
| Total weight of the valve | kg | 1,25 |
The valve can operate with using HFA fire-resistant fluids (oil-in-water emulsions) with a concentrate content of 0.5–3%, based on mineral and synthetic oils compliant with the PN-C-96047 standard. If other operating fluids (mediums) have to be used, it is required to contact the valve manufacturer.
