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Boost yeild valve FZU-M45-D-2
Boost yeild valve FZU-M45-D-2
P07.7162-5300
FATA2000/50/54 (P07.716-25300)
(according GB/T 25974.3-2010) - China market
The boost yeild valve is intended for application in hydraulic legs of powered roof supports. The function of the valve is to protect the leg against excessive pressure increase in the under piston area, especially in mining conditions exposed to the occurrence of high energy rock mass tremors (bumps). A special feature of the boost yeild valve is a two-stage operation and a very short opening time, which occurs as a result of a pressure difference between the control component and the main piston. The valve elements are made of high-grade stainless steel (including springs) and brass.
| Technical parameters | ||
|---|---|---|
| Nominal diameter of the main piston | mm | 19 |
| Nominal diameter of the control piston | mm | 3,5 |
| Sealing type of the main piston | – | metal-plastic |
| Pressure setting range Pn | MPa | 40-53(54) |
| Max. flow at setting 50/54 MPa (GB/T 25974.3-2010) | l/min. | <2000 |
| Opening time | ms | 2-5 |
| Construction version | – | stainless steel/brass |
| Recommended filtration | µm | 40 |
| Mounting connection | – | M45x2 |
| Total weight | kg | 2,04 |
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 valve manufacturer.
