| 摘要 |
The safety valve (1) situated on the inlet side of the receiver (15) comprises a housing (5) containing a piston or slide valve (7) operated by the fluid pressure. The housing has at least one first aperture (18) connected to the distributor, and a second aperture (13) linked to the receiver (15). The slide valve (7) can occupy two main positions - a first or safety position, in which it is held against a seat (10) by a spring (9) and prevents the flow of hydraulic fluid between the first and second apertures and a second or operating position, in which allows such a flow.
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