Relief pressure valve of adjustable delivery pressure

The utility model provides a relief pressure valve of adjustable delivery pressure, including valve body (1), case (2), seasoning cavity (3), depression bar cover (4), calibrated scale (5) and knob (6). The utility model discloses a valve body be equipped with import, export, throttle chamber and go up the accent, the case comprises diaphragm, core frame, dnockout core, filter screen and gasket, seasoning cavity comprises screw rod, pressure -regulating nut and spring, the during operation, the water under high pressure of import department is flowed through to throttle to stitch and is reduced pressure to low pressure water from exit outflow, when exit water pressure increased, the diaphragm drove the dnockout core and shifts up, and the bulb will be reduced expenditure to stitch and reduced and even close, make the low water pressure in exit remain stable, when adjusting the decompression proportion, rotatory knob, screw rod drive pressure -regulating nut and promote the spring downwards, and the spring inc