QF-4 pressure safety relief valve Brass oxygen cylinder valves GB8335 PZ27.8

QF-4 pressure safety relief valve Brass oxygen cylinder valves GB8335 PZ27.8

Description:

Performance requirements:

1. opening and closing torque, under the nominal pressure, the valve opening and closing the required maximum torque should not exceed 6Nm
2.  air tightness, under the nominal pressure of 1.1 times, the valve is closed and any open state should be no leakage.
3. vibration resistance, under the nominal pressure, the valve should be able to withstand theamplitude of 2mm, frequency of 33 Hz 1/3 vibration, the valve on the threaded connection should not loose, there is no leakage.

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