The valve consists of 4 main parts or units:
- A body, the bottom of which screws onto the cylinder, with a
standard O ring seal.
- A check that can move within the bore of the body, thus enabling
the valve to open.
- A cap that screws on to the upper part of the body and contains a
tripping orifice for instantaneous valve operation.
- A safety device protects the cylinder against overpressure due to
excessive temperature, this device operates if the temperature
exceeds 70 C at the maximum filling ratio.