Hydrogen cylinder valves	QF-30A	15	Φ4	H2	W21.8-14-LH-EXT	PZ27.8	NO	Movable flap type
	QF-30C1	15	Φ4	H2	W21.8-14-LH-EXT	PZ27.8	NO	Coupling type
	QF-30C2	15	Φ4	H2	W21.8-14-LH-EXT	PZ27.8	21±1.5MPa	Axial connection type
	QF-30D	15	Φ4	H2	G5/8-14-LH-INT	BS3411''	NO	Axial connection type
	QF-30D	15	Φ4	H2	G5/8-14-LH-INT	PZ27.8	NO	Axial connection type