Design standard: GB12237-89    HG/T3704-2003
	Structure length: HG/T3704-2003    GB/T12221-2005
	Flange standard:     JB/T79.1    GB/T79113.1    ANSIB16.5
	Nominal pressure:   0.6  1.0  1.6  2.5MPa  150Lb
	Check test: JB/T9092-99, electric spark test; GB/T13927,
	vapour pressure test AP1598
	Driving mode: Manual operation, worm wheel,
	air-operating and electronic operating
	Lining martial:  FEP (F46), PFA(FA), E-TFE(F40) and PTFE (F4)
	Valve material: Cast steel and stainless steel