The basic design parameters
Nominal size: 50-2000 - mm DN, 1 ~ 78
Structure length: GB, ANSI B16.10. 12221-89
Nominal pressure: PN 1.0 ~ 6.4 MPa Class 150 ~ 300 lb
The connection form
A. the flange: JB/T 79-94. GB9112 ~ 9131 ~ 9131, HGJ 44 ~ 76-76, ANSIB 16.5
B, welding, GB, ANSI B16.25. 12224-89
Use the temperature: - 40 ~ 50 ~ 450 degree centigrade, 300 degree centigrade, -, - 101 ~ 600degree centigrade, - 101 ~ 800degree centigrade
The basic error: 2.5%
Back to the poor: 2% or less Dead zones: 0.8% or less
Applicable medium: water, gas, oil and corrosive medium

The major parts material list:

Part name	The material
The valve body, disc plate	WCB	CF8	CF8M、CF3M
The valve stem	2Cr13	CF8	CF8M
The seat	Metal/metal + flexible graphite
packing	Graphite packing/flexible graphite