| nominal diameter | dn50~2600 |
| nominal pressure | pn0.25~1.0mpa |
| medium temperature | -40~595℃ |
| connection method | flange type |
| valve bonnet type | standard type |
| body material | 20＃、304、316 |
| valve plate sealing type | open type, rear seat type, inclined type |
| valve seal materials | 20＃、304、316 |
| flow characteristics | approximate equal percentage |
| leakage – hard seal | ≤0.5%×kv |
zshw series ventilated butterfly valve body and valve plate are all welded with steel plate. it is a kind of butterfly valve with light weight, simple structure and convenient operation. equipped with gears, rack-type double-piston pneumatic actuators or electronic electric actuators, it is applicable to the flow and pressure control of air or other gases with low dropout pressure and low leakage, as well as to gases in high temperature conditions.