Pn10 Pn16 Cast Iron Flange Gate Valve
PN10 PN16 Cast Iron Flange Gate Valve
The flange gate valve is used as a cut-off medium. When fully open, the entire flow is straight through. At this time, the pressure loss of the medium is minimal. Flange gate valves are usually suitable for conditions that do not require frequent opening and closing and keep the gate fully open or fully closed. Not suitable for use as a regulator or throttling device. For high-speed flowing media, partial opening of the gate can cause vibration of the gate, and the vibration may damage the sealing surface of the gate and valve seat, and throttling will cause the gate to be eroded by the medium. In terms of structural form, the main difference is the form of sealing element used. According to the form of sealing elements, gate valves are often divided into several different types, such as: wedge gate valve, parallel gate valve, parallel double gate valve, wedge double gate, etc. The most commonly used forms are wedge gate valves and parallel gate valves.
| Design and manufacturing | Structure length | Pressure-Temperature Rating | connecting flange | |
| GB12234 | GB1221 | GB9131, JB/T74, HGJ67 |
JB/T74~90, GB9112~9131, HGJ44~76 |
| host want zero pieces material material |
Valve body, valve cover, gate | WCB | ZG1Cr18Ni9Ti | CF8 (304) |
CF3 (304L) |
ZG1Cr18Ni12Mo2Ti | CF8M (316) |
|
| Sealing surface | Cr13 or Hard alloy |
Body (W) or carbide (Y) | ||||||
| Valve stem and internal parts | 2Cr13 | 1Cr18Ni9Ti | 0Cr19Ni9 (304) |
00Cr19Ni11 (304L) |
1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2 (316) |
||
| filler | flexible graphite | |||||||
| Gasket | Stainless steel spiral wound gasket | |||||||
| Applicable working conditions | Applicable media |
water air |
Corrosive media such as nitric acid | Strong oxidizing medium | Corrosive media such as acetic acid | |||
| proper temperature | -29~425℃ | -40~500℃ | ||||||




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