Triple Offset Metal Seated Butterfly Valve for Oil / Gas / Water 0.5 Mpa Air Pressure
150lb~600lb Pneumatic piston triple offset metal seated butterfly valve
Material:WCB,WCC,WC6 etc.
Pressure:150lb~300lb
Application:Steam,Oil,Water etc,
Connnection:Flange
Temp.:-20~+450
ZSHWE Series of Three Eccentric Butterfly Valve, both valve disc and three sealing ring are designed in special three eccentric structure,with characteristics of impact structure, good shut-off performance and long operation life etc, so it has both regulating and shut-off functions; Due to the adoption of the three eccentric structure design, when it is opening and closing, the valve plate and the sealing ring can be quickly disengaged (without friction design), which effectively prevent the seal ring from wearing; The valve seat and the sealing ring adopt the replaceable structure design, allowed client to repair and replace conveniently; Its low torque advantage, can really realize the bidirectional zero leakage, small flow resistance and large rated flow coefficient which could be widely used to cut off and regulate the processing fluids, such as metallurgy, oil,chemical engineering,electric power,natural gas.
Characteristics
- One-piece casted body with the feature of compact structure and lightweight
- The triple offset valve advanced design features three-way eccentricity and unique elliptical seat geometry ensuring compressive sealing around the entire seat and a tight, bubble free valve.
- Sealing ring design is novel, concise, free repair
- Stainless steel and graphite laminated seal ring provides reliable, zero leakage, bi-directional shutoff
- Triple offset structure ensure non-rubbing rotation, minimizing torque required and maximizing seat/seal ring lifetime
Seat:304,316+STL
Laminated seal ring:304+Graphite,304+PTFE
Metal to metal seat ring:304+Graphite,304+PTFE
Cover:ZG2Cr13
Body:WCB,CF8,CF8M
Retaining plate:WCB,CF8,CF8M
Retaining ring:WCB,CF8,CF8M
Disc:WCB,CF8,CF8M
Stem:2Cr3,17-4PH
Bearing:QAL9-4
Table 1
Main Performance Parameter
Table 2
|
Item |
Description |
Pneumatic triple offset butterfly valve |
Electric triple offset butterfly valve |
|
|
1 |
Basic error(%) |
±2.5 |
±2.5 |
|
|
2 |
Hysteresis(%) |
2.5 |
2.0 |
|
|
3 |
Dead zone(%) |
2.0 |
3.0 |
|
|
4 |
Travel difference between start and end(%) |
Start |
±2.0 |
±1.5 |
|
End |
||||
|
5 |
Rated angle deviation(%) |
+2.5 |
+0.5 |
|
|
6 |
Rated flow coefficient deviation(%) |
+10 |
||
Specification and Technical Data
Table 3 Rated flow coefficient
|
DN(mm) |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
350 |
400 |
|
|
Rated Kv |
200 |
405 |
620 |
1150 |
2030 |
3150 |
4550 |
|||
