Overview of ductile iron eccentric hemispherical valve:
Ductile iron eccentric hemispherical valve is a new type of ball valve that combines the advantages of traditional hemispherical valves with current pipeline requirements. The valve has no friction when opening and closing, and the sealing components are not easily worn. The diameter of the ball valve can be customized according to specific needs. This valve has numerous structural advantages and has been widely used in a short period of time. The ductile iron eccentric hemispherical valves produced by Fujian Huaguang Valve Factory include manual eccentric ball valves and worm gear eccentric ball valves.
Scope of application of ductile iron eccentric hemispherical valve:
Ductile iron double eccentric hemispherical valves are suitable for urban sewage treatment plants, residential water supply, petrochemical industry, heating pipelines, paper manufacturing and other industries. This valve is also suitable for enterprises that require the transportation of particulate matter.
Characteristics of eccentric hemispherical valve made of ductile iron:
1.The overall structure of the ball valve is scientifically reasonable, compact and exquisite, and the material of ductile iron is lighter than that of traditional ball valves.
2.This valve is more sturdy and durable, with high resistance to corrosion and wear. Suitable for harsh working environments with a wide range of applications.
3.The resistance of the fluid passing through the valve is low, and the flow rate is high.
4.Friction free opening and closing prolongs the service life of the sealing surface and reduces the cost of valve investment.
5.This valve is easy to operate, and maintenance and repair are very convenient. The sealing ring can be replaced after prolonged use, without the need to scrap the valve as a whole.
6.High sealing performance, ensuring zero leakage.
Working principle of eccentric hemispherical valve made of ductile iron:
The eccentric hemispherical valve made of ductile iron relies on the rotation of the valve stem to control the valve disc inside the valve body. The hemispherical valve disc can effectively protect the valve core from erosion and scouring.
Ductile iron eccentric hemispherical valveStructure diagram:
Main component materials of ductile iron eccentric hemispherical valve:
model |
valve body |
ball |
bracket |
valve stem |
filler |
PQ40F-10/16Q |
QT450、WCB |
QT450、WCB、304、316 |
QT450、WCB |
WCB、2Cr13 |
PTFE、 Flexible graphite |
Main external dimensions of ductile iron eccentric hemispherical valve:
Nominal DiameterDN(mm) |
Size(mm) |
|
L |
H |
|
50 |
178 |
210 |
65 |
190 |
215 |
80 |
203 |
245 |
100 |
229 |
265 |
125 |
254 |
290 |
150 |
267 |
315 |
200 |
292 |
360 |
250 |
330 |
380 |
300 |
356 |
450 |
350 |
381 |
500 |
400 |
406 |
570 |
450 |
432 |
640 |
500 |
457 |
700 |
600 |
508 |
760 |
700 |
610 |
830 |
800 |
660 |
920 |
900 |
711 |
1050 |
1000 |
811 |
1185 |
1200 |
1015 |
1325 |
Precautions for installation of eccentric hemispherical valve made of ductile iron:
1.Before installing the ball valve, please clean the pipeline and valve to ensure cleanliness inside the body and avoid debris affecting future use.
2.Please refer to the user manual for detailed instructions on the specific use of ball valves and strictly follow the standards for use.
3.Experienced valve debugging personnel must be hired during debugging to ensure accuracy before operation.
4.If the ball valve is not in use temporarily, please place it in a ventilated and dry room with the valve slightly open to avoid long-term stress on the sealing ring.
5.Every component of the valve is inspected before leaving the factory, and each nut should not be loosened or displaced at will. After the valve has been used for many years, if there is a leakage situation (usually not), the nut of the limit position can be rotated counterclockwise one circle to make the valve tighter, so that the valve can continue to be used.