ZECO 8 inch butterfly valve adopts rubber or Teflon material as sealing face, this structure is able to reduce. Butterfly valve is able to be used on various pipes, which shares many advantages: such as its structure is compact, closure is fast, sealing capacity is tightness, operation is easy, life-extension is long. At the process of closure, abrasion is small. Because the valve is designed as double offset structural, when valve is fully open, disc sealing is in the state of loosen. When valve is fully close, seal ring is compressed by body and disc, thus caused the deformation, this kind of flexible sealing maximize sealing capacity. Sealing face precisely cooperate with body, sufficiently avoid medium flushing, prolong valve’s life extension.Valve has the complex structure for a pressure vessel and operational machine, maintaining the valve, occasional open/close shall be put into consideration; At the same time, mainly static pressure state of valve shall also be considered. Keeping the valve to a certain position, operational capacity of valve may be reduced, this is caused by accumulation of corrosive substances on moving parts. Under some circumstances, valve shall be circulated open/close periodically. Intactness of pressure boundary required the intactness of pressure-bearing parts, pressure-bearing shall be checked regularly.
1. ZECO 8 inch butterfly valve can choose metal to metal seat ring or resilient seat ring;
2. The yoke of ZECO 8 inch butterfly valve is designed in according to ISO 5211 standard and connected with electric actuator, pneumatic actuator, hydraulic actuator and manually operated;
3. ZECO 8 inch butterfly valve has replaceable sealing ring design;
4. If ZECO 8 inch butterfly valve chooses metal to metal structure, it can have fire safety design and structure, metal seated structure makes valve fire-safe and meet the requirement in API 607.
ASTM A216 WCB + 13Cr
Graphite + SS316
ASTM A182 F316
ASTM A276 316
ASTM A351 CF8M
ASTM A276 316
SS316 + PTFE
ASTM A193 B7
ASTM A194 2H
ASTM A216 WCB