Manufacturer Of Air Butterfly Valve - Extention Stem Wafer Butterfly Valve – Zhongfa

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Body Test: The valve body test use 1.5 times pressure than standard pressure. The test should be done after installation, the valve disc is half close, called body pressure test. The valve seat use 1.1 times pressure than standard pressure.

ZFA Valve strictly execute API598 standard, we do both side pressure testing for all the valve 100%, guarantee deliver 100% quality valves to our customers.

All valve body casted by precise casting body, DI, WCB, Stainless Steel and many other materials, with perfect appearance, each batch has its casting stove number, easy to trace for material protection.

We use CNC machining to process the valve disc, control the precision of the valve by ourselves, guarantee good sealing property from low to high temperature.

Our valve stem is stainless steel material, the strength of the valve stem is better after tempering, reduce the transformation possibility of valve stem.

ZFA Valve body use solid valve body, so the weight is higher than regular type.

Bolts and nuts use ss304 material, with higher rust protection capability.

The valve body use high adhesive force epoxy resin powder, helps it adhere to the body after melting.

The valve seat is wide edge seat, sealing gap is wider than regular type, makes the sealing for connection easier. Wider seat also easy to install than narrow seat. The stem direction of the seat has lug boss, with O ring on it, archive the second sealing of the valve.

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