What is cast iron butterfly valve?

Cast iron butterfly valve is one kind of butterfly valve, whose main parts material is made of cast iron, like valve body, stem or disc; 

Cast iron butterfly valve, also know as cast iron flap valve, is one kind of regulating valve with simple structure, and can also be used for on-off control of medium in low pressure pipelines. 

what is butterfly valve?

Butterfly valve refers to a valve whose closing part(valve disc or butterfly plate) is a disc, which rotates around the valve shaft to achieve opening and closing. Butterfly valve is mainly used for cutting off and throttling on the pipelines. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. From fully open to fully closed, the rotating angle of the butterfly valve is usually less than 90°.

The butterfly valve and the valve stem have no self-locking ability. In order to locate the butterfly plate, a worm gear reducer should be installed on the valve stem. The use of worm gear reducer can not only make the butterfly plate have self-locking ability, so that the butterfly plate can stop at any position, but also improve the operation performance of the butterfly valve; 

The characteristics of the industrial butterfly valve are high temperature resistance, high applicable pressure range, butterfly valve can be made into large diameter valves. For the industrial butterfly valves, the body is made of carbon steel, the sealing ring of the valve disc is made of metal ring instead of rubber ring. For large diameter high temperature butterfly valve, it is welded with steel plates, which is mainly used for flue air duct and gas pipeline of high temperature mediums; 

Types of cast iron butterfly valve:

According to different body material, butterfly valve can be divided into cast iron butterfly valve( like ductile cast iron butterfly valve), cast steel butterfly valve( like WCB butterfly valve), stainless steel butterfly valve( like CF8 butterfly valve).

According to end connections, cast iron butterfly valve can be divided into wafer type cast iron butterfly valve, wafer lug type cast iron butterfly valve and flange type cast iron butterfly valve. The wafer type butterfly valve is connected between the two pipeline flanges with studs. The flange type cast iron butterfly valve has flanges on the valve body, and those flanges at both ends of the butterfly valve are connected to the pipeline flanges with bolts; 

According to different operating methods, there are manual cast iron butterfly valve, electrical cast iron butterfly valve, pneumatic cast iron butterfly valve.

The cast iron butterfly valve is usually using soft sealing materials, like rubber, NBR, PTFE. So there are rubber lined cast iron butterfly valve, NBR lined cast iron butterfly valve, PTFE lined cast iron butterfly valve. 

Applications of cast iron butterfly valve: 

The concentric cast iron butterfly valve is widely used in water conservancy, chemical industry, pharmacy, electric power and other industries, and is used for opening and closing on the pipelines of steam, water, and oil mediums; the structure principle of the center line butterfly valve is especially suitable for making large-diameter valves; 

Belo Valve is a professional water conservancy valves manufacturer, the nominal diameter of the concentric wafer butterfly valve(including the wafer lugged type butterfly valve) can be DN1200, and the nominal diameter of the concentric flange butterfly valve can be DN2000. 

Belo Valve is a more than 15 years professional manufacturer for industrial valves, like butterfly valves( center line wafer butterfly valve, manual butterfly valve, lever driving butterfly valve, butterfly valve with worm gear box, lug type butterfly valve, soft seal butterfly valves, hard seal butterfly valves, flange butterfly valves, ductile cast iron butterfly valves, stainless steel butterfly valve), gate valves(including DINF4 gate valves, DINF5 gate valves, DIN3352 gate valves, rising stem gate valves, non rising stem gate valves, soft seal gate valves, hard seal gate valves, hydraulic gate valves, sluice valves), globe valves( DIN globe valves, bellows globe valves, electric globe valve), ball valves( welded ball valves, soft seal ball valves, stainless steel ball valves, WCB ball valves, ductile cast iron ball valves, API ball valves, forged ball valve, two piece forged ball valves, three piece forged ball valves), check valves( wafer type check valves, swing check valves, rubber disc check valves, ball type check valve, foot valve/bottom valve), fire protection valves( grooved butterfly valves, grooved gate valves, grooved strainers, grooved check valves), hydraulic control valves,etc.

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