The butterfly   valve is a simple adjustment valve. Its opening and closing part is a   disk-shaped butterfly plate that rotates around its own axis in the valve   body to achieve the purpose of opening and closing or adjusting. The   butterfly valve is suitable for conveying various corrosive and non-corrosive   fluid media on pipelines in the production furnace, gas, natural gas,   liquefied petroleum gas, urban gas, hot and cold air gas, chemical smelting   and power generation environmental protection, building water supply and   drainage and other engineering systems. It is used to regulate and cut off   the flow of media.

Standards

Design and   Manufacture

API 609,ASME   B16.34,GB/T12238,GB/T12224,JB/T 8527

Face To Face   Dimension

API 609,ASME   B16.10,GB/T12221

Connection   Dimension

ASME B16.5,ASME   B16.47,ASME B16.25,GB/T 9113, HG/T 20592

Test and   Inspection

API 598,GB/T13927,JB/T9092 ,GB/T 26480

Butterfly Valve Structural Features

Butterfly Valve   has advantages like simple structure, small size, light weight, material   consumption, convenient installation size, fast switch, 90 ° reciprocating   rotation, and small driving moment.

The butterfly   valve can transport mud and accumulate the least liquid at the pipe entrance.   Good sealing can be achieved under low pressure. The adjustment performance   is good.

The streamlined   design of the butterfly plate makes the fluid resistance loss small, which   can be described as a energy-saving product.

The stem is a   connecting rod structure. After quality adjustment, it has good comprehensive   mechanical properties and anti-corrosion properties, and is resistant to   abrasion. When the butterfly valve is opened and closed, the stem is only   rotated and not lifted. The filling of the stem is not easy to destroy and is   sealed reliably. Fixed with the butterfly plate cone pin, the outstretched   end is designed to prevent the stem from breaking out when the valve stem and   butterfly plate connect accidentally.

Connection mode   has flange connection, wafer connection, weld connection and lug wafer   connection. The driving forms are manual, worm wheel drive, electric,   pneumatic, hydraulic, electro-hydraulic linkage and other execution   mechanisms, which can achieve long-distance control and automation   operations.

Main Material

A216-WCB/WCC,   A216-LCB/LCC, A351-CF8/CF8M/CF3/CF3M/CF8C, A105, F304/316, etc.

Pressure Range

CL150～CL600; PN6～PN150

Size Range

3”~120”;   DN80~DN3000

Temperature Range

-100℃～+540℃