Products Details

Large diameter flanged butterfly valve is a kind of valve widely used in industrial production pipelines, mainly used to cut off or regulate the medium flow in the pipeline. The following are some details about the large diameter flange butterfly valve:

Product Specifications:

Size: DN50~4000
Pressure rating: PN10~25
Material: carbon steel, stainless steel
Design standard: GB/T12238
Connection mode: flange connection
Product features:

The hard seal butterfly valve adopts the three-eccentric hard seal structure, the seat and the butterfly plate are almost no wear, and the sealing function is tighter and tighter.
The sealing ring is made of stainless steel, with the double advantages of metal hard seal and elastic seal, excellent sealing performance, corrosion resistance, long service life, suitable for low temperature and high temperature environment.
The sealing surface of the butterfly plate is surfacing cobalt-based cemented carbide, which is wear-resistant and has a long service life.
Large butterfly plate adopts sewn frame structure, high strength, large circulation area and small flow resistance.
According to user requirements, the butterfly valve can be designed as a two-way sealing function, which can be installed in any direction, and is not affected by the flow restriction of the medium or the spatial position.
The drive unit can be installed in multiple positions (rotated 90° or 180°) for easy user use.
Application field:

Suitable for chemical industry, water treatment, petroleum, urban heating and other general industrial production pipelines.
It can also be used in the condenser and cooling water systems of thermal power plants.
It is especially suitable for making large diameter valves and is widely used in the field of large diameter regulation.
Technical specifications:

Design standards: EN593, MSS SP67, API609, BS5155
Flange dimensions: ISO 5752, EN 558, MSS SP67, API 609, DIN3202
End standard: ANSI B16.1 Class125LB & B16.5 Class150LB, AS 2129 Table D & E, BS 10 Table D & E, DIN 2501 PN6, PN10 & PN16, EN 1092 PN6, PN10 & PN16, ISO 2531 PN6, PN10 & PN16, ISO 7005 PN6, PN10 & PN16, KS B 1511 / JIS B 2210 5K & 10K,  MSS SP44 CL. 150LB AWWA C207, SABS 1123 Table 1000/3 & Table 1600/3
Top flange: ISO5211
Test standards: API 598, ISO 5208, EN 12266
List of materials:

Body: cast iron, ductile iron, WCB, SS304, SS316, bronze, aluminum alloy
Seal ring: EPDM, NBR, PTFE, VITON, rubber
Butterfly plate: ductile iron, CF8, CF8M, WCB, bronze, aluminum alloy
Stem: 45#, 410, 420, 431, 304, 304L, 316, 316L, bronze, Monel, hard alloy
Seal type:

Soft sealing flange butterfly valve: The use of rubber, fluorine plastic and other elastic sealing materials, the sealing ring can be embedded in the valve body channel, sealing performance reaches FCI70-2:2006 (ASME B16-104) class VI, suitable for water protection and water treatment at room temperature.
Hard sealed flange butterfly valve: the use of metal to metal, metal to fluorine plastic and multi-layer composite plate, adapt to higher working temperature and pressure, long service life, but the sealing performance is poor, suitable for sealing requirements are not high occasions.