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E-mail:official@zzvalves.com
Address：No. 1, Jinniu Road, Xingyang City, Henan Province, China
Hard-sealed expansion butterfly valve
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Expansion Butterfly Valve
Email: official@zzvalves.com
It can be customized according to different needs.
Product Overview
The expansion flange butterfly valve and pipeline expander are combined into one, which can act as a throttle and solve the temperature difference caused by eliminating internal forces, thus serving the functions of expansion and contraction. The valve features a novel design, unique structure, small size, and light weight. The valve is designed innovatively with a unique structure, small size, and light weight. It is easy to operate, labor-saving, opens and closes quickly, with adjustable and replaceable sealing parts, reliable sealing performance, straight-through flow channel design, low flow resistance, and energy-saving. Suitable for temperatures ≤80°C. Widely used in municipal water supply and drainage, industrial pipelines, power systems, chemical systems, etc., it compensates for pipeline thermal expansion and contraction and can be customized according to different requirements.
Main Component Materials
| Component Name | Material |
| Valve Body | Ductile Iron GGG45, Carbon Steel |
| Disc | Ductile Iron GGG45, Carbon Steel, Stainless Steel |
| Valve Stem | Stainless Steel |
| Sealing Parts | Nitrile Rubber |
| Packing | Flexible Graphite |
Technical Parameters
Material: Ductile Iron, Carbon Steel
Size Range: DN50mm~DN1400mm, larger sizes can be customized according to user requirements.
Pressure Rating: 1.0MPa~1.6MPa
Temperature Range: -10°C~80°C
Applicable Media: Clean Water, Sewage
Standards Compliance
Design and Manufacture:
GB/T 12238-2008
EN 593-1:2002
API 609
Flange Connection:
GB/T 9124
EN 1092-1:2001
ANSI B16.5
Face-to-Face Dimensions:
GB/T 12221-2005
EN 593-1:2002
Pressure Test:
GB/T 13927-2022
EN 12266-1:2004
API 598
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