Dual-ear spherical - Thick waterline EPDM seat - 304 flat plate - Steel valve head
Dual-ear spherical - Thick waterline EPDM seat - 304 flat plate - Steel valve head
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Dual-ear spherical - Thick waterline EPDM seat - 304 flat plate - Steel valve head
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Dual-ear spherical - Thick waterline EPDM seat - 304 flat plate - Steel valve head
Component Composition:
Valve body: Featuring a flanged connection design, it is secured between pipe flanges using bolts, providing an internal passage for fluid flow.
Butterfly plate: A disc-shaped structure with sealing material fitted around its edges, rotating around the valve stem's central axis.
Valve stem; connects the handle and the butterfly disc, transmitting rotational force.
Sealed valve seat: Provides the sealing function and is typically made of rubber.
Transmission: It can be worm gear transmission, handle control, electric actuators, and pneumatic actuator control.
Type A butterfly valves in sizes DN50–DN350 comply with flange connection standards including GB9112-88, DIN 2501 (Germany), BS 4504 (UK), ISO 2084, ISO 2531 (international standards), BS 10-E (UK), and ANSI 1259 (US). For DN400–DN500 sizes, the valves adhere to GB9112-88, DIN 2501, ISO 2084, and BS 4504 flange connection standards.
Detailed introduction:
This product is made from ductile cast iron, while the butterfly disc is crafted from 304 stainless steel, offering excellent corrosion resistance and a long service life, making it suitable for a wide range of media. The valve seat features an EPDM rubber seal, ensuring superior sealing performance and reliable operation—capable of handling most common media such as water and air. If the medium contains oily substances, the seal can also be easily replaced with an NBR (nitrile-butadiene rubber) version. Additionally, the worm gear head utilizes a precise worm-and-gear mechanism to deliver accurate valve control, delivering advantages like exact transmission ratio, smooth operation, minimal noise, and self-locking functionality.
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