butterfly type valves

Main Features: For the structure of the triple-eccentricity seal butterfly valve, when the valve is under the complete open state, its butterfly plate sealing face will break away from the valve seat sealing face completely; when it is opened from 0 to 90°, the butterfly plate sealing face will...

Product Details

Valves size from 2" to 48", and connection ways can be lugged or semi-lugged wafer style, double flanged style, single flanged style, etc. Working pressures range can be from 150 to 250 psig. Body materials can be cast iron, ductile iron, stainless steel, wcb, etc, and the dis materials can be ductile iron (nickel coated cast iron and nylon coated cast iron are available). Valve seat materials consist of neoprene, silicone, hypalon, viton, buna n, and EPDM.

Detailed description:

Top flange: ISO 5211

Size: DN40-DN1200/1.5"-48"

Suitable temperature: Normal temperature -45℃-150℃

Normal pressure: DN40-DN600(1.5"-24") PN1.0/1.6MPa(150/200psi) DN700-DN1200(28"-48") PN1.0MPa(150psi)

Body: Cast iron/ductile iron/wcb/carbon steel/al-bronze/CF8, ss304/CF8m, ss316
Disc: Ductile iron/ni-plated ductile iron/nylon-plated ductile iron/al-bronze/rubber lined disc/1.2501/1.4529/CF8/CF8m/hastelloy alloy/monel
Stem: Ss416/ss304/ss316/ss431/17-4pH/monel/carbon steel 45/45#
Seat: NBR/hypalon/EPDM/neoprene/nr/wear-resistant EPDM/viton/silicon/heat-resistant EPDM/white EPDM/EPDM/PTFE
Medium: Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt etc.

End flange: ANSI b 16.1, ASTM b 16.47, en 1092, as 2129, ISO pn10/16, JIS b2212/2213, bs 10 table d, bs 10 table e, bs4504
Face to face: ANSI b 16.10, API 609, bs5155 short, ISO5752(series 13), DIN3202 f16


Main features:

1. The valve is equipped with eccentric tilting tapered valve seat sealing ring for the purpose if pressing out the sealing surface has small frictional resistance. When shutting off, it cleses more and more, so this makes sealing performance reliable, Opening can ensure that the sealing.
2. The special geometric structure makes the butterfly valve free of defect that other butterfly balves are unable to be sealed will due to excessively opening, so as to gurantee good sealing of the surface.
3. The double eccentric butterfly valve structure can gurantee that the valve fundtions mormally under high prssure and overcome the shortcomings that other valve easily leak due to sest deformation when they work under high pressure.




Equipped with a professional factory, Naibang Valve is a professional manufacturer and supplier of butterfly type valves in China. If you want to buy quality product of various beautiful bags, you can get it at a cheap price from us.
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