double flange butterfly valve DN200

double flange butterfly valve DN200 Product introduction

　double flange butterfly valve DN200 are used in on-off and control flow of medium in vaired pipelines such as foodstuff,beverage,machine,chemical engineering,industrial enviromental proction,water treatment and building ect .double flange butterfly valve DN200 Standard: ANSI, DIN, JIS, GB, etc
More Structure: Soft Seat Sealing ( Or metal seat sealing)

double flange butterfly valve DN200 Product Description
1 Body : Cast Iron: ASTM A126CL. B , DIN1691 GG25, EN 1561 EN-GJL-200;
Ductile Iron:ASTM A536 65-45-12, DIN 1693 GGG40, EN1563 EN-GJS-400-15;
Stainless Steel: ASTM A351 CF8, CF8M;Carbon Steel: ASTM A216 WCB
2 Stem: Zinc Plated Steel; Stainless Steel: ASTM A276 Type 316, Type 410, Type 420; ASTM
A582 Type 416;
3 Taper Pin : Stainless Steel: ASTM A276 Type 304, Type 316;
4 Seat : NBR, EPDM, Neoprene, PTFE, Viton;
5 Disc : Ductile Cast Iron (Nickel plated):ASTM A536 65-45-12, DIN 1693 GGG40, EN1563 EN-GJS- 400,Stainless Steel:ASTM A351 CF8, CF8M; CF3, CF3M; EN 1.4408, 1.4469; 1.4501;
AL-Bronze: ASTM B148 C95400;
6 O-Ring: NBR, EPDM
7 Bushing :Polymer water-proof materials ,Nylon, Bronze;

double flange butterfly valve DN200 Technical parameters

Description	Standard
Design and manufacture	EN593
Face to face	ISO5752 series14, EN558-1 series 14, DIN3202 F4
Flange and drilling	ISO7005-2, EN1092,
Pressure test	EN12266
Top flange of bare shaft valve	ISO5211
Top flange on worm gearbox for e-actuator	ISO5210

double flange butterfly valve DN200 Main part material

Name	Material
Body	ductile cast iron, WCB, stainless steel
Disc	ductile cast iron, WCB, stainless steel, Al-bronze
Stem	SS420, SS431
Disc seat ring	EPDM,NBR,VITON
Body seat ring	SS304
Retainer	SS304, SS316
Shaft bearing	Al-bronze, self-lubricating bearing
Bolt & nuts	8.8 grade galvanized, SS304
Coating	epoxy coating, thickness: min. 250 microns, color code: RAl5015, 5017, 5010, and etc.

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