D343 Flanged Butterfly Valve

D343 Flanged Butterfly Valve (Triple-Eccentric, Turbine-Actuated, Flanged Connection): Featuring a triple-eccentric design, the valve stem axis is offset from both the center of the disc and the center of the valve body, while the sealing surface incorporates an inclined conical angle. During opening and closing operations, the disc instantly disengages from—and subsequently re-engages with—the seat; this ensures friction-free movement throughout the entire stroke, resulting in virtually zero wear on the sealing surfaces.

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Specification
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Design Features:
Flanged ends:
JB/T 79-2015, GB/T 9124.1-2019
Test & inspection:
GB/T 13927-2022 JB/T 9092-1999

Main parts and materials

ITEM

PART

MAIN MATERIAL

Under cover

F304 F304L F316 F316L WCB

Body

CF8 CF3 CF8M CF3M WCB

Stem

F304 F316L 2CR13

Disc

CF8 CF3 CF8M CF3M WCB

Seat

NBR/PTFE/SS+SS+Flexible Graphite

Packing

Flexible Graphite

Gland Packing

CF8 CF3 CF8M CF3M WCB

Ycke

WCB

Stud

B8 B7

Worm Gear

nodular Cast Iron

Main dimensions(PN16) GB/T 9124.1-2019

DN	L	D	D1	D2	n-Φd	b
50	108	165	125	102	4-Φ18	18
65	112	185	145	122	8-Φ18	18
80	114	200	160	138	8-Φ18	20
100	127	220	180	158	8-Φ18	20
125	140	250	210	188	8-Φ18	22
150	140	285	240	212	8-Φ22	22
200	152	340	295	268	12-Φ22	24
250	165	405	355	320	12-Φ26	26
300	178	460	410	378	12-Φ26	28
350	190	520	470	438	16-Φ26	30
400	216	580	525	490	16-Φ30	32
450	222	640	585	550	20-Φ30	40
500	229	715	650	610	20-Φ33	44
600	267	840	770	725	20-Φ36	54
700	292	910	840	795	24-Φ36	58
800	318	1025	950	900	24-Φ39	62
900	330	1125	1050	1000	28-Φ39	64
1000	410	1255	1170	1115	28-Φ42	68

The dimensions above are for reference only.

Zhongchi Valve Group Co., Ltd. was established in April 2008. The company is a valve manufacturing enterprise that integrates design, development, production, and sales. It is located in the Binhai Industrial Park of Wenzhou Economic and Technological Development Zone.
The company adheres to the corporate tenet of "quality-oriented, innovation-driven, management-efficient, and service-focused", and upholds the business philosophy of "service-oriented and integrity-abiding". We provide customers with reliable quality assurance through advanced technology and scientific management, offers services with a complete range of products and a short delivery time, and strives to achieve the corporate goal of "building an excellent enterprise and creating a brand in the industry". The company has successively obtained ISO9001 international quality management system certification, ISO14001 environmental management system certification, ISO45001 occupational health and safety management system certification, special equipment manufacturing production license TS certification, CE certification, EAC certification, API607 fire protection certification, and has been recognized as a small and medium-sized technology enterprise in Zhejiang Province and a national high-tech enterprise.
The company's main products include ball valves, gate valves, globe valves, check valves, filters, butterfly valves, etc. These products are widely used in various industries such as petroleum, chemical, natural gas, light industry, electric power, pharmaceuticals, dyes, metallurgy, fiber, leather making, textile, food, military, construction engineering, refrigeration, water supply, and more.