Usage:
Bi-directional seated butterfly valve is researched and developed by our factory in 1992. After continuous improvement and perfectness, the product has got the National Patent two times (ZL 91216899.4; and ZL 9824210.4). The product has experienced long term practical practice and its performance has taken lead level in domestic. It is widely used in industry pipeline of water supply and drainage, petroleum, power, city construction as throttling or adjusting medium flux.

Our this valve has three type: double offset metal seated and soft seated butterfly valve, triple offset metal seated butterfly valve


Product standard and specification:
Design and manufacture： API609、MSS SP-67、MSS SP-68、ASME B 16.10
Face to face length： API609， ASME B 16.10， MSS SP－68， MSS SP－67
Flange connection： ASME／ANSI B 16.5， ASME B 16.47， MSS SP－44， API 605
Inspection and test： API598

Material of main spare parts:

Body	Disc	Stem	Bushing(bronze)	Seat
WCB 65-45-12	WCB 65-45-12	304 316 410	A D E	CR NBR 321

Technical Performance Parameters

Class		150Lb
DN(NPS)	Wafer type	3~48in
	Flange type	3~60in
Seal Test	ACC. to API598
Strength Test
Applicable Temperature	Rubber seated	-20~200℉
	Metal seated	-20~400℉
Applicable Medium	Water, oil, air and weak corrosive fluid
Operation Mode	Worm gear operated, electric operated