Characteristics And Usage

The open-close pad of the valve is a round-disk butterfly board and．By rotating around the axis of its own insids of the valve body．carries Out the Open-close or adjusting function It features;1)simple structure, small volume and light weight;2)Quick open-close, labour saving and small and reeistance;3)Good adjustable performance, can be adjusted flexibly within 0～90°, suitable for the pipeline of water supply and drainage．high buildings, firefighting．petroleum, chemical industry, medicine．food etc trades to act as open-close or djustment

Product Manufacture And Acceptance Standards

Standards of design:GB12238, API609, JIS B2064;

Structural lenth:GB12221

Standard of flange:GB4216, GB9113, GB9115

Testing standards:GB/T13927, JB/T9092

 Product Manufacture And Acceptance Standards

Nominal diameter		50～3000
Nominal pressure		0.25		0.6	1.0	1.6
(MPa)	Shell test	0.375		0.9	1.5	2.4
	Sealing per- formance	0.275		0.66	1.1	1.76
Applicable		Water,Oil,Steam,Sea-water,Nitric acid
Working temperature (℃)	Sealing fale material	Rubber	NBR	Ethylene-pro-pylene rubber	PTFE	Silicon rubber	Fluorub-ber
	Workina temperature	0-+60	-20-+80	-40-+150	-40-+200	-70-+250	-15-+250

Maaterial For Main Parts

Name of parts	Material
Body	Cl,Ductile lron,No25,WCB,Crstainlesgsteel
Butterfly board	Cl,Ductile lron,No25,WCB,Crstainlesgsteel
Stem	Grade．WCB．Crstainlesgsteel
Sealing fale	Neoprene,NBR, EPOM．PTFE
Palking	PTFE, Flexible．Grapnlte.NBR V.wash