Butt-Clamped Type Pastern Butterfly Valve

Butt-clamped type pastern butterfly valve structure and usage

The open-close piece of the valve is a round-disk butterfly board and by rotating around the axis of its own inside of the valve body, carries out the open-close or adjusting functions. It features by:
1、Simple structure, small volume and light weight
2、Quick open-close, labor saving and small fluid resistance
3、Good adjustable performance, can be adjusted flexibly within 0~900, suitable for the pipeline of water supply and drainage, high buildings, fire-fighting, petroleum, chemical industry, medicine, food industries etc. to act as open-close or adjustment.

Butt-clamped type pastern butterfly valve product manufacture and acceptance standards

a. Standards of design ：JB/T8527、API1609、JIS B2064
b. Standards of flange：GB9115
c. Structural length： GB12221、GB/T15188.2
d. Testing standards: GB/T13927、JB/T9092

Butt-clamped type pastern butterfly valve smain technical parameter

DN(mm)		50~3000
PN(MPa)		0.25	0.6	1.0			1.6
Test pressure (MPa)	Shell test	0.375	0.9	1.5			2.4
	Sealing performance	0.275	0.66	1.1			1.76
Applicable medium		Water、 Steam、 Oil、 Sea-water、 acid
Working temperature(℃)		J NBR	Ethylene-propylene rubber		PTFE	Silicon rubber		Flu rubber
		-20~+80	-40~+150		-40~+150	-70~+25		-15~+250

Butt-clamped type pastern butterfly valve smaterial for main parts

Name of parts	Material
Body	C.l, Ductile iron, No25, WCB, Stainless steel
Butterfly board	C.l, Ductile iron, No25, WCB, Stainless steel
Stem	Grade , WCB, Stainless steel
Sealing face	Neoprene, NBR, EPOM, PTFE
Packing	PTFE , Flexible granite, NBR, V washer

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