Purpose and characteristic

Soft sealing butterfly valve is suitable for water supplying and draining .gas pipe as adjust flux and cut off medium in foodstuff,pharmacy ,chemical industry,petroleum,electric power,light textile,paper making etc with temperature<120C,nominal pressuer<1.6Mpa.The main characteristic such as:

1.Novel and eaonable design,special structure,light and start and stop rapidly.
2.Tiny operative moment,operation conveietly and skillfully.
3.lnstallation in any position,easy to maintain
4.lt can exchange sealed comopnent,antisepsis,reliable hermetical capacity and seal in double direction with zero leakage.
5.Hermetical material aging resistant,antisepsis,and long service life etc.

Adoption standard:
D：GB／T12238-1989；
lS0 10631-1994or BS EN593-1998
Flange connection dimension:GB/T17241．6-1998：
IS0 7005-2 or BSEN 1092-2002
Structure length: GB/T1 2221-1989：
lS0 5752-1988 or BS EN558-1
Pressure test：GB/T13927-1 992；JB/T9092-1999；
lS0 5028-1993 or BS 6755-l-1986

Main technology parameter

Nominal diameter	DN(mm)	50～2000
Nominal pressuer	PN(MPa)	0.6	1.O	1.6
Test pressurePs(MPa)	Shell test	0.9	1.5	2.4
	Seal test	O.66	1.1	1.76
Appropriate medium	Air,Water,Sewage,Steam,Coal gas,il etc.
Drive modality	Hand.Worm wheel drive ,Pneumatic drive.Electric drive

Material for main parts

Parts name	Material
Body	Ductile castiron,Cast steel,Alloy steel,Stainless steel
Disc	Gray cast iron,Ductile cast steel,Cast steel,Stainless steeland ad hoc material
Seal ring	Manifold rubber
Stem	Stainless steel
Packing	OType ring Flexiblegraphite

Butterfly valve seal material choice and appropriate temperature

Material variety	Neoprene	Styrene rubber	Ethane propyl rubber	PTFE	Silicon rubber	Fluorine rubber
Code name	×或 0rJ	XA或orJA	XB或orJB	xC、JC或0rF	XD或orJD	× E或orJE
Resistance highest temperature	82℃	93℃	150℃	232℃	250℃	204℃
Resistance lowest temperature	-40℃	-40℃	-40℃	-268℃	-70℃	-23℃
Appropriate working temperature	≤65℃	≤80℃	≤120℃	≤ 00℃	≤200℃	≤180℃