Electric Center Line Folder Soft Seal Butterfly Valve

• Media: Water, Oil, Gas and Other Non-Causticity Medium
• Driving Mode: Electric
• Structure: Double-Eccentric Sealing
• Seal Form: Supercharging Pressured Sealed
• Work Pressure: Mid-Pressure (2.5mpa< Pn <6.4mpa)
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Model NO.: D971X-10/16
• Material of Seal Surface: Soft Sealed
• Application: Industrial Usage, Water Industrial Usage
• Service: OEM/ODM
• Shelf Life: 18 Months
• Transport Package: Poly Bag, Inner Box, Outer Carton /and Pallet
• Trademark: DAISEN
• Origin: China
• HS Code: 8481804090
• Production Capacity: 80000t/Year

Product Description

Centerline Seal Butterfly Valve

With the disc seal center of butterfly valve and rotation center of stem overlapped,sealing load Will be produced between the sealing faces of seat and disc under certainmagnitude of interference. Thus to ensure effective seal of valve. Lined with rubber on body.This structure is applicable for me-dium and small-bore butterfly valves. Due to thedeformation under extrusion.during the process of opening and closing, disc is alwaysunder extrusion.So. the upper and lower valve shafts are seriously extruded, whichcan be bad to the service life of valve. And. the open-close moment of valve is rela-tively high. The defect is that disc and seat are always under extrusion, scra- tch, highresistance andserious adrasion. To overcome extrusion and scratch and to ensuregood seal, seat basically uses rubber or PTFE,or other elastic materials. However,temperature can be a problem. This is why butterfly valves are ,conventionally, notresistant to high temperature.

 

Design Standard		GB/T12238			API609,MSS SP-67
Pressure-Temperature Rating		GB/T12224			API609
Face-Face		GB/T12221			API609
Flange Ends		GB/T9113,JB/T79			ASME B16.1\B16.5\B16.47\BS4504
Inspection&Test		JB/T9092,GB/T13927			API598
Norminal Pressure(MPa)		1.0	1.6	2.0	CLASS125	CLASS150	CLASS250
(MPa) Test Pressure	Shell Test	1.5	2.4	3.0	1.55	2.94	3.11
	High Pressure Seal Test	1.1	1.76	2.2	1.13	2.16	2.28
	Low Pressure Seal Test	0.6	0.6	0.6	0.6	0.6	0.6
Applicable Temperature		-10ºC~90ºC() Different raw material for different work temperature
Applicable Medium		Water,oil,gas and other non-causticity medium(Different raw material for different medium)

No	Part Name	Materials	Opptional Materials
1	Body	Cast Iron	Ductile Iron/Carbon steel
2	Seat	NBR or EPDM	Neoprene,PTFE
3	Disc	Ductile Cast Iron	Aluminum Bronze,SS,Mnel
4	Bushing	PTFE	Luberized Bronze
5	Pin	316	Mnel
6	Stem	2Cr13	SS,Mnel

D971X DIMENSIONS

	H1	H2	C	L	E	Kg
DN	80	377	420	42	311	23
DN	89	391	420	45	311	24
DN	95	397	420	46	311	25
DN	114	416	420	52	311	26
DN	127	429	420	55	311	27
DN	139	442	420	56	311	28
DN	175	476	420	61	311	33
DN	203	527	550	66	406	44
DN	242	572	550	77	406	58
DN	267	603	550	77	406	66
DN	309	855	560	87	620	96
DN	328	883	560	106	620	158
DN	361	950	560	132	620	188
DN	459	981	560	152	620	248
DN	520	1056	714	163	755	404
DN	591	1066	714	188	755	488
DN	656	1163	714	203	755	910
DN	721	1165	714	216	755	1100
DN	780	1280	714	254	755	1390