High Quality Center Line Folder Soft Seal Butterfly Valve

• Media: Water,Oil,Gas and Other Non-Causticity Medium
• Driving Mode: Manual
• Seal Form: Supercharging Pressured Sealed
• Work Pressure: Mid-Pressure (2.5mpa< Pn <6.4mpa)
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Soft Sealed
• Model NO.: D671X-10/16
• Application: Industrial Usage, Water Industrial Usage
• Service: OEM/ODM
• Shelf Life: 18 Months
• Transport Package: Poly Bag, Inner Box, Outer Carton /and Pallet
• Specification: DN50-350
• Trademark: Daisen
• Origin: China
• HS Code: 8481804090
• Production Capacity: 60000PCS Per 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

 

	H1	H2	C	L	Kg
DN	62	240	152	42	4
DN	70	265	202	45	6
DN	89	271	202	46	6
DN	106	295	202	52	8
DN	120	320	230	55	10
DN	132	348	272	56	13
DN	164	418	308	60	24
DN	200	451	360	66	31
DN	238	500	380	77	46
DN	280	576	487	77	72