Basic Info.

Model NO.

D71X-10/16

Service

OEM/ODM

Trademark

DAISEN

Model NO.

D71X-10/16

Service

OEM/ODM

Trademark

DAISEN

Product Desciption

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,Viton,PTFE
3	Disc	Ductile Cast Iron	Aluminum Bronze,SS,Mnel
4	Bushing	PTFE	Luberized Bronze
5	Pin	316	Mnel
6	Stem	2Cr13	SS,Mnel

 

	A	H1	H2	L	Kg
DN50	267	80	161	42	4
DN65	267	89	175	45	5
DN80	267	95	181	46	6
DN100	267	114	200	52	8
DN125	313	127	213	55	9
DN150	313	139	226	56	12
DN200	359	175	260	61	19