PRODUCT
Concentrice Large size EPDM/ NBR Seat butterfly valve
SIZE : DN50-2400
Pressure : PN10/PN16 /150LB
Desgin Standard : API609, EN558
Face to Face : ISO5752, API609, EN558
Flange end : DIN2501 , EN1092 , B16.5/16.47
Working Temperature : -20℃~120℃
Specifications:
|
Nominal pressue (MPa) |
1.0 |
1.6 |
|
|
Nominal diameter(mm) |
50-2400 |
50-2400 |
|
|
Test pressure |
Shell |
1.5 |
2.4 |
|
(MPa) |
Seal |
1.1 |
1.76 |
|
Applicable temperature |
150 |
||
|
Applicable medium |
water, Sewage, Sea water, Air, Vapor, Food, Medicine, Oils, Acids, |
||
|
Operating mode |
manual, worm gear, pneumatic, electric, etc. |
||
Standards:
|
Design & Manufacture |
Flange Connection |
Face to Face Dimension |
Test & Inspection |
|
|
DIN PN10/16 ISO PN10/16 |
API609 |
API 598 |
Material:
|
No. |
Part Name |
Material |
|
1 |
Body |
Ductile Iron |
|
2 |
Disc |
Ductile iron |
|
3 |
Seat |
EPDM/NBR |
|
4 |
Stem |
SS416 |
|
5 |
Bushing |
PTFE/Lubricating |
|
6 |
O ring |
EPDM/PEFE/Buna/NBR/Hypalon |
Centerline soft seal butterfly valve sealing structure:
1. Ordinary centerline butterfly valve, 2. Composite seat centerline butterfly valve,
3. Centerline butterfly valve covered with butterfly plate. Its sealing structure is as follows:
The rotation center of the butterfly plate (that is, the center of the valve stem) is located on the center line of the valve body and the sealing surface section of the butterfly plate.
The valve seat is made of synthetic rubber. When closing, the outer circular sealing surface of the butterfly plate squeezes the synthetic rubber valve seat, causing the valve seat to elastically deform and form an elastic force as a sealing specific pressure to ensure the sealing of the butterfly valve.
The sealing structure uses polytetrafluoroethylene and synthetic rubber to form a composite valve seat. Its characteristic is that the elasticity of the valve is still provided by synthetic rubber and uses the low friction coefficient of polytetrafluoroethylene, which is not easy to wear and not easy to age, thereby extending the life of the butterfly valve. be improved.
Its sealing principle and structural characteristics are the same as those of ordinary centerline butterfly valves.
The sealing structure uses polytetrafluoroethylene, synthetic rubber and phenolic resin to form a composite valve seat, which makes the valve seat elastic and stronger at the same time. At the same time, the butterfly plate is fully covered with polytetrafluoroethylene, so that the butterfly plate has strong corrosion resistance.
Its sealing principle and structural characteristics are the same as those of ordinary centerline butterfly valves.
