9
Type
DN (mm)
PS (bar)
Leaflet no.
ISORIA 25
32--1000
25
8447.1
543.1
543.2
920.1
554.1
310.3
486
210
905
550
554
213
413
100
559
920.2
904
176
901.2
412.3
414
310.2
310.1
363
412.2
901.1
412.1
970
561
Type
DN (mm)
PS (bar)
Leaflet no.
MAMMOUTH
6/10/16/20/25
1050--4000
6/10/16/25
8612.12
554
310.1
413
213
550
940.2
920
901.2
553
310.3
904
176
412.2
414
210
940.1
100
561
970
412.1
901.1
6.3
List of Components
Part No
.
Name of Parts
100
Body
176
Bottom
210
Shaft
213
Operating shaft
310.*
Plain bearing
363
Wedge
411
Gasket
412.*
O--ring
413
Liner
414
Disc thrust plate
486
Ball
543.*
Spacer bush
550
Disc
553
Lubricating thrust insert
554
Washer
559
Gasket holder
560
Elastic pin
561
Grooved nail
900.*
Anti blow--out screw
901.*
Hexagon head screw
904
Adjusting screw
905
Tie rod
916
Plug
920.*
Nut
932
Self locking ring
940.*
Key
970
*
Identity plate
Repetitive part
6.4
Functioning principle
Description
The valve consists mainly of a body (100), operating shaft (213), shaft
(210), disc (550) and rubber liner (413).
The in--house designed formulated and manufactured rubber liner
achieves the leak tightness at shaft passages, pipe flanges and
downstream/upstream around the disc.
Disc--shaft connection:
The disc (550) is connected to the operating
shaft by key (s), or splines.
Anti blow--out device:
Every valve is fitted with an anti blow--out
device which prevents the shaft to burst off the body in case of shaft
failure. This function is achieved by additional parts.
Operation:
The valves are quarter--turn operated manually by
handles or gear box or hydraulic, pneumatic or electric actuators
mounted on the valve top plate (as per ISO 5211 standard).
