MUSIC NOTE SEAL/J TYPE SEAL
| SOLID BULB |
| A |
B |
C |
Material |
| mm |
mm |
mm |
|
| 44 |
125 |
14 |
NR, CR, EP |
| 44 |
100 |
14 |
NR, CR, EP |
| 35 |
100 |
12 |
NR, CR, EP |
| 32 |
90 |
12 |
NR, CR, EP |
| HOLLOW BULB |
| A |
B |
C |
D |
Material |
| mm |
mm |
mm |
|
|
| 45 |
160 |
14 |
19 |
NR, CR, EP |
| 45 |
130 |
20 |
19 |
NR, CR, EP |
Dam Gate Seals, Bulb Seals, PTFE Seals,
Common Sizes and the arrangement of Music Note Seal over the seal base plate. The initial interference note type seal shall vary from 2 to 5 mm depending upon the requirement and type of its installation discretion of the designer.
The music note is generally recommended to be used on gates operated for head up to 30 meters. Hollow bulb music note seal is recommended for gates operated at low head up to 15 meters.
A Solid bulb music note seal is recommended for gates operated at medium head, that is at a head exceeding 15m but less than 30m
Dam Gate Seals, Bulb Seals, PTFE Seals,
Dam Gate Seals, Bulb Seals, PTFE Seals,
Bridge Bearings,Neoprene Bearings
Dam Gate Seals, Bulb Seals, PTFE Seals,
STEM SEAL
| HOLLOW BULB |
| A |
B |
C |
D |
Material |
| mm |
mm |
mm |
mm |
|
| 45 |
160 |
14 |
19 |
NR, CR, EP |
| 45 |
130 |
20 |
19 |
NR, CR, EP |
| SOLID BULB |
| A |
B |
C |
Material |
| mm |
mm |
mm |
|
| 45 |
160 |
14 |
NR, CR, EP |
| 45 |
130 |
20 |
NR, CR, EP |
| 33 |
150 |
12 |
NR, CR, EP |
| 30 |
100 |
12 |
NR, CR, EP |
This type of Seal is used for heads exceeding 30m . The sealing will be obtained due to interference pressure between the seal seat and seal and also behind the seal in space between the seal base plates. The sealing element should project 6mm beyond the face of the clamps. The initial interference of 2 to 5 mm the plane of the sealing bulb and the sealing face of the seal seat is usually provided.
This type of Seal is used for heads exceeding 30m . The sealing will be obtained due to interference pressure between the seal seat and seal and also behind the seal in space between the seal base plates. The sealing element should project 6mm beyond the face of the clamps. The initial interference of 2 to 5 mm the plane of the sealing bulb and the sealing face of the seal seat is usually provided.
DOUBLE BULB SEAL
These type of seals are used where the gate is required to seal from either upstream or downstream side. These are normally used for installation such as lock gates.
| SOLID BULB |
| A |
B |
C |
Material |
| mm |
mm |
mm |
|
| 44 |
155 |
12 |
NR, CR, EP |
| HOLLOW BULB |
| A |
B |
C |
D |
Material |
| mm |
mm |
mm |
|
|
| 44 |
155 |
12 |
19 |
NR, CR, EP |
Z TYPE AND L TYPE SEALS
Z TYPE SEAL
These seals are moulded or extruded to the shape required and the sealing effect is obtained partly due to initial interference with the embedded sealing plate and partly due to the deflection under load. To ensure even tightening of seals and thus to avoid waviness of the deal, brass spacer tubes may be used. This type of seal is used on gates on the cresis of dams and weirs.
| SOLID SEAL |
| A |
B |
C |
D |
E |
Material |
| mm |
mm |
mm |
mm |
mm |
|
| 30 |
103 |
|
25 |
36 |
NR, CR, EP |
L TYPE SEAL
| SOLID SEAL |
| A |
B |
C |
D |
Material |
| mm |
mm |
mm |
mm |
|
| 90 |
75 |
20 |
18 |
NR, CR, EP |
| SOLID SEAL |
| A |
B |
C |
D |
Material |
| mm |
mm |
mm |
mm |
|
| 78 |
78 |
23 |
15 |
NR, CR, EP |
NR - NATURAL RUBBER, CR - CHLOROPRENE RUBBER, EP - EPDM RUBBER
FLAT SEALS AND WEDGE SEALS
These seals are used generally as bottom seals for all types of gates and the seal against bottom sealing plate. They require high initial compression loading for proper seating. The projection of bottom wedge seal shall vary from 2 to 5 mm depending upon the requirement and type of installation at the discretion of the designer.
| FLAT SEAL |
| A |
B |
Material |
| mm |
mm |
|
| 100 |
12 |
NR, CR, EP |
| 100 |
20 |
NR, CR, EP |
| 119 |
19 |
NR, CR, EP |
| 75 |
12 |
NR, CR, EP |
| 75 |
14 |
NR, CR, EP |
| WEDGE SEAL |
| A |
B |
R |
Material |
| mm |
mm |
mm |
|
| 75 |
12 |
6 |
NR, CR, EP |
| 75 |
14 |
7 |
NR, CR, EP |
| 100 |
20 |
10 |
NR, CR, EP |
| 100 |
14 |
7 |
NR, CR, EP |
| FLAT SEAL |
| A |
B |
R |
Material |
| mm |
mm |
mm |
|
| 125 |
25 |
20 |
NR, CR, EP |
| 100 |
20 |
15 |
NR, CR, EP |
| 100 |
14 |
10 |
NR, CR, EP |
| WEDGE SEAL |
| A |
B |
C |
D |
Material |
| mm |
mm |
mm |
mm |
|
| 75 |
12 |
6 |
6 |
NR, CR, EP |
| 75 |
14 |
18 |
8 |
NR, CR, EP |
| 75 |
16 |
10 |
10 |
NR, CR, EP |
| FLAT SEAL |
| A |
B |
Material |
| mm |
mm |
|
| 100 |
8 |
NR, CR, EP |
| 150 |
6 |
NR, CR, EP |
| 100 |
3 |
NR, CR, EP |
| 65 |
8 |
NR, CR, EP |
| 75 |
12 |
NR, CR, EP |
| 75 |
14 |
NR, CR, EP |
| 120 |
20 |
NR, CR, EP |
| 100 |
12 |
NR, CR, EP |
| 100 |
14 |
NR, CR, EP |
PTFE / TEFLON CADDED SEAL
Rubber seals are metal cladded to reduce frictional force. These seals are less flexible than rubber seals. These seals are less effective to cover the deficiencies caused by misalignment in the embedded metal of the gate or variations in the gate fabrication. To overcome the drawback of reduced flexibility of fully cladded seals and to cover some degree of misalignment of either the gate or embedded parts, cladding may be provided on portion of the seal.
| SOLID BULB |
| A |
B |
c |
Material |
| mm |
mm |
mm |
|
| 44 |
125 |
14 |
NR, CR, EP |
| 44 |
100 |
14 |
NR, CR, EP |
| 35 |
100 |
12 |
NR, CR, EP |
| 32 |
90 |
12 |
NR, CR, EP |
| HOLLOW BULB |
| A |
B |
c |
D |
Material |
| mm |
mm |
mm |
mm |
|
| 44 |
125 |
14 |
19 |
NR, CR, EP |
| 44 |
100 |
12 |
19 |
NR, CR, EP |
| 35 |
100 |
12 |
10 |
NR, CR, EP |
| SOLID BULB |
| A |
B |
c |
Material |
| mm |
mm |
mm |
|
| 45 |
160 |
14 |
NR, CR, EP |
| 45 |
130 |
20 |
NR, CR, EP |
| 33 |
150 |
12 |
NR, CR, EP |
| 30 |
100 |
12 |
NR, CR, EP |
| HOLLOW BULB |
| A |
B |
c |
D |
Material |
| mm |
mm |
mm |
mm |
|
| 45 |
160 |
14 |
19 |
NR, CR, EP |
| 45 |
130 |
20 |
19 |
NR, CR, EP |
