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Stem Seal and Double Bulb Seal

Stem Seal

This type of seal is used for heads exceeding 30 m. 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 bulb should project 6mm beyond the face of the clamps. The initial interference of 2 to 5mm the plane of the sealing bulb and sealing face of the seal seat is usually provided.

These seals may be used as top, bottom and side seals either by using them with water pressure acting them which is withdrawn before the gate is moved to reduce / eliminate friction load or they may be used with metal or flurocarbon film to achieve the same purpose. On heavy gates such seals may be well bottom seals where enough mechanical compression becomes available to make a good seal.



Solid Bulb


Hollow Bulb

A (mm) B (mm) C (mm) Material
45 160 14 NR, CR, EP
45 130 20 NR, CR, EP
33 150 12 NR, CR, EP
30 100 12 NR, CR, EP



A (mm) B (mm) C (mm) D (mm) Material
45 160 14 19 NR, CR, EP
45 130 20 19 NR, CR, EP
NR = Natural Rubber • CR = Neoprene • EP = EPDM Rubber



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


Hollow Bulb

A (mm) B (mm) C (mm) Material
44 155 12 NR, CR, EP



A (mm) B (mm) C (mm) D (mm) Material
44 155 12 19 NR, CR, EP
NR = Natural Rubber • CR = Neoprene • EP = EPDM Rubber


Fenders
Seals
Cylindrical Fenders
D Type Fender
W Type Fenders
Key Hole Fenders
Square And Rectangular Fenders Delta Fenders
Arch Fenders
Cell Fenders
M Fenders
Leg Fenders
Pneumatic Fenders
Mooring Bollards
Marine Ladders
Music Note Seal / J Seal
Double Stem Seal & Double Bulb Seal
Z Seal & L Seal
PTFE / Teflon Cladded Seal
Brass / SS Cladded Seal


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