Unbalanced Seal Single Acting, Dependent of Direction of Rotation 
Seal Series 2U 
Standard Style
Face Materials
Cast Chrome Steel, Carbon, Ceramic (99.5%). 
Tungsten Carbide, Silicon Carbide.

Metal Parts
AISI 316 

Secondary Seals

bullet   Elastomers


bullet   Water Pumps 
bullet   Circulation Pumps for central heating/AC 
bullet   Chemical Process Pumps 
bullet   Sewage & Submersible pumps

Seal Characteristics

bullet   Single Acting
 bullet   Inside mounted
 bullet   Dependent of Direction of Rotation
 bullet   Unbalanced
Operating Limits
Shaft Diameterd1:  6 …. 80 mm 
Pressure pp:  10 bar 
Temperaturet:  -20 … +180 o C 
Velocityv:  20 m/s. 

Series 2U is a single conical helical spring unbalanced seal with ‘O’ ring as secondary sealing member. Various seal face materials and elastomers can be offered for wide service application. As the torque transmission is done by conical helical spring, these seals are dependent of the direction of rotation. Direction of rotation is seen from the drive end of the shaft. Clockwise rotating shaft requires right handed spring and anti-clockwise rotating shaft requires left-handed spring. For easier fitting the conical helical spring should be pushed on the shaft with a twisting motion in the sense of the spring winding. This movement enlarges the diameter of the spring, enabling easy fitment.


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