ISO 9001 : 2015 Certified Company

Product Code : PS31 Category

Conical Spring Unbalanced Seal

Characteristics :

Standard design, Single mechanical seal, Unbalanced, Inside mounted, Dependent of direction of rotation.

Operating :

Shaft Diameter 20mm to 100mm
Pressure 10 bar (max.)
Temperature -20°C to 120°C


Ashish Seals is counted amongst one of the distinguished Manufacturer, Suppliers and Exporters of the Conical Spring Unbalanced Seals and an ISO Certified company. Located in Mumbai, India, the offered seal is rugged in design that finds its wide application for different purposes. It is used to handle corrosive chemicals, chemical process pumps, water, sewage & submersible pumps as well as light and general chemicals.

Working Principle

Conical Spring Unbalanced Seal is a compact design seal that eliminates the need of extra axial and radial space for its installation. It is developed to resist extreme corrosive chemicals such as salts, concentrated acids, strong reducing and oxidizing agents. The seal is single conical spring, unbalanced seal that has O-ring that is provided for secondary sealing purpose. As the torque transmission is done by the single coil springs, these seals depend on the rotation’s directions. This is seen from the drive end of the shaft. Due to the presence of taper spring having different dimension, it suits many media. Left handed & right handed springs are provider for anticlockwise and clockwise rotating shafts respectively. It can easily dismantle and assembled as has fewer parts. The seals are known to handle contaminated liquid and thus, spring clogging does not take place.


– Large choice of materials.
– No damage of the shaft by set screws.
– Insensitive to low solids content.
– Short installation lengths possible.
– Variants with shrink-fitted seal face available.
– Universal application opportunities.

Data Flow Chart

# Description
1 Mating Ring
2,4 O-ring
3 Seal Ring
5 Thrust ring
6 Spring
7 Drive Collar
8 Grub screw
9 Pin

Material of Construction

  • Faces : Carbon, Ceramic, Silicon carbide, Tungsten carbide, Lecrolloy, Chrome oxide
  • Elastomers : FKM, FFKM, EPDM, NBR, Aflas, Silicon, TTV, PTFE
  • Metallurgy : SS316, SS316L, SS304


Chemical, Water, Sewage application.