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Parallel Spring Seals

Widely used as the standard upgrade from packing to mechanical seals, parallel spring seals are common place in industry. General applications include but are not limited to Water, Food and Chemical processes. They can be utilised in many pumps, mixers, agitators and compressors.

The majority of Parallel spring designs utilize a rubber diaphragm to seal against the shaft and provide drive to the face. Parallel spring designs that utilize an o-ring to seal against the shaft are driven by the spring.

Designs PAU, PBU, PDU & PEU are balanced, reducing heat and friction at the faces. This prolongs life and allows for higher operating parameters.
Maximum Operating Limits 
Pressure12 bar (Unbalanced) 13 bar (Balanced)
Speed15 m/s (Unbalanced) 18 m/s (Balanced)
Temperature-40°C to +200°C
Elastomer Material Availability
Material
Temperature
Recommendations
Ethylene Propylene
-40°C to +140°CGeneral applications, especially hot water. Must not come into contact with Oils.
Nitrile
 -30°C to +120°CStandard Material. Suitable for medium duty applications. Not recommended for hot water.
Viton®
-30°C to +230°C
Suitable for general chemical applications. Not recommended for hot water.
Other materials available on request.
Face Combinations (Stationary)
Carbon
Alumina Ceramic Silicon Carbide 
Not Available
 Not AvailableBBD Type Seals Only
Standard Duty
Not Available
Not Available
Increased Performance
Not AvailableRecommended For Aggressive Media
Other materials available on request.

Face Combinations (Rotary)
Carbon
Alumina Ceramic Silicon Carbide 
Not Available
Not AvailableBBD Type Seals Only
Standard Duty
Not Available
Not Available
Increased Performance
Not AvailableRecommended For Aggressive Media
Other materials available on request.
NL: 072 - 514 18 44
BE: 03 829 27 12
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This is a printed version of Mechanical-Seals.info of ERIKS nv.
© ERIKS nv, 2016.