Diaphragm Mechanical Seals | Vulcan Seals
Parallel spring balanced diaphragm seals

Experience the cutting-edge performance of our A1 to A5 range, the ultimate combination of elastomeric bellows and bi-directional parallel spring seals. Engineered with superior face materials and patented design features, these seals redefine excellence in sealing technology.

Our innovative solution eliminates failures caused by excessive wear from thinner components by ensuring unmatched durability. By increasing the drive area by over 250%, we have significantly reduced contact drive pressure and subsequent wear. The drive ring is securely retained by a locking mechanism, providing added stability and reliability.

This range is hydraulically balanced, resulting in reduced heat and friction during operation, enabling higher operating parameters, pushing the boundaries of performance. To further enhance reliability, an additional drive ring supports the lip, ensuring the drive ring remains in a positive position away from the bellows.

For Types A2 to A5, we offer the convenience of retaining the base plates on the coil, providing vital support during seal fitting.

Our parallel spring balanced diaphragm seals are:
• Superior design and performance- no face damage
• Reliable seal face retention
• Guaranteed fit
• Optimised face loading gives increased seal life

For other types of diaphragm seals please click here

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Type A1

Type A1

Robust, long working length, highly accommodating and reliable, rubber diaphragm balanced seal, which provides enhanced seal capability, performance and life.

Type A2

Type A2

Robust, short working length, rubber diaphragm balanced seal with boot-mounted stationary.

Type A4

Type A4

Robust, short working length, rubber diaphragm balanced seal with boot-mounted stationary.

Type A5

Type A5

Robust, long working length, rubber diaphragm balanced seal with boot-mounted stationary.