Diaphragm Mechanical Seals

Diaphragm Mechanical Seals are robust solutions ideal for pump equipment manufactures


The accommodating single springs and elastomer diaphragms make diaphragm mechanical seals ideal for general and demanding conditions. Highly proficient sealing covering all standard pump shaft working lengths and housing sizes.

TYPE 10


Resilient, single spring, rubber diaphragm seal with a Type 20 boot-mounted stationary as standard, to suit original common UK housing sizes.

TYPE 11


Single spring, resilient, rubber diaphragm seal with a boot mounted stationary.

TYPE 20


with a Type 20 boot-mounted stationary as standard, to suit original common UK housing sizes.

TYPE 22


Single spring, resilient, rubber diaphragm seal with a boot mounted stationary.

TYPE 24


Compact, single spring, rubber diaphragm seal with a Type 24 boot-mounted stationary, as standard.

TYPE N11 / U11


Single spring, rubber diaphragm seal, similar to Type 11/22, but with reduced O.D.

TYPE A1


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

TYPE A2


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

TYPE A4


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

TYPE A5


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

The Balanced Diaphragm Seals range (A1 to A5) are bi-directional, parallel spring mechanical seals. They offer superior design and performance compared to market alternatives. This has been achieved by superior face materials and innovative patented design features.

The Balanced Diaphragm Seals family includes a bellows disk as a standard design feature. This component provides radial support to the bellows. It ensures the bellows / shaft do not contact. Without the disk, the bellows ID’s would be very close to the shaft and can be problematic. This is due to bellows extrusion and shaft contact / friction.

Typical Applications

The seals are highly effective and widely utilised in pumps, mixers, agitators, compressors and other rotary shaft equipment. Often utilised for a diverse range of applications including; water, petrochemical, chemical, food processing, refrigeration and other arduous duties.

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Eastern Seals (UK) Ltd
Unit 3 Sovereign Business Park
Jubilee Industrial Estate
Ashington | Northumberland
NE63 8UG

+44 (0) 1670 840529
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