The Phase range of products are the Heap & Partners in house manufactured products, all are UK sourced materials and 100% manufactured, assembled and tested are our facility in Birkenhead on the Wirral.

Phase products have been used in the Nuclear, Oil & Gas, subsea, power generation and chemical industries around the World on some of the most arduous duties known.

Our range of products include the following:

Phase Trunnion Ball Valves

Phase Check Valves

Phase Distribution Manifolds




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Product News

Phase Range of Sprung Disc Check Valves

Heap & Partners Phase Check Valves have been specially designed to cover all of customer…

The Saunders IDV eXtreme Range

The Saunders IDV diaphragms are changing and will be known as the eXtreme range. The…

Corrosive & abrasive duty

Designed and developed by our in-house engineering team,

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