The Saunders® Industrial Diaphragm Valve, first developed more than seventy years ago, has evolved to handle more fluids, gases, solids, and powder than any other type of valve. A wide choice of materials are available and a flexible range of operating methods have been developed to satisfy the needs of most industrial applications.

Extended life, reliability, safety and ease of use, combined with an essentially simple design, facilitate low maintenance and minimal running costs. When subjected to both pressure and vacuum, Saunders® diaphragm valves operate and close 100% leaktight. This feature reduces processing and handling costs by cutting out the waste normally associated with conventional valve designs.

Saunders offers a full range of diaphragm selections engineered to meet the exacting demands of our industrial customers. All grades of rubber and PTFE have been developed to suit individual customer requirements and are proven, even in the most arduous environments.

All Saunders diaphragms are made from high quality materials and are manufactured in-house to strict quality standards. This is borne out by the fact that all diaphragms are fully traceable in accordance with EN10204 3.1. This gives our customers the assurance of consistent, reliable and repeatable quality resulting in consistent, reliable and repeatable process performance.

To assist in the selection of the best diaphragm materials please use the Saunders material selection program or alternatively, please feel free to contact our customer service group, who will be happy to assist you with the best recommendation for your application.

IDV Brochure


 Saunders® eXtreme Range Industrial Diaphragm

The Saunders IDV diaphragms are changing and will be known as the eXtreme range. The table below outlines the changes in terms of the diaphragm grade, and also, the diaphragm material.

The older, existing, diaphragm grades will be rationalised from the IDV diaphragm range and will become obsolete from 31st March 2020. In the interim we will have both grades and the material in the description but only the grades on the packaging i.e. ‘XB (300) Diaphragm’.

The Saunders® eXtreme elastomer range will provide reliable and cost effective solutions in a wide range of applications and Saunders® high performance PTFE range will cater for highly demanding chemical processes. The new addition in the range is diaphragm grade ‘KC’ (three-layer Chlorine diaphragm), specifically aimed at highly aggressive Chlorine applications. This diaphragm comprises of PTFE facing with a PVDF interlayer and backing of FKM material, with a titanium stud, which offers enhanced corrosion resistance, resulting in an extended life with reduced downtime in the Chlor Alkali industry. These grades are for industrial applications and therefore will not carry FDA/USP6 certification. If certification is a requirement the HC4 diaphragm range must be requested.

Apart from ensuring high quality performance, Saunders IDV spare diaphragms will now be available in new EZOPEN recyclable bags, which will minimise the need for the use of any sharp objects or physical effort. The purpose is to enhance safety at the work place, reduce the opening time, and also prevent diaphragm damage during the process. The QR code provided on the diaphragm bag will aid in easily obtaining technical information as well as recommended applications.

Easy Open Bags

Saunders eXtreme Range Diaphragm Brochure


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