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Wilden Diaphragms from Integrity Pumps and Engineering

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article image Diaphragms

Integrity Pumps and Engineering offers various types of Wilden diaphragms made from rubber, thermoplastic and Teflon to fit specific requirements.

Rubber Diaphragms

Wilden rubber diaphragms are moulded with natural rubber and man-made additives. The unique blend increases the diaphragm’s chemical resistance and flexing characteristics.

A nylon fabric mesh is positioned within the rubber diaphragms during the moulding process to strengthen the diaphragm while dispersing stress.


  • Neoprene diaphragms are low cost general-purpose diaphragms for non-aggressive applications  
  • Buna diaphragms are low cost diaphragms for petroleum/oil-based fluids  
  • Nordel (EPDM) diaphragms offer superior flex life at extremely low temperatures  
  • Viton diaphragms offer good flex life at extremely high temperatures and can handle aggressive fluids such as aromatic or chlorinated hydrocarbons and acids  

Thermoplastic (TPE) Diaphragms 

Wilden thermoplastic diaphragms are manufactured by moulding man-made compounds into net-shaped parts. TPE diaphragms have inherent tensile strength and do not need fabric reinforcement. 


  • Polyurethane diaphragms are extremely low-cost general purpose diaphragms that exhibit good flex life in abrasive applications   
  • Wilflex (Santoprene) diaphragms are low-cost, long flex life alternatives to Teflon or PTFE in acidic and caustic applications, and can handle abrasives well   
  • Saniflex (Hytrel) diaphragms are made from FDA-approved material for food processing applications and exhibit excellent abrasion resistance

Teflon Diaphragms

Wilden Teflon or PTFE diaphragms are made from one of the most chemically-inert man-made compounds and feature concentric ribs to control the flex pattern to extend life.

PTFE is not elastic and has no memory. A Wilden back-up diaphragm is used to provide support and extend life. 

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