Case Study – Special EPDM Compound Diaphragm for Aircraft Engine Application


The Client is an established Control Valve Manufacturer from America.




The vendor who provided the rubber seals for the client for almost 5 decades was acquired by the competition. Since the vendor had to comply to military secrecy, they stopped sharing the information with the client regarding the base polymer, physical properties required, and other necessary details.


This put the client in a fix as they did not have the required details about the parts supplied by the vendor. They also needed to manufacture a special diaphragm to support a huge military account in the USA.




Harkesh Rubber came in contact with the valve manufacturer. Since we had the experience to meet their moulding requirement, we soon figured out the need to develop a suitable compound formulation for this application.


Once we took the feedback from the customer regarding the application and approval tests required, we determined that the compound needed to work in Aviation Turbine Fuel. After that, we selected the EPDM material for the application. We also reviewed the old material test certificates of the previous vendor and deciphered the special needs the compound would require, like the use of silicone oil and very high elongation.




With our analysis and research, we developed a special EPDM compound that was suitable for work in Aviation Turbine Fuel at high temperatures and with a work cycle in excess of 10,000 hours. We created diaphragm samples from the compound and supplied them to the client. They assembled the components and delivered them to the leading Aircraft Engine Manufacturer. Once the trials were conducted over a year, the diaphragm and the compound were approved.




The client was able to retain their account with the leading Aircraft Engine Manufacturer.


Since 1982, we have built a reliable reputation in the rubber industry on our unique solution based approach that has made us the preferred partner for critical sealing solutions. We provide high precision, cost-effective sealing solutions for technically demanding applications.

Valve World Expo: The Biggest Valve Industry Affair Under One Roof!

The Valve World Expo is the biggest ground to showcase and encounter the experts from the valve industries around the world. It is a one-stop shop that will assemble many great minds and act as a platform to meet proficient valve industrialists who will display their products at a large scale. It is a substantial interactive platform that focuses on individual communication. Valve World Expo brings together valve expertise from the:


● Oil, Gas, Petrochemical, and Chemical Industry

● Food Processing Industry

● Marine and Offshore Industry

● Water and Waste Water Management Industry

● Automotive and Machine Construction Industry

● Pharmaceutical Industry

● Power Generation Industry


The Valve World Expo is undoubtedly the most prestigious event for anyone who uses valve technology in their business.


Harkesh Rubber has been serving the valve needs for all kinds of engineering industries for the past 35 years. Our services employ a combination of well-established product mastery and ingenious engineering. What makes us idiosyncratic are the custom-made solutions we provide with optimum quality service.


We, at Harkesh Rubber, are experienced at fulfilling the technical merchandise requirements for multiple industries within strict timelines. With a reputation for excellence around the world, we have served clients in Asia, Europe, the Middle East, the USA and many other countries.


We provide expert solutions for:


Rubber Diaphragms


The Rubber Diaphragm is a multifaceted tool that is used as a sealing agent between two elements. It has a huge demand in industries like power generation, aerospace, chemical and process, and more.




O-Rings have a variety of purposes in different application areas. They are used to stop the air from passing between the two ends. They are available in various metric and inch standard sizes. O-Rings are commonly used for plumbing purposes, automobile requirements, air-conditioning technology, and more.




The seal is used in rotary shaft equipment to keep dust, dirt, oil or any other contaminants out while keeping it lubricated. The sealing element, the metal case, and the spring are what form the oil seal.




We are well-renowned for the production of custom-made rubber gaskets. They are used to prevent leakage between two articles under compression. These gaskets are made to withstand and handle extreme pressure and wear.


Harkesh Rubber is proud to exhibit at Valve World Expo 2018. The event will be held from the 27th-29th November 2018 in Düsseldorf, Germany. Make sure to visit our booth, located at Hall 4 / F22 at the venue!


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