Surface Conditions and Flashes

NEED HELP?

Speak with a human to filling out a form? call corporate office and we will connect you with a team member who can help.

Get in touch

“We have been working with you since more than 10 years. During this period your quality & delivery performance found is very good. Even when we arranged a supplier meet in 2012 we awarded you as a best supplier of the year in Bought out item category. Whenever we had any new developments your support was perfect. Overall your performance was very good & we hope the same in future too, We wish you all the best for your business growth.”

Sidel India Pvt. Ltd.

“We are working with Harkesh Rubber since 3 years. Our initial development of few seals for one of the important project developed and supplied by them as per the schedule. We found the quality and commitment for overall business is good. The response and technical support for our need is fair and on-time. Overall the services and co-operation found to be satisfactory. We wish the young and energetic Harkesh Rubber team a very best in all the future endeavours.”

Festo India Pvt Ltd.

“Harkesh Rubber Industries has been our co-partner for the supply of the rubber and its allied products from past 2 years which we used in our daily final product made for Indian Railways. We find the quality of product supplied by them in superior quality which lowest lead time. Overall the services and cooperation found out to be satisfactory in all key areas.”

Crompton Greaves Limited

“In all honesty I have to say that for us it's really a pleasure to do business with you now already more than 5 years. In the whole time you had never let us down, your delivery performance is nearly perfect, the service which we get is quicker than quick. The product quality has been never a problem and when we had an issue you help us always to solve it. This reliability is where we trust in and what makes our decision to work with you also in the future very easy.”

ARCA Regler GMBH

“Dear Harkesh Rubber Team, We have been working with you since last 6 years. During this period your Quality, Delivery and Performance found very good and consistent. During the development of new products specially FKM/FPM gaskets, we had very good technical support by your team, and we hope in future it will remain same. We wish you all the best for your business growth. Thanking you,”

Georg Fischer Piping Systems Pvt. Ltd.

Surface Conditions and Flashes
Standards

1) The International Organization of Standardization (ISO) is a global federation that comprises of representatives from diverse national standards organizations.

2) ISO 3601-3 states the quality acceptance criteria for o-rings used in complex fluid systems. The dimensions are standardized in ISO 16031-1, ISO 16031-2, and ISO 3601-1.

3) ISO 3601-3 defines the surface imperfections present on o-rings and specifies the highest acceptable limits for those defects.

4) ISO 3601-3 is also relevant to o-rings used in aerospace applications.

Surface defects and flashes on o-rings are determined by cleanliness, tolerance, and finish. These imperfections are established during the production process of o-rings. Several causes include:

Inaccurate de-burring
Insufficient flow of the elastomer
Inclusion of air
Inaccurate de-burring
Inaccurate temperatures

Grades

The elastomer grades specify the quality level with respect to its surface condition. They are as follows:

1) Grade N (General Purpose) – Acceptance standards for o-rings intended for general use.

2) Grade S (Special) – Acceptance standards for o-rings intended for applications needing good quality and precision with regards to dimensional tolerances of surface defects.

3) Grade CS (Critical Service) – Acceptance standards for o-rings intended for applications needing high quality and precision with regards to dimensional tolerances of surface defects.