elastomeric diaphragms
- December 20, 2022
Used as protective devices designed to isolate pressure gauges, pressure transmitters, and pressure switches from potentially damaging process media, diaphragm seals provide effective solutions to protecting pressure instruments. Typically used in refining, petrochemical, and chemical plants, they can help extend the lifetime of various instruments by preventing contact between dangerous hot or corrosive media and the gauge.
Diaphragm seals were especially designed to meet the safety demand requirements of the process industry to offer the utmost of protection against harsh temperatures, variable pressure ranges, pulsation, vibration, aggressive chemicals, and steam.
Understanding How the Seal Actually Works
A diaphragm seal is usually connected to the measuring instrument using a direct connection or capillary. It is an elastomer or flexible metal diaphragm that keeps the process media from coming into contact with the workings of the gauge. The chamber between the
- September 22, 2021
Not all applications are created equal, and when the application is especially demanding, one, at times, must consider different solutions.
Such is the case regarding air operated double diaphragm (AODD) pumps. Typically, applications associated with this type of pump involve chemical compatibility 0.0 issues, abrasive element concerns, or a combination of the two.Some examples include:
- Mining applications involving slurries of acids and solids
- Paint and coatings applications including chemical compatibility issues relating to solvents/additives and abrasion from pigments
- Ceramics
- Chemical processing
- Pulp and paper
- Similar applications using process media with abrasive solids
- October 06, 2020
In the safety-driven natural gas industry, system leaks are a dangerous and costly issue. Residential gas meters and regulators, in particular, are at risk when crucial components such as diaphragms are not optimally designed and manufactured for the environment in which they will work.
An advanced polymer technology, trademarked by Freudenberg Sealing Technologies’ Metflex Precision Moulding organization, addresses these challenges with fiber-reinforced materials that improve the reliability, functionality and longevity of critical gas system components. Diaphragms made using Metflex Dispersed Fibre Technology (DFT)™ offer better sealing performance, longer flex life, improved low temperature resilience and enhanced design capabilities than standard diaphragms made from fabric coated polymers. To date, more than 40 million DFT diaphragms have been used in medium and low-pressure application, primarily in North America but also in other regions of the world.
Safety concerns and costs associated with gas leaks and equipment failures
- October 22, 2015
Pumps that operate with a diaphragm have been in use since the mid-1800s because of their simplicity and effectiveness.
That isn’t to say these pumps have remained unchanged in all that time. More than 150 years of innovation and technical improvements in diaphragm profiles and elastomeric material sciences have secured their use for a wide range of pumping and reciprocating applications.
The design and utilization of diaphragms in pumping applications is a vast topic, yet it is one that Gallagher Fluid Seals’ application engineers have mastered by approaching the manufacturing and design of diaphragms with a step-by-step process.
The result is diaphragms that are expertly designed and made from the most appropriate material and crafted in a way that optimizes cost and manufacturability. Freudenberg-NOK Sealing Technologies are our vital partners in this process, and are worldwide leaders in the diaphragm field.
