White Papers

PPE is a regular contributor to articles in trade publications and our sealing specialists present technical papers at conferences and seminars around the world.  Here we have gathered together some of the most popular topics from various industries in a series of white papers.

White Papers
Title Description Select Language

Choosing a High Temperature Steam Resistant Elastomer

There are limited options for sealing with elastomers in hot water or steam environments in temperatures up to 550°F (288°C). Most elastomers in will become brittle and crack, resulting in leakage from a valve, pump or other equipment. Leakage resulting from a cracked seal can create hazardous conditions, unnecessary downtime, and equipment failure.

This paper details the properties of EnDura® E90SR after high temperature steam exposure in comparison with other types of commercially available elastomers.

Effective Sealing for Pumps with Elastomers

Pump users demand maximum operating efficiency from their investment and sealing solutions have to be designed to function between long service intervals. These conditions often create increased chemical, thermal and pressure related stresses on both the pump and seals, multiplying the risk of seal failure and pump leakage.

Electrostatic Discharge in Semiconductor

Technological progress within the semiconductor industry brings with it greater yield sensitivity with the desire to reduce costs a constant driver. How well defects are controlled throughout an increasingly automated manufacturing process plays a critical role.

Killer Consumables: How clean are your seals?

In semiconductor manufacturing the threat of particle and especially metallic contamination to transistor integrity is a significant and potentially costly threat. This is mainly true for front end processing but, due to the high mobility of many of these contaminants, it remains a threat at all stages of the manufacturing process flow.

Low Temperature Sealing in High Pressure Applications

There are many choices in elastomer materials based on criteria such as chemical and heat resistance. Often the low temperature performance of an elastomer is overlooked or the data describing the performance may not be understood fully by the end user. Complicating elastomer material selection is the pressure of the application. High pressures are known to increase an elastomer’s glass transition temperature which decreases the low temperature sealing performance.

Purity or Plasma Resistance - Can you have both?

A study of tests carried out on different elastomer materials in aggressive chemistries and plasma conditions. Various plasma modes were employed, reflecting a variety of different process requirements. This included direct parallel plate, high density remote inductively coupled plasma (ICP) and sources specifically designed to create high radical and in particular, high fluorine radical content.

Types of Fluoroelastomer Seals for Pump Users: Explained

Aggressive pumping environments can be problematic for pump engineers. On the one hand it's impossible to design the pump to be resistant to every kind of chemical, while on the other, the tendency is to either over specify a perfluoroelastomer to cover all eventualities or select an elastomer with mid-range chemical resistance in the hope this will cover most applications. This paper investigates the latest developments in fluoroelastomer technology.

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