Gallagher Fluid Seals is a Parker Distributor is proud to be proud to be one of the few premier distributors to qualify as a “Parker Seal Technology Center (STC)”.
O-rings are a universal seal throughout the world. However, some axial applications may benefit from a different sealing solution called Press-in-Place seals, or PIP seals.
First, let’s define axial seal. “Axial” implies the seal is being compressed from top to bottom. In other words, the seal is pressed between two flat surfaces. One flat surface has a groove cut into it to retain the O-ring and limit compression. This may also be called a face seal.
Gallagher Fluid Seals is a Parker Distributor is proud to be proud to be one of the few premier distributors to qualify as a “Parker Seal Technology Center (STC)”.
This is the second part of a three-part series on silicone processing options for life science applications. In part one, we discussed the chemistries of silicone. This article concentrates on the methods and processing of medical silicones.
We’ll be discussing, at a high level, three different methods: profile extrusion, which is quite common to design products; compression molding; and injection molding.
There is multi-layer extrusion, co-extrusion, and a variety of different profiles. They can range from solid profiles to hollow profiles that are symmetric to non-axisymmetric. This is a smattering of the types of extrusion that one can find and design for use in life sciences.
There are variations on this term that we use very generally as extrusion
Gallagher Fluid Seals is a Parker Distributor is proud to be proud to be one of the few premier distributors to qualify as a “Parker Seal Technology Center (STC)”.
In this three-part article series, we discuss silicone processing options for life science applications. In Part one, we explore the types of silicones, what makes it useful and safe for life sciences, and the chemistry behind it. Part two is devoted to processing. Part three delves into the interplay of design and economics of silicones. In discussing these elements, we hope to provide some thought-provoking ideas about the design and manufacture of medical-grade silicone products.
First, let's talk about the types of silicones that are best for life science applications.
Two types of silicones are frequently considered for life science applications: high consistency rubber (HCR) silicone and liquid silicone rubber (LSR).
HCR and LSR
Gallagher Fluid Seals is a Parker Distributor is proud to be proud to be one of the few premier distributors to qualify as a Parker Seal Technology Center (STC).
Parker’s ZP203 and ZP204 degradable elastomer compounds help to eliminate the need for coiled tubing intervention, or drill out, when utilized as a sealing element in the oil and gas completions market segment. ZP203 and ZP204 compounds are formulated to offer tough physical properties which are required for sealing pressures up to 10,000 psi during hydraulic fracturing operations. Once hydraulic frac is complete, the unique compound degradation is activated by the water based frac fluids to allow breakdown into flowable, nonclogging particulates, providing multiple benefits to the end user. Degradation can be on the scale of days to weeks, depending on temperature but is not greatly affected by wide range of salinities.
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team. Original content can be found on Parker’s CSS Division Website
We’ve previously discussed elastomeric o-rings numerous times in our blog. From o-ring cracking, to continuous molding technology, and even our own Definitive O-Ring Design Guide… Gallagher pretty much has you covered when it comes to elastomeric o-rings.
But what about when the process or environment is TOO extreme; even for the most advanced elastomeric o-rings? What
The world is experiencing an unprecedented confluence of supply disruptions, and low-temperature fluorocarbon rubber polymers may be the most directly impacted. Some polymer companies have announced the discontinuation of some grades, while others are severely limited in the quantity they can produce. As a result, many seal manufacturers have announced that they need to meet customer demand for these high-performance materials.
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This post is the third installment in a three-part series that describes the three main criteria for O-ring gland design: stretch, squeeze, and volume fill. These three related components must be balanced to create the ideal conditions for O-ring sealing.
The final essential criterion for O-ring design is volume fill, also called gland fill. The compressed O-ring must have extra space within the groove without overfilling the groove. Volume fill is the O-ring volume divided by the gland volume.
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.
This post is the second installment in a three-part series that describes the three main criteria for O-ring gland design: stretch, squeeze and volume fill. These three related components must be balanced to create the ideal conditions for O-ring sealing.
To form a robust seal, adequate compression or squeeze is a critical consideration. Compressing the seal energizes it, and the O-ring pushes back on the mating surfaces. This contact force between the O-ring and hardware creates a seal. Squeeze is calculated by the cross-section diameter minus the gland depth, all divided by the
Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.
This post is the first installment in a three-part series that describes the three main criteria for O-ring gland design: stretch, squeeze, and volume fill. These three related components must be balanced to create the ideal conditions for O-ring sealing.
A basic design principle often used as the starting point for O-ring grooves is stretch. One of the reasons elastomers are ideal materials for O-rings is because their elastic properties allow the O-ring to stretch around hardware and return to the original shape while within the material’s elastic deformation range.
The percent