The Hidden Cost of Gasket Failure

Gasket FailureThe importance of gaskets to the overall health of your machinery and production is often overlooked.  While gaskets represent just a fraction of the cost of the machines or systems in which they are installed, the consequences of a failure can range from nuisance leaks to catastrophic failure of a machine or process.

“Damage, downtime, lost production, along with non-compliance penalties, plus the potential for litigation and damage to the company’s reputation, make the cost of gasket failure incalculable,” Jim Drago, P.E., of Garlock Sealing Technologies wrote in a 2008 article on the subject.

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PTFE Radial Lip Seal Design

rotarydesignIn the newest installment of our series of blog posts on PTFE rotary seals, we’re going to take a closer look at PTFE radial lip seal design.

Before selecting a seal type and the filled PTFE compound to be used in a proposal, it’s important to have a thorough understanding of operating conditions and how they affect the seal performance.

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GORE Gasket Tape Series 500


GORE gasket tape

Case History #ST091 – A Chemical Processing Plant Success Story


  • Location: USA
  • Industry: Chemical Processing
  • Plant: Nitric Acid – Fertilizers
  • Application: Shell & Tube Heat Exchanger
  • Material of Construction: Zirconium
  • Temperature: 232°C / 450°F
  • Pressure: 10.3bar / 150psi Flange: Ø1651mm / 65”
  • Previous Gasket: Fiber sheet gasket (exfoliated vermiculite)

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HNBR Sealing Compounds for Energy, Oil, & Gas Service

HNBR compoundsParker’s HNBR sealing compounds provide cost-effective solutions in aggressive EOG environments.

N1173-70, N1231-80 and KB163-90 are sealing compounds made from hydrogenated nitrile, a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). The hydrogenation process gives HNBR materials enhanced thermal stability (up to 149°C/300°F, with short periods at higher temperatures).

HNBR materials also possess superior mechanical properties and enhanced fluid compatibility over standard nitrile compounds. These properties allow HNBR materials to be a  cost-effective bridging compound between nitrile and fluorocarbon elastomers.

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Download the New Freudenberg Polyurethane Materials Webinar

iStock_000013234708_SmallThere’s a new generation of polyurethane on the market, courtesy of our friends at the German company Freudenberg Sealing Technologies.

It’s called 94 AU 30000 polyurethane, and it achieves much better results than other materials on the market due to its improved characteristics. It gives seals a high resistance to even hot water and lets them last longer than other seal solutions.

Among 94 AU 30000 polyurethane’s values to customers:

  • High extrusion stability allows operating pressures up to 50 MPa/7250 psi.
  • High tear resistance boosts operating life and resistance to wear.
  • Stability in temperatures from -31 degrees F to 250 degrees F/ -35 degrees C to 120 degrees C.
  • Outstanding with mineral and biodegradable hydraulic fluids.

If you’re interested in learning more about Freudenberg polyurethane materials, and about 94 AU 30000 polyurethane, download our new webinar.

Gallagher Fluid Seals’ team worked with experts from Freudenberg to record this half hour session. We hope you’ll come away with a better understanding of this durable sealing solution.

Fillers Employed in PTFE Resins

PTFE resinIn our last few blog entries, we’ve discussed PTFE rotary seals and how they work. In this post, we’ll look at the fillers employed in PTFE resins.

In its virgin form, PTFE resin isn’t the best sealing material for dynamic shaft applications. Therefore, different fillers are added to achieve the desired results. The most common fillers are fiberglass, graphite, carbon, coke flour and molybdenum, although any filler can be added to virgin PTFE resin as long as the material can withstand maximum sintering temperature of 710-730 degrees F.

In order to develop lip seal products properly from PTFE resins, it is vital that the engineer understands the favorable and unfavorable characteristics of the resin.

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Gallagher Fluid Seals Celebrates Its 60th Anniversary!

Gallagher Fluid Seals began life in a small house in Montgomery County, Pennsylvania on Jan. 16, 1956. Back then, the business was known as The Walter B. Gallagher Company,  a mechanical packings, gaskets, and seals distributor that generated $48,000 in sales in its first year.

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Kalrez Perfluoroelastomer Parts for Pharmaceutical and Food Handling Applications

Kalrez® parts made from compounds 6221 and 6230 provide superior chemical resistance and low contamination from extractables in pharmaceutical and food handling applications where FDA compliance is required. Compounds 6221 and 6230 are especially suited for Water For Injection (WFI) systems, Steam-in-Place (SIP) cleaning and other critical systems,

Unlike other elastomeric seals made with FDA compliant elastomers, Kalrez perfluoroelastomer parts are thermally stable up to 260°C (500°F), permitting use in applications such as Stage II Sterilization processes, where other elastomers lose their sealing capabilities.

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How Do PTFE Rotary Seals Work?

How Do PTFE Rotary Seals WorkIn our last blog post, we talked about some of the benefits and uses of PTFE rotary lip seals.

But how do PTFE rotary seals work? In this post, we’ll try to answer that question in more detail.

Rotary shaft seals work by squeezing and maintaining lubricant in a slim layer between the lip and the shaft. Sealing is aided by the hydrodynamic action caused by the rotating shaft, which creates a slight pump action.

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