Sealing Solutions for the Railroad Tank Car Industry

The following literature provides a basic overview of the Railroad Tank Car Industry. View by turning the pages using the arrow on the right side (we recommend expanding to full-screen mode), double-click on a page to zoom in or out, or Download here.


The railroad tank car industry plays a critical role in transporting liquids and gases across vast distances efficiently and safely. Their robust design and load capacity serve a multitude of industries from food products to clay slurry, chemicals to crude oil, tank cars are a workhorse of the global economy, bringing vital products to market.

We provide high performance gaskets for rail tank car manways, components, and flanged connections for a wide range of applications in high temperature, air, water, acids, oils, steam, and various chemical environments.

Our large selection of polytetrafluoroethylene (PTFE), compressed non-asbestos (CNA), fluoroelastomer FKM, Viton®, a wide variety of elastomers and other synthetic rubber product technologies (including EPDM) are guaranteed to provide exceptional sealing properties.

Durlon rail-tank car gaskets are engineered to address the challenges related to safe railway transportation of many commodities and hazardous chemicals. From manway lids to bottom outlet valves and flange connections, Durlon provides fluid sealing solutions for numerous tank-car applications.

Non-Accident Releases, or NARs, oftentimes result in costly and potentially dangerous situations. With a focus on eliminating NARs, Durlon rail-tank car gaskets give tank-car manufactures, lessors, shippers, and repair shops the fleet-flexibility and process safety needed to combat these challenges. Reducing product loss helps increase safety and reduces possible environmental effects.

Our next level of Railroad Tank Car Manway sealing features a single “Universal Style” gasket that can accommodate several model sizes. The flexibility of the SecureSnap™ manway gasket enables the user to install the gaskets more quickly than the conventional styles. Flexible tabs easily snap into the groove bottom, eliminating the need for tight tolerances associated with conventional style gaskets. Note: Patent pending.


The Challenge:

A potential problem with a standard AAR-1 manway gasket is that the conventional design has to be precisely made with tight tolerances to fit snugly into a dovetailed groove so that it remains in place once installed. When this does not happen the potential for NARs is heightened. The required tolerances for these conventional style gaskets are difficult to achieve, and create quite a bit of scrap during the manufacturing process. In addition, if the ID is too small, installation becomes difficult if not impossible. On the other hand, if the ID is too large the gasket will easily fall out of the groove and into the manway nozzle. The result of this happening will cause leaks, splashes, and other releases from an improperly secured manway cover.

The Solution:

The increased flexibility of the SecureSnap™ manway gasket enables the user to install the gaskets more quickly than the conventional gasket. The tabs allow for the SecureSnap™ manway gasket to easily snap into the dovetail groove. Thus, the time required to install the SecureSnap™ gasket is significantly less than the time required to install a standard manway gasket.

The Benefits:


The flexibility of the SecureSnap™ manway gasket also renders the gaskets more versatile than the conventional gasket. The SecureSnap™ gasket will accommodate more than one style of manway system (dependent on end user approval) allowing distributors to simply stock one size of gasket for multiple manway designs, therefore reducing inventory and overall cost.

Download the Durlon® SecureSnap™ Technical Data Sheet here.

Below is a list of other Durlon® gasket recomendations for the Railroad Tank Car Industry: