Durlon® SecureSnap™

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.

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 stock one size of gasket for multiple manway designs, therefore reducing inventory and overall cost.

Industries Rail Tank Car

Durlon® SecureSnap™ is used exclusively in the railroad tankcar industry. It has been tested and approved for liquid chlorine, caustics, gaseous oxygen, and high purity applications in the pharmaceutical industry and is designed for applications where resistance to highly aggressive chemicals is required.

Durlon® SecureSnap™ has been proven through the "Test Protocol" of the Chlorine Institute and is listed as an acceptable gasket material for Dry Chlorine service (both liquid and gaseous) in Pamphlet 95, Edition 3 of the Chlorine Institute. Additionally, Durlon® SecureSnap™ was independently tested and approved for Caustics service by a major chemical/chlorine manufacturer. Unlike generic glass fiber filled PTFE gaskets, the shape of the fillers used in Durlon® SecureSnap™ do not allow wicking which can cause corrosion on flange faces.

Durlon® SecureSnap™ has been independently tested and certified (BAM) for oxygen service at pressures up to 585 psi (40 bar) and temperatures up to 392°F (200ºC), and for service in gaseous oxygen. Gaskets for gaseous oxygen service can be supplied from distributor stocks, providing proper cleaning procedures for gaseous oxygen service are followed before installation.

Passed API 6FA Fire Test: A bolted 6” Class 300 test fixture with Durlon® 9000 was subjected to an external flame for 30 minutes followed by a 10 minute cool down during which the flame temperature averaged 875°C (1607°F) with the test fixture at or above 650°C (1202°F) for 19.8 minutes. This was followed by a 5 minute post-burn test, and then a 5 minute operational test with the system depressurized then repressurized (547 psig avg.). Leakage during each test phase was significantly below the test allowables.