Sealcon stainless steel strain relief cable glands offer several benefits over other types of cable gland materials, particularly nylon plastic. Whether stainless steel is the most ideal choice depends mainly on the intended application, as it is better suited to certain environments. Other factors such as the temperature range of the environment, and the presence of corrosive substances also need to be considered.

What is a cable gland?

Cable glands, also known as strain relief fittings or cord grips, are crucial in securing cables to different types of equipment. This is especially true if the cable passes through an enclosure or control panel wall. They serve multiple purposes, such as protecting the cable from damage, keeping out dirt & moisture, and providing pull-out protection. Sealcon’s stainless steel cord grips consist of multiple components, including the outer shell, the form seal, the clamping insert, and an O-Ring. They offer high pull-out resistance while the overlapping clamping splines of the insert create an even pressure around the cable. These strain relief fittings are liquid tight to 150 PSI and are submersible up to 300 feet.

Where to use stainless steel cable glands

Stainless steel is not the only metal type of cable gland available, as nickel plated brass is also common. However, stainless steel is a harder material than brass, and can withstand higher temperatures, while not conducting heat as easily. It can also better withstand exposure to petroleum & acids. This makes them perfect for oil & gas applications, as well as renewable energy. These cable glands are also ideal for use around food & beverage, water treatment plants, and pharmaceutical applications, as the stainless steel does not promote bacteria growth. A special line of hygienic stainless steel cable glands are also available that feature a smooth surface so nothing gets built-up on them. Stainless steel is also rust resistant, making it useful for marine applications, as it can stand up to salt water. They are available in both 303 and 316L stainless steel, with 316L being the harder and more corrosion resistant of the two.

Stainless steel cable glands are offered in a range of metric, NPT, and PG sizes. The metric and PG sizes are 303 stainless steel, while the NPT fittings are made from 316L stainless steel. They can have a Buna-N (NBR) form seal with a nylon clamping insert, or a Viton form seal with a PVDF clamping insert. Viton has a higher temperature range, while the NBR rubber is less expensive.