General
Colour	Black

The Helavia DG 21E4 black is a membrane gland from the HELAVIA product group of shaped parts, manufactured from polychloroprene rubber. It serves as a protection and cable gland component for cables and conduits in installation systems, particularly in areas where a tight, mechanically robust seal is required. The gland is black in colour and is supplied in packages of 100 pieces. Its typical applications are in electrical and building technology, where it functions as a cable gland or cable clamp to safely and watertight route cables into enclosures or switch cabinets.

Membrane glands are specially designed protective components that enable an elastic, tight seal. The DG 21E4 is designed as a thick-walled membrane gland, offering higher mechanical stability and improved sealing performance compared to thinner variants. The material polychloroprene rubber (PCP) is characterised by high resistance to weathering, UV radiation, and chemical agents, making the gland suitable for use in outdoor installations as well as industrial environments. The colour black is standard and meets common requirements for discreet, robust installation components.

Functions and equipment in detail
The membrane gland DG 21E4 is installed via a screw connection into the respective enclosure or mounting opening. The elastic membrane adapts to the diameter of the cable being passed through and forms a tight seal. The construction allows for secure fastening without additional tools, with the screw connection ensuring a firm, non-sliding anchoring. The gland is designed for use in electrical and electronic installations where reliable insulation and mechanical protection are required.

Technology explained simply
The gland consists of a cylindrical housing with an integrated membrane that elastically deforms when the cable is inserted. The screw connection at the outer end ensures secure fastening in the mounting object. The polychloroprene rubber material offers high elasticity and resistance to mechanical stress, extending the gland's service life. The thick-walled design increases stability and prevents premature failure under pressure or during frequent cable insertion and removal.

Compatibility and accessories
The membrane gland DG 21E4 is designed for use in standard installation systems, particularly in switch cabinets, distribution boxes, and other enclosures requiring a screw-type cable gland. The gland can be combined with other shaped parts from the HELAVIA series to ensure a consistent protection system.

Installation and mounting
Mounting is done by simply screwing the gland into the designated opening of the enclosure. The cable is then passed through the membrane, where the elastic structure automatically adapts and creates a tight seal. The screw connection ensures a secure fastening that remains stable even under vibration or mechanical stress. No additional tools or aids are required, as the gland is designed for simple manual installation.

Advantages in operation
The DG 21E4 provides a reliable, tight seal that remains stable even under difficult environmental conditions. The material quality ensures a long service life and resistance to ageing. The thick-walled construction increases mechanical strength, which is particularly beneficial in industrial applications. The gland is easy to install and requires no special tools, reducing installation time. The colour black blends visually into most installation systems and is therefore unobtrusive in use.

The packaging contains 100 pieces, suitable for larger projects or series installations. The weight per piece is 8.94 g, with the total package weighing 0.894 kg. These values are taken from the manufacturer's product page and correspond to the specified data.