CMP SS2K Double Seal Explosive Atmosphere Cable Gland

A double-seal cable gland for unarmoured and braided cables in hazardous areas

The CMP SS2K is a double-seal, globally approved explosive atmosphere cable gland for all types of unarmoured and braided cables. CMP describes it as providing a double seal on the outer sheath, or a single seal on the outer sheath and inner bedding, with a displacement-type flameproof seal and superior cable retention. It is deluge protected to DTS01:91, suits direct and remote installation, operates from -60 to +130 degC as standard, and an Ex e only version is available.

It is marked UKEX, IECEx, ATEX and CSA, and is offered in brass, nickel plated brass, stainless steel and aluminium, so it can be matched to offshore, coastal and chemical environments.

Technical specifications

Size selection (metric)

Values are from the CMP datasheet TDS501 Rev 17 (03/22). Ordering reference: size, SS2K, 1RA and a material suffix, with brass needing none, nickel plated brass 5, 316 stainless steel 4 and copper-free aluminium 1; NPT options add a thread code. Example: 25SS2K1RA432 is a stainless steel 3/4 inch NPT gland.

What to confirm before ordering

Confirm the cable type (unarmoured or braided), the bedding and overall diameters, entry thread, gland material for the environment, the gas or dust group and the certificate required. For armoured cable consider the CMP PX2K, and the CMP T3CDS is another CMP gland on the site. More products are listed under cable accessories.

How the CMP SS2K cable gland works

The gland holds the cable where it enters a hazardous-area enclosure and seals the entry. A flameproof seal of the displacement type is squeezed around the cable, so a flame or hot gas inside the enclosure cannot travel out along the cable. For unarmoured and braided cables the gland can seal the outer sheath twice, or the outer sheath and the inner bedding, which keeps moisture out as well. The body holds the cable firmly, so a pull on the cable does not load the terminals inside.

Where the SS2K is used

• Offshore platforms and marine installations
• Oil, gas and chemical plants
• Junction boxes and motor terminal boxes in Zone 1 and Zone 2
• Dusty areas, with the Ex ta rating for dust
• Locations exposed to deluge water

Selection checklist for the SS2K

• Cable type: unarmoured or braided
• Cable outer diameter and bedding diameter, against the size table
• Entry thread, such as M20 or M25
• Material: brass, nickel plated brass, stainless steel 316 or aluminium
• Marking needed for the area: ATEX, IECEx, UKEX or CSA
• Ex d, Ex e or Ex n protection in the enclosure
• Ingress protection of IP66, IP67 or IP68
• Temperature range of -60 to +130 degrees C

Installation, commissioning and maintenance notes

Prepare the cable to the length given in the instructions and fit the gland parts in the right order. Tighten the seal until the cable cannot be pulled or turned. Fit the gland into the enclosure entry and use a washer or a sealing ring where the datasheet calls for it. Do not use sealant on the threads unless the certificate allows it. Check the gland for tightness and for damage to the seal during inspections.

Requesting a quotation for the CMP SS2K

Please send the cable type and diameters, the thread, the material and the area marking needed. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

SS2K certificates

The datasheet lists ATEX, IECEx, UKEX and CSA certificates, with the numbers printed in the certificate table.

SS2K ingress and impact

The gland is rated IP66, IP67 and IP68. Impact level 8 and cable anchorage type B apply.

SS2K marine approvals

Marine approvals listed are LRS, DNV, ABS and BV.

SS2K sizes

The 20S16 fits cables of 3.2 to 8.6 mm and the 25M fits cables of 11.1 to 20.0 mm. The 32M fits cables of 17.0 to 26.3 mm.

Cable gland records for SS2K

Keep the certificate numbers and the size of each gland with the hazardous area file.

Documents and quotation

The attached CMP datasheet covers the classification, approvals and size table. Send the size, material, thread and quantity with your enquiry.