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CMP PXSS2K Double Seal Barrier Cable Gland for Unarmoured Cable

Description

A double-seal barrier gland for unarmoured cable

The CMP PXSS2K is a double seal, globally approved explosive atmosphere barrier cable gland for unarmoured and braided cables. The inner compound barrier seals around the cores after the inner sheath or bedding is removed, a displacement type environmental seal grips the outer sheath, and the datasheet describes superior cable retention and deluge protection. The gland can be installed directly in the equipment or remotely.

It is the CMP barrier choice for cables without armour that enter Ex d flameproof enclosures, Ex e terminal boxes and Ex n equipment, and for installations in hose-down or wet locations. The datasheet lists IP66, IP67 and IP68 (IP68 tested to 30 m for 12 hours), NEMA Type 4X and an operating range of -60 to +85 C.

Technical specifications

Parameter Specification
Manufacturer / series CMP Products, PXSS2K (TDS555 REV20)
Application Double seal barrier gland for unarmoured and braided cables
Cable type Unarmoured (where the cable is permitted by NEC and/or CEC)
Sealing technique Inner compound barrier and outer sheath displacement seal
ATEX / IECEx / UKEX CML18ATEX1325X, CML18ATEX4317X; IECEx CML 18.0182X; CML 21UKEX1214X, CML 21UKEX4215X
Code of protection II 2G 1D Ex db IIC Gb, Ex eb IIC Gb, Ex ta IIIC Da; II 3G Ex nR IIC Gc; I M2 Ex db I Mb, Ex eb I Mb (mining, not aluminium)
North America cCSAus certificate 2288626; cULus E201187-19990430, E161256-19990429; UL E253914-20050328; Type 4X
Design specification BS 6121 Part 1:1989, IEC 62444, EN 62444
Mechanical classification Impact level 8, cable anchorage type B; IK10 (brass and stainless steel only)
Ingress protection IP66, IP67 and IP68; NEMA 4X; deluge DTS01:91
Operating temperature -60 to +85 C
Materials Brass, electroless nickel plated brass, stainless steel, aluminium
Seal material CMP SOLO LSF halogen-free thermoset elastomer / epoxy barrier compound
Size range 20S16 to 100 (M20 to M100, or 1/2 in to 4 in NPT)

Selected sizes from the datasheet selection table (metric thread, brass):

Size Entry thread Overall cable dia. (mm) Max. cores Max. dia. over conductors (mm) Across flats (mm) Length F (mm) Weight (kg)
20S16 M20 3.1-8.6 21 8.6 30.0 53.1 0.20
20 M20 6.5-14.0 21 12.6 30.0 54.2 0.20
25 M25 11.1-20.0 30 17.5 36.0 60.0 0.33
32 M32 17.0-26.3 38 23.6 41.0 61.1 0.59
50 M50 35.6-44.0 115 41.0 60.0 67.6 0.73
100 M100 76.0-90.9 200 83.6 123.0 86.3 4.00

Ordering reference and when to choose it

Order by size code and type, for example 20PXSS2K1RA5 for nickel plated brass M20 or 25PXSS2K1RA432 for a 316 stainless steel 3/4 in NPT gland. Material suffixes added to the ordering reference: brass (no suffix), nickel plated brass 5, 316 stainless steel 4, copper-free aluminium 1; NPT options add digits to the material suffix (for example 1/2 in = 31, 3/4 in = 32, 1 in = 33). The size is selected from the overall cable diameter, with the number of cores and the diameter over conductors checked against the table.

Choose the PXSS2K when the cable has no armour but the installation needs a flameproof barrier. For armoured cable CMP lists the PX2K, PX2KW and PX2KX families, and for non-barrier Ex e use there are further CMP glands. The stainless steel option is common offshore and in coastal plants where corrosion resistance matters, and the datasheet lists the marine approvals (LRS, DNV, ABS, BV).

Installation and compliance notes

Barrier glands require the epoxy compound to be installed according to the manufacturer’s instructions, which also lets the gland be installed remotely from the equipment. The datasheet states that the mechanical and electrical classifications are applied as per IEC 62444 and EN 62444, and that IP and NEMA ratings apply when CMP installation accessories are used. Aluminium alloys are not permitted in Group I mining applications. Confirm the gland marking against the equipment certificate and the area classification.

Documents and quotation

The attached CMP PXSS2K datasheet carries the full selection table for sizes 20S16 to 100 and the certification block with every certificate number. When requesting a price, tell us the size code, entry thread (metric or NPT), material, cable type and construction, hazardous area classification and quantity, and whether shrouds or other accessories are needed. See also Electrical Tapes and Cable Accessories and the CMP PX2K explosive atmosphere barrier cable gland for armoured cable.

Datasheets & Documents
  • PDF Datasheet CMP PXSS2K cable gland datasheet (TDS555) Download
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About brand

CMP Products makes cable glands and cable cleats, and little else. Founded in 1957 and based in Cramlington, United Kingdom, the company is a name that appears on hazardous-area cable schedules for oil, gas and power projects. Seven Star LLC sources and supplies CMP cable glands for explosive atmospheres to contractors in Oman, including the E1FW and the Triton T3CDS, among other glands and cable cleats listed on this page.

CMP cable glands listed here

The T3CDS Triton is a gland for armored cables with a compensating displacement seal, a design that sets the inner seal correctly across the cable diameter range, and an integral deluge seal. CMP lists it as Ex db, Ex eb, Ex nR and Ex ta, with IP66, IP67 and IP68 ratings. The E1FW is the explosive atmosphere gland for steel wire armored (SWA) and aluminum wire armored (AWA) cable.

Ordering CMP glands: what we need

A gland is sized to the cable, so send the cable type and three dimensions: inner bedding diameter, outer sheath diameter and armor wire size. Add the entry thread and size (metric or NPT), the gland material (brass, nickel-plated brass or stainless steel) and accessories such as locknut, earth tag, sealing washer and shroud. GCC project specifications usually name the certificate required.

Frequently Asked Questions

What cable is the PXSS2K for?
Unarmoured cable (and braided types as printed on the datasheet) where permitted by the applicable code.
Is it a barrier gland?
Yes. It has an inner compound barrier and an outer sheath displacement seal.
What is the temperature range?
-60 to +85 C.
What protection codes are marked?
Ex db IIC Gb, Ex eb IIC Gb, Ex nR IIC Gc and Ex ta IIIC Da, plus Group I Ex db and Ex eb as printed.
Which materials are offered?
Brass, nickel plated brass, 316 stainless steel and copper-free aluminium.