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Conax Sealing Glands

Thermal Detection Ltd is the UK distributor for Conax Technologies Sealing Glands, Feedthroughs and Fittings. Thermal Detection has a 20 year history of representing Conax Technologies and we can help you choose the right gland for your application. Contact us today for assistance.

Conax Technologies Sealing Glands are based on soft-sealant technology whereby the plastic deformation of a sealant material within a fixed housing forms a high integrity seal. The standard sealant materials in use are Neoprene, Teflon, Viton, Lava and Grafoil which give different sealing capabilities across a wide range of temperatures, pressures and environments.

The glands are designed to enable easy installation, adjustment and replacement of elements. The soft sealant technology also allows repeated use of the gland simply by replacing just the sealant itself.

By carefully selecting gland type, body material, sealant material and process connection (i.e threaded, welded, flanged) it is possible to meet the requirements of many applications across all industries, and enable the sealing of pressures from full vacuum up to 670 bar (10,000 psi) and temperature ranges of -240°C to +1650°C (-400°F to +3000°F).

Standard Sealant Properties:

Sealant
Type
Temperature
Range
Vacuum
Rating
Electrical
Resistivity
Impermeability
to Gas
Material
Features
Neoprene
(Chloroprene)
-40°C to 93°C 0.005 microns GOOD GOOD Has resilience of natural rubber, with better resistance to oil, gasoline, ozone, weather and heat. Excellent memory for temperature cycling applications, moderate electrical resistivity, reusable in most cases.






Viton®
(Fluorinated Hydrocarbon)
-20°C to +232°C 0.005 nicrons GOOD EXCELLENT Retains mechanical properties at high temperature. Resistant to oils, solvents, fuels, corrosive industrial chemicals. Good electrical properties, reusable in most cases.






Teflon®
(PTFE)
-185°C to +232°C 0.005 microns EXCELLENT GOOD Most versitile elastomer material, near inert to almost all industrial chemicals and solvents.






Lava
(MgO.Al2O3.SiO2)
-185°C to +870°C Not recommended for vacuum GOOD POOR Excellent in high temperature, crushes to powdered mass under compression, porous to light gases and steam. NOT RECOMMENDED FOR HIGH VACUUM. Not reusable






Grafoil®
(Graphite in foil layers)
-240°C to +495°C
to +1650°C in non oxidising atmosphere
0.005 microns POOR EXCELLENT Low vapour pressure, low gas permeability excellent for vacuum applications. Natural lubricity, electrically conductive. Superior sealing capabilities at +495°C. Not reusable in most cases.

The main gland types are below, with links to product pages:

PG: For a single element (e.g temperature probe) in range of imperial and metric sizes. 

MHC: For sealing multiple elements through a single gland.

MHM: For sealing multiple elements with different diameters through a single gland.

Split Glands: Internal components are split to allow wrap around of element.

EG/EGT: For single electrodes. EGT for use up to 8KV / 525A.

PL: For insulated power leads to for example, autoclaves, transformers, motors and heaters.

TG: For sealing multiple bare wires, e.g bare wire thermocouples, strain gauges, and thermistors.

BSWS: For bearing sensor wires, to prevent oil migrating along the leads.

HD: A high-density, swaged wire feedthrough mounted in a sealing gland. For thermocouples, RTDs in validation mapping of autoclaves, pharmaceutical freeze dryer or lyophilizer.

RSC: Replacement sealants can be purchased to allow gland body re-use. For PG, MHC, MHM, PL, TG, Split Glands.

RPS: Replacement packing sets include all the replaceable inner parts for MHC, MHM, PL, TG, Split glands.

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