Eliminate the risk of catastrophic leaks

In-process leaks under vacuum or under pressure can be costly in terms of lost time, materials and finished product. Under certain circumstances, they can also be extremely dangerous.

When customers asked us for a solution that would eliminate the risk of in-process leaks caused by sheath failures, Conax devised the idea for a Combo Fitting that has a seal for the thermocouple sheath and a secondary seal for the wires. The dual seals ensure that, if the sheath breaks or wears out, there will still be no leak into or out of the process.

Vacuum leaks

Conax Combo Fittings are ideal for processes that take many days to complete, utilize expensive raw materials, or when it would be especially costly to lose the finished product due to a vacuum leak into the process.

For example, a solar manufacturer with a 20-day poly-crystalline ingot growth cycle experienced a leak into the chamber during a cycle, ruining the ingot and costing the customer time and money. Now, our Combo Fittings eliminate the risk for potential loss in the future.

Pressure leaks

Leaks out of the process chamber can be even more serious for processes that contain deadly or explosive chemicals.

For example, a Conax customer was running a process to dispose of old chemical weapons. During this process, the bomb would be sealed in a chamber and detonated. Then, the atmospheric temperature inside the chamber would be raised to destroy the chemical contaminates. They came to Conax for a solution that would ensure no lethal gas would leak from the chamber during the disposal process.

Customized Combo Fittings

Conax routinely creates fittings using a combination of our PG and MTG fittings. However, we can customize a Combo Fitting to your unique needs using any two Conax fittings.

Talk to us today to find out if a Conax Combo Fitting is right for your process.

Progressive Description Example

Example: PG2S-093-A-T

Conax Technologies offers three models of split fittings (glands) designed to facilitate assembly and sealant replacement when the diameter of the probe tip is larger than the diameter of the element(s) at the location of the seal. Split fittings provide split sealants, followers and seats to facilitate easy sealant change without removing the element(s) from the system.

Features:
* Seals 1 Element
* For Gas or Liquid
* Stainless Steel Fitting
* Simple Assembly – Insert Element, Torque Cap
* Replaceable Sealant Permits Repeated Use Of Fitting
* Field Adjustable
* Tube Stress Concentration Minimized
* Temperature Range From -400°F to +1600°F (-185°C to +870°C)
* Pressure*: Vacuum to 10,000 PSI (690 bar)

Application Ideas:
Sealing of analyzer sampling probes with blow-out collars; allows probe change out with removal of fitting body.
Gas filled capillary bulb temperatue sensors (PartLow style).
Cable assemblies with factory installed connectors (vibration sensors).
Sealing of a simple long length conductor, simplifying assembly, disassembly and change out of sealant.

Replacement Sealant (RS) consisting of sealant only is also available:
Examples: RS-PG2S-093-T, RS-PG4S-250-V, RS-PG5S-500-L

Example: TG-24M(K)-A2-T, 24P/36

TG assemblies with high-temperature fiberglass-insulated thermocouple wire are specially designed for applications where the sensor wire is exposed to process temperatures reaching up to 1400°F (760°C). This assembly is particularly targeted for use with vacuum and/or inert gas back-filled furnaces with vessel wall temperatures up to 200°F (93.3°C) and pressures not exceeding 300 psi.

The assembly consists of magnesia alumina silicate vitreous fiber braided impregnated thermocouple grade wires on the body side, with stripped bare wires passing through the Conax-manufactured TG Feedthrough. Sleeved insulation material on the wires exiting the cap side may be fiberglass/silicone impregnated or polyolefin.

Gland bodies, caps and followers are constructed from 303SST. Cap Style A offers a mounting thread only. Cap Style B provides threading on both ends for attachment to conduit or terminal heads. These assemblies are offered with Viton sealants. Alternative sealants are available. Please consult a Conax Technologies sales engineer for custom needs.

Conax Technologies’ HL Feedthrough is designed for sealing protection in a wide variety of hazardous environments.

The HL Feedthrough has been CSA ³ certified in the U.S. and Canada for use in hazardous locations defined by the NEC ² as Class I, Div.1 and 2, Groups B, C, and D; Class II, Div. 1 and 2, Groups E, F, and G; and Class III.

The HL Feedthrough is superior to Chico ⁴ and other similar conduit sealing compound fittings commonly used in hazardous environments.

With a mechanically-sealed Conax HL Gland, you will not have to be concerned about cracks in compound sealants or incorrectly installed compound sealant that allow gases or liquids to leak in the conduit system, migration of explosive gases through stranded conductors due to a pressure differential in the conduit system.

Features:
* CSA ³ certified in the U.S. and Canada
* Pressure rated to 500 PSIg
* Suitable for gas or liquid
* Features Grafoil ¹ sealant
* Sleeves are used to protect wires from damage
* Two body styles – small (1/2″ NPT) and large (3/4″ NPT)
* Body and cap material is 303 SST
* Wire, solid 14, 16 or 18 AWG is supplied either by customer or Conax Technologies
* Minimum 18″ leads on both ends
* Wires can be easily assembled in the field

*Temperature range from -4°F to 130°F (-20°C to + 55°C)

¹ Grafoil® is registered trademark of UCAR Carbon Company.
² NEC® is a registered trademark of National Electrical Code.
³ CSA® is a registered trademark of Canadian Standards Association.
⁴ Chico® is a registered trademark of Cooper Crouse-Hinds.

High Density (HD) assemblies consist of a stainless steel tube swaged over 12, 24, 40 or 60 bundled PTFE coated thermocouple grade and/or copper wires, providing a continuous wire feedthrough for thermocouples, RTDs or low voltage instrumentation. No epoxy or potting is used in the construction. The assembly can be furnished with or without junctions and comes standard with 24 inches of leadwire on each end. Longer wire lengths can be supplied as required. A single high density feedthrough can pass through a Conax PG Fitting for environmental sealing. Greater density through a single port can be achieved by using a Conax MHM Fitting that accommodates multiple HD assemblies.

HD18 – 0.187″ diameter, 12 conductors
HD25 – 0.250″ diameter, 24 conductors
HD31 – 0.312″ diameter, 40 conductors
HD37 – 0.375″ diameter, 60 conductors

* Sheath Material: 300 Series SST, 4.5″ nominal length
* Temperature Range: -112°F to +250°F (-80°C to +120°C)
* Vacuum Rating: 5 x 10-6 mm HG @ 68°F (20°C)
* Leak Rate: 1 x 10-9 scc/sec He @ 68°F (20°C), 1 atm. applied
* Voltage Rating: 100 VDC
* Amperage Rating: 500mA
* Feedthrough Pressure Rating @ 68°F (20°C): 5000 psi (345 bar)

BEARING WIRE SEALS (BSWS)

Example: BSWS4-20-A3-V

Continuous Wire Feedthrough for Embedded Bearing Temperature Sensors while sealing securely to prevent oil wicking along the leads.

Conax Technologies BEARING SENSOR WIRE SEAL efficiently seals directly on the individual insulated leads of an embedded bearing temperature sensor exiting an oil-filled bearing housing.

Typical applications include the sealing of these leads on large motors, generators, turbines, pumps, compressors and journal bearing pedestals.

Features:
* Stainless Steel Fitting
* For Bearing Oil Sealing
* Easy Installation – No “Potting”
* Seals 2 to 14 Wires
* Pressure: to 50 PSI (3.4 bar)
* Temperature Range: Ambient to 100°F (37.8°C)
* Field Adjustable
* Reusable Fitting

Transducer Wire Seals (TWS)

This version of the Conax sensor wire seal is designed to seal transducer cables entering low-pressure oil-filled cavities in rotating equipment. Since these transducers are typically manufactured with a factory assembled sensor and connector, the fitting has split internals to seal the outside jacket of the transducer’s cable.

The Transducer Wire Seal (TWS) comes standard with a four hole split Viton sealant and with four split PTFE backing disks. The backing disks will have 1, 2, or 3 holes so one sealing fitting can seal up to three
vibration, proximity and pressure transducer sensor cables.

Unlike competitors’ designs, the Conax design requires only one PTFE backing disk and does not require the end user to punch out the holes.

Call Conax today to learn more about complete line of sensor wire seals – and how we can customize a solution for your application.

Conax Technologies manufactures high pressure seals up to 30,000 PSIg at 68° F (20° C) for instrument signal wires. High pressure seals are designed for installation onto the pressure vessel wall using threaded mounting configurations only. High pressure assemblies are factory torqued, so disassembly and reassembly in the field is not recommended.

These assemblies feature body and caps constructed from high strength 316SST and a proprietary sealant. HPPL assemblies are provided with Kapton-insulated 26 gauge solid copper wire. Standard assemblies include 24″ of wire on each side. To order other wire lengths, indicate the desired lengths after the catalog number.
A 1/2″ NPT thread can be added to the assembly cap to allow mounting a terminal box or other type of enclosure. Consult factory for ordering details.

For other types of high pressure applications such as electrode sealing, please consult the factory.

Example: TG-24F(J)-A2-T, 4P/36,  TG-20F,  TG-24F

TG assemblies with fiberglass-insulated thermocouple wire are specially designed for applications where the sensor wire is exposed to process temperatures reaching up to 900°F (482°C). This assembly is particularly targeted for use with vacuum and/or inert gas back-filled furnaces with vessel wall temperatures up to 200°F (93.3°C) and pressures not exceeding 300 psi.

The assembly consists of bonded fiberglass-insulated/silicone impregnated thermocouple grade wires on the body side, with stripped bare wires passing through the Conax-manufactured transducer gland. An alternative high-temperature fiberglass for Type K wire is also available with temperature capabilities up to 1400°F (760°C), see TGM. Sleeved insulation material on the wires exiting the cap side may be fiberglass/silicone impregnated or polyolefin.

Feedthrough bodies, caps and followers are constructed from 303SST. Cap Style A offers a mounting thread only. Cap Style B provides threading on both ends for attachment to conduit or terminal heads. These assemblies are offered with Viton sealants. Alternative sealants are available. Please consult a Conax Technologies sales engineer for custom needs.

Sample Probe Assemblies (SPAs)

Conax Technologies’ Sample Probe Assemblies (SPA) are used to insert and retract an analyzer sample probe or injection quill into a pressurized process through a process isolation valve. Conax SPAs are designed for unique applications, including:

• Process analysis
• Flare stack emissions
• Chemical injection quills
• Waste water analysis
• Potable water quality sampling
• Hot tapping liquid or gas streams

Conax features

• Plasma welded stop collar
• Retaining Chain Kit
• Wake frequency calculations through our online Wake Frequency Solution Builder™
• Various probe ends and valve types available

Material options

• Optional materials for the Sample Probe Assembly and the Conax Compression Seal Fitting (PG) body (wetted components) are available. Available options include 316L SST, 316 NACE SST, 316L CRN, Monel 405, Hastelloy C276, Inconel 600 and others.
• Sample Probe Assemblies and/or PG fitting bodies can be supplied with a Silcolloy™ 1000 (Silcosteel^®-CR) or SilcoNert™ 2000 (Siltek^®/Sulfinert^®)coating.
• Standard Sealants are PTFE and Grafoil^®. Other sealants are available for special applications.

Ensure your SPA meets ASME and IEC standards

Conax Technologies’ SPA Quote Request form is available to identify the full range of process conditions Conax requires to develop a design solution. Please complete this form and email it to SPA@conaxtechnologies.com. If you need engineering help to ensure you’re choosing the proper Sample Probe Assembly (SPA) for a specific application, we’ve created the Wake Frequency Solution Builder^™ to generate immediate, online wake frequency calculations. This tool enables you to enter data for the specific SPA you need and receive immediate calculation results, based on ASME PTC 19.3 TW-2010 and/or IEC/TR 61831 standards. If there are problems with the configuration of your SPA, you’ll see exactly what needs to be adjusted. If the design is approved, you’ll see confirmation that each element tested has passed, and you can contact us to purchase the SPA.