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Freeze and Weather Protection
Intertec
Explosion-Proof and Non-Explosion-Proof Cabinet Heater
Cabinet Heater Thermostats, Controllers, and Regulators
Nelson
Self-Regulating Heating Cables
Mueller Freeze and Weather Protection Equipment Supplier Listing
Explosion-Proof and Non-Explosion-Proof Cabinet Heater Unit
DHD, DHW, DHU, and DHR Steam Heating Tubes
DHD – Stainless steel steam heating tube for types 60-170.
DHW 100 / DHW 150 – Stainless steel steam heating tubes. DHW 100 is for types 60, 70, and 100. DHW 150 is for types 80, 150 and 170.
DHU Stainless steel steam heating tubes for all types.
DHR 55 / DHR155 aluminum-radiator with stainless steel steam-pipe. DHR 55 is for types 25 and 48. DHR 155 is for types 60 and 170.
E150 Electric Cabinet Heater
Intertec E150 electric cabinet heater is a non-explosion-proof heater for heating instrument enclosures and other enclosures not in hazardous areas that do not require complete sealing. E150 electric cabinet heaters use a reliable tubular heating element protected by a seawater-proof aluminum alloy covering.
Specifications
Adjustment range: 5-45°C
Degree of Protection: IP 20
Minitherm Self-Limiting Cabinet Heater
Intertec Minitherm explosion-proof self-limiting heaters are used in small enclosures or cabinets in hazardous areas. Explosion-proof Minitherm heaters come with a ground terminal and a different name plate identifying them as explosion-proof. Features include:
Self-limiting
Vertical or horizontal installation (minimal head output difference)
Automatic voltage adjustment
Approval: CI. 1, Div. 1, Groups A,B,C,D
Protection degree: IP68, NEMA 4X
KH Electric Cabinet Heater
Intertec manufactures both explosion-proof and non-explosion-proof KH electric heaters. KH electric heaters have been engineered to meet the heating requirements of thermally insulated housings. Features include:
IP68, NEMA 4X protection against dust and moisture
Long durable service life
Seawater-proof anodized aluminum skin
Resettable temperature limiter (explosion-proof models only)
Type of protection: EEx ed IIC T4 (explosion-proof models only)
Minitherm Self-Limiting Block Cabinet Heater
Intertec Minitherm self-limiting block cabinet heaters attach to measuring or analyzing instruments manifolds. Heat is transferred to the instruments via conduction to protect against freezing and condensation. Minitherm block heaters are explosion-proof and can be installed on equipment in hazardous areas. Features include:
Self-limiting
Compact design, small footprint
Automatic voltage adjustment conserves energy
Type of protection: CI. 1, Div. 1, Groups A,B,C,D
Protection degree: NEMA 4X / IP68
Varitherm
Intertec Varitherm electric heaters protect equipment in enclosures from freezing and condensation. Explosion-proof Varitherm heaters are approved for service in hazardous areas. Features include:
Removable fins during mounting 
Resettable temperature limiter
High heat transfer capability
Vertical or horizontal installation is possible
Type of protection: CI. 1, Div. 1, Gr. A,B,C,D and EEx ed IIC T4 / T3
Protection degree: IP68, NEMA 4X
Cabinet Heater Thermostats, Controllers, and Regulators
KR / ExEN Explosion-proof Thermostat
Intertec KR / ExEN explosion-proof thermostats maintain a constant temperature in enclosures and protective cabinets. KR / ExEN thermostats are approved for use in zone 1 and 2 hazardous areas. Features and specifications include:
Robust space-saving design
Excellent moisture protection
Nominal value: 10°C, 20°C, 30°C, 40°C. Factory set nominal values cannot be changed.
Explosion protection: EEx d IIC T6
Protection degree: IP68
PTB approval: Ex-90.C.1010
ExEN Temperature Controller
Intertec ExEN temperature controllers regulate instrument enclosures’ temperature in hazardous areas protecting instruments from condensate and freezing. Features include:
Long life solid state elements deliver reliable operation
Adjustable nominal temperature
Heater output is constantly adjusted to heat-loss to maximize heater service life
ELPR Electronic Temperature Regulator
Intertec ELPR electronic temperature regulators manage the temperature inside transmitter enclosures and protective cabinets. ELPR regulators can be used with both Intertec explosion-proof heaters and heat tracing systems. Features include:
No power supply interference
Variable sensor length
Continuously adjustable set-point
High capacity switching
PSB / HSB Self-Limiting Heat Tracing Cable
Intertec PSB / HSB self-limiting heat tracing cable protects fluids inside pipes from condensate, freezing, and solidification. PSB cable is for use in humid areas and exposure to organic chemicals. HSB cable is for use in humid areas and exposure to organic chemicals as well as periodic steam cleaning. Features include:
Simple installation even in hazardous areas
Heating circuits from 1 m length can be connected directly to the operating voltage
Pipe temperature controls power output
Self-Regulating Heating Cable
Nelson manufactures a family of self-regulating heating cables. Heating cable with different features are available to meet the requirements of wet, dirty, chemical exposure, and hazardous area applications. Nelson self-regulating heating cables are parallel circuit electric heater strips used to protect fluids in pipelines from freezing.
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How Nelson Heating Cable Works
"The parallel bus wires apply voltage along the entire length of the heater cable. The heater cable derives its self-regulating characteristic from the inherent properties of the conductive core material. As the core material temperature increases, the number of conductive paths in the core material decreases, automatically decreasing the heat output. As the temperature decreases, the number of conductive paths increases."
Nelson Heating Cable Tracing Systems
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Limitrace LT Self-Regulating Heating Cable
Maximum maintenance temperature: 150°F
Maximum intermittent exposure: 185°F
16-gauge copper bus wire
Applications include: product pipelines, fire protection, process water, dust suppression systems, hot water systems
Standard product: tinned copper metal braid (polyolefin over-jacket optional)
Appropriate for general and hazardous area applications
Limitrace Type CLT Self-Regulating Heating Cable
Maximum maintenance temperature: 150°F
Maximum intermittent exposure: 185°F
18-gauge copper bus wire
Applications include: product pipelines, fire protection, process water, dust suppression systems, hot water systems
Standard product: tinned copper metal braid (polyolefin over-jacket optional)
Appropriate for general and hazardous area applications
Limitrace Type HLT Self-Regulating Heating Cable
Maximum maintenance temperature: 250°F
Maximum intermittent exposure: 428°F
16-gauge copper bus wire
Standard product: tinned copper metal braid (fluoropolymer over-jacket optional)
Applications: Hydrocarbon and chemical pipelines
Type NC Constant Wattage Heating Cable
Maximum maintenance temperature: 150°F to 300° (depends on model)
Maximum intermittent exposure: 400°F
12-gauge copper bus wire
Standard product: tinned copper metal braid (fluoropolymer over-jacket optional)
Applications: Lube oil, condensate control, hot water, and process water
Nelex Mineral Insulated Heating Cable
Heat output to 10 times traditional heating cable
Maximum exposure temperature: 1100°F
Sheath material: alloy 825 (corrosion resistant)
Cable diameters: 0.1875 and 0.3125
Appropriate for applications requiring: high temperature exposure; high maintain temperature; stress corrosion resistance; extended heater life
Applications: floor warming systems; snow melting systems; under-heating cryogenic tanks
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