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Results
You searched for: TPI Corp/Markel HLA Series Hazardous Location Fan Forced Unit Heater
Results Displayed: 1 - 36 of 36
Shown with optional pilot light
and disconnect switch. FAN-FORCED SUSPENDED UNIT HEATERS 3-25 KW FOR CLASS I, GROUP C & D, DIVISION 1 & 2 AND CLASS II, GROUPS E, F & G, DIVISIONS 1 & 2.



• Designed for rugged industrial applications in hazardous locations where the possibility of explosion or fire exists due to the presence of certain flammable gases, vapors, powdered metals or dust.


• Permanently sealed, liquid to air, finned tube heat exchanger core.


• Ethylene Glycol to water mixture used as a heat transfer fluid in the heater core, providing -45° C. (-49° F) freeze damage protection.

• High-performance electric motor driven fan blows air across finned tubes to effect uniform heat transfer and area heat distribution.


• Manual Reset capillary type limit provides high temperature regulation and is rated for 6,000 cycles of service.


• Stainless steel and aluminum pressure relief valve for overpressure.


• A back-up contactor is included for additional protection.


• 14 Gauge steel cabinet powder coated epoxy paint finish contains heater core, motor, and fan assembly.


• Narrow gap safety fan guard shields all moving parts.


• Adjustable louvers allow directional control of air.


• Copper conductor wires enclosed in rigid metal conduits carry all electrical power.


• Manufactured in U. S. A.


• Box lugs furnished for field connections within approved enclosure.



Product Specifications


Heat Exchanger and Elements:


Heavy walled, painted carbon steel with aluminum fins liquid heat exchanger, liquid filled with three-immersion type copper sheathed elements. The elements shall have the highest quality nickel-chromium resistance wire encased in a magnesium oxide dielectric and be hermetically sealed into the heat exchanger core. The heat transfer fluid is Ethylene-glycol solution for operation to -49 degrees F (– 45 degrees C). Stainless steel and aluminum pressure relief valve for overpressure.


Thermal Cutout High Limit Protection and Optional Pilot Light:


The capillary type manual reset thermal cutout shall be rated for 6000 cycles of service and mounted in the liquid filled heat exchanger. An optional pilot light to indicate manual reset tripped, if safe operating temperatures are exceeded, is located on control enclosure.


Motor:


The motor shall be a permanent split capacitor type, permanently lubricated, ball bearing type. The motor shall be rated for hazardous location and operate at rated voltage of heater, 60 Hz, 1725 RPM.


Control Enclosure:


All controls shall be factory installed and wired in a hazardous location enclosure. Contactors and back-up contactors are heavy duty type and break all ungrounded conductors and be rated for 100,000 cycles at full load. Standard 24-Volt control circuit shall be supplied by internal class II transformer. An optional factory wired integral thermostat or standard terminal block for field wiring to optional remote wall thermostat are wired in control panel. No fan delay relay.


Disconnect Switch:


Factory mounted and wired hazardous location disconnect switch is available as optional accessory.


Cabinet With Adjustable Louvers:


The Cabinet shall be 14 Gauge, cold rolled steel with powder coated epoxy finish. Plated fan guards with less than 1/4 inch spacing to cover motor and fan shall conform to OSHA Requirements.


Note:


Before selecting a hazardous location electric heater refer to Article 500 or other applicable standard referenced in the National Electric Code.



CLASS I: Equipment does not have surface operating temperature in excess of the ignition temperature of the specific gas or vapor.

Application Examples:

• Offshore and land based drilling rigs, petroleum exploration and testing facilities.

• Petroleum refineries, gasoline storage and dispensing areas.

• Industrial firms that use flammable liquids in dip tanks for parts cleaning or other operations.

• Petrochemical companies that manufacture chemicals from gas or oil.

• Dry cleaning facilities where vapors from cleaning fluids may be present.

• Aircraft hangers and fuel servicing areas.

• Utility gas plants and operations involving storage and handling of liquefied petroleum or natural gas.


GROUP C: Atmospheres such as but not limited to acetaldehyde, allyl alcohol, hydrogen sulfide, ethylene, carbon monoxide, or

other gases or vapors of equivalent hazard.


GROUP D: Atmospheres such as but not limited to acetone, alcohol, gasoline, lacquer solvent vapors, natural gas, propane or

other gases or vapors of equivalent hazard.


CLASS II: Equipment does not have surface temperature greater than the ignition temperature of the specified dust.

Application Examples:

• Coal preparation plants and other carbon handling or processing areas.

• Grain elevators, flour and feed mills.

• Plants which manufacture, use or store Magnesium or Aluminum powders.

• Plants that have chemical or metallurgical processes.

• Producers of starch products or candy.

• Spice grinding plants, sugar plants and cocoa plants.


GROUP E: Atmosphere containing combustible metal dust regardless of resistivity, or other combustible dust of similar hazard

characteristics having resistivity of less than 105 OHM - Centimeter.


GROUP F: Atmosphere containing carbon black, charcoal, coal or coke dust.


GROUP G: Atmospheres containing combustible dust having resistivity of 105 OHM-Centimeter or greater.


DIVISION I: A location in which ignitable concentrations of flammable material exist under normal operating conditions.


DIVISION II: Locations in which flammable materials will normally be confined within closed containers and escape only in the

case of accidental rupture, breakdown or during maintenance operations. Any equipment approved for Division I is automatically

also approved for Division II.













Item CodeDescriptionVendorQuantity
MARKEL734318
/contentonly.aspx?file=images/items/MARKEL734318_s.* does not exist
HLHM Hanging Mounting Kit
TPI Corp./Markel Requires customer supplied 1/2 Inch Pipe, cut and threaded (not supplied)
Tpi (Fostoria/Markel)
MARKEL734325
/contentonly.aspx?file=images/items/MARKEL734325_s.* does not exist
HLWM37 Wall Mounting Bracket
TPI Corp./Markel use with Heaters 3.0 KW - 7.5KW, weight 27lbs
Tpi (Fostoria/Markel)
MARKEL734349
/contentonly.aspx?file=images/items/MARKEL734349_s.* does not exist
HLWM1525 Wall Mounting Kit 15kW25kW
TPI Corp./Markel - for use with 15.0 kW - 25.0 kW HLA Series Hazardous Location Fan Forced Unit Heater
Tpi (Fostoria/Markel)
MARKEL734288
/contentonly.aspx?file=images/items/MARKEL734288_s.* does not exist
HLPM37 3 to 7.5KW Pipe Mt Kit for HLA
TPI Corp./Markel HLA Series Hazardous Location Fan Forced Unit Heater Accessory - 3-7.5 kW - Pipe Mt Kit for HLA
Tpi (Fostoria/Markel)
MARKEL734295
/contentonly.aspx?file=images/items/MARKEL734295_s.* does not exist
HLPM10 10KW Pipe Mt Kit for HLA
TPI Corp./Markel HLA Series Hazardous Location Fan Forced Unit Heater Accessory - 10 kW - Pipe Mt Kit for HLA
Tpi (Fostoria/Markel)
MARKEL734301
/contentonly.aspx?file=images/items/MARKEL734301_s.* does not exist
HLPM1525 15 to 24KW Pipe Mt Kit for HLA
TPI Corp./Markel HLA Series Hazardous Location Fan Forced Unit Heater Accessory - 15-24 kW - Pipe Mt Kit for HLA
Tpi (Fostoria/Markel)
MARKEL734004
HLA122083603.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 3 Phase - 3 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734011
HLA122401603.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 1 Phase - 3 KW - 17.75 Inch H x 22.375 Inch W x 20.625 Inch D
Tpi (Fostoria/Markel)
MARKEL734028
HLA122403603.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 3 Phase - 3 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734035
HLA124803603.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 3 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734042
HLA126003603.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 3 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734356
HLA122081603.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 1 Phase - 3 KW - 17.75 Inch H x 22.375 Inch W x 20.625 Inch D
Tpi (Fostoria/Markel)
MARKEL734059
HLA122083605.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 3 Phase - 5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734066
HLA12240160524 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 1 Phase - 5 KW - 17.75 Inch H x 22.375 Inch W x 20.625 Inch D
Tpi (Fostoria/Markel)
MARKEL734073
HLA122403605.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 3 Phase - 5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734080
HLA124803605.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734097
HLA126003605.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734363
HLA122081605.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 1 Phase - 5 KW - 17.75 Inch H x 22.375 Inch W x 20.625 Inch D
Tpi (Fostoria/Markel)
MARKEL734103
HLA122083607.524 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 3 Phase - 7.5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734110
HLA122401607.524 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 1 Phase - 7.5 KW - 17.75 Inch H x 22.375 Inch W x 20.625 Inch D
Tpi (Fostoria/Markel)
MARKEL734127
HLA122403607.524 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 3 Phase - 7.5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734134
HLA124803607.524 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 7.5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734141
HLA126003607.524 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 7.5 KW - 17.75 Inch H x 22.375 Inch W x 19.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734158
HLA1620836010.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 3 Phase - 10 KW - 20.75 Inch H x 26.375 Inch W x 20.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734165
HLA1624016010.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 1 Phase - 10 KW - 20.75 Inch H x 26.375 Inch W x 21.625 Inch D
Tpi (Fostoria/Markel)
MARKEL734172
HLA1624036010.024T Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 3 Phase - 10 KW - 20.75 Inch H x 26.375 Inch W x 20.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734189
HLA1648036010.0024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 10 KW - 20.75 Inch H x 26.375 Inch W x 20.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734196
HLA1660036010.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 10 KW - 20.75 Inch H x 26.375 Inch W x 20.75 Inch D
Tpi (Fostoria/Markel)
MARKEL734202
HLA2020836015.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 208 Volt - 3 Phase - 15 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734219
HLA2024036015.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 240 Volt - 3 Phase - 15 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734226
HLA2048036015.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 15 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734233
HLA2060036015.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 15 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734240
HLA2048036020.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 20 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734257
HLA2060036020.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 20 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734264
HLA2048036025.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 480 Volt - 3 Phase - 25 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)
MARKEL734271
HLA2060036025.024 Markel Haz Loc Heater
Markel HLA Series Hazardous Location Electric Unit Heater - 600 Volt - 3 Phase - 25 KW - 24.75 Inch H x 30.375 Inch W x 22.5 Inch D
Tpi (Fostoria/Markel)