Duct Heaters

RXDF - Explosion-Proof Duct Heater

The Ruffneck™ RXDF Explosion-Proof Duct Heater is designed for heating air or gases in hazardous environments where potentially explosive substances are present, such as oil refineries, coal mines, petrochemical plants and sewage treatment plants. They use heavy walled carbon steel finned tubular (Calrod® Type)* elements with nickel plated finish to provide safe, efficient, low temperature heat transfer.

Features & Benefits At A Glance

  • 3 standard sizes range from 2.5-50kW and 208-600V; single or double banked heating modules available
  • painted steel duct with mounting holes for attachment to the duct section; approved for mounting in horizontal duct section
  • patented x-Max® terminal housing for easy access to wiring terminal connection
  • differential pressure switch
  • factory-installed high limit sensing thermocouples
  • optional features include transition sections, stainless steel duct section, mechanical temperature control, special temperature code, outlet air thermostat and outlet air thermocouple
  • available with T2D, T3A or T3B hazardous area temperature codes
  • CSA C/US approved; GOST approved for global markets

 

RDFF - Commercial Flanged Duct Heater

The Ruffneck™ RDFF Commercial Flanged Duct Heater with finned tubular (Calrod® type*) elements is designed for use in comfort heating applications, such as make-up air heating, air pre-heating, air handling equipment, fan coils, terminal reheating, multi-zone reheating, heat pump auxiliary systems and return air heating.

The finned tubular elements are constructed using a steel tube with a corrugated steel fin wrapped around it and brazed together, which increases the heat transfer surface of the element resulting in a lower operating temperature than the non-finned tubular element designs.

Features & Benefits At A Glance

  • primary linear cutout, 160°F (71°C), 277/600 VAC, 25/10 AMP non-inductive
  • secondary linear cutout, manual reset complete with backup magnetic contactor on units under 300V, 30 kW and less, 225°F (107°C), 277/600 VAC, 25/10 AMP non-inductive
  • a wide range of optional auxiliary duct heater controls available either as factory installed on the duct heater or as an EEMAC rated control panel for wall mount, including bulb holders, silent contactors, SCR controllers, switches, magnetic contactors and more
  • models range from 1-120kW and up to 600V, 3 phase
  • frame fabricated from 16-gauge satin-coat steel
  • approved for horizontal duct installation where maximum inlet air temperature does not exceed 25°C (77°F) and maximum rating does not exceed 120 kW
  • CSA C/US & CE approved; GOST approved for global markets

 

RDIF - Commercial Insert Duct Heater

The Ruffneck™ RDIF Commercial Insert Duct Heater with finned tubular (Calrod® type*) elements is designed for use in comfort heating applications, such as make-up air heating, air pre-heating, air handling equipment, fan coils, terminal reheating, multi-zone reheating, heat pump auxiliary systems and return air heating.

The finned tubular elements are constructed using a steel tube with a corrugated steel fin wrapped around it and brazed together, which increases the heat transfer surface of the element resulting in a lower operating temperature than the non-finned tubular element designs.

Features & Benefits At A Glance

  • primary linear cutout, 160°F (71°C), 277/600 VAC, 25/10 AMP non-inductive
  • secondary linear cutout, manual reset complete with backup magnetic contactor on units under 300V, 30 kW and less, 225°F (107°C), 277/600 VAC, 25/10 AMP non-inductive
  • a wide range of optional auxiliary duct heater controls available either as factory installed on the duct heater or as an EEMAC rated control panel for wall mount, including bulb holders, silent contactors, SCR controllers, switches, magnetic contactors and more
  • model range from 1-120kW and up to 600V, 3 phase
  • frame fabricated from 16-gauge satin-coat steel
  • approved for horizontal duct installation where maximum inlet air temperature does not exceed 25°C (77°F) and maximum rating does not exceed 120 kW
  • CSA C/US & CE approved; GOST approved for global markets

 

RDFT - Commercial Flanged Duct Heater

The Ruffneck™ RDFT Commercial Flanged Duct Heater with non-finned tubular (Calrod® type*) elements is designed for use in comfort heating applications, such as make-up air heating, air pre-heating, air handling equipment, fan coils, terminal reheating, multi-zone reheating, heat pump auxiliary systems and return air heating.

The non-finned incoloy® element design should be chosen where high humidity or slightly corrosive contaminants may be present in the air stream, as this type of element features higher corrosion-resistance than the finned element design. Unlike open coil designs, duct heaters fitted with tubular elements are not subject to hazards of electrical shock, which allows installation closer to a register or grille.

Features & Benefits At A Glance

  • primary linear cutout, 160°F (71°C), 277/600 VAC, 25/10 AMP non-inductive
  • secondary linear cutout, manual reset complete with backup magnetic contactor on units under 300V, 30 kW and less, 225°F (107°C), 277/600 VAC, 25/10 AMP non-inductive
  • a wide range of optional auxiliary duct heater controls available either as factory installed on the duct heater or as an EEMAC rated control panel for wall mount, including bulb holders, silent contactors, SCR controllers, switches, magnetic contactors and more
  • available for supply voltages up to 600 V, 3 phase
  • frame fabricated from 16-gauge satin-coat steel
  • CSA C/US & CE approved; GOST approved for global markets

 

RDIT - Commercial Insert Duct Heater

The Ruffneck™ RDIT Commercial Insert Duct Heater with non-finned tubular (Calrod® type*) elements is designed for use in comfort heating applications, such as make-up air heating, air pre-heating, air handling equipment, fan coils, terminal reheating, multi-zone reheating, heat pump auxiliary systems and return air heating.

The non-finned incoloy® element design should be chosen where high humidity or slightly corrosive contaminants may be present in the air stream, as this type of element features higher corrosion-resistance than the finned element design. Unlike open coil designs, duct heaters fitted with tubular elements are not subject to hazards of electrical shock, which allows installation closer to a register or grille.

Features & Benefits At A Glance

  • primary linear cutout, 160°F (71°C), 277/600 VAC, 25/10 AMP non-inductive
  • secondary linear cutout, manual reset complete with backup magnetic contactor on units under 300V, 30 kW and less, 225°F (107°C), 277/600 VAC, 25/10 AMP non-inductive
  • a wide range of optional auxiliary duct heater controls available either as factory installed on the duct heater or as an EEMAC rated control panel for wall mount, including bulb holders, silent contactors, SCR controllers, switches, magnetic contactors and more
  • available for supply voltages up to 600 V, 3 phase
  • frame fabricated from 16-gauge satin-coat steel
  • CSA C/US & CE approved; GOST approved for global markets
Blejwas Associates, Inc.
221-A Evans Way • Branchburg, NJ 08876
Tel: (908) 253-8822 • Fax: (908) 253-8833
Send us an email
© 1981-2017 Blejwas Associates, Inc. All Rights Reserved.
Site designed by Progressive Marketing Group, Inc.
Site Map |  Login