Model: ST12

Operating Temperature

125°F (52°C) to 175°F (79°C)


(12) 55-gallon drums; 675 lbs. per drum

Heat Source & Capacity

Saturated steam, 10-200 PSIG . All heat exchangers are welded by A.S.M.E. certified welders and then hydro-tested at 300 PSIG.

  • Heat Exchanger: 124,000 BTU’s per hour @ 150 PSIG
  • Hot oil and hot water (5-100 PSIG) also available.

Circulation Fan

3,500 CFM, TEFC motor. Explosion-proof motor also available.

Input Voltage

Standard: 480/3/60. Please consult factory for additional voltage options.

Additional Options

Control System Options

  • No controls
  • Non-electronic, self-acting temperature controller, limited to 150 psig, available in the following ranges:
    • 125°-212°F, ½” valve
    • 158°-300°F, ½” valve
  • Single set-point digital temperature controller and redundant high-limit controller housed in a NEMA 12 enclosure with full voltage lockable disconnect switch. Controls are designed and wired to NFPA 70 and 79 electrical standards in our own UL508A certified panel shop. Independent third party inspections available.

                 Electronic Control Options:

    • NEMA 7 explosion-proof enclosure
    • IP65 enclosure (meets NEMA 12, 3R, and 4X)
    • Batch Timer: Infinitely adjustable up to 100 hours; includes illuminated On/ Off switch to indicate timed operation and audible alarm when time has elapsed.
    • Chart Recorder: Single pen circular paper chart recorder for continuous monitoring of temperature data. Comes with (1) Type “J” thermocouple input.
    • Data Logger: Multiple input digital data logger continuously records temperature and other process data. Allows downloading of digital data files through USB or Ethernet connection. Data can also be viewed on a full color display or on a web server when connected to a network.
    • Door Switch: Automatically disables heat when door is opened.
    • Ramp/ Soak Controller: Programmable ramp/ soak temperature controller with capability to store different recipes with multiple segments.

Standard construction includes an all welded 1/8″ steel shell with 3″ x 6# mineral wool insulation. Heat loss is minimized by a proprietary wall design featuring a welded inner shell and a completely isolated outer frame and covers. A top mounted heater box saves floor space and provides high-convection airflow for faster heat-up times. This model features top-mounted lifting eyes for easy installation and transportation.


  • Gravity roller conveyor set on incline to efficiently convey drums through tunnel.
  • 2 ½” diameter x 11 gauge rollers with sealed bearings on 4 ½” roller centers.
  • Proprietary escapement device allows discharge of (1) drum at a time.
  • A variety of powered and unpowered standard conveyor options and configurations are available.

Spill Containment

  • 81 gallon capacity
  • Sump drain, 1” NPT


  • Pneumatic vertical lift guillotine doors on both ends provides convenient drum entry and exit
  • Requires compressed air at 60 PSI


  • Standard: Blue or gray alkyd enamel
  • Optional: Premium finish for corrosive environments
  • Viscosity Reduction
  • Melting
  • Continuous Process

LEWCO Drum Heating Tunnels are designed and manufactured to industry standards. Our engineers stay current with the latest revisions to these standards. If there is a specific industry standard or code compliance that you require for your process heating application, please contact one of our highly knowledgeable Applications Engineers to learn how LEWCO can help!

Industry Standards