sstmb evaporator evapco clark johnson co


STMB Unit Coolers


Small to medium size unit coolers for freezers, coolers and docks requiring low, medium and high temperature applications. SSTMB Models offer improved accessibility features, clean cabinet/pan design and corrosion inhibiting materials of construction.  SSTMB Evaporators are offered with Stainless Steel tube/Aluminum fin with a new hygienic cabinet design. This product includes Low Energy and Low Sound models.  These models feature axial fans and many end user oriented features such as:


  • Sloped Top Panels
  • Hinged Fan Panels
  • Dual Sloped Full Coverage Drain Pans
  • Clean Cabinate Design
  • Certified Under AHRI Standard 420

Design Features

Maintenance Features

Optional Equipment

Unit Specification

SSTMB Unit Coolers - Design Features


STM evaporators are equipped with owner-oriented benefits that solve many operational problems end users have experienced with traditional evaporators. Cleanability, good maintenance access and a safe working environment are important concerns of most end-users. EVAPCO has designed the STM Evaporator to address all of these issues and to provide the easiest evaporator to clean and maintain.

SSTMB - Maintenance Features


SSTDB Low Profile Coolers - Optional Equipment

STM Series Evaporators


Low Profile Unit Coolers and Product Freezers


Innovative Design Features with Superior Quality, Performance and Dependability


Low Profile Dual Coil Models for Low and Medium Temperature Applications in Rooms with Low Ceiling Height Requirements. STD Models Feature a Unique Clean Cabinet/Pan Design Available in Durable Materials of Construction. STD Evaporators are Offered with Stainless Steel tubes and Aluminum Fins.

Design Features


Heavy Duty Coil with Stainless Steel Tube with Aluminum Fin. Standard Catalog Models with Three, Four or Six Fins per Inch, Variable Fin Spacing Available as an option.


Coil Built in Accordance with ASME/ANSI B31.5. Charged With Nitrogen Prior to Shipment to Prevent Entry of Moisture and Contamination. Pressure Tested Under Water to 400 PSIG.


Heavy Gauge G-235 Galvanized Steel Housing for Superior Corrosion Resistance and Longer Life (2.5 Times the Zinc Protection of Other Manufacturers). Optional Stainless Steel Pan and/or Casing for Critical Process Environments.


Hinged Fan Panels to Provide Access to the Fan Motors and the Air Exit Side of the Coil. This Feature Facilitates Cleaning of the Coil and Drain Pan as well as Allowing the Operator to Perform any Maintenance Required to the Interior of the Unit.


Heavy Duty PVC Coated Fan Screens conform to all OSHA Requirements. High Efficiency Sheet Metal Fan Blades for Low Noise to Improve Worker Comfort and Safety. Optional Cast Aluminum Fan Blades are Available for Low Temperature Applications.


Draw Thru or Blow Thru Configurations Depending on Room Temperature and Application Requirements.


Totally Enclosed Air Over (TEAO) Fan Motors with Sealed Bearings and Low Temperature Grease for Reduced Maintenance and Longer Life. Fan Motors on Catalog Models up to 1-1/2 HP are Equipped with Automatic Thermal Overload Protection.


Individually Wired Fan Motors to NEMA 4 Junction Boxes. Motors may be Supplied with Disconnects and/or Starters.


Hygienic Drain Pans are Sloped in Two Directions to Prevent Water from Pooling in the Pan. The Drain Pans are Custom Engineered and Equipped with End Outlets for Low Height Drain Piping.


Hot Dip Galvanized Structural Steel Legs are Designed for Greater Structural Rigidity and Easier Installation. STM Models Ship with Sheet Metal Channels that Allow the Unit to be Easily Handled with a Forklift. Once the Unit is Installed, the Shipping Supports are Easily Removed.


Superior Defrost Technology with Optional Water Defrost, Electric Defrost and Hot Gas Defrost Arrangements Available. Optional Hot Gas Defrost Pan Includes Closely-Spaced, Heavy Wall Pan Coil. Hot Gas Pan Coil may be Piped either in Parallel or in Series with Cooling Coil. Factory Mounted Piping with Pan-to-Coil Check Valve.

Innovative New Technology


Coil Design Developed Through Extensive Testing at EVAPCO's Advanced Research and Development Laboratory and Industry Experience.


  • Thermal Performance Guaranteed.
  • Optimized Coil Circuiting for Increased Performance.
  • Clean Tube and Fin Pattern Ideal for Food Freezing Applications.


Proven Performance Resulting In:


  • Lower Horsepower
  • Greater Capacity
  • Hygienic Design

Clark Johnson Company, Inc.       2016