Email Address:

EK Series

The EK Series – the ‘Green’ cooler – is the most efficient heat exchanger offered in the water cooled series. The aluminum finned tube bundle design provides an increased surface area that allows for optimal heat rejection with low water usage. An optional Surge-Cushion® bypass is available for cold start up protection or flow surges. Sea water service options are also available. The low cost, compact design is ideal for general purpose hydraulic power unit installations.

Delta T Heat Exchangers is partnered with Thermal Transfer Products, a division of API Heat Transfer, to offer their pre-engineered heat exchangers. If you know your performance requirements, you can contact us by requesting a quote.



  • Compact size
  • High efficiency finned bundle design
  • 3/16″ tube size
  • Heat removal up to 400 HP (300 KW)
  • Oil flow rates up to 80 U.S. GPM (300 L/MIN)
  • Large oil connections for minimum entering and exiting flow restriction
  • Removable end bonnets for easy tube cleaning
  • Mounting brackets designed so that cooler can be rotated in 90° increments
  • High pressure ratings

Product Options

  • Patented built-in Surge-Cushion bypass


  • Maximum Operating Pressure – Shell Side 500 PSI
  • Maximum Operating Pressure – Tube Side 150 PSI
  • Maximum Operating Temperature 250°F


  • Shell – Steel
  • Tube Sheets – Steel
  • Baffles – Steel
  • Mounting Brackets – Steel
  • Gaskets – Nitrile rubber/cellulose fiber
  • Tubes – Copper
  • Fins – Aluminum
  • End Caps – Grey iron
  • Nameplate – Aluminum foil

Customer Focused and Driven

  • All catalog product is available with short lead-times
  • Expert application engineers are available to select and size the right product for your application
  • Custom designs are available