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Hydraulic fluid Heater INFO                  

When exposed to cooler temperatures, reservoirs storing hydraulic fluid often need to be heated. Cool hydraulic fluid can suffer from poor flow rates resulting in sluggish performance.  To ensure easy flow, Warren Electric Corporation's hydraulic fluid heaters are used to maintain the fluid at a desired temperature. 

Warren Electric’s tubular element hydraulic fluid heaters are designed to be directly immersed in hydraulic fluid.   These hydraulic fluid heaters are often installed horizontally near the bottom of the tank/reservoir or can be inserted in a casing.  They usually range from .5 KW to 12 KW (other KW are available if needed).  Click here to access catalog hydraulic fluid heater catalog.

Hydraulic Oil HeatersWhen immersed in tanks, Hydraulic oil heaters are commonly mounted via 2", 2 1/2", and 3" NPT screw plugs as well as Warren Electric Corporation’s 4 1/2" O.D. flange ("A/B") mount.    Warren Electric Corporation also has the capability to easily manufacture custom fluid power heaters to meet unique application requirements.

Circulation HeatersHeaters with casings are referred to as circulation heaters.  Hydraulic fluid enters the casing through an inlet, is heated as it flows past the elements, and then exits the casing via an outlet.  Circulation heaters are available with or without insulation.

When determining what size heater is needed for a hydraulic oil reservoir, it is often helpful to consult a heater manufacturer.  Warren Electric Corporation Quick Quote is a convenient means to receive sizing assistance. 

Click here to access Hydraulic Fluid Quick Quote.

Variables that are take into consideration when sizing a hydraulic fluid heater include:

  • Volume to be heated
  • Dimensions and capacity of tank
  • Thickness of insulation on tank (if any)
  • Temperature to maintain, worst case ambient temperature and desired heat-up time if tank is allowed to cool during non-operating periods
  • Available operating Voltage & Phase
  • Environmental operating conditions to select the proper terminal enclosure
  • Desired temperature controls (available with or without thermostat, thermocouple or over-temperature cut out devices)
  • Flow rate, Desired Inlet & Outlet Temperatures if heater will be used in a casing  

Typically, fluid power heaters have a low watt density, approximately 10-12 WSI.   This prevents the fluid and/or the heater from being damaged while heated.  It is wise to know the brand of heat transfer fluid being heated, thus the factory can confirm the “ideal” WSI for the particular fluid within the reservoir.

Temperature controls are needed to ensure desired temperatures are maintained when heating fluid in a reservoir. SPST Integral Thermostat, 60° - 250°F (16°-121°C), are most commonly used.  However, thermostats with other temperature ranges, thermowells or thermocouples can be used. 

Click here to access thermostat information.

Reservoir location and environmental conditions should be taken into consideration when selecting terminal enclosures.   Warren Electric Corporation’s hydraulic fluid heaters are provided with a heavy duty general purpose terminal enclosure.  If needed weather-resistant, dust-resistant, explosion-resistant, weather-resistant & explosion resistant terminal enclosures are also available, upon request. 

Click here to access information regarding terminal enclosures.

For more information, contact wec@warrenelectriccorp.com or visit www.warrenelectriccorp.com

Hydraulic Oil Heaters

Typical applications for hydraulic fluid heaters include fluid power, compressors, hydraulics, turbines, and bearings.


HL-100 Catalog

Hydraulic Oil Heater Catalog - Request HL-100 CatalogThe most comprehensive catalog of hydraulic & lube oil heaters in the industry features standard designs in 2", 2-1/2", and 3" screw plugs and our "AB" series of compact flanged heaters from .5 kW to 12 kW. Request the HL-100 catalog on the WEC literature page.

Download the Warren Electric "Quick Quote" or request a quote online for assistance on your electric heater application!


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