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THERMAL FLUID HEAT TRANSFER SYSTEMS / SL Series Hot Oil Systems
THE SL series of heat transfer systems are designed for closed loop temperature control of high temperature heat transfer fluids. These completely packaged systems are designed for a maximum operating temperature of 550°F (SL550), 600°F (SL600), 650°F (SL650) or 750°F (SL750).
Catalog Listing Hot Oil Systems
pdf hot oil system brochure

SPECIFICATIONS:

  • Electrically operated
  • Horizontal centrifugal pump
  • 208 thru 575 Volts, 3 phase
  • 20 to 360 kW and higher
  • Four (4) design temperatures;
    550°F, 600°F, 650°F and 750°F
  • NEMA 12, 4 or 7

SL Series standard components include an electric heater, centrifugal pump, thermal expansion tank, control center, strainer, supply & return valves and connecting piping mounted on a welded steel, drip proof base. Each unit is completely piped and wired and includes foam glass insulation with a metal jacket on the internal piping and heater chamber. A hot functional test is performed before shipment. The SL series is available with a variety of standard and special options. The common options are listed on pages 7 and 8 of this bulletin.

FEATURES:

  • All welded construction
  • Closed cell insulation
  • Drip proof base
  • PID temperature controller
  • High limit device with manual reset
  • Expansion tank shipped loose for mounting at the highest point in the piping system
  • Isolation gate valves and strainer
  • SCR power control on heater circuits
  • Hot functional test of system prior to shipment
  • Highly customizable
SL SERIES
The following SL System Table lists the main
features and differences between the four (4) design temperatures.
OPTIONS AND CUSTOM DESIGNS
The following SL System Table lists the main features and differences between the four (4) design temperatures.

FLUID HEAT 550 FLUID HEAT 600 FLUID HEAT 650 FLUID HEAT 750

APPLICATIONS:

REACTORS • ROLLS • EXTRUDERS
• KETTLES •MOLDS • LINE TRACING
• DRYERS • DIES • EXCHANGERS
• PLATENS • TANKS • PRESSES

TOP MOUNTED EXPANSION TANK -
The tank will be designed to mount on top of the system when remote mounting is undesirable. (A1) Double drop leg piping allows full process flow through the expansion tank to remove air and low boilers during startup.

LOW or HIGH LEVEL FLUID ALARM -
A float type level switch is mounted in the expansion tank. The fluid alarm will automatically shut the system down and turn an alarm light “ON” if the expansion tank fluid drops below (low) or rises above (high) the desired level.

NITROGEN BLANKET -
An inert gas blanket on the expansion tank provides NPSH for the pump, limits oxidation of the heat tranfer fluid and prevents fluid phase change. This is standard on the SL750 Series.

LOW or HIGH PRESSURE ALARM -
A pressure switch will automatically shut the system down and turns an alarm light “ON” if the system pressure is outside the desired range. (not shown)

HEAT TRANSFER FLUID LOW FLOW ALARM -
A differential pressure switch across an orifice plate flow element automatically shuts down the heater and turns an alarm light “ON” if the heat transfer fluid flow drops below the alarm limit.

HAZARDOUS AREA DESIGNS -
Units are available using a cast NEMA-7 (F1) enclosure or with an air purge for (F2) Class I, Division 1 or 2 areas.

SIDE ENCLOSURES -
Removable sheet metal panels are available.

ASME STAMP -
The heating chamber and expansion tank can be stamped in accordance with the ASME Boiler and Pressure Vessel Code

PUMP SELECTION -
Special pumps are available, including choice of brand and pump type.

COOLING -
Cooling is available as an option on SL systems using shell and tube heat exchanger and an on/off three way diverting valve. This design can be modified for proportional cooling if required.

CUSTOM DESIGNS -
The SL Series can be custom designed for your special application.

MODEL PFS-1 PORTABLE PUMPING AND FILTERING OIL SYSTEM -
This is a compact portable unit and is equipped with disposable elements to remove contaminants and water from oil. This unit is great for filling and draining heat transfer systems. (Maximum fluid temperature is 200°F.) Request Bulletin SO-1.

HEAT TRANSFER FLUIDS
Heat Exchange And Transfer, Inc. is a distributor for most heat transfer fluid manufacturers.

STARTUP SUPERVISION -
This service is optional on the SL550, SL600 and SL650 systems and is privided with the SL750 system. Request Service Sheet GSP for policy and rates.


STANDARD CONSTRUCTION FEATURES

GENERAL
The system is pre-wired and skid mounted on a drip proof base. The sides and top are open for easy access. Each system is filled with fluid*, energized and fully tested at the factory prior to shipment. The customer is invited to the factory to receive operational and maintenance training during the testing of their new equipment. The system is designed for minimum field installation, requiring only process piping and utility connections.

CONTROLS
The control center is designed in accordance with the National Electric Code and includes: PID temperature controller, preset high limit device with manual reset, main fused disconnect, contactors, SCR power controllers, motor starter with overloads, individually fused heater and motor circuits, control voltage transformer, power indicating lights, heater selector switch and pump start/stop push buttons, all mounted and wired in a NEMA 12 enclosure.

*NOTE: Fluid can be supplied with the equipment as an option.

SAFETY FEATURES:

HIGH LIMIT DEVICE
This controller protects system by shutting down power to the heater circuits in case of excessive temperature. Manual resetting is required. This non-adjustable device is pre-set at the factory.

NON WICKING INSULATION
The heating chamber and piping are insulated with closed cell foam glass insulation which does not absorb heat transfer fluids.

THROUGH THE DOOR HANDLE
Handle interlock between the main fused disconnect and the enclosure door prevents door from being opened when power is on.

PUMP TO HEATER INTERLOCK
Control interlock between the motor starter and heater contactors prevents the heater from being energized when the pump is not operating.

CENTRIFUGAL PUMP DESIGN
The system design pressure is well above the maximum pressure that the pump is capable of delivering.

 


 
 
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