Sterlco Midsize - Manual (Page 9)

Portable Hot Oil Temperature Control Units Page 9
Ful-Flo Valve
A regulating by-pass line featuring a Ful-Flo valve is standard in all units. This is a safety
device to prevent excessive pressure in the event that the delivery line is obstructed. Each
Ful-Flo is factory preset to limit system pressure as specified by the customer. It must not be
tampered with in any way.
In the event of an obstruction in the line, the Ful-Flo will open and divert fluid from the
delivery TO PROCESS line to the return From Process line. A constant flow of fluid is
maintained through the heater tank to prevent damage to the heating elements and fluid.
Cooling
Optional
The manufacturer-designed shell and tube heat exchanger is provided as optional equipment
in this unit. The design features U-tube construction and copper-nickel tubes for durability
and optimal heat transfer.
The modular construction (unique to our units) allows the tube bundle to be easily removed
for periodic cleaning. Additionally, check valves are installed on the water supply and drain
lines to prevent water from back flowing into the heat exchanger from a closed drain or into
the water supply piping.
The controller automatically regulates cooling by opening and closing the cooling solenoid.
This allows the proper amount of cooling water to pass through the tubes of the heat
exchanger and out the drain. A water supply of 75 psi (517.1 kPa/5.2 bars) maximum is
required for connection to the heat exchanger.
Connection Lines
Connections for TO PROCESS and FROM PROCESS lines are 1" NPT (25.4 mm). Water
connections for COOLING WATER SUPPLY and COOLING WATER DRAIN are ¾”
NPT (19.1 mm). (see Section 3.) The customer is responsible for conversions to metric
standards.
We stock many lengths of flexible metal hose; the part number is 572-16969. State the length
of hose you want when ordering.
!
WARNING
Component failure may result in high-temperature
oil spray, causing serious injury or death.
Make sure hoses, valves, and other components
installed in your process can withstand maximum
temperature and pressure of the unit; check unit
nameplate for specific capacities.
All components must be carefully inspected for
condition before installing. Make sure you have
factory components if you have any doubt.