POLYURETHANE
MACHINERY
CORPORATION
PH-2 SERVICE MANUAL
3. CHARACTERISTICS
3 CHARACTERISTICS
The PH Series Proportioner has been designed and built for the application of
polyurea chemical systems, polyurethane foam chemical systems, and some specific two-
component epoxy systems.
3.1 PRINCIPAL HEATING SYSTEM
The Proportioner consists of one (1) Material Heater without internal seals. The
Low Pressure Heater has three (3) Heating Elements per fluid side rated at 1,250, 1,500,
or 1750 watts, each giving the Proportioner a total heat output of 7,500, 9,000, or 10,500
watts. The High Pressure Heater has four (4) Heating Elements per fluid side rated at 1750
watts, each giving the Proportioner a total heat output of 14,000 watts. Every heating
system provides the necessary control and safety components for their precise operation.
The Material Heater design allows for a controlled and precise temperature differential (∆T)
and material application temperatures of up to 190
o
F under ambient temperatures.
3.2 HOSE HEATING SYSTEM
The system is designed with a 3 KVA Isolation Transformer that enables effective
heating of up to a total hose length of 310 feet (also available with a 2KVA transformer
and a 5 KVA transformer for maximum hose lengths of 210 and 410, respectively). The
system includes an innovative hose heating concept in which the continuous braid tinned-
copper jacket is distributed evenly around the circumference of the hose providing a uniform
heating watt density and precise control of the material application temperature. This hose
heating element design is extremely resistant to fatigue failure.
Figure 1: Hose Heating Diagram
REVISION 1.2 8
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