3.18 Government-loaned property. Unless otherwise specified (see 6.2), the following
property in the quantity indicated will be loaned by the Government (see 6.6).
Heater, engine and shelter,
ground Type H-1
3.19 Type I, reciprocating.
3.19.1 Compressor. The type I compressor shall deliver the capacities of free air (see 6.7)
specified in table I at a pressure of 175 pounds per square inch gauge, (psig) as determined by
ASME Performance Test Code 9. The components of the compressor shall be balanced when
the compressor is operated in conjunction with the gasoline engine, vibration shall be minimized.
The compressor shall not exceed the contractor's recommended continuous operating speed. The
compressor shall be air cooled. The cylinder heads or cylinder assembly (if cast integral) shall
be removable. The intake and exhaust valves shall be removable. A fan shall be provided for
TABLE I. Compressor characteristics.
3.19.2 Intercooler and aftercooler. When a multi-stage compressor is furnished, an
intercooler shall cool the air between the pressure stages and shall be located so as to be cooled
by the air blast from the fan. A spring-loaded-type pressure-relief valve shall be installed
between the pressure stages to protect the low-pressure cylinder in case of failure of the
high-pressure cylinder valves. The temperature measured at the discharge of the air receiver
shall not exceed ambient +100 F at a pressure of 200 psig. If necessary to meet the temperature
requirements specified herein, an aftercooler may be provided between the last stage of the
compressor and the air receiver tank. Aftercoolers shall be air cooled.