Specifications

Air system – continued:
 Crank shaft shall be single piece forged steel construction, supported in the crank case by three
long-life roller bearings
 The connecting rods shall be single piece design constructed of high strength aluminum alloy
 Each connecting rod shall incorporate a roller bearing at the crank end and a needle bearing at the
pin end
 Pistons shall be constructed of heavy duty aluminum alloy
 Piston rings on the second and third stage are cast iron; first and fourth stage rings shall be high
strength polymide
 Final stage shall incorporate a free floating, heavy duty aluminum alloy piston driven by a guide
piston and third stage discharge pressure
 Cylinders shall be cast iron construction with deep cooling fins on the external surface. Cylinders
shall be arranged in a “W” configuration with each cylinder located directly in the cooling fan’s blast
 Cylinders shall be removable from the crank case
 Compressor’s flywheel shall be aluminum alloy with a multi-wing, high velocity cooling fan
 An inter-stage cooler shall be provided after each stage of compression and an after cooler shall be
provided after the final stage of compression
 Cooler assemblies shall be individually detachable from the compressor, located directly in the
cooling fan’s blast and made of stainless steel
 The after cooler shall cool the air to within 18° F of ambient temperature
 Cool-down cycle shall not be required prior to stopping the compressor
 A separator shall be supplied after each stage of compression, excluding the first stage and a
coalescing separator shall be supplied after the final stage of compression
 An automatic condensate drain (ACD) system shall be supplied for all of the separators
 Adjustable drain timers shall be factory pre-set to drain the separators approximately every fifteen
(15) minutes for approximately six (6) seconds
 ACD system shall unload the compressor on shut down for unloaded restart
 Exhaust muffler shall be supplied
 The condensate reservoir shall have a high liquid level indication system to provide system
shutdown and to alert the operator that the condensate reservoir is at capacity
 Manually operated valves shall be supplied to override the automatic operation of the ACD system
 Compressor shall be lubricated by a low pressure lubrication system incorporating a gear driven,
low pressure oil pump, easily replaceable oil filtration element and oil pressure regulator

Sight glass for checking the oil level shall be provided
 Oil drain for the compressor shall be piped to the outside of the frame
 Compressor shall be equipped with an inlet filler with replaceable particulate element
• Prime Mover and V-Belt Drive
 Engine driven units shall be supplied with electric start, electronically actuated clutch and speed
control solenoid
 Enclosure shall be provided for battery
 H13-G unit shall have a 13 hp gasoline engine. Engine shall be a single cylinder, four cycle, air-
cooled with overhead valves
 H13-D shall have a water cooled 18 hp diesel engine
 Compressor and prime mover shall be mounted on a common base that is vibration isolated from
the system’s main frame
 Power from the prime mover shall be transmitted to the compressor by a v-belt drive
 Engine driven units shall be supplied with a sliding base
 V-belt drive shall be guarded
 Rotation arrows shall be affixed on the compressor