Air Inlet System, Functional Description; Compressor Discharge System, Functional Description - Sullair E900H User Manual

E900H User Manual
2.4 Air inlet system, functional
description
1. Air filter
2. Inlet valve
3. Inlet adapter
Figure 2-2: Air inlet system
Refer to Figure 2-2. The compressor inlet system con-
sists of one air filter, a compressor air inlet valve and
interconnecting piping to the compressor. Also, an air fil-
ter restriction indicator gauge is located next to the air fil-
ter housing.
The air filter is a 2-stage unit with a safety element dry
element-type filter. This filter is capable of cleaning
extremely dirty air. However, in such cases, frequent
checks of the air filter will be required. Referring to the air
filter restriction gauge will indicate when restriction of the
air passing through the filter becomes too high.
At this time, change the air filter element. Refer to Sec-
tion 6.9.5: Air filter maintenance on page 46. This indica-
tor should be checked daily, after start-up under normal
conditions.
The compressor air inlet valve controls the amount of air
intake of the compressor in response to the air demand.
4. Compressor
5. Restriction indicator
6. Air inlet elbow
02250203-986 R03
Subject to EAR, ECCN EAR99 and related export control restrictions.
2.5 Compressor discharge system,
functional description
Refer to Figure 2-3. The Sullair compressor unit dis-
charges compressed air/fluid mixture into the receiver
tank.
The receiver tank has three functions:
• It acts as a primary fluid separator.
• Serves as the compressor fluid storage sump.
• Houses the final fluid separator.
The compressed air/fluid mixture enters the receiver tank
and is directed against the tank side wall. By change of
direction and reduction of velocity, large droplets of fluid
separate and fall to the bottom of the receiver tank. The
fractional percentage of fluid remaining in the com-
pressed air collects on the surface of the final separator
element as the compressed air flows through the separa-
tor. As more and more fluid collects on the element's sur-
face, the fluid descends to the bottom of the separator. A
return line (or scavenge tube) leads from the bottom of
the separator element to the inlet region of the compres-
sor unit. Fluid collecting on the bottom of the separator
element is returned to the compressor by the pressure
difference between the area surrounding the separator
element and the compressor inlet. An orifice (protected
by a strainer) is included in this return line to help assure
proper flow.
The receiver tank is code rated. A minimum pressure/
check valve, located downstream from the separator,
helps assure a minimum receiver pressure during all con-
ditions. This pressure is necessary for proper air/fluid
separation and proper fluid circulation.
A minimum pressure/check valve at the outlet of the
receiver is installed to prevent compressed air in the ser-
vice line from bleeding back into the receiver on shut-
down when the compressor is being run in parallel with
other compressors tied to a large air system.
Fluid is added to the receiver tank via a capped fluid filler.
A fluid level gauge glass enables the operator to visually
monitor the receiver tank fluid level.
Do not remove caps, plugs and/or other compo-
nents when compressor is running or pressur-
ized.
Stop compressor and relieve all internal pres-
sure before doing so.
2: Description
WARNING
19