Air Flow - Atlas Copco XA186 Dd Instruction Manual

XAS136/186 Dd
C
OMPRESSOR
LV
OS
AR
AOV
MPV NRV
Fig. 2.3
AF Air filter (compr. element)
CE
AF Air filter (engine)
E
AOV Air Outlet Valves
AR Air Receiver
BDV Blow Down Valve
BOV Blow Off Valve
CE Compressor Element
CH Coupling Housing
2.5 A ( F
IR FLOW SEE
The system comprises:
AF Air filter
AR/OS Air receiver/oil separator
CE Compressor element
UA/UV Unloader assembly with unloader valve
BDV Blow-down valve
LV Loading valve
Air drawn through the airfilter (AF
(CE) is compressed. At the element outlet, compressed air and oil
pass into the air receiver/oil separator (AR/OS).
The check valve (CV) prevents blow-back of compressed air when
the compressor is stopped. In the air receiver/oil separator (AR/OS),
most of the oil is removed from the air/oil mixture; the remaining oil
is removed by the separator element.
12
R
EGULATING
AF
CE
VV
PG
RV
FR
SV
UV
UA
VH
BDV
SL
CV
OF
FP
SL
OLG
DP
CV Check Valve
DP Drain Plug
E Engine
F Fan
FP Filler Plug
FR Flow Restrictor
LV Loading Valve
MPV Minimum Pressure Valve
. 2.3)
IG
) into the compressor element
CE
S (L
YSTEM OAD CONDITION
VI
AF
E
VV
SR
BOV
CH
CE
TS
DP
NRV Non Return Valve
OC Oil Cooler
OF Oil Filter
OLG Oil Level Gauge
OS Oil Separator
PG Pressure Gauge
RV Regulating Valve
SL Scavenge Line
The oil collects in the receiver and on the bottom of the separator
element.
The air leaves the receiver via a minimum pressure valve (MPV)
which prevents the receiver pressure from dropping below the
minimum working pressure (specified in section 8.3), even when the
air outlet valves are open. This ensures adequate oil injection and
prevents oil consumption.
A temperature switch (TS) and a working pressure gauge (PG) are
comprised in the system.
A blow-down valve (BDV) is fitted in the unloader assembly to
automatically depressurise the air receiver (AR) when the compressor
is stopped.
)
VI
E OC
F
DP
SR Speed Regulator
SV Safety Valve
TS Temperature Switch
UA Unloader Assembly
UV Unloader Valve
VH Vent Hole
VI Vacuum Indicator
VV Vacuator Valve