10/12/2010
18
Company Confidential
AIR FLOW & REGULATION (7/71
– 12/56)
Regulation
Orifice
Company Confidential
SEPARATION SYSTEM
• Functions of the separation system:
– Removing the oil contained in the compressed air
• Most of the oil is removed from the air through a specially shaped
baffle in the separator tank.
• The remaining oil is removed by the separator element.
Company Confidential
SEPARATION SYSTEM
•
The air and oil mixture discharges from the airend into the separator
receiver. Here most of the oil separates out from the mixture under
gravity when it impinges on the underside of the specially-shaped base of
the separator element. The separator element then removes any
remaining oil entrained in the air. The oil which flows down the inside
surfaces of the element and accumulates on the base is returned via the
Scavenge line (because of the pressure differential) to the airend.
•
The orifice in the scavenge drop tube controls the flow rate through the
scavenge line.
•
The minimum pressure valve (or sonic orifice) is located before the
service taps. It ensures that the pressure inside the separator receiver
never falls below 4.4-5.1 bar (65-75 psi). This ensures there is sufficient
oil circulation in the system at all times. It also limits the pressure drop
across the separator element, thereby protecting it.
