Lenhardt & Wagner LW 150 ES, Operating Instructions Manual

Page: 58 / 187

LW 150 ES / LW 200 ES
Version: 31.01.22-001 E Page A - 56
A
M A I N T E N A N C E A N D S E R V I C E
Cylinder heads and valves
Inlet and outlet valves of the specific compressor stages are
located between valve head and cylinder. Outlet valves open
while piston upstroke or compression stroke, inlet valves o-
pen while downstroke.
Valves are subject to normal wear and tear and have to be
replaced at certain intervals (depending on specific operating
conditions). Dismount valve heads to change valves. The
three valves are combined inlet and outlet valves. The first
stage is a plate valve. The stages two and three are made of
a spring operated piston which acts inside a bronze cylinder.
Maintenance intervals
All valves should be replaced after 2000 working hours due to normal wear and tear. To replace
valves the cylinder heads have to be removed. There are no special tools required to replace these
valves.
Available special tools
Special tools are not necessary for dismounting inlet and out-
let valves but make work easier.
Order number: 006847
Special tool
Inlet and outlet valve incl. gaskets of the
3rd stage