MAN B&W Diesel a member of the MAN Group
MAN B&W Diesel A/S
Diesel ServiceTeglholmsgade 412450 Copenhagen
SVDenmarkwww.manbw.com
Spare Parts(Two-stroke & Four-stroke)Telephone: +45 33 85 11
00Telefax: +45 33 85 10 [email protected] Emergency
phone afterof ce hours: +45 40 19 35 01
Technical ServiceTelephone: +45 33 85 11 00Telefax: +45 33 85 10
[email protected] phone afterof ce hours: +45
20 48 94 40
Forwarding & ReceivingTeglholmsgade 352450 Copenhagen
SVDenmarkTelephone: +45 33 85 11 00Telefax: +45 33 85 10
16shipping/[email protected]
Alu-CoatedPiston Rings
In order to reduce the running-in time when testing compo-nents
on our 4T50MX research engine, we have developed an
aluminium-bronze coating for the sliding surface of piston rings.
Aluminium-bronze is a well-known material in bearing applications.
Furthermore, it has shown excellent results as a piston ring
coating and, consequently, it has been introduced on new engines in
order to reduce the running-in time and the cylinder oil
consumption.
As part of our ongoing programme for modernising spare parts,
Alu-Coat rings are now also offered as an alternative standard for
MAN B&W MC type engines already in service.
The introduction of aluminium-bronze coated rings means that the
normal increase in the cylinder oil feed rate after changing
piston rings can be omitted. When changing cylinder liners, the
oil consumption during running-in may also be reduced
considerably.
The technical explanation for the effect of the Alu-Coat is that
no scuf ng occurs when using the material combination Alu-minium
Bronze/Grey Cast Iron as the wear component in a diesel engine
cylinder. Furthermore, the Alu-Coat contributes to the running-in
of the cylinder liner so that when the Alu-Coat has worn off after
some 1000 running hours, both the liner and the piston rings will
have been perfectly run-in.
! !
4/0 29+#
!LU#OAT!!
Copyright MAN B&W Diesel A/S. Reproduction permitted
provided source is given.Reg. No.: 39 66 13 14
P.9142.01 Apr. 05
