Operation Manual VISATRON® VN115/87plus EX
06/2016
Page 10
SCHALLER AUTOMATION
D-66440 Blieskastel / Saarland / Germany / Industriering 14 / P.O Box 1280
Industrielle Automationstechnik GmbH & Co. KG
Tel. +49(0)6842-508
-
0
/ Fax -260 / eMail: [email protected] / www.schaller.de
1
Introduction and functional overview
The newly developed VISATRON® VN87plus EX Oil Mist Detector (OMD) from
SCHALLER AUTOMATION protects large diesel engines against oil mist explosion,
caused by spontaneously occurring oil mist. It is part of a safety system that
secures the life and health of the operating staff and prevents heavy damages to
the engine.
SCHALLER AUTOMATION developed this device to meet the IACS UR M10.
The VN115/87plus EX is compliant to ATEX 2014/34/EU.
It is not possible to directly monitor all potential sources of oil mist inside a large
diesel engine. There are main bearings, large end bearings, pistons, liners, sliders,
pumps, camshaft bearings, chains, gears or even tools left behind from installation
–
all of these parts could produce oil mist e.g. in case of lubrication problems.
Therefore the philosophy of SCHALLER AUTOMATION is that only OMD-systems can
securely prevent oil mist explosions by detecting the primary origin of danger: the
oil mist itself.
The VISATRON® VN115/87plus EX OMD-System uses the approved wear-free
suction system to continuously extract the atmosphere of the crankcase
compartments and other engine locations. The system works actively and is not
simply waiting for oil mist clouds. This ensures proper reaction times from the
beginning of oil mist generation to an oil mist alarm.
To avoid false alarms, caused by splash oil, the suction system makes use of
Schaller's special suction funnels working independent of the rotation sense of the
engine. Additional draining components ensure correct working under all operating
conditions. This includes the application in power plants as well as on vessels with
their static or dynamic inclinations. False alarms initiated by condensing water
vapour are prevented by an integrated heater inside the measuring head housing.
The OMD-System consists of following parts:
VISATRON® VN115/87plus EX oil mist detector
Protection cover
Suction system including pressure regulator
Monitoring device (optional)
Filter for air support / water and oil separator
) is approved to work and use in potentially
explosive atmospheres.
All devices have a measuring head (2) which includes the optical measuring track
under the control cover (3) and a display to give the user all important information
for normal operations conditions. The measuring head is mounted on a vibration
protected base plate.
