AN EXPLODED VIEW OF ROBUSCHI RBS ROOT BLOWER

MAXIMUM WORKING PRESSURE AND TEST PRESSURE

There is some misunderstanding of maximum working pressure and test pressure among some pump users
a) DIN 24255 pump do specify Maximum Hyrdostatic Test Pressure of 24 bar , note this is test
pressure done hydrostatically and not operating condition

b) Maximum Working Pressure at 16 bar at maximum speed of 3600 rpm ( 60 hz 2 pole )
In Malaysia ,it is 50 hz 2 pole ,which is 2900 rpm

Therefore .again specify the operating head rather than maximum 16 bar as what we
encounter this morning

Customer wants a pump maximum 16 bar but for circulating purpose only which we reckon that then system head to be only about 3 bar or 30 M
And flow . 350 m3/hr at 16 bar ?

Big motor kw is required for this duty

Verticle Sump Pump Mounted on Poontoon in the Effluent Pond at a Palm Oil Mill
This pump serve as disludging pump and as an aereator

PUMPING IN CORROSIVE ENVIROMENT

In most cases , we tend look at pump material of construction when come to handling of corrosive pumping media and this usually cause no problem if the materials are compatible to the media to be pumped

However the construction material of drive components like geared unit or motor is often ignored .If the pump media are store in open tank , evaporation takes place rendering
the working area to be full of acidic fumes .These fumes will then corrode the gear nox or motor
which usually in cast iron construction . You almost never come across motor with SS body ,right ?

Solution

a) get the work area well ventilated
b) coating of the Gear unit and motor with proper coating
c) choose a motor that is Aluminum body , plastic fan cover and plastic
terminal box

These will surely extend the life of it and lower the maintenance

A customer in Gemas has been paying good attention in this issue and I am glad
to hear one of the pump has been able to last