Blagdon Pump B50 Metallic - Manual (Page 9)

HG-CF-1099 Rev. S – 01.05.14 Page 9
Suction Lift Installation
Flooded Suction Installation
Submerged Installation
In the event of diaphragm rupture, pumped material may enter the air end of the pump, and be discharged into the atmosphere. If pumping
a product which is hazardous or toxic, the air exhaust must be piped to an appropriate area for safe disposition.
WARNING!
Exhaust Safety when pumping hazardous liquids
Exhaust Safety :-
When a diaphragm fails during operation, pumped liquid can enter and contaminate the air side of the pump. If diaphragm failure is not
severe, i.e. a small split or hole, then the pump can continue to run, with air being forced into the product being pumped. If however the
failure is more serious, then the pump may stop, with fluid or fumes being expelled through the exhaust. Under these conditions it is
recommended that the exhaust is piped away to a safe area. In standard suction lift conditions this can simply be done by piping from the
exhaust connection to a safe area. Multiple installations can be piped to a common connection, then to a safe area. In flooded suction
conditions the exhaust must be taken to a point higher than the fluid level to prevent any siphoning away. In submerged conditions ensure
exhaust is piped away above fluid level.
In all conditions ensure exhaust outlet is not expelling across a non-conductive surface. The exhaust must not be placed less than 100mm
from any non-conductive surface, as this may generate a propagating brush discharge resulting in a possible ignition source.
Grounding the pump :-
This unit is supplied with a natural earth ground cable. This cable is 2
meters in length and permanently connected through a stud at one
end to the pump centre casting. The other end is free to connect to
the nearest available suitable point to provide a natural earth ground.
This must be done to reduce the risk of electro-static sparking.
Refer to table on Page 13 for details and relevant Part Numbers.
Take action to prevent static sparking. Fire or
explosion can result, especially when handling
flammable liquids. The pump, piping, valves,
containers or other miscellaneous equipment
must be grounded.
WARNING!
Atex models (see also page 15)