Blagdon Pump B75 Metallic - Manual (Page 22)

Blagdon Pump • A Unit of IDEX Corporation • R79 Shannon Industrial Estate • Co Clare, Ireland • Tel: +353 (0) 61 471933 • Fax: +353 (0) 61 475046
www.blagdonpump.com • E-Mail: [email protected]
x75mdl1sm-rev0812
Page 20
Air Operated Double Diaphragm Pump 6/05 Page 20
SAFE AIR
EXHAUST
DISPOSAL
AREA
PUMP INSTALLATION AREA
1" DIAMETER AIR
EXHAUST PIPING
1" DIAMETER AIR
EXHAUST PIPING
1" DIAMETER AIR
EXHAUST PIPING
MUFFLER
LIQUID
LEVEL
SUCTION
LINE
LIQUID
LEVEL
SUCTION
LINE
MUFFLER
MUFFLER
CONVERTED EXHAUST ILLUSTRATION
Illustration #1
Illustration #2
Illustration #3
PUMPING HAZARDOUS LIQUIDS
When a diaphragm fails, the pumped
liquid or fumes enter the air end of the
pump. Fumes are exhausted into the
surrounding environment. When pumping
hazardous or toxic materials, the
exhaust air must be piped to an
appropriate area for safe disposal. See
illustration #1 at right.
This pump can be submerged if the
pump materials of construction are
compatible with the liquid being pumped.
The air exhaust must be piped above
the liquid level. See illustration #2 at
right. Piping used for the air exhaust must
not be smaller than 1" (2.54 cm)
diameter. Reducing the pipe size will
restrict air flow and reduce pump
performance. When the pumped product
source is at a higher level than the pump
(flooded suction condition), pipe the
exhaust higher than the product source
to prevent siphoning spills. See
illustration #3 at right.
CONVERTING THE PUMP FOR
PIPING THE EXHAUST AIR
The following steps are necessary to
convert the pump to pipe the exhaust
air away from the pump.
Remove the muffler (item 42). The
air distribution valve (item 1) has 1" NPT
threads for piped exhaust.
IMPORTANT INSTALLATION
NOTE: The manufacturer recommends
installing a flexible conductive hose or
connection between the pump and any
rigid plumbing. This reduces stresses on
the molded threads of the air exhaust
port. Failure to do so may result in
damage to the air distribution valve body.
Any piping or hose connected to
the pump’s air exhaust port must be
conductive and physically supported.
Failure to support these connections
could also result in damage to the air
distribution valve body.
1
On ATEX compliant units
the pump comes equipped
with a standard metal
muffler
Air Valve Assembly
42