Owner manual
avbmdl1sm-rev0111 Model AVB Metallic Page 28
SAFE AIR
EXHAUST
DISPOSAL
AREA
PUMP INSTALLATION AREA
1" DIAMETER AIR
EXHAUST PIPING
1" DIAMETER AIR
EXHAUST PIPING
MUFFLER
LIQUID
LEVEL
SUCTION
LINE
MUFFLER
• 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.
• Piping used for the air exhaust must not be smaller than 1" (2.54 cm) diameter. Reducing
the pipe size will restrict air ow and reduce pump performance. When the pumped
product source is at a higher level than the pump (ooded suction condition), pipe the
exhaust higher than the product source to prevent siphoning spills. See illustration #2 at
right.
• The following steps are necessary to convert the pump to pipe the exhaust air away from
the pump.
• Remove the mufer. The air distribution valve has 1" NPT threads for piped exhaust.
• The manufacturer recommends installing a exible 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.
• Failure to support these connections could also result in damage to the air distribution
valve body.