installation &
operating instructions
Design Envelope
4300
&
4380
Vertical In-line Pumping Unit
6
1.2.2.2
Piping in many mechanical rooms is hung close to the ceiling
and larger pumps are mounted near ground level for ease of
maintenance.
Fig
1.2.2.2
illustrates such an arrangement with
the piping supported at the ceiling and the
vil
unit installed
with an Armstrong Suction Guide and Flo-Trex valve. Many
very large
vil
pumps are installed in this manner.
fig. 1.2.2.2
System inlet
System outlet
Recommended
field pressure
gauge piping
arrangement
Flo-trex valve
Flush line
Drain connection
Suction
guide
Hangers support the weight of the filled
piping, pumps and fittings
Pipe hanger
(typ.) see
specification
for size and
type
Pet cock
(typ.)
2'
or
3'
height above
finished floor
1.2.2.3
Should additional space saving be required the discharge spool
piece may be replaced by a long-radius elbow.
fig. 1.2.2.3
Drain
Connection
Suction
Guide
System inlet
Recommended field
pressure gauge
piping arrangement
Flo-trex valve
Hangers support the weight of the
filled piping, pumps and fittings
Pipe hanger
(typ.) see
specification for
size and type
System outlet
Flush line
1.2.2.4
Fig
1.2.2.4
illustrates a similar arrangement to
Fig
1.2.2.2
with additional floor mounted pipe-stools isolated from the
structure by ‘waffle’ style neoprene isolation pads under the
Armstrong Suction Guide and Flo-Trex valve.
fig. 1.2.2.4
Drain connection
Suction
Guide
Neoprene
isolation
pad
System inlet
Recommended
field pressure
gauge piping
arrangement
Pipe support
Flo-trex valve
Pet cock
(typ.)
Pipe hanger
(typ.) see
specification
for size and
type
System outlet
Flush
line
2
' or
3
'
height
above
finished
floor
Hangers support the weight of the
filled piping, pumps and fittings
1.2.2.5
Floor mounted saddle supports (
fig.
1.2.2.5
) are typical for
condenser water pumps where cooling tower base is at the
mechanical room elevation.
fig. 1.2.2.5
Flo-Trex Valve
1.2.2.6
Where required, additional floor support may be used as
shown in
fig.
1.2.2.6
Note that the pump should not be rigidly
attached to the column. Leave a small gap between pump and
Summary of Contents for Design Envelope 4300
Page 2: ......
