Armstrong 4380 Installation And Operating Instructions Manual page 7

column or install a 'waffle' isolation pad under the pump. It is
critical that piping be installed in such a manner that the pump
does not become a pipe support.
fig . 1. 2 . 2 .6
Isolation Pads
1. 2 . 2 .7
fig. 1. 2 . 2 .7 illustrates installations with stanchion plates for
seismically active regions. Seismically rated isolation pads
or snubbers with bolts isolated from the stanchion plates are
installed to restrain the pump during a seismic event. Pipe
hangers carry the weight of the equipment as seismic com-
ponents are designed only to restrain the equipment during a
seismic event.
fig . 1. 2 . 2 .7
Seismically rated snubbers or pads and
conrete foundation
Design Envelope 4300 & 4380
Vertical In-line Pumping Unit
1. 2 . 2 . 8
Many Vertical In-Line pumps are piped successfully into
grooved piping systems. In-line pumps are supported well by
grooved piping however flange adapter locking devices or a
welded flange at the pump should be used to prevent the pos-
sibility of pipe mounted pumps rotating in the piping. Armstrong
offers grooved suction guides with cast-in outlet flanges and
Flo-Trex valves with Armgrip™ fittings to prevent this possibility.
fig . 1. 2 . 2 . 8
Stanchion Plates
Recommended field
pressure gauge
piping arrangement
Suction guide
Drain connection
1. 2 . 2 .9
Connecting the pump to a permanent rigid base (fig. 1. 2 . 2 .9)
is not recommended unless isolated from the piping by flexible
connectors and the base isolated from the building structure
on an inertia base. (fig. 1. 2 . 2 .9 is generally acceptable when
using plastic piping).
fig . 1. 2 . 2 .9
Stanchion plates
Hangers support the weight of the
filled piping, pumps and fittings
System inlet
7700 butterfly
valve
insta l l a t io n &
o per at ing i n str uct io n s
Pipe hanger
(typ.) See
specification for
size and type
System outlet
Gruvlok 7000 flex
coupling (typ.)
Flush
line
Flo-Trex valve
Pet cock
(typ.)
7