Install the suction and dischar
ge flanges on the pipe ends
using teflon tape sealer or high quality thread sealant. Minimize
strain on the pump by supporting the suction and discharge
piping with pipe hangers near the pump. Line up the vertical
and horizontal piping so that the bolt-holes in both the pump
and pipe flanges are aligned. DO NOT ATTEMPT TO SPRING
THE SUCTION OR DISCHARGE LINES INTO POSITION. THIS
MAY RESULT IN UNWANTED STRESS IN THE PUMP BODY,
FLANGE CONNECTIONS AND/OR PIPING. The code for pres-
sure piping, ANSI B31.1, lists types of supports available for
various applications.
Ordinary wire or band hangers are not adequate to maintain
alignment. It is very important to provide strong, rigid support
for the suction and discharge lines.
New Bell & Gossett flange gaskets must be installed between
the flanges of the pump body and suction and discharge
pipes. The gaskets should be clean and grease-free; old gas-
kets should never be reused. Suitable fasteners for this con-
nection are supplied in the Bell & Gossett fastener pack. Apply
a torque of 8-11 ft. lbs. to each of the flange bolts. Both the
suction and discharge flanges must be torqued to the same
level.
PUMP
LOCATION
PUMP SUPPORT AND LOCATION
The Bell &
Gossett Series 90 Pump should be installed where
there will be sufficient room for future inspection, maintenance
and service. It is highly recommended that service valves
(shut-off) also be installed on each side of the pump to facili-
tate servicing or replacing without draining the system. Special
precautions should be taken to avoid sound and vibration
transmission. If the pump is to be located near a noise sensi-
tive area, consult a sound specialist.
If it is required to lift the entire pump, do so with slings placed
around the pump assembly as shown.
IMPOR
TANT
:
In closed systems, do not install and operate
Bell & Gossett pumps, 3D valves, suction diffusers, etc., with-
out properly sized safety and control devices. Such devices
include properly sized and located pressure relief valves, com-
pression tanks and pressure, temperature, and flow controls. If
the system is not equipped with these devices, consult the
responsible engineer or architect before operating.
MODE
OF DISCHARGE
Bell &
Gossett Series 90 In-Line Pumps may be installed to
discharge vertically or horizontally. THE ARROW ON THE
PUMP BODY MUST POINT IN THE DIRECTION OF THE
FLOW.
The pump may be installed with the motor vertical or horizon-
tal. Do not install with the motor below the pump body.
SYSTEM
PIPING
Always install a section of straight pipe between the suction
side of the pump and the first elbow. The length of this pipe
should be equal to five times the diameter of the suction pipe
size. This reduces turbulence of the suction by straightening
the liquid flow path prior to pump entry.
Air must be kept out of the system. On an open system always
place the end of the suction pipe at least three feet (3') below
the surface of the water in the suction well to prevent air from
being drawn into the pump. Avoid air pockets in the suction
line and ensure that each section of the suction pipe is
absolutely air tight.
If high temperature variation is anticipated, expansion fittings
should be installed such that they reduce pump strain.
3
W
ARNING: HOT WATER LEAKAGE HAZARD
Make certain that the flange bolts have been ade
-
quately torqued. Failure to follow these instructions could
result in serious personal injury and/or property damage.
PIPING
SCHEMATIC EXAMPLE
