Bell & Gossett P5002169C Series VSCS - Manual (Page 3)

1
INTRODUCTION
DESCRIPTION
The Series VSX centrifugal pumps are frame-
mounted pumps that feature high efficiency,
rugged construction, compact design, foot-
mounted volute, alignment-friendly coupling, and
unitized seals. These features, along with the
vertically split case make installation, operation,
and service easy to perform.
PUMP APPLICATION
The standard Series VSX centrifugal pump’s
bronze fitted construction makes it ideal for service
with the following liquids: hydronic cooling or
heating, boiler feed water, condensate, pressure
boosting, general pumping, unheated domestic
and fresh water, and benign liquids.
For other applications contact your local Bell &
Gossett representative.
OPERATIONAL LIMITS
Unless special provisions have been made for
your pump by Bell & Gossett, the operational limits
for Series VSX pumps are as follows:
Maximum Suction Pressure
Table 1 shows the maximum suction
pressures allowed for pump size and seal
type:
Table 1: Maximum Suction Pressures
Unitized Seal Balanced Seal
2” Seal Sizes
4x6x10.5
5x6x10.5
5x6x13.5
6x8x10.5
6x8x13.5
8x10x10.5
175 psi 300 psi
2.5” Seal Sizes
8x10x13.5
10x12x10.5
10x12x13.5
175 psi 300 psi
3” Seal Sizes
12x14x13.5
14x16x13.5 160 psi 300 psi
3.5” Seal Sizes
12x14x17.5
125 psi 300 psi
Maximum Working Pressure
Listed on pump nameplate.
SEAL OPERATING LIMITS
Mechanical Seals
NOTE: For use on closed or open systems
that are relatively free of dirt and/or other
abrasive particles.
Unitized EPR/Car/SiC: 0 ° F to 300 ° F
Temperature range; 6.5 to 8.5 pH range
Unitized Viton/Car/SiC: 0 ° F to 225 ° F
Temperature range; 6.5 to 8.5 pH range
Unitized EPR/Graphite Loaded SiC: 0 ° F to
300 ° F Temperature range; 7 to 12.5 pH range
Balanced EPR/Graphite Loaded SiC: 0 ° F to
300 ° F Temperature range; 7 to 12.5 pH range
Balanced Viton/Graphite Loaded SiC: 0 ° F to
225 ° F Temperature range; 7 to 12.5 pH range
CAUTION: Equipment Damage
To prevent premature seal failure or possible
injury, the unitized seals should not be used as an
alternate or substitute for the balanced seals
installed in a high suction pressure rated VSX
pump.
Failure to follow these instructions could result in
serious property damage and/or moderate
personal injury.
Packing
NOTE: For use on open or closed systems
that require a large amount of makeup water,
as well as systems that are subjected to
widely varying chemical conditions and solids
buildup.
Braided Graphite PTFE:
0°F to 200°F Temperature range; 7 to 9 pH
range