Pump Performance - Honeywell AUTOMATIC CONTROL Engineering Manual

Type
Circulator
Close-coupled,
end suction
Frame-mounted,
end suction
Double suction,
horizontal
split case
Horizontal split
case,
multistage
Vertical inline
Vertical
turbine
Source: ASHRAE Handbook—1996 Systems and Equipment
INBOARD
FRAME
BEARING
PUMP
SHAFT
OUTBOARD
BEARING
Fig. 52. Typical Cross-Section of an End Suction Pump.
CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS
Table 2. Characteristics of Centrifugal Pump Types.
Impeller
Type
Single
suction
Single
suction
Single
suction
Double
suction
Single
suction
Single
suction
Single
suction
CASING
OUTLET
IMPELLER
IMPELLER
RING
INLET
ROTATING
ELEMENT
MECHANICAL
SEAL
M10509
No. of
Impellers Casing
One Volute
One or two Volute
One or two Volute
One Volute
Two to five Volute
One Volute
One to twenty Diffuser

PUMP PERFORMANCE

The performance of a given pump is expressed in a curve
showing pump head in feet versus gallons per minute (gpm).
Figure 53 shows a typical curve. The head is expressed in feet (of
water column) which describes pump operation independent of
water temperature or density. Pressure losses in piping and
components used in HVAC systems are always calculated in feet.
Fig. 53. Typical Pump Head Capacity Curve.
339 ENGINEERING MANUAL OF AUTOMATIC CONTROL
Motor
Motor Mounting
Connection Position
Flexible- Horizontal
coupled
Close- Horizontal
coupled
Flexible- Horizontal
coupled
Flexible- Horizontal
coupled
Flexible- Horizontal
coupled
Flexible- or Vertical
close-
coupled
Flexible- Vertical
coupled
FLOW INC
C2907