ITT G&L Pumps NPE Manual De Instrucciones

Installation, Operation and
Maintenance Instructions
Model NPE/
NPE-F
DESCRIPTION & SPECIFICATIONS:
The Models NPE (close-coupled) and NPE-F (frame-mounted) are
end suction, single stage centrifugal pumps for general liquid
transfer service, booster applications, etc. Liquid-end construction is
all AISI Type 316 stainless steel, stamped and welded. Impellers are
fully enclosed, non-trimable to intermediate diameters. Casings are
fitted with a diffuser for efficiency and for negligible radial shaft
loading.
Close-coupled units have NEMA 48J or 56J motors with C-face
mounting and threaded shaft extension. Frame-mounted units can
be coupled to motors through a spacer coupling, or belt driven.
1. Important:
1.1. Inspect unit for damage. Report any damage to carrier/dealer
immediately.
1.2. Electrical supply must be a separate branch circuit with fuses or
circuit breakers, wire sizes, etc., per National and Local electrical
codes. Install an all-leg disconnect switch near pump.
CAUTION
Always disconnect electrical power when handling pump or
controls.
1.3. Motors must be wired for proper voltage. Motor wiring
diagram is on motor nameplate. Wire size must limit maximum
voltage drop to 10% of nameplate voltage at motor terminals, or
motor life and pump performance will be lowered.
1.4. Always use horsepower-rated switches, contactor and starters.
1.5. Motor Protection
1.5.1. Single-phase: Thermal protection for single-phase units
is sometimes built in (check nameplate). If no built-in
protection is provided, use a contactor with a proper overload.
Fusing is permissible.
1.5.2. Three-phase: Provide three-leg protection with properly
sized magnetic starter and thermal overloads.
1.6. Maximum Operating Limits:
Liquid Temperature: 212º F (100º C) with standard seal.
250º F (120º C) with optional high
temp seal.
Pressure: 75 PSI.
Starts Per Hour: 20, evenly distributed.
1.7. Regular inspection and maintenance will increase service life.
Base schedule on operating time. Refer to Section 8.
IM013R06
2. Installation:
2.1. General
2.1.1. Locate pump as near liquid source as possible (below
level of liquid for automatic operation).
2.1.2. Protect from freezing or flooding.
2.1.3. Allow adequate space for servicing and ventilation.
2.1.4. All piping must be supported independently of the
pump, and must "line-up" naturally.
CAUTION
Never draw piping into place by forcing the pump suction and
discharge connections.
2.1.5. Avoid unnecessary fittings. Select sizes to keep friction
losses to a minimum.
2.2. Close-Coupled Units:
2.2.1. Units may be installed horizontally, inclined or vertically.
CAUTION
Do not install with motor below pump. Any leakage or
condensation will affect the motor.
2.2.2. Foundation must be flat and substantial to eliminate
strain when tightening bolts. Use rubber mounts to minimize
noise and vibration.
2.2.3. Tighten motor hold-down bolts before connecting
piping to pump.
2.3. Frame-Mounted Units:
2.3.1. It is recommended that the bedplate be grouted to a
foundation with solid footing. Refer to Fig.1.
(1/4")
Finished grouting
(1/2 to 3/4")
Allowance
for leveling
Wood
frame
Grout hole Base
Grout
Leveling wedges or shims—left in place
Top of foundation—
clean and wet down
Sleeve
Washer
Lug
Figure 1
1