Teikoku DynaPump LE Series, Instruction Manual

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Page 4
SECTION 2. Installation
2-1. Receipt Inspection
1. Visually inspect the shipping container for evi-
dence of damage during shipment.
2. Check unit to see that suction, discharge and
any other connections are sealed.
3. Inspect the suction and discharge gasket seat-
ing surface to be certain that they are clean of
foreign matter and free from nicks, gouges and
scratches.
4. Check all nameplate data against shipping pa-
pers.
2-1.1. Storage Note
In situations where a Dynapump LE Series is to be
stored for a period of time prior to installation and
where the climate experiences wide temperature
changes and high humidity, the terminal box, suc-
tion and discharge flange, and any other openings
must be sealed to prevent moisture from entering
the internals of the pump.
2-2. Structural
The pump design and construction eliminates the
necessity of aligning the pump and motor. The pump
should be supported from the mountings provided.
It should be mounted in such a way as to have its
weight properly supported. Suction and discharge
piping must be properly supported and aligned so
that no strain is placed on the pump casing.
General
1. Remove burrs and sharp edges from flanges
when making up joints.
2. When connecting flanged joints, be sure inside
diameters match within 1/16" so as not to im-
pose a strain on the pump casing.
3. Use pipe hangers or supports at intervals as
necessary.
2-2.1. Pump Location
Locate the pump as close as possible to the fluid
supply with a positive suction head. Installations with
suction lift are possible but not recommended.
Location of the pump and arrangement of the sys-
tem should be such that sufficient NPSH (Net Posi-
tive Suction Head) is provided over vapor pressure
of the fluid at the pump inlet. NPSH requirements at
the design point are stated on the pump order data
sheet. For additional design points, refer to the cor-
responding performance curves located in the Ap-
pendix of this manual.
NOTE
Experience has proven that most pump
troubles result from poor suction condi-
tions including insufficient NPSH. The suc-
tion line must have as few pressure drops
as possible and available NPSH MUST be
greater than required NPSH.
Depending on job conditions, available NPSH can
sometimes be increased to meet the NPSH required
by the pump for satisfactory operation. NPSH can be
“tailored” by changes in the piping, in liquid supply
level, by pressurizing the suction vessel and by sev-
eral other methods. Refer to Table 2-2, Page 8,
Trouble Shooting.
2-2.2. Mounting and Alignment
The Dynapump LE Series combines a pump and
motor in a single hermetically sealed unit. No te-
dious coupling alignment is required because the
pump has no external coupling between pump and
motor. All models can be mounted in any position.
For mounting with discharge on the side or in any
other position other than top discharge, please con-
tact the factory. Modifications must be made to the
standard internal venting arrangement and hydrau-
lic thrust balance system.
Base cradles are offered on all models. Simply set
the pump on a foundation strong enough to support
its weight. There is no need to bolt down or grout in a
Dynapump LE Series. All Dynapump LE Series mod-
els are provided with a specially made base de-
signed to mount on a standard ANSI base plate to
facilitate inspection and repair.
Be sure that the suction and discharge piping is prop-
erly aligned so that no strain is placed on the pump
casing by out-of-line piping.