Teikoku USA | Chempump
Instruction Manual HE-10677-P (1018)
5
2. Installation
2.1 Receipt Inspection
1. Visually inspect the shipping container for evidence of dam-
age during shipment.
2. Check unit to see that suction, discharge, and any other con-
nections are covered.
3. Inspect the suction, discharge and any other connections gas-
ket seating 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 papers.
5. Verify receipt of the reverse circulation line restriction orifice.
2.1.1 Storage Note
In situations where a Teikoku Type-R (Plan 13-SE) 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, suction and discharge flange, and any other
openings must be sealed to prevent moisture from entering the
internals of the pump. Teikoku's long term storage procedures are
available upon request.
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.
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 impose 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 liquid supply with a
positive suction head. Location of the pump and arrangement
of the system should be such that sufficient NPSH (Net Positive
Suction Head) is provided over vapor pressure of the liquid at the
pump inlet. NPSH requirements at the design point are stated on
the pump order data sheet.
NOTE:
Experience has proven that most pump troubles result
from poor suction conditions including insufficient NPSH. The
suction line must have as few pressure drops as possible and avail-
able 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 satisfac-
tory operation. NPSH can be tailored by changes in the piping, in
liquid supply level, and by several other methods. Refer to
.
2.2.2 Mounting and Alignment
Base plate assemblies 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 a Teikoku Type-R (Plan 13-SE).
Be sure that the suction and discharge piping is properly aligned so
that no strain is placed on the pump casing by out-of-line piping.
2.2.3 Piping Data
Observe the standards of the Hydraulic Institute and International
Institute of Ammonia Refrigeration when sizing and making up
suction and discharge piping. Follow these procedures:
1. Remove burrs and sharp edges when making up joints.
2. When using flanged joints, be sure inside diameters match
properly. When gasketing flanged joints, do not cut flow hole
smaller than flange opening.
3. Use pipe hangers or supports at necessary intervals.
4. Provide for pipe expansion when required by liquid
temperature.
5. When welding joints, avoid possibility of welding shot entering
the suction or discharge line, and thereby entering the pump.
Caution!
Do not weld pipe when it is connected to pump.
6. Do not spring piping when making up any connections.
7. Make suction piping as straight as possible, avoiding unneces-
sary elbows. Where necessary, use 45-degree or long-sweep
90-degree fittings.
8. Make suction piping short, direct, and never smaller in diam-
eter than suction opening of pump. Suction piping should
be equal to or larger than pump suction port, depending on
pipe length.
9. Ensure that all joints in suction piping are airtight.
10. When installing valves and other fittings, position them to
avoid formation of air pockets.
11. Permanently mounted suction filters are not recommended.
It is extremely important to design and size the suction system to
minimize pressure losses and to be sure that the pump will not be
starved for liquid during operation. NPSH problems are a result of
improper suction systems.
The suction pipe should be one or two sizes larger than pump
suction port, depending on piping length. Use the largest pipe
size practical on suction piping and keep piping short and free
from elbows, tees or other sources of pressure drop.
If elbows, tees or valves must be used, locate them from 5 to 10
pipe diameters upstream from suction. When reducing to pump
suction port diameter, use eccentric reducers with flat side on top
to avoid air pockets.
