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INSTALLATION
NOTICE:
BLACKMER PUMPS MUST ONLY BE INSTALLED IN
SYSTEMS DESIGNED BY QUALIFIED ENGINEERING
PERSONNEL. SYSTEM DESIGN MUST CONFORM WITH
ALL APPLICABLE REGULATIONS AND CODES AND
PROVIDE WARNING OF ALL SYSTEM HAZARDS.
NOTICE:
THIS PUMP SHALL BE INSTALLED IN ACCORDANCE
WITH THE REQUIREMENTS OF NFPA 58 ALL
APPLICABLE LOCAL, STATE AND NATIONAL
REGULATIONS.
Hazardous voltage.
Can shock, burn or
cause death.
Install, ground and wire to local and
National Electrical Code requirements.
Install an all-leg disconnect switch near
the unit motor.
Disconnect and lockout electrical power
before installation or service
Electrical supply MUST match motor
nameplate specifications.
Motors equipped with thermal protection automatically
disconnect motor electrical circuit when overload exists.
Motor can start unexpectedly and without warning.
PRE-INSTALLATION CLEANING
NOTICE:
NEW PUMPS CONTAIN RESIDUAL TEST FLUID AND
RUST INHIBITOR. IF NECESSARY, FLUSH PUMP PRIOR
TO USE.
Foreign matter entering the pump WILL cause extensive
damage. The supply tank and intake piping MUST be
cleaned and flushed prior to pump installation and operation.
LOCATION AND PIPING
Pump life and performance will be significantly reduced when
installed in an improperly designed system. Before starting
the layout and installation of the piping system, review the
following suggestions:
1. Locate the pump as near as possible to the source of
supply to avoid excessive inlet pipe friction.
2. The inlet line should be at least as large as the intake
port on the pump. It should slope downward to the pump,
and should not contain any upward loops. Eliminate
restrictions such as sharp bends; globe valves,
unnecessary elbows, and undersized strainers.
3. A strainer must be installed in the inlet line to protect the
pump from foreign matter. The strainer should be located
at least 24" (0.6m) from the pump, and have a net open
area of at least four times the area of the intake piping.
Strainers must be cleaned regularly to avoid pump
starvation.
4. The intake and discharge piping system must be free of
all leaks.
5. Expansion joints, placed at least 36" (0.9m) from the
pump, will compensate for expansion and contraction of
the pipes. Contact the flexible connector/hose
manufacturer for required maintenance/care and design
assistance in their use.
6.
Install pressure gauges in the NPT ports provided in the
pump casing to check pump performance at start up.
7. ALL piping and fittings MUST be properly supported to
prevent any piping loads from being placed on the pump.
8. Check alignment of pipes to pump to avoid strains, which
might later cause misalignment. See Figure 2. Unbolt
flanges or break union joints. Pipes should not spring
away or drop down. After pump has been in operation
for a week or two, completely recheck alignment.
Figure 2
9. The external bypass line should be 1/2" (12.7 mm)
diameter pipe and can be piped back to either the liquid
or vapor section of the tank. See Figure 3.
10. The use of a vapor return line will speed up delivery by
preventing pressure build up at the receiving tank and
reducing pressure in the supply tank.
11. Keeping the liquefied gas systems full of liquid, even
when idle, will keep the O-rings from changing shape,
shrinking or super cooling. Evaporation of liquefied gas
leaves an abrasive powder on the surface which can
cause wear to the pump, meter, and seals.
INTERNAL PUMP RELIEF VALVE AND
EXTERNAL BYPASS VALVE
NOTICE:
THE PUMP INTERNAL RELIEF VALVE IS DESIGNED TO
PROTECT THE PUMP FROM EXCESSIVE PRESSURE
AND MUST NOT BE USED AS A SYSTEM PRESSURE
CONTROL VALVE.
For ALL liquefied gas applications, install an external bypass
valve, and pipe back to the tank. DO NOT pipe the bypass
valve back to the intake line. Refer to “Relief Valve Setting &
Adjustment” section. The setting on the external bypass valve
must be at least 25 psi (1.7 bar) lower than the pump internal
relief valve setting. The valve and piping must be of
adequate size to accommodate the full flow from the pump
when the discharge line is closed.
Refer to Blackmer Bypass Valve Installation and Maintenance
Instructions for bypass valve settings and adjustments.
Figure 3
Bypass Valve
Mounting
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