User Manual
7
3. INSTALLATION AND LIFTING
1) Use the sling, which located under the pump body and motor and around them, to lift
the pump assembly, if pump assembly is outside the pump tank.
2) Only can use the two ringbolts or lifting lugs on the head cover of pump tank to lift the
pump assembly, if the pump assembly had been installed in the vacuum pump tank,
and forbid to lift with slings around the pump tank.
4. PIPING
The surfaces of pump connected with pipe flange must be parallel, install them effortlessly,
flange bolt holes must be completely alignment. After completion, place spacers between the
two flanges and butt them up.
5. CIRCUIT CONNECTION
1) Before pump body putted into vacuum pump tank, tree wires of connector sealing
tube at the cover of vacuum pump tank and the motor should be arranged with clamp
connection. In order to achieve the effect of sealing and insulation, using heat
shrinkable tube respectively to heat the connecting three conductors, which
connected well(Refer to Appendix
Ⅰ
: Instructions for use accessories).
2) After pump body installed in the vacuum pump tank, connect the tube of
frequency converter and three conductors from the other side of sealing tube with
the same method, and enclose them by a heat shrinkable tube.
NOTE!
Confirm the motor is connected with the power supply conform to the voltage value
on the nameplate. In order to make the motor can deliver sufficient electric current, the
cross-sectional area of power outgoing wire shall be not less than 6mm
2
.
6. SAFETY INERT DISPOSAL
1) For the pump assembly apply to pumped LNG or LN
2
, its essential to remove all
oxygenated substances including air through safe inert disposal for the entire
equipment particularly the pump tank and the pump motor unit.
2) Oxygen and natural gas can form an explosive mixture that can be ignited, for
example, by a spark of shorting electric motor wire. Without oxygen, whatever
electric motor conveying LNG works safely under any circumstance.
7. OTHER INSTALLATION NOTES
1) During pipeline installation, the pump prone to deformation or displacement because