KIRLOSKAR i-HT, Инструкция по установке, эксплуатации и обслуживанию

Страница: 13 / 50

IOM/i_HT Issue Date: 26/06/2009
Page 13 of 50
Last Revision:26/10/2009
Make sure that all piping joints are air tight. Provide pipe expansions bellows when hot
fluids are to be pumped. Where reducers are used, eccentric reducers are to be fitted in
suction lines and straight taper reducers in discharge and vertical lines (See Fig.5).
Misuse of reducers may cause the formation of air pockets in the pipe and thus
preventing the correct operation of the pump.
The suction pipe should be as short & direct as possible. Where suction lift is not very
high, it is advisable to use a foot valve. Horizontal suction line must have a gradual rise
to the pump.
The discharge pipe is usually preceded by a non-return valve or check valve and a
discharge gate valve (See Fig. 5). The check valve is to protect the pump from excessive
back pressure and reverse rotation of the unit and to prevent back flow into the pump in
case of stoppage or failure of the driver. The discharge valve is used in priming, starting
and when shutting down the pump.
4 OPERATION
4.1 Before Starting
Before initial starting of the pump, make the following inspection:
4.1.1 The unit baseplate is grouted and bolted to the foundation.
4.1.2 Alignment between pump and motor.
4.1.3 Motor is correctly wired to starting device, check voltage, phase and frequency on
motor nameplate with line circuit.
Ensure correct direction of rotation prior to coupling to pump. Check by starting motor
and switching off immediately. Observe rotation is the same as the arrow direction on
the pump casing.
4.1.4 Bearing lubrication is provided (see lubrication section), also check driver
lubrication.
4.1.5 Mechanical seal has been fitted or stuffing box has been packed.
4.1.6 All rotating parts are found to be free when turned by hand.