Vertical multistage stainless steel centrifugal pump start-up, operation and maintenance

1, vertical stainless steel multistage centrifugal pumps must be filled with water ( Or be transported liquid) To start

'in the flow backward system to pump water:

close the pump outlet valve, open the pump head screw, slowly open the inlet valve, until the water poured out of the exhaust screw plug of stability and then tighten vent screw. Fully open suction check valve in the line.

'in the case of open pages in the system below the pump to pump water:

note: suction piping must install a check valve

close the pump outlet valve, open the stents or sealing seat screw, through the liquid injection pump, screw blocking until completely filled with water pump and inlet line, screw in screw up again.

before the pump is not filled with liquid and gas completely emptying, can not start the pump! Pay attention to the vent screw plug vent hole direction, ensure the overflow water don't hurt people, also do not harm the pump and other components. In hot water applications, hot don't have to be careful, in order to avoid the danger of burns!

2, check the rotation direction on the power, the direction of rotation ( The motor fan) , the correct rotation direction should be as shown in the water pump head arrow, namely, when looking from the motor driven pump to rotate counterclockwise.

3, before start the vertical stainless steel multistage centrifugal pump should check low check anchor bolt has tightened; Low pump is full of water; Low power grid voltage is correct; Low rotation direction is correct; All piping is connected closely, can normal water supply pipeline; Low pressure pipe of the valve is fully open; Export the valve should be after the pump has the ultra move slowly opened; If the installation of the pressure gauge, check the work pressure;

low all needed for the normal operation of the control. If the pump is controlled by a pressure switch, check and adjust the start and disconnect the pressure. Through the pressure switch to check the motor full load current shall not exceed the maximum allowable current.

4, vertical multistage centrifugal pump stainless steel pump can't start the start times too often. Suggest motor power 4 kw or less, and no more than 100 times per hour start; The motor power > 4 kw start no more than 20 times per hour. If it is found that starting too often; Must adjust control equipment and reduce the start-stop frequency. At this point it is necessary to check the installation conditions.

5, vertical stainless steel multistage centrifugal pump with reference to the use of bold curve performance range, in case the traffic is too small to produce heat and flow ambassador motor overload, etc.

6, according to this manual know installation of pump will be able to work effectively and requires little maintenance:

low mechanical seal is to adjust, sealing in the action of the contact surface of grinding block by pump fluid lubrication and cooling. ( Electric power is greater than 7. 5 kw pump replacement of mechanical seal does not need to remove the motor) 。 The sliding bearing in the low pump by the pump fluid lubrication.

7, anti-freezing measures

pump can be used in the water have taken the antifreezing measures of system. If the pump is installed in the icy place, must add a moderate amount of locust antifreeze lest pump liquid pump due to freezing damage. If there is no antifreeze, in there is a risk of possible frost pump should be shut down, when the pump stop, must drain pump and the water in the system.

8 work to regularly check the following low pump, pump and operation pressure;

low may leak; Low motor possible overheating; Low out clean/replace all filter; Low motor overload trip time; The frequency of the low and shut down automatically; When all the control operation; If you find fault, accused of 'common faults and processing methods' inspection system.

9, pump stopping for a long time, should be cleaned and properly kept.

10, pump should prevent corrosion and damage in the store.

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