Fault analysis of electric reciprocating pump

Electric reciprocating pump failure in the work is to avoid the thing, the main reason is that the electric reciprocating pump is too old, or the continuous use of time is too long. Now small make up to introduce some of the electric reciprocating pump failure analysis method.
Fault analysis of electric reciprocating pump
(1) after the pump can not be used for liquid:
Lax or liner, too much wear 1 ring packing, bakelite expansion or stuck stem ring;
2 valve box in the suction and discharge valve damage or serious leakage, put up;
3 suction pipe leakage;
4 suction mouth exposed level;
5 suction tube obstruction (filter blockage or cut-off valve closed);
6 pump suction is too large, or pipeline resistance is too large;
7 oil when the oil temperature is too low, the viscosity is too large;
Fault analysis of electric reciprocating pump
8 the temperature of the liquid is too high;
The 9 discharge end somewhere (bypass valve leakage or spring loose);
10 discharge line blocking and safety valve opening.
(2) pump abnormal sound:
1 pump cylinder knocking of the cylinder may fall into objects or piston fixed nut loosening;
The 2 cylinder friction sound, may be packed tight or piston ring fracture;
3 the percussion sound in the valve box may be insufficient for spring break or elastic force, so that the valve lift is too large;
4 transmission parts clearance is too large;
A 5 pump cylinder may also be "liquid hammer", then inevitably associated with suction vacuum through the large and obvious characteristics such as pressure gauge pointer swing, see reason (L) in 5 ~ eight.