Methods for detecting leaks in self - piping pump pipelines

Self-suction pump pipe leakage will lead to suction is not on the water (self-absorption height of less than), and even lead to pump flow is not enough and the head is not enough. In short a sentence: If the self-suction pump pipe leakage will lead to changes in the parameters of the pump, then the detection of self-suction pump pipe leak is the most important thing when we install the pump, the following we usually check the method Give you some of the list, I hope to help customers.

(1) duck hair method: with a duck down, in the pump running close to the suspected air intake, observe the duck fluttering situation. Similarly, the use of lit cigarettes can be operated by this method. Through the ducks and flue gas fluttering direction to help find.

(2) oil method: the difficult to identify the intake point, can be determined in the intake part of the air coated with a little oil, oil was quickly sucked away that is the air intake.
2, to prevent self-priming centrifugal pump intake measures

(1) Self-priming pump should be installed as close as possible to the surface, to ensure that the water level is not absorbed into the air.

(2) When installing the suction pipe, the inlet horizontal pipe should be tilted down or horizontally in the direction of the water, and the inlet pipe should not be higher than the pump inlet at any point, otherwise the air in the pipe will be excluded.

(3) to prevent packing gas leakage. Packing hopper should be appropriate, if too loose, should be tightened packing gland; packing damage, failure, should be replaced; packing cover water pipe plug and heat, will cause packing cover leakage, should clean water seal The

(4) with the flange connected to the water pipe installed before the two flanges to contact the plane clean and clean, the middle plus a 3 ~ 5mm thick pad, to be symmetrical, several times to gradually bolts tighten The

(5) self-suction pump bottom valve to have enough submerged depth, from the valve plane flood depth should be equal to the bottom valve diameter of 1.5 to 2 times, at least not less than 0.5m. If submerged too shallow, easy to form a vortex, which sucked into the air, resulting in cavitation and damage to the impeller and pump shell. If you find the pump running into the water level down quickly, you can put a few pieces of wood on the surface to reduce the vortex, to prevent air into the pump shell.check out best submersible Water pumps

(6) self-priming pump body with a gas plug, in order to facilitate the gas, the same thread can be used in place of the same type of faucet plug, bleed open the faucet can be.

(7) suction pump suction port at the degree of vacuum is limited, the vacuum is too large, easy to pump water vaporization, self-absorption pump work disadvantage. Therefore, the respective suction pump has its maximum allowable suction, generally between 3 ~ 8.5m, the installation should be controlled in this range.

(8) pay attention to exhaust. Before starting the self-priming pump should be enough water to exclude the air from the suction pump; usually should be regularly open the pump cover on the air plug, remove the accumulation of air inside