The flow characteristics of a pump outlet pipe generally do not affect pump performance and reliability, with only a few exceptions. In some cases, sudden valve closure can cause excessively high pres
3. Start-up and ShutdownPreparation Before Start-up1. Manually rotate the motor fan blades. The impeller should rotate smoothly without any jamming.2. Open the inlet valve and the vent valve to fill t
Dry running of a centrifugal pump is unacceptable. Many users are terrified of this, largely due to a lack of understanding of its causes and how to handle it properly. However, brief dry running (les
Permissible Cable Length Between Frequency Converter and MotorBecause the voltage waveform output by the frequency converter is similar to a sine wave, but not a true sine wave, it contains a large nu
First, we summarized several common causes of oil leakage:1) Assembly reasons① Deformation of the oil seal after pressing due to tooling issues during press-fitting;② Damage to the lip during assembly...
2. Setting up Water Hammer Elimination Devices(1) Adopting Constant Pressure Control Technology:A PLC automatic control system is used to control the variable frequency speed regulation of the pumps,
Introduction to Water HammerWater hammer, also known as hydraulic shock, refers to the phenomenon of sudden changes in flow velocity and large pressure fluctuations during the transportation of water
Principles and Requirements for Filter SelectionFilters are small devices used to remove small amounts of solid particles from liquids, protecting the normal operation of equipment. When the fluid ent
Net Positive Suction Head (NPSH) and Suction HeadWhen a pump is operating, the liquid at the impeller inlet generates vapor under a certain vacuum pressure. The vaporized bubbles, through the impact o
What is cavitation?When the local pressure of the liquid in a pump drops to the critical pressure, bubbles will form in the liquid. Cavitation is the entire process of bubble aggregation, movement, br
Check valve, also called a non-return valve, is an automatic valve that relies on the pressure of the flowing medium in the pipeline to push the valve disc, thus closing and opening the valve. When th
1. The outer diameter of the seal ring is too loosely matched to the seal seat aperture.2. The gland is incorrectly installed, blocking the oil drain holes on the front and rear covers.3. The pump bod
Phase LossCause:This is usually caused by a power phase loss (one phase is not powered or the power supply voltage is insufficient), or by a contactor not closing in the circuit, a disconnected wire c
(1) Motor reversal Due to wiring problems, the direction of the motor may be opposite to the actual required direction of the pump. Therefore, you should first observe the direction of the pump when s
A minimum flow valve, also known as an automatic recirculation valve, is a pump protection valve installed at the outlet of a water pump. It prevents damage caused by overheating, excessive noise, ins
The factors that affect the sealing of gaskets and packings are mainly as follows:1. Surface condition of the sealing surface:The shape and surface roughness of the sealing surface have a certain infl
Mechanical seal1. Mechanical seal method and working principleMechanical seal is a filler-free end face sealing device that limits the leakage of working fluid along the rotating shaft. It is mainly c
Function of shaft seal device: Because there needs to be a certain gap between the rotor and the pump casing, a sealing device is installed at the part where the pump shaft extends out of the pump cas
What are the rules for installing pipeline valves? Do they need to meet certain installation requirements?1. When installing, pay attention to the direction of the medium flow should be consistent wit
With the development of human social productive forces, the development of regulating valves has gone through a long period of time. Nowadays, regulating valves play a very important role in the autom
Mechanical seal 1. Mechanical seal method and working principle Mechanical seal is a filler-free end face sealing device that limits the leakage of working fluid along the rotating shaft. It is main
1. Follow proper installation techniques Always follow the control valve (regulating valve) manufacturer's installation instructions and precautions. Here is a brief summary of typical installation i
The primary difference between pneumatic regulating valves and electric regulating valves lies in their actuation method: pneumatic valves use compressed air for control, while electric valves rely on
In the world of hygienic fluid handling, selecting the right pump technology is critical to ensuring product integrity, operational efficiency, and compliance with stringent sanitary standards. Among ...
