A lobe-style positive displacement pump that has run reliably for months can start showing subtle changes: the flow rate drops a few percent against the same back pressure, the gearbox runs warmer to
A flow control unit that performs flawlessly in an industrial water line can become a contamination risk the moment it is installed in a dairy, pharmaceutical, or cosmetics facility. The difference is
In bioprocessing facilities, the selection of fluid handling components is driven by the need to maintain a validated state of control. When an aseptic process requires the transfer of media, buffer,
A stainless steel valve body marked "316L" meets the minimum requirements of the grade, but not all 316L castings or forgings deliver the same performance across years of exposure to hot water for inj
A filling line that surges and starves. A pasteurizer that overshoots its setpoint by several degrees, then drops back. A bioreactor whose nutrient feed swings with every bump in line pressure. These
A recurring scenario in process engineering goes like this: a line needs automated flow control, so someone specifies an on/off pneumatic valve with a positioner, expecting proportional performance. T
In beverage plants running multiple products across shared lines, the real capacity bottleneck is often hidden not in the filler speed or tank size, but in the valve cluster where product paths inters
A few years ago, many food and beverage manufacturers viewed cleaning operations as a necessary interruption to production. Today, the situation is very different. Rising production demands, stricter
Top 10 Causes of Centrifugal Pump Vibration — Pump Selection and Variable Operating ConditionsEvery pump possesses its own rated operating point; the degree to which actual operating conditions align ...
Top 10 Causes of Centrifugal Pump Vibration — The ShaftFor pumps with very long shafts, issues such as insufficient shaft stiffness, excessive deflection, or poor shaft train straightness are prone to...
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
