Case
Super calender is one of press polishing equipment in paper making. Its shape is similar to calender with a larger number rollers. The super calendar applies to coated paper, enamel paper, writing paper, offset printing paper and other cultural paper and insulation paper such as capacitor paper.
Water supply application is very popular in Europe. In this case, constant pressure control is very important, the target of a pressure control system is to provide a variable flow with a constant pressure for the water system of an apartment building, machine refrigeration systems, mixing liquids in chemical industry, etc. PID control is needed in the constant pressure water supply applications. Winston can provide advanced software features to support different VFD series to be suitable for those water supply applications.
Keywords: PID control, Wst800 , Constant pressure control, Water supply, etc.
Keywords: PID control, Wst800 , Constant pressure control, Water supply, etc.
Floor grinding machine is a multi-function equipment which integrates various processes such as fast sealing curing agent floor, hardening floor, epoxy floor treatment, stone renovation, concrete leveling, sanding and polishing. Its design concept is based on the extension of stone processing machinery, the main feature is slagging, leveling, grinding and polishing for concrete, cement and ground stone. The machine is easy to operate and one single worker can easily handle, which is essential equipment for modern floor sanding.
A plastic bag making machine is made up of thermal sealing cutter, servo unit, frequency inverter, traction roller, bearing roller and controller. Its main technical feature is as follows: The thermal sealing cutter is mounted on the transmission shaft, which is driven by frequency inverter to move reciprocally upwards and downwards. The servo unit drives the traction roller at a certain speed and ensures the thermal sealing cutter to send the plastic bag of set length over the cutter before it leaves bearing roller and arrives at the bearing roller again. After that, the thermal sealing cutter arrives at bearing roller, seals the plastic bag and cuts it off.
The structure of oil-field direct-driven screw pump is simple, which is made up of synchronous motor, screw pump and speed regulation and control system. It is suitable for crude oil extraction of highly viscous and low-output rate oil wells containing high content of gas, sand and water. It has the advantage to effectively overcome problem of gas locking and sand check. Occupying a small land area, its efficiency is high, it improves productivity and saves energy.
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