Diesel four automatic pump protection

Diesel pump is a diesel fuel supply system is an important component of its working conditions, the quality of a direct impact on the dynamic performance of diesel engines, economy and reliability. Now that the four kinds of automatic diesel engine pump protection. Diesel engine pump diesel pump automatic protection 1, start the protection: If the unit failed to start three times, the output failed to start the signal and lock the automatic work system. Buzzer alarm, alarm light flashes, press the silence button silencer, the sound alarm disappears, the alarm indicator light into flat instructions. 2, speeding protection: diesel engine pump in operation, if the speed of ≥ 1750rpm (10% of rated speed) failure, immediately issued a sound and light alarm, buzzer alarm, alarm light flashes, press the silencer button silencer, Alarm indicator to flat light instructions. At the same time diesel engine speed down and immediately shut down. 3, high water temperature protection: diesel engine pump operation, if the water temperature ≥ 95 ℃ failure, the buzzer alarm immediately, the alarm light flashes, press the mute button silencer, the sound alarm disappears, the alarm indicator into flat light instructions. At the same time diesel engine speed, delay 3 minutes after the shutdown. 4, low oil pressure protection: During the operation of the unit, if the oil pressure ≤ 0.2Mpa failure, immediately issued a sound and light alarm, buzzer alarm, alarm lights flashing, press the mute button silencer, the sound alarm disappears, the alarm indicator Change to flat light instructions. At the same time diesel engine speed down and immediately shut down. Further Reading: pump valve pipe fittings Exhibition Water Expo Xiamen exhibition of marine equipment Internet + Forum Yiwu Fair 2016 exhibition mold top ten brands of the Internet information industry (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / WeChat:) http://beng.liuti.cn/ (Service Hotline:)

Elevator Door System

Elevator doors have two major types, manual and automatic. Manual doors are normally opened and closed manually by hand, and automatic doors are the standard type of doors found in modern days elevators, usually powered by a door operator.


Non-automatic/manual doors


These doors are normally opened or closed manually using hands, although some of them close automatically. Most older and small European elevators from the 1950's to 1970's are using manual hinged door (similar to normal room doors), while the inside has a manual sliding scissor gate or often there is no door at all. For manual doors, sometimes the door can be spring loaded so the gate can't be left open, or the gate can automatically close when you press the button, and partly/completely close when the elevator gets to a floor. The inside door can also be a tubular gate, which is a gate that in many cases folds around the side of the cab when it is open (often called a barred gate by elevator enthusiasts, though this is likely not the actual term), and which can be automatic or manual.

These type of door is still used today, normally for smaller wheelchair lifts or home elevators. Some older freight elevators may have a horizontal or vertical manual doors. In some Asian countries, one may find an old freight elevators with manual accordion or scissor gate. Some old elevators may have a semi-manual doors a configuration of manual door outside and an automatic door inside.

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Automatic doors


Automatic doors are the standard type of doors found in modern days elevators which was introduced in 1887. Almost all the automatic doors are usually powered by a door operator installed on the elevator car. Those except manual door with automatic door opening/closing device and all the incline elevators with every independent door operator belongs with every single shaft doors and car doors.
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