Round damper - The electrically - driven vented disc valve is a type of valve that uses a circular door plate as the opening and closing element and rotates with the valve shaft to achieve full opening and closing. The round damper mainly serves to regulate the flow of the medium, pressure, and cut off the passage in the pipeline. Large high-temperature dampers are generally used for smoke ducts and gas pipelines. Widely used in power, hydraulic, petroleum, chemical, mining and other departments.
Second, characteristics
1Convenient and rapid, fluid resistance is small, and it can be operated frequently.
2 the structure is simple, small size, light weight, easy maintenance
3 It is possible to send mud slurry to the bottom of the pipeline to collect less liquid.
4) Under low pressure, good sealing performance can be achieved.
Third, the structure of circular throttle transmission is divided into manual, electric, pneumatic. 
The structure of the circular shutter is divided into vertical plate type and inclined plate type. Most of the small flaps used cast iron processing, large-scale high-temperature dampers are generally processed after the use of steel plate welding. The circular damper is mainly composed of shells, door plates, end shaft shaft seals and other small shells. The door plates are made of cast iron. The large shells are made of steel plate welded and processed to form the door plate. There is a shaft hole at both ends of the door plate. When the shaft is inserted into the hole, drill the hinge pin hole with the shaft hole of the door plate and connect it with the positioning taper pin. The end shaft uses 35 steel. One end of the main shaft is journalled with packing and the other end of the shaft is closed with a cover. The protruding part of the shell of the butterfly valve and the head of the axle head are generally square. The worm gear box is installed or the direct connection of the electric device is installed. If the connecting rod is used to push the axle head to directly assemble the crank.
Water spraying truck (also called water sprinkler truck, mobile Water Truck, watering truck, Water Bowser, water truck tanker, water carrying truck, water tank for truck, water distribution truck) is used to transport and supply water, whatever industrial or agriculture water, widely used in construction engineering, farm irrigation, draught relief, etc.
With non-toxic treatment inside tank or tank made of stainless steel, the water tank truck can be suitable for transporting drinking water, called as potable water tanker, drinking water tanker, stainless steel water tanker, agua potavel, safe to human body.
Water tanker can also be equipped with special sprayers to achieve front flush, rear sprinkle, side spray, to sprinkle and clean the roads, streeets for environmental sanitation and protection, called as water sprinkler, water spray truck.
With rear working platform and high cannon, the Water lorry can also be used to water the plants, even high trees in virescence, called as watering truck.
Water bowser can be also equipped with pesticide spraying machine, to be used to spray pesticide in agriculture pest control field.
Water Bowser,Water Delivery Truck,Water Transport Truck,Water Tanker Truck
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