This regulation stipulates the safe operation content and requirements of the plate-type heat exchanger for extraction and electrowinning. This procedure is applicable to the work of extraction and electrowinning plate heat exchangers in the wet smelting workshop. 2 content 1. Before going to work, you must wear protective helmets, overalls, protective shoes, protective gloves, protective glasses and other labor insurance products. Check if the pipeline connection meets the requirements before starting, and if the drain (sewage) valve is closed. After running slowly, open the inlet and outlet valves of the cold medium and then slowly open the inlet and outlet valves of the heat medium, all of which should be slowly boosted and warmed up. In order to stabilize the system operation, the amount of fluid on both sides can be adjusted synchronously (if there is an intermediate partition, both sides of the partition should be included). 2, must be very carefully exhausted when filling the liquid. According to the indication of inlet and outlet pressure and temperature, adjust the valve to the set process parameters. 3. During the operation, the pressure should be stable to avoid high and low. Carefully observe the operation of the heat exchanger. Such as (temperature, pressure, outward leakage, etc.) 4. In the course of operation, if there is a slight leak, the compression size can be reduced by 2~3mm in the state of pressure relief before running. 5. Stop the heat medium inlet valve first, then close the cold medium inlet valve, all valves Closing should be done quickly. If the machine is out of service for a long time, the valve at the lowest point of the pipe should be opened to drain the residual liquid in the equipment. 6. If leaks, leaks, and liquids are found, they should be reported and disposed of in time. 7. The operator should wear gloves to prevent scratches. Be careful not to scratch the gasket when removing the plate. When boosting, the air inside the equipment should be discharged first. The overpressure test should not be carried out. It is forbidden to tighten the bolt when there is pressure in the equipment. 8. Mechanical cleaning and chemical cleaning should be carried out as required. 9. When working with heat exchangers or steam systems, care should be taken to prevent steam burns. 10. Strictly abide by the system of stopping the operation of water, steam, wind and electricity.
All windshield wiper arms have a hinge at the base that allows the arm to flex as it follows the curvature of the window. If the wiper skips over certain spots, even with a new blade, chances are the hinge is binding from corrosion. It`s most common on rear window wipers since they`re used less often.
You can oil the hinge, but that`s just a temporary fix-the corrosion and binding usually return. To fix the problem permanently, replace the wiper arm (available at an auto parts store).
Now you`re ready to get started!
Plug-In Wiper Arm,Rear Window Wiper Arm ,Rear Windscreen Wiper Arm,Front Wiper Arm COMOTECH ASIA PACIFIC (HANGZHOU)CO.,LTD , https://www.capwiper.com
Is it Time to Change Your Windshield Wiper Arm?
What you`ll need to replace your windshield wiper arm:
　　 1 Scope