The LED Floodlight is widely used at Garden, Park outside of shopping mall and so on.
The advantages for DiLin LED Floodlight
1. Fashion design with high quality of aluminum housing and constuction to make sure the cooling of LED Floodlight good enough.
2. Private module with high quality of COB & SMD CHIP and driver solution to make sure LED Floodlight quality stable enough.
3. Strong Engineer & QC team are good at customizing and offer flexible solution for competitive Floodlight.
4. Fast lead time: 5-7days for samples and 15-25days for bulk order.
5. 3 or 5 year warranty with standardized after-sale serivce process.
Led Flood Light,Led Flood Light 50W,Led Flood Light 200W,Led Flood Light Marine Jiangmen Dilin Lighting High-Tech Co., Ltd. , https://www.jmdilinled.com
Manual valve operation Manual valve is operated by the handwheel and handle to operate the valve. It is widely used in petrochemical plant. The operator should pay attention to the following points: ◆ The opening direction of the valve, usually counterclockwise, means the valve is open and clockwise Valve closed. Therefore, when switching the valve to pay attention to the direction of ◆ valve handle, hand wheel size is based on the human valve switch design. Therefore, as long as the valve can be manually turned on and off, generally do not allow the use of levers or wrenches to switch the valve. In order to prevent too much force, damage to the sealing surface and other parts ◆ When the open gate valve and the stop valve to the dead point, turn 1/4 lap to 1/2 laps, so that the threads fit better, so as not to over-tighten , Damage to the valve ◆ can not gate valve, cut-off valve to do with the throttle, so easy to wash the valve plate and sealing surface, and the introduction of vibration leakage, damage to the valve ◆ open the steam valve should be slowly open to exclude condensation in the pipeline to prevent Water hammer phenomenon. Damaged valves and pipes ◆ Large diameter gate valve, globe valve and butterfly valve, and some bypass valve, its role is to balance the pressure on both sides of the valve to reduce the opening force. Therefore, open the bypass valve should be opened first, and then slowly open the valve, the valve closed, you should close the bypass valve, and then slowly close the main valve ◆ Some valves closed, until the temperature drops, the valve contraction, The sealing surface appears minor leakage phenomenon, at this time, should be the valve closed, and then a tight valve can automatically valve operation ◆ Trash in the opening of the pipeline should be discharged before the dirt and impurities to prevent clogging of debris, Can not work normally. Operation, check the trap work, if the steam is discharged too much, indicating that the valve is not working properly, if only the water is discharged, indicating that the valve is working properly ◆ Opening the bypass valve or flush valve to clean the pipe before the pressure reducing valve is enabled, the pipe is clean Close the bypass valve and then enable the valve Other valve operation is by electric, electromagnetic, pneumatic and hydraulic devices to open and close the valve. By instruments, electric switches, etc. to achieve remote control. Therefore, the operator should understand in detail the structure and operation principle of his moving valve, be familiar with the operating procedures, be able to operate independently and handle the emergency in the event of an accident. Precautions during operation ◆ Prevent the valve from being staggered, wrongly closed, leak open, turn off. Operators should clearly understand the role of each valve and the location of the process piping to prevent misuse, otherwise it may cause running material, mixing, pressure and other accidents. Such as a refinery unit, before the start of steam purge, a vent valve purge leak, the results, start, 370 ℃ high temperature slurry discharged from the vent valve, resulting in fire, the introduction of equipment downtime. ◆ Low temperature below 0 ℃ season, the disabled valve, to the main antifreeze, promptly open the end of the valve plug, discharge the condensate inside. The valve can not be excluded and intermittent work to take warmth. ◆ work on the valve at high temperature, when the temperature rises to above 200 ℃, the bolt heated and extended, easy to seal the valve lax, when necessary, the bolt should be "hot", heat tight, should not be in the valve closed position . Lest valve stem dead, and then open the difficulties. ◆ When the valve leaks, should first identify the leakage parts and causes, under normal circumstances sub-leakage and external leakage of two external leakage according to its external structure is divided into filler leaks and bonnets, valve leakage and sealing surface or lining Leakage of materials, the operator should be accurate judgments, to solve their own timely manner can not be resolved to maintenance workers in a timely manner. Valve packing gland should not be too tight pressure to stem flexible rotation is appropriate, the pressure is too tight, will increase the stem friction, increase the operating torque. Valve work, under normal circumstances can not be pressure to replace or add packing, otherwise, leading to the danger of media leakage.