The explosion-proof sound and light alarm is suitable for installation in explosive gas environments containing IIC grade T6 temperature groups. It can also be used in explosion-proof locations in areas 1 and 2 where explosion protection is required in petroleum and chemical industries. It can also be used outdoors and outdoors. Can be used with any domestic and foreign manufacturers of fire alarm controller. When an emergency such as an accident or fire occurs at the production site, the control signal sent from the fire alarm controller activates the audible and visual alarm circuit and emits an acoustic and optical alarm signal to complete the alarm.
Note <br> <br> sound and light alarm when applied through a fixed mounting position, it is not easy to change its position, a particular application should consider the following points.
(1) Find out which possible leakage points of the devices to be monitored, analyze their leakage pressure, direction and other factors, and draw the distribution map of the probes, and classify them into three grades I, II and III according to the severity of the leakage.
(2) Determine the direction of leakage of toxic gas when there is a large amount of leakage, based on specific factors such as the airflow direction and direction of the location.
(3) According to the density of leaked gas (greater than or less than air), combined with the trend of air flow, integrated into a three-dimensional flow chart of leakage, and make an initial set point scheme at the downstream position of the flow.
(4) The leakage status of the leaking point was studied as microleakage or jetting. If it is a microleakage, set the position of the point to be near the leak. If it is a spray-like leak, keep it slightly away from the leak. Combine these conditions and draw up a final plan. In this way, the number and type of purchases needed can be estimated. (5) For sites where there is a large leakage of toxic gases, a test point should be set at a distance of 10-20 m per relevant regulations. For unattended, small, non-continuous pumping stations, attention should be paid to the possibility of toxic gas leakage, and a detector should generally be installed at the downtake.
(6) For locations with hydrogen leaks, the detector should be installed on the plane above the leak.
(7) For media with a gas density greater than air, the detector should be installed on the lower surface below the leak point and pay attention to the surrounding environment. For places where toxic gases can easily accumulate, special attention should be paid to the setting of safety monitoring points.
(8) For open toxic gas diffusion and escape environments, if there is a lack of good ventilation conditions, it is easy to make the toxic gas content in the air close to or reach the lower explosion concentration in a certain area. These are all non-negligible safety monitoring points. . According to the results of field accident analysis, more than half of them were caused by incorrect installation and calibration. Therefore, it is necessary to introduce the correct installation and calibration precautions to reduce the failure.
The brand represents innovation and customer satisfaction. When producing a machine, Volvo keeps the requirements and preferences of the customer in mind. Volvo also thinks in terms of solutions that increase the productivity and efficiency at the work site. Everything considered, Volvo offers a trusted package of high-quality machines where the company is ready for its customers when this is required.
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