Carbon dioxide cylinder hose change process

When the cylinder high pressure gauge pointer is found to return to zero, tighten the cylinder switch clockwise and close the cylinder valve. Loosen the pressure adjusting screw of the low pressure gauge counterclockwise and close the air valve of the pressure reducing valve. Turn off the equipment connected to the pipeline or close the corresponding air inlet valve on the instrument to prevent air from entering, use a wrench to snap the cylinder and the pressure reducing table connection nut, slowly push the wrench handle upward until the nut is loosened, then hold the pressure reducer with your left hand, turn the nut to loosen with your right hand, and take off the pressure reducer. Remove the old cylinder and put in the new cylinder. Holding the pressure reducer with the left hand, with the right hand align the pressure reducer cylinder to the pressure reducing gauge connection nut with the new cylinder fitting and turn in the correct direction until slightly tightened. Using a wrench, snap the cylinder to pressure gauge connection nut into place and slowly press down on the wrench handle until the nut is tight on the cylinder fitting. Double check that the low pressure gauge pressure adjustment screw is loosened counterclockwise and close the decompression valve outlet air valve. Loosen the cylinder switch counterclockwise and open the cylinder valve. Observe that the high pressure gauge pointer is pointing to the correct position. Tighten the cylinder switch clockwise and close the cylinder valve. Let it stand for 1 minute and observe whether the needle of the high pressure gauge is deflected or not, so as to check the air tightness of the pressure reducer cylinder and the pressure reducer gauge connecting nut. After the airtightness check is completed, loosen the cylinder switch counterclockwise and open the cylinder valve.5, tighten the low-pressure gauge pressure adjusting screw clockwise slowly and gradually open the decompression valve outlet valve, and when the low-pressure gauge pointer is slightly lifted to the position of one frame, loosen the low-pressure gauge pressure adjusting screw counterclockwise and close the decompression valve outlet valve. Let it stand for 1 minute, observe whether the pointer of the low pressure gauge rotates, so as to check the airtightness of the pipeline connecting the pressure reducer with the incubator and other equipments. Note that at this time, the pipeline connected to the equipment should be in the state of shutdown or valve closed. If the pointer is not deflected, it means that the airtightness is good. Slowly tighten the pressure adjusting screw of the low-pressure gauge clockwise, gradually open the outlet valve of the decompression valve, and observe the pointer of the low-pressure gauge rise to the required pressure position.6 Turn on the pipeline connecting equipment or open the corresponding air inlet valve of the instrument, and wait for the completion of the initial intake of the instrument, and then observe whether the pointer of the low-pressure gauge rise to the required pressure position.7, such as the initial adjustment or the use of the process of finding that the low-pressure gauge exceeds the normal range, and when it needs to be adjusted back, do not drastically increase the pressure of the low-pressure gauge. If you need to adjust back, do not rotate the adjusting screw of the low pressure gauge counterclockwise greatly. You should slowly rotate the adjusting screw counterclockwise about 45 degrees, wait for the pipeline connected to the equipment to have air intake action, after the pipeline pressure release, and then observe whether the pressure indicated by the low-pressure gauge pointer into the normal range. Pressure adjustment should be done by slowly tightening the pressure adjusting screw clockwise to achieve the purpose of setting pressure. If the newly replaced cylinder does not have a cylinder switch hand valve, take the hand valve from the replaced cylinder in time and install it in the corresponding position to facilitate future operation. When the instrument is finished using, be sure to tighten the cylinder switch clockwise and close the cylinder gas valve. Loosen the pressure adjusting screw of the low pressure gauge counterclockwise and close the air valve of the decompression valve to ensure the safety of the instrument and the person. To prevent gas leakage due to piping aging or cylinder tipping and other accidents.