Notes valve operation
◆ valve to prevent the stagger, wrong customs, open drain, drain clearance. Operatives to a clear understanding of each valve and the role of technology in the pipeline in place to prevent the misoperation, or may run expected, the mixture, hold pressure and so on. If an oil refining plant, prior to the start of steam purge, purge valve after a short clearance leakage as a result, when it started, 370 ℃ high temperature of the slurry from the short exhaust valve, causing the fire, the introduction of lay-off devices.
◆ 0 ℃ low temperature in the following season on the disabled valve to the main antifreeze, open the valve in a timely manner at the end of wire blocking, inside the discharge of condensate water. Can not be ruled out of the valve and stopped working to take measures to keep warm.
◆ on the work of the high temperature valve, when the temperature rose to more than 200 ℃, heating bolt elongation, easy to make Mifengbuyan valves, bolts necessary to deal with "hot tight", bear in heat, the valve should not be in full Kwan location. Top stem so as not to die, and then open the difficulties.
◆ valve leakage should be identified and causes of the spill site, under normal circumstances, duties and leakage outside two leak, according to the external leakage into the structure of the external leakage and the Department fill valve cover, valve leakage, as well as sealing surface or Lining material leakage, the operator should be judged accurately, they can be resolved in a timely manner to deal with, can not be resolved in a timely manner to deal with maintenance.
◆ valve gland packing weight should not be too tight to turn stem flexibility is appropriate, the weight is too strict and will increase the stem friction and increase operating torque, and so on. Valves work, under normal circumstances can not bring pressure to replace or add packing, or lead to leakage caused by media is dangerous.
◆ valve to prevent the stagger, wrong customs, open drain, drain clearance. Operatives to a clear understanding of each valve and the role of technology in the pipeline in place to prevent the misoperation, or may run expected, the mixture, hold pressure and so on. If an oil refining plant, prior to the start of steam purge, purge valve after a short clearance leakage as a result, when it started, 370 ℃ high temperature of the slurry from the short exhaust valve, causing the fire, the introduction of lay-off devices.
◆ 0 ℃ low temperature in the following season on the disabled valve to the main antifreeze, open the valve in a timely manner at the end of wire blocking, inside the discharge of condensate water. Can not be ruled out of the valve and stopped working to take measures to keep warm.
◆ on the work of the high temperature valve, when the temperature rose to more than 200 ℃, heating bolt elongation, easy to make Mifengbuyan valves, bolts necessary to deal with "hot tight", bear in heat, the valve should not be in full Kwan location. Top stem so as not to die, and then open the difficulties.
◆ valve leakage should be identified and causes of the spill site, under normal circumstances, duties and leakage outside two leak, according to the external leakage into the structure of the external leakage and the Department fill valve cover, valve leakage, as well as sealing surface or Lining material leakage, the operator should be judged accurately, they can be resolved in a timely manner to deal with, can not be resolved in a timely manner to deal with maintenance.
◆ valve gland packing weight should not be too tight to turn stem flexibility is appropriate, the weight is too strict and will increase the stem friction and increase operating torque, and so on. Valves work, under normal circumstances can not bring pressure to replace or add packing, or lead to leakage caused by media is dangerous.
