1. Safety valve repair, commissioning, installation A: Mainly related to the maintenance: safety valve disassembly, valve seat grinding, back seat pressure setting, assembly of valve parts, and quality control. B: Commissioning mainly involves setting the pressure of the valve, and how to ensure economic operation under the premise of safety. C: Installation mainly involves: During the installation process if the welding process, heat treatment process and installation location, the direction of the exhaust pipe selection, the choice of exhaust and muffler, the vertical angle of the safety valve, the arrangement of the hydrophobic pipe, etc. . 2. Safety valve design pressure, emissions changes Design pressure changes mainly related to: the valve parts of the strength, temperature, material, heat treatment and other issues, as well as in the above conditions are met in the selection of the valve spring . Changes in emissions mainly involve: to ensure that when the change in displacement, to ensure that the valve does not chatter, do not jump. Through theoretical calculation of the displacement of the valve, readjust the valve opening. 3. Selection of safety valve Safety valve selection involves the use of safety valves provided by the user pressure, temperature, displacement, media, back pressure and other parameters to select the appropriate safety valve. 4. PCV valve control system optimization and modification PCV valve control system optimization mainly involves: the valve pressure sampling point position, accuracy, and circuit and DCS control system optimization. PCV valve modification mainly involves: the replacement of the international good quality, high performance, cost-effective valve. 5. PCV valve manual door repair, renovation PCV valve manual door repair involves: the ball on the mill, as well as the installation of the size control. To ensure that the case of thermal expansion, can play an effective seal. PCV valve manual door modification mainly involves the use of line sealing or cone sealing the way the valve. 6. Ignition exhaust valve repair and reformation Ignition exhaust valve repair mainly involves the valve seat grinding repair, surfacing, valve head grinding, stroke adjustment and so on. 7. Control valve repair, alteration, selection A: Maintenance is the main cover of the repair, replacement parts, packing replacement, intelligent control valve positioning system debugging. B: Retrofit is based on the site conditions, the original use of ineffective valve re-select the appropriate valve according to the actual situation C: Selection is based on the valve in the field to determine the relevant parameters. For example: media, flow, pressure, temperature, media, pressure, media viscosity, density and corrosivity, and noise requirements and other parameters.
