Proportional valve why than other small pipeline valves
3.7 machinesGraphical representation of numbers, names, symbols3.7.1 motors include synchronous or asynchronous and micro AC and DC motors3.7.2 generator3.7.3 centrifugal liquid pump, liquid from open end, closed end3.7.4 piston pump liquid from the open end, closed end3.7.5 pump water from the mouth into the mouth closed3.7.6 vacuum pump gas from the open end, closed endThe 3.7.7 screw and the small end of the turbo compressor represent compressed gasThe small end of the 3.7.8 piston compressor represents compressed gasThe small end of the 3.7.9 membrane compressor represents compressed gas3.7.10 turbine low pressure gas expansion after the big endian representation3.7.11 said the main piston expander after expansion of low pressure gas3.7.12 turbo expander small end said high-pressure low end big endian representation3.7.13 motor brake expander small end said high-pressure low end big endian representationThe heat exchanger or Freon evaporator for 3.7.14 water and freon refrigeration unit
3.10 pipes and their accessoriesGraphical representation of numbers, names, symbols3.10.1 flow pipeline thick lines.3.10.2 meter, pipe line, heating and blowing pipeline, fine solid line3.10.3 pipe with casing3.10.4 steam tracing tube3.10.5 cross pipe means two pipe crossing is not connectedThe 3.10.6 intersecting pipe refers to the intersection of two pipelines, and the diameter of the connecting point is 3~5 times of the line width of the connected pipe line3.10.7 branch pipeline3.10.8 medium flow is generally marked near the valve graphical symbolsThe 3.10.9 heat retaining tube may be represented by the symbol on the local portion of the insulated pipe3.10.10 pipe slope, line slope mark, drawn by the slope symbol in GB4458.43.11 general connection form of pipelineNumber, name, graphic symbol3.11.1 flange connection3.11.2 flow orifice3.11.3 pipe end sealing plate
3.9 automatic control valveGraphical representation of numbers, names, symbols3.9.1 a pneumatic valve film head cut off the gas valve to maintain the original opening3.9.2 pneumatic valve closed to prevent head cut off the gas valve does not close the film3.9.3 prevent full pneumatic valve head valve does not open cell membrane3.9.4 basic type of pneumatic control valve3.9.5 pneumatic open pneumatic control valve, film head inflating valve opens3.9.6 pneumatic closed pneumatic control valve with membrane head closed3.9.7 pneumatic butterfly valve basic type3.9.8 pneumatic open air butterfly valve, film head inflating valve opens3.9.9 pneumatic closed air butterfly valve with film head closed3.9.10 pneumatic three way regulating valve combined type3.9.11 pneumatic three way control valve split flow type3.9.12 pneumatic valve with hand wheel basic type. Other types of valves with graphics by "people"3.9.13 with handwheel and positioner pneumatic control valve basic type. Other types of valves with graphics by "people"3.9.14 pneumatic cut-off valve three through 1 - 2 head membrane inflatable membrane head 2 - 3.3.9.15 electric control valve refers to the electric actuator with magnetic amplifier actuator3.9.16 electric valves are driven by ordinary single-phase or three-phase electric heads (motors)3.9.17 electric gate valves are driven by ordinary single-phase or three-phase electric heads (motors)3.9.18 electric butterfly valves are driven by ordinary single-phase or three-phase electric heads (motors)3.9.19 two position two way solenoid valve3.9.20 two bit, three way solenoid valve has 1 - 2 electricity, no electricity 2 - 3 links3.9.21 two position, five way solenoid valve P - gas source A, B - vent S, R - Exhaust
3.8 valveGraphical representation of numbers, names, symbols3.8.1 angle valve at room temperature3.8.2 cold angle valve for low temperature use3.8.3 stop valve at room temperature3.8.4 ball valve often 9 temperature3.8.5 valve at room temperature3.8.6 butterfly valve at room temperature3.8.7 check valve flow from blank triangle to non empty triangle3.8.8 pressure reducing valve, small triangle for high voltage end3.8.9 throttling valve is needle valve3.8.10 three-way valve for normal temperature use3.8.11 four way valve used at normal temperature3.8.12 safety valve spring type safety valve3.8.13 trap actual drawing, you do not have to draw arrows3.8.14 inflator, cold box, little gas huff and puff, safe useValve for normal temperature of regeneration valve of 3.8.15 reverse stop valve3.8.16 reverse loading cold angle valve
