Compressor terminology

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Positive displacement compressor: Reciprocating compressor (piston compressor), Rotary compressor, Sliding vane compressor, Single vane rotary compressor, Rolling rotor compressor, Triangle rotor compressor, Multi-vane rotary compressor, Blade, Rolling piston compressor, Scroll compressor, Scroll, Stationary scroll, Fixed scroll, Driven scroll, Orbiting scroll, Swash plate compressor, Swash plate, Wobble plate, Screw compressor, Single screw compressor, Female rotor, Male rotor, Main rotor, Gate rotor, Oil free compressor, Diaphragm compressor, Reciprocating compressor, Single acting compressor, Double acting compressor, Dual effect compressor, Twin cylinder compressor, Closed crankcase compressor, Open crankcase compressor, Uniflow compressor, Return flow compressor, Dry piston compressor, Compound compressor, Multistage compressor, Stepped piston compound compressor, Differential piston compressor, Tandem compressor, Line valve, Stop valve, Discharge line valve, Suction line valve, Partial duty port, Energy regulator, Capacity control slide valve, Capacity control, Muffler, Coupling, Crankcase, Crankcase heater, Crankcase seal, Shaft seal, Stuffing box, Shaft packing, Mechanical seal, Bellows seal, Rotary seal, Labyrinth seal, Bearing, Sleeve bearing, Eccentric strap, Ball bearing, Roller bearing, Needle bearing, Thrust bearing, Pedestal bearing, Footstep bearing, Bearing housing, Thrust collar, Eccentric pin, Crankshaft counterweight, Crankshaft, Eccentric type crankshaft, Crank throw type crankshaft, Connecting rod, Crank pin end, Piston pin end, Crankshaft, Main journal, Crank arm, Crank pin, Crank throw, Crank-toggle, Valve disc, Valve stem, Valve seat, Valve plate, Valve cage, Valve cover, Valve lift guard, Valve lift, Valve port, Suction inlet, Compressor valve, Suction valve, Delivery valve, Disc valve, Ring plate valve, Reed valve, Cantilever valve, Beam valve, Poppet valve, Mushroom valve, Tulip valve, Cylinder bore, Clearance volume, Clearance pocket, Swept volume, Piston displacement, Theoretical displacement, Actual displacement, Actual displacement, actual output of gas, Working volume of the cylinder, Piston displacement, Cylinder, Cylinder block, Cylinder wall, Water cooled jacket, Cylinder head, Safety head, False head, Piston ring, Sealing ring, Scraper ring, Oil ring, Piston pin, Piston, Piston stroke, Suction stroke, Expansion stroke, Compression stroke, Discharge stroke, Booster compressor, Vertical compressor, Horizontal compressor, Angular type compressor, Symmetrically balanced type compressor. 1. Performance parameter: Parameters that characterize the main performance of a compressor, such as gas volume, pressure, temperature, power, as well as noise and vibration. 2. Constructional parameter: Parameters that describe the structural characteristics of a compressor, such as piston force, stroke, speed, number of cylinders, diameter of each cylinder stage, and external dimensions. 3. Inlet pressure/Suction pressure: The average absolute total pressure of the gas at the standard suction position. 4. Compressor inlet pressure/suction pressure of a compressor – The suction pressure at the first stage of the compressor is referred to as the inlet pressure.
5. Discharge pressure – The average absolute total pressure of the gas at the standard discharge position.
6. Compressor discharge pressure – The discharge pressure at the last stage of the compressor is called the discharge pressure.
7. Rated pressure – The pressure that meets the requirements specified by relevant standards, contracts, or nameplates.
8. Nominal pressure
9. Nominal pressure – A pressure value used as a grading criterion or for preliminary design calculations, without taking various influences into account.
10. Stage pressure ratio – The ratio of the discharge pressure to the suction pressure of a stage.
11. Total pressure ratio
12. Overall pressure ratio – The ratio of the compressor’s discharge pressure to its inlet pressure.
13. Pressure loss – The pressure drop that occurs during the flow of a fluid due to various resistances.
14. Actual pressure – The instantaneous pressure value of the compressor during operation.
15. Inlet temperature/suction temperature – The total temperature of the gas at the standard suction position.
16. Compressor inlet temperature/suction temperature of a compressor – The suction temperature at the first stage of the compressor is called the inlet temperature.
17. Discharge temperature – The total temperature of the gas at the standard discharge position.
18. Compressor discharge temperature – The discharge temperature at the last stage of the compressor is called the discharge temperature.
19. Capacity – The volume of gas compressed by a certain stage of the compressor and discharged at the standard discharge position, adjusted to account for the inlet temperature, inlet pressure, and its components (such as humidity).
20. Compressor capacity – The discharge volume at the last stage of the compressor is referred to as the compressor’s capacity.
21. Standard capacity – The capacity when adjusted to standard operating conditions (temperature and pressure).
22. Rotational speed/rotation frequency
23. Rotational speed/rotations per minute/rotational frequency – The number of rotations per unit time of the main shaft of a compressor driven by an axle.
24. Outer dead point – The extreme position reached by the piston in its movement toward the cover or outer end.
25. Inner dead point – The extreme position reached by the piston in its movement toward the axle or inside the cylinder.
26. Stroke – The distance traveled by a point on the piston from the outer dead point to the inner dead point.
27. Clearance volume – The volume within the cylinder that can hold residual gas when the piston is at the dead points.
28. Stroke volume/swept volume – The volume of gas swept by the piston during one stroke.
29. Relative clearance volume – The ratio of the clearance volume to the stroke volume.
30. Working volume – The sum of the stroke volume and the corresponding clearance volume.
31. Balancing volume – The volume of the ventilation chambers in a compressor that serves to balance the forces generated by gas pressure.
32. Cylinder diameter – The diameter of the cylinder where the piston moves.
33. Stroke-bore ratio – The ratio of the stroke to the cylinder diameter.
34. Crank radius – The distance between the axis of the crankshaft journal and the axis of the crank pin.
35. Length of connecting rod – The distance between the axes of the large and small ends of the connecting rod.
36. Ratio of crank radius to length of connecting rod – The ratio of the crank radius to the length of the connecting rod.
37. Mean piston speed – The average value of the instantaneous piston speed per unit time.
38. High-speedity coefficient – Sn2/m(r/min)2, which is the product of the stroke and the square of the rotational speed.
39. Capacity coefficient – The ratio of the compressor’s capacity to the stroke volume of the first stage over a given time period.
40. Pressure coefficient – The ratio of the pressure after considering losses due to flow and pulsation to the original inlet pressure.
41. Volume coefficient – A coefficient that takes into account the expansion of the compressed medium in the clearance volume, thereby indicating the efficiency of the stroke volume.
42. Heating coefficient
43. Temperature coefficient – A coefficient that takes into account the heating of the gas during inhalation, indicating the degree of utilization of the stroke volume.
44. Gas seal coefficient
45. Gas leak coefficient – A coefficient that takes into account leaks of the compressed medium in various parts of the cylinder, indicating the degree of utilization of the inhaled gas volume.
46. Condensate coefficient
47. Humidity coefficient – A coefficient that takes into account the effect of moist air, which becomes condensed after compression and cooling, on the performance of subsequent stages of the compressor.
48. Exhaust coefficient – In compressors used in industrial processes, this coefficient takes into account the extraction or addition of gas between stages, thereby affecting the stroke volume of the next stage.
49. Compressibility coefficient
50. Compressibility factor – A dimensionless factor that indicates the difference between the behavior of real gases and ideal gases.
51. Distance between rows/distances between lines – The distance between the parallel axes of adjacent cylinders.

1. Crankshaft piston compressor – A compressor that has a crankshaft with rotating motion.
2. Reciprocating compressor without crankshaft – A compressor that lacks a crankshaft or any rotating shaft.
3. Shaft piston compressor – A compressor in which the piston’s axis is parallel to the axis of the drive shaft, with pistons arranged around it.
4. Diaphragm compressor – A compressor in which a diaphragm is driven mechanically or hydraulically to complete the compression cycle.
5. Gas compressor – A general term for compressors that compress gases other than air; air compressors are also included in this category.
6. Air compressor – A compressor whose working medium is air.
7. General purpose compressor/all purpose compressor/compressor for pressed air/pressed-air compressor – A compressor used to provide power for pneumatic machinery and tools.
8. Process compressor – A compressor used in industrial processes such as those in the oil and chemical industries.
9. Compressor for ship purpose – A compressor designed specifically for use on ships.
10. Filling compressor – A compressor used to fill containers with compressed gas.
11. Multi-purpose compressor/multi-service compressor – A compressor in which multiple types of gases are compressed in different cylinders, without any sequential relationship between them.
12. Combined compressor/combination compressor – A compressor that uses different types of compressors in sequence to increase the pressure of the gas.
13. Motor compressor/gas-engine compressor – A compressor driven by a motor or gas engine.
14. Integral compressor/motor compressor – A compressor that shares part of its moving mechanism with a reciprocating engine. Compressors with less common movement mechanisms driven by gas engines are also called motorcycle compressors. 15. free piston compressor Free piston compressor - a crankshaft-less compressor in which internal combustion power directly compresses the working medium through a counter-rotating piston. The return stroke and synchronization of the piston are accomplished using an air cushion and a synchronization mechanism. 16. compressor with electro-magnetically actuated piston. Electromagnetic driven piston compressor (electromagnetic compressor) - a compressor in which the magnetic force of an alternating magnetic field directly drives the piston to reciprocate linear motion to complete the compression cycle. 17. mini type compressor micro compressor - generally refers to an air compressor with a power of no more than 15 kW and a rated pressure of no more than 1.4MPa 18. stationary compressor stationary compressor (fixed compressor) - a compressor fixed on the foundation 19. portable compressor mobile compressor (mobile compressor) - refers to a portable or mobile compressor 20. skid mounted compressor skid mounted compressor (block compressor) - a compressor fixed on a skid 21. no-foundationcompressor No foundation compressor - a compressor equipped with a vibration absorption device that does not require a foundation 22. packaged compressor hood compressor (box compressor) - equipped with a closed casing to cover the main engine, driver and ancillary equipment to form an independent unit 23. water cooled compressor Mixed cooling compressor - a compressor in which the compressed medium is cooled by (air) gas and liquid respectively 26. compressor with crosshead compressor with crosshead - a compressor with a crosshead 27. compressor without crosshead compressor without crosshead - a compressor without a crosshead 28. non-lubricated compressor/dry-up compressor Dry-running compressor (non-lubricated compressor) (oil-free compressor) A compressor that runs dry between the piston and cylinder 29. labyrinth compressor Labyrinth compressor - a compressor that compresses the medium with a labyrinth seal 30. booster compressor Booster compressor (pressurizer) - a compressor that further increases the medium pressure in a system with pressure (not less than 0.1MPa) 31. recycle compressor Circulation compressor (cycle machine) - after the compressed medium is discharged from the exhaust port, part or all of it returns to the suction port after passing through a certain system, and the total pressure ratio is not greater than 2. 32. variable-stage compressor Variable-stage compressor (variable working condition compressor) - a compressor that changes the number of compression stages to adapt to the needs of large changes in gas volume or pressure 33. single-acting compressor (single-acting compressor) - a compressor in which only one end (surface) of the piston and the cylinder form a stroke volume 34. double acting compressor double-acting compressor (double-acting compressor) - a compressor in which both ends (surfaces) of the piston form a stroke volume with the cylinder 35. low pressurecompressor low pressure compressor - a compressor with a rated pressure not greater than 1.0MPa 36. medium pressurecompressor medium pressure compressor - a compressor with a rated pressure greater than 1.0MPa to 10MPa 37. high-pressure compressor (high pressure compressor) - a compressor with a rated pressure greater than 10MPa to 100MPa 38. ultra-high-pressure compressor Ultra-high-pressure compressor - a compressor with a rated pressure greater than 100MPa 39. single-stage compressor Single-stage compressor - compression with a stage number of 1) compressed medium Compressed medium (medium, working fluid) - the compressed working fluid (gas) 2) stage stage - the basic unit that completes the compression cycle 3) section - in a process compressor, when the gas volume and composition of adjacent stages are the same, it is called a section 4) line (row) Row - a single cylinder or series cylinders on the same cylinder axis, structurally forming a row 5) bare compressor host - the general name of the body part and compression part of the compressor 6) driver driver (prime mover) - the power machine or device that drives the compressor 7) au* liary equipments Auxiliary equipment (auxiliary equipment) - the general name of the other equipment except the main engine and driver8) frame and moving parts Body part (basic part) - the general name of the compressor body or crankcase and moving parts, etc. 9) compressingcomponents compression part (cylinder part) - the general name of the compressor's cylinder, piston, valve, stuffing box and other components 10) variable-type Variation - a partial change to the structure of the prototype, with "structural differences" marked in the model, is called a variant of the prototype. 11) variant Derivative - a prototype whose body part remains basically unchanged or the "structure" in its model remains unchanged, but whose "features" and/or performance parameters and properties or media change, is called a derivative of the prototype. 12) inter-cooling Intermediate cooling (interstage cooling) - conducts away the heat of the compression medium between stages 13) after coling Post-cooling - conducts away the heat of the compressed medium after completion of compression 14) liquid injection cooling Liquid injection cooling - injects liquid into the compressed medium to reduce the temperature of the medium 15 ideal compressor Ideal compressor - a compressor with no clearance volume, no leakage, and no pressure loss. Professional vocabulary of reciprocating compressor in Chinese and English 2) Professional vocabulary of reciprocating compressor data in single station in Chinese and English. Collected by myself. I'm still sorting out a comparison table for centrifugal compressors. It will be published soon. I hope everyone will support it. Terminology InReciprocating Compressors Datasheet driver nameplate kw driver nameplate power kw no negative tolerance applies Max acceptable piston speed maximum allowable piston speed Pulse device pulse suppress Inlet pressure pulsation suppression device inlet Certified PT guarantee point Pressure at cylinder flange pressure at cylinder flange 3) Compressibility compression coefficient (compression ratio) TEMP ADIABATIC absolute temperature as built Completion proposal Total Bkw at compressor shaft Capacity for NNT Volumetric flow rate without negative deviation Even minute traces Elevation at grade level winterization required Partial Sides Electrical Classification Class __ _ _ Group __ _ _ Zone area__ _ _ Group__ _ _ _ Level Main unit host L.O Console Lubricant station CW Console Cooling water station POCKETS/Valves Operation Clearance chamber/valve opening Type Unloaders, Plug/Finger Unloader type Plug type/Finger type Combined Rod Load C Comprehensive piston rod load (compression) Combined Rod Load T Comprehensive piston load (tension) Auto Loading DelayInterlock Automatic load delay interlock Outboard bearing 4) Slide base for driver Motor guide rail base Sole plate for driver Driver base Key less drv Quilt shaft Drive Guard Compressor Valves Dynamic Response skid, soleplate, baseplate leveling screw Column mouting Bolts or Studs for soleplate to frame Rail Chock block shims direct grounted Direct grouting Cement/Mortar Grout cement/mortar pouring off mounted Flange finish Inlet strainer Manifold piping Manifold piping spool piece for inletstrainer Inlet filter sleeve 5) Match marked One CMMN to all units All equipment share a Dual filters with transfer valves Dual filters with transfer valves Seperated machine mounted panel Seperated free standing panel Independent free prevention control panel Cyl. LUBRICATORS Hydraulic tension tools US Customary Units Barring device Instrument air Single or double acting Bore Stroke Cylinder Liner Piston displacement Volumetric efficiency Liner nominal thickness Rod REV DEGREE Facing Flange surface Wear bands Support ring Thread roots stress Thread root stress 6) Gas configuration Gas configuration purge Clear simulation simulation, simulation steady state transient state dynamic transient restart dynamic restart scenario trend plot trend chart interactive simulation simulation compressor generic compressor simple compressor centrifugal compressor centrifugal compressor reciprocating compressor reciprocating compressor adiabatic efficiency mechanical efficiency Mechanical efficiency driver driver generic driver simple driver turbine driver gas turbine fuel Xreg fuel supply ambient temperature ambient temperature au * liary load additional load status mode mode swapping mode switching bypass/free flowing bypass setpoint set point constraint limit, constraint connection connection, relationship trend pressure speed speed head inventory inventory velocity overall heat transfer coefficient burried depth unit mass mass volume volume density density heating value heat capacity heat capacity line pack charging rated heat rate rated heat consumption rate rated fuel usage rated fuel utilization rate resistance coefficient resistance coefficient temperature flow rate mass flow rate actual flow rate actual flow accumulated volume accumulated volume elevation specific heat specific heat thermal conductivity viscosity viscosity specific gravity specific gravity, density fluid fluid ma * mum maximum minimum minimum surge surge stonewall stagnation convergence orthogonal right angle, orthogonal toggle switch grid lattice cylinder DPID driver performance curve CPID compressor performance curve TPID gas turbine performance curve performance curve performance curve disconnect disconnect data block data block standard conditions standard conditions upstream downstream downstream node node pipe pipe section diameter diameter length Length wall thickness roughness gas equation gas equation knot spacing space step carbon dio * de carbon dioxide supply gas source, air inlet point delivery distribution point valve check valve one-way valve, check valve block valve block valve regulator valve regulating valve gate valve symbol in the gate valve formula: Reynolds Number Absolute roughness Internal diameter Outside diameter of pipe Gas density/density of the gas Universal gas constant Compressibility factor Z molecular weight of gas gauge pressure Absolute pressure compression ratio length of the pipe time cross-sectional area of the pipe velocity of the gas Gas flow velocity acceleration due to gravity elevation of pipe elevation of pipe suction/discharge temperature inlet/outlet temperature rated power shaft power inlet actual volumetricflow adiabatic head adiabatic head Design safety factor Design safety factor F Longitudinal joint safety factor E Temperature derating factor Yield strength Yield strength Steel pipe Plastic pipe Flexible tube liquid configuration liquid configuration pump pump