Compressors diaphragm

Metallic Diaphragm Compressors (Fig. 10-99) These are available for small quantities [up to about 17 mvh (10 ftVmin)] for compression ratios as high as 10 I per stage. Temperature rise is not a... 

Several other types of compressors are used in the process industries for a wide variety of special applications that may not fit the larger reciprocating or centrifugal compressor selections. One of the smaller compressors is a diaphragm compressor. Figures 12-116 and 12-117 and Table 12-10. 

Typical Diaphragm Compressor Process Construction Materials... 

There is a need for small compressors to be driven from low-voltage d.c. supplies. Typical cases are batteries on small boats and mobile homes, where these do not have a mains voltage alternator. It is also possible to obtain such a supply from a bank of solar cells. This requirement has been met in the past by diaphragm compressors driven by a crank and piston rod from a d.c. motor, or by vibrating solenoids. The advent of suitable electronic devices has made it possible to obtain the mains voltage a.c. supply for hermetic compressors from low-voltage d.c. 

Used in a rinse system, agitation can improve rinsing efficiencies dramatically.[6] This can result in lower rinse water volumes and open the door to further source reduction opportunities. The agitation is introduced at the bottom of the rinse tank through an H-shaped set of pipes (sometimes called a sparger) drilled with sufficient holes to create considerable turbulence. It is this turbulence which enhances process solution removal and enables less water to do more work. Care should be taken to use only clean air, but small diaphragm compressors (< 60) are often sufficient when equipped with a ball valve for throttling the flow. 

The dry- and sealless gas compression can be achieved in the low capacity range by reciprocating diaphragm compressors which operate up to very high pressures. 

Fig. 4.1-29. Power range of various compressor types for high-pressure [24], D, Diaphragm compressor PI, Piston compressor, dry running (piston ring, labyrinth) P2, Piston compressor, lubricated (piston ring) P3, Ultra-high-pressure compressor, lubricated (plunger piston) TR, Radial turbo-compressor TA, Axial turbo-compressor S, Screw compressor.

Diaphragm compressors, laboratory high-pressure compressors... 

The diaphragm compressor (Fig. 4.1.35), one of the oldest leak-free process machines, is limited to lower power (< 100 kW) because sensitive metal diaphragms must be used due to the high compression temperatures and pressures. Its applications include laboratories, pilot installations, and special production facilities. An attractive feature is their very high pressure-ratio (up to 20) produced by a single stage as a result of the small dead-space and good cool-... 

Diaphragm compressors are built for pressures up to 4000 bar, at least for short-term operation. They are economical when leak-free operation with no gas contamination is required at... 

For very small delivery quantities (0.1 to 1 m3 /h) and pressures up to 2000 bar, air-driven piston- and diaphragm compressors are suitable for transferring and compressing gases. Because of their compact construction, their explosion protection, and their ease of regulation, such machines are attractive for short-term operation in research facilities, especially for booster and filling applications (Fig. 4.1-37). 

Fig. 4.1-35. Diaphragm compressor (HOFER). a, Diaphragm b, Gas space c, Discharge valve d, Suction valve e, Diaphragm cover f, Perforated plate g, Hydraulic cylinder h, Oil overflow valve i, Oil return j, Cylinder cooling k, Check valve 1, Crank drive m, Cooling-water in/out n, Oil-cooling coil o, Oil chamber p, Oil injection (leakage compensation) q, Compensation pump r, Check valve s, Oil supply.

Additional equipment includes the manifold pressure regulator (MPR), Matheson Model no. 3-580 the inlet pressure regulator (IPR), Matheson Model no. 3075-1/4 the back-pressure regulator (BPR), Grove Valve Co s model no. 155 per Figure no. 11410-F-P2-A and the Corblin A1C-250 metal-diaphragm compressor, serial no. 1430. 

Gas anti-solvent fractionation was performed with the apparatus shown schematically in figure 1. Carbon dioxide was compressed to 200 bar by an air driven diaphragm compressor C1, and... 

Fig. 1.4 A cross section of a diaphragm compressor. (1) plunger piston, (2) oil cylinder, (3) diaphragm (4) and (5) in and out feedthroughs, respectively, for compressed gas. (The check valves are not shown.) (From reference 2 with modifications.)...

Fig. 1. Schematic diagram of experimental equipment showing (1) equilibrium cell, (2) heater, (3) circulating pump, (4) pump for circulating heat exchanger coolant, (5) diaphragm compressor, (6) pump for transferring Freon to and from cryostat, (7) four-way valve, and (8) heat exchanger.

D. Diaphragm Compressors. Diaphragm compressors effectively have a reciprocating action, but they differ mechanically from the reciprocating type described above. A diaphragm that usually moves vertically replaces the piston. It draws gas into a chamber... 

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