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Diaphragm Compressors

HOFER diaphragm compressors

HOFER diaphragm compressors provide a lubricant and abrasion-free compression of gases and gas mixtures.

Since they operate without leakage, they are particularly suitable for gases of highest purity as well as explosive, toxic and expensive gases. HOFER diaphragm compressors ensure a reliable compression of various gases such as hydrogen, helium, argon, ethylene, fluorine, hydrogen sulphide, chlorine, monosilane or nitrogen trifluoride.

HOFER diaphragm compressors are usually used for filling of storage vessels, for feeding into continuous processes or as gas circulating compressors.

HOFER diaphragm compressors are characterized by their design that makes the machines exceptionally safe, reliable and easy to maintain.

As a rule, we deliver our diaphragm compressors as complete units, including a base frame, a power unit, pulsation dampers, coolers, automatically- or manually-operated valves, instruments and, if requested, a control unit. Optionally, we also supply diaphragm compressors without peripheral equipment ready to be installed in your system.

All HOFER diaphragm compressors are subjected to a test run under load at our factory, during which the operating data are recorded and documented.

Features at a glance

  • oil-free compression due to hermetic separation between gas and oil chamber
  • technical abrasion-free compression due to static seals in the gas stream
  • leakage rates of 10^-4 mbar l/sec (on request up to 10^-6 mbar l/sec)
  • purge or buffer gas is not required
  • long service life because of a hydraulically actuated diaphragm, no mechanical linkage
  • good cooling due to the large surface of the diaphragm head
  • cooling coil in the oil chamber of the diaphragm head, no weakening of the cover caused by cooling channels
  • automatic shutdown in case of a diaphragm failure prevents consequential damage
  • discharge pressure up to 43,511 psi (3,000 bar)
  • stage pressure ratios up to 7
  • up to 4 stages at a crank drive
  • mass compensation for foundation-free installation
  • wear resistant and smooth operation due to low piston speeds
  • water cooling provides the best cooling effect as well as a low sound pressure level
  • manufactured in compliance with 2006/42/EC EC-Machinery Directive. Applied standards: DIN EN 1012 part 1, DIN EN 12100 part 1,  DIN EN 60204 part 1 et al.
  • explosion proof according to the European Directive 2014/34/EU, if necessary

Selection of Diaphragm Compressors

HOFER diaphragm compressors are custom-made to meet your individual requirements.
Here are some examples:

Diaphragm Compressor MKZ 560-15Diaphragm Compressor MKZ 560-15

Diaphragm Compressor
MKZ 560-15

Two compressors. One compressor in operation, the second compressor on standby

Suction capacity:

490 Nm3 / h

Type of gas:

H2

Suction pressure:

410 psi (28 bar abs)

Discharge pressure:

1,410 psi (97 bar abs)

Valve and instrumentation panel

Flow control valve for each of the two compressors. All valves are bellows-sealed type.Pressure line for suction- and intermediate pressure with block & bleed valves.
Discharge pressure line with double block & bleed valves.

Diaphragm Compressor MKZ 710-5/450-15Diaphragm Compressor MKZ 710-5/450-15

Diaphragm Compressor
MKZ 710-5/450-15

Two compressors. One compressor in operation, the second compressor on standby

Suction capacity:

390 Nm3 / h

Type of gas:

H2

Suction pressure:

130 psi (9 bar abs)

Discharge pressure:

1,410 psi (97 bar abs)

Valve and instrumentation panel

Flow control valve for each of the two compressors. All valves are bellows-sealed type.Pressure line for suction- and intermediate pressure with block & bleed valves.
Discharge pressure line with double block & bleed valves.


Diaphragm Compressor MKZ 400-10/250-25/160-60

Diaphragm Compressor
MKZ 400-10/250-25/160-60

Suction capacity:

72 Nm3 / h

Type of gas:

Ar/O2 gas mixture

Suction pressure:

190 psi (13 bar abs)

Discharge pressure:

8,700 psi (600 bar abs)

Diaphragm Compressor MKZ 500-10/400-25

Diaphragm Compressor
MKZ 500-10/400-25

Suction capacity:

450 Nm3 / h

Type of gas:

H2

Suction pressure:

380 psi (26.2 bar abs)

Discharge pressure:

2,620 psi (180.4 bar abs)


Diaphragm Compressor MKZ 300-5/200-40

Diaphragm Compressor
MKZ 300-5/200-40

Suction capacity:

27,5 Nm3 / h

Type of gas:

propane/H2-mixture

Suction pressure:

70 psi (5 bar)

Discharge pressure:

4,350 psi (300 bar)

Diaphragm Compressor MKZ 185-5/120-15

Diaphragm Compressor
MKZ 185-5/120-15

Suction capacity:

5,5 Nm3 / h

Type of gas:

H2

Suction pressure:

70 psi (5 bar)

Discharge pressure:

2,190 psi (151 bar)


Diaphragm Compressor MKZ 560-5/350-25 / MKZ 200-70

Diaphragm Compressor
MKZ 560-5/350-25 / MKZ 200-70

Suction capacity:

142 Nm3 / h

Type of gas:

Ar-O2-He-mixture

Suction pressure:

135/2,920 psi (9.3/201 bar)

Discharge pressure:

2,920/9,010 psi (201/621 bar)

Diaphragm Compressor MKZ450-10/280-25

Diaphragm Compressor
MKZ450-10/280-25

Suction capacity:

112 Nm3 / h

Type of gas:

H2

Suction pressure:

160 psi (11 bar)

Discharge pressure:

3,640 psi (251 bar)


Diaphragm Compressor MKZ 280-10/185-25/120-100

Diaphragm Compressor
MKZ 280-10/185-25/120-100

Suction capacity:

20 Nm3 / h

Type of gas:

He

Suction pressure:

115 psi (8 bar)

Discharge pressure:

12,750 psi (880 bar)

Diaphragm Compressor MKZ 860-2/470-10/315-25

Diaphragm Compressor
MKZ 860-2/470-10/315-25

Suction capacity:

80 Nm3 / h

Type of gas:

He

Suction pressure:

15 psi (1.03 bar abs)

Discharge pressure:

3,420 psi (236 bar abs)


Diaphragm Compressor MKZ 680-10/450-40

Diaphragm Compressor
MKZ 680-10/450-40

Suction capacity:

581 Nm3 / h

Type of gas:

H2

Suction pressure:

260 psi (18 bar abs)

Discharge pressure:

4,075 psi (281 bar abs)