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Almatec AH-Series AOD Pumps Features

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  • Plastic pumps (filter press feeding as typical usage)
  • Stainless steel pumps (paint and varnish industry as main field of application)
  • Double-acting principle of operation
  • Discharge pressure up to 15 bar (218 psig)
  • Max. capacities 4 / 10 / 20 m³/h (17 / 44 / 87 gpm)
  • Automatic pressure/volume adjustment for filter press feeding
  • No control or safety elements required for
    • dry running
    • over pressure
    • speed control
  • Safe operation over the entire range of capacity without over pressure risk
  • No drives, no rotating parts and no shaft seals
  • Running dry capability
  • Self-priming
  • Easy start-up
  • Gentle displacement by compressible drive medium
  • Compact dimensions
  • Specially developed heavy-duty diaphragms for long service life
  • Corrosion-proof and abrasion-proof housings in solid design made of polyethylene
  • ATEX conformity of the stainless steel models
  • Integrated muffler
  • Shock absorbers with female thread on the underside for simple direct installation (AH plastic only)
  • Horizontal or vertical position for suction and discharge ports
  • Ball valves with insensitivity to solids
  • Replaceable ball valves and ball retainers
  • Maintenance-free PERSWING P® air control system without dead center
  • Optional features meeting requirements

Construction and Materials

almatec-ah-series-air-operated-diaphragm-filter-press-feeding

The series AH has been specially developed for feeding filter presses with chemical wastes and special sludge. With a maximum drive pressure of 7 bar, they can build up discharge pressures of up to 15 bar (218 psig) as a result of the internal booster. This yields a ratio of drive pressure/discharge pressure of more than 1:2.

As genuine double-acting air-driven diaphragm pumps, the three sizes (AH 15, AH 25, AH 40) achieve maximum capacities of 4 m³/h (17 gpm), 10 m³/h (44 gpm) and 20 m³/h (87 gpm). The following values can be quoted as a rough guide to the filter area of the press: AH 15 up to 12 m², AH 25 up to 30 m², and AH 40 up to 60 m². Decisive are the consistency of the sludge, the dry content and the dehydration capability always.

Technical Data

Plastic Metal
AH 15 E AH 25 E AH 40 E AH 20 S AH 32 S
Dimensions for pump in mm (inch),
Width 282 (11.1) 382 (15.0) 490 (19.3) 220 (8.7) 324 (12.8)
Depth 179 (7.0) 256 (10.1) 296 (11.7) 162 (6.4) 229 (9.0)
Height 323 (12.7) 406 (16.0) 539 (21.2) 243 (9.6) 327 (12.9)
Flange connections
DIN or ANSI/BSP 15 (1/2″) 25 (1″) 40 (1-1/2″) BSP 3/4″ BSP 1 1/4″
BSP 1/4″ 1/2″ 1/2″ 1/4″ 1/2″
Weight kg (lb) 11 (24) 30 (66) 58 (127) 8.5 (19) 28 (62)
Max. particle size of solids mm (in.) 4 (0.16) 5 (0.20) 8 (0.31) 9 (0.35) 12 (0.47)
Suction lift dry mWC (ft)
EPDM/NBR ball valves 3 (9.8) 5 (16.4) 5 (16.4)
PTFE ball valves 1.5 (4.9) 2 (6.6) 2 (6.6) 2-3 (6.6-9.8) 2-3 (6.6-9.8)
Suction lift wet 9.5 (31.2) 9.5 (31.2) 9.5 (31.2) 9 (29.5) 9 (29.5)
Max. permissible driving pressure bar (psig) 7 (100) 7 (100) 7 (100) 7 (100) 7 (100)
Max. operating temperature °C (F) 70 (158) 70 (158) 70 (158) 80 (176) 80 (176)

Performance

Almatec AH 15 & AH 20 Air-Operated Diaphragm Pump

almatec-ah-15-and-ah-20-air-operated-diaphragm-pump

Almatec AH 25 & AH 32 Air-Operated Diaphragm Pump

almatec-ah-25-and-ah-32-air-operated-diaphragm-pump

Almatec AH 40 Air-Operated Diaphragm Pump

almatec-ah-40-air-operated-diaphragm-pump

Almatec Spare Parts

All Pumps stock a wide range of Almatec AH Series spares, including spare parts kits.

The Almatec spares we stock include:

  • Air Valves
  • Balls
  • Bushings
  • Capillary Rod Assembly
  • Check Body
  • Clamp Bands
  • Diaphragms
  • End Caps
  • End Cap O-Rings
  • Expanded PTFE Kits
  • Fluid Section Repair Kits
  • Gaskets
  • Mufflers
  • O-Rings
  • Oil Bottles
  • Pipe Bushing
  • Pistons
  • Retaining Rings
  • Screens
  • Shafts
  • Valve Balls
  • Seats

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