AH High Pressure Air-Operated Double Diaphragm (AODD) Pump by Almatec

Designed for high pressure applications including feeding filter presses with chemical wastes and special sludge, as well as transfer of paint and varnishes

ALMATEC's high-pressure diaphragm pumps made of plastic have been specially developed for charging filter presses with chemical wastes and special sludge. With a driving pressure of max. 7 bar (100 psig), pumps of the series AH build up a delivery pressure of 15 bar (218 psig) on account of the internal pressure boost. These genuine double-action pneumatic diaphragm pumps are available in three sizes with a maximum delivery volume of 4 m³/h / 70 l/min / 18.5 gpm (AH 15), 10 m³/h / 180 l/min / 48 gpm (AH 25) and 20 m³/h / 330 l/min / 87 gpm (AH 40). All housing parts in contact with the product are made of PE UHMW. This polymer material is seven times more resistant to abrasion than PP. PE is also more resistant to wear than iron, aluminium and even steel.

The high-pressure diaphragm pumps made of stainless steel 1.4408 (SS316) is a further development of the plastic series AH. The wetted housing parts are made of stainless steel precision casting 1.4408 (SS316), the center block of PE conductive (AH20S) and aluminium (AH32S), the ball valves of PTFE and the heavy-duty diaphragms of PTFE/EPDM compound. Moreover the pumps meet the ATEX requirements of the directive 94/9/EG. The AH-S pumps have a wide range of application fields, the typical one are coating facilities.

Further features of series AH at a glance:
• Corrosion-proof and wear-resistant housing in solid design made of polyethylene for heavy-duty applications
• Double-acting principle of operation
• High pump safety due to innovative ring-tightening structure
• Automatic pressure/volume adjustment for filter press feeding
• No control or safety elements required for dry running, over pressure and speed control
• Safe operation over the entire range of capacity without over pressure risk
• No drives, rotating parts or shaft seals
• Self-priming and dry run capable
• Easy startup
• Gentle displacement by compressible drive medium
• Compact dimensions
• Specially developed heavy-duty diaphragms for long service life
• Integrated muffler
• Horizontal or vertical position for suction and discharge ports
• Maintenance-free PERSWING P® air control system without dead center

Model AH 15 E (Almatec High Pressure AH Series)
Wetted Housing PE UHMW (Ultra-High-Molecular-Weight Low Pressure PE)
Diaphragm EPDM, NBR, PTFE
Approx wg 11 kg
Air Inlet 1/4" BSP (R1/4)
Pump inlet 1/2" ANSI
Pump outlet 1/2" ANSI
Max Size Solids 4 mm
Suction lift dry 3 M
Max Flow 70 LPM
Max Drive and OP 6 Bar
Max OPT 70 C

Model AH 25 E (Almatec High Pressure AH Series)
Wetted Housing PE UHMW (Ultra-High-Molecular-Weight Low Pressure PE)
Diaphragm EPDM, NBR, PTFE
Approx wg 30 kg
Air Inlet 1/2" BSP (R1/4)
Pump inlet 1" ANSI
Pump outlet 1" ANSI
Max Size Solids 5 mm
Suction lift dry 5 M
Max Flow 180 LPM
Max Drive and OP 6 Bar
Max OPT 70 C

Model AH 40 E (Almatec High Pressure AH Series)
Wetted Housing PE UHMW (Ultra-High-Molecular-Weight Low Pressure PE)
Diaphragm EPDM, NBR, PTFE
Approx wg 58 kg
Air Inlet 1/2" BSP (R1/4)
Pump inlet 1 1/2" ANSI
Pump outlet 1 1/2" ANSI
Max Size Solids 8 mm
Suction lift dry 5 M
Max Flow 330 LPM
Max Drive and OP 6 Bar
Max OPT 70 C

Model AH 20 S (Almatec High Pressure AH Series)
Wetted Housing SS 1.4408
Diaphragm PTFE
Approx wg 8.5 kg
Air Inlet 1/4" BSP (R1/4)
Pump inlet 3/4" FNPT
Pump outlet 3/4" FNPT
Max Size Solids 9 mm
Suction lift dry 2 M
Max Flow 66 LPM
Max Drive and OP 6 Bar
Max OPT 80 C

Model AH 32 S (Almatec High Pressure AH Series)
Wetted Housing SS 1.4408
Diaphragm PTFE
Approx wg 28 kg
Air Inlet 1/2" BSP (R1/4)
Pump inlet 1 1/4" FNPT
Pump outlet 1 1/4" FNPT
Max Size Solids 12 mm
Suction lift dry 2 M
Max Flow 66 LPM
Max Drive and OP 6 Bar
Max OPT 80 C