Almatec, part of PSG, a Dover (UK) company and premier manufacturer of sanitary air-operated double-diaphragm (AODD) pumps, has launched its new high-pressure pump series AHD/AHS. 

The new pumps from Almatec in AHD and AHS are ideal for high-pressure applications up to 15 bar (218 psig). A direct replacement for the AH Series, Almatec AHD Series pumps are described as the ideal solution for filter press applications and utilise an internal pressure booster while featuring the well-known Almatec ringtightening structure. 

The “D” in AHD stands for Duplex, which means the reinforcement of the drive pressure is more than 2:1 by the internal pressure boosting stage. This is achieved thanks to a maximum drive pressure of 7 bar (100 psig), which allows the AHD to build up discharge pressures up to 15 bar (218 psig). 

AHD Series pumps are available in three sizes (AHD 15, 25 and 40) with maximum capacities of 4, 10 and 20 m3 /h (17, 44 and 87 gpm).

The new AHS Series, which does not include an internal pressure booster, features an extremely rugged housing making it suitable for higher discharge pressures. The “S” in AHS stands from Simplex, meaning the drive pressure is transferred to the medium in a ratio of 1:1. This makes the AHS Series ideal for a wide variety of applications under heavy load conditions – from low discharge pressures to high-pressure applications up to 15 bar (218 psig). Due to the 1:1 ratio of the drive/discharge pressure, the corresponding air pressure has to be supplied from the compressor itself or an external pressure booster, also offered by Almatec. 

AHS pumps are available in two sizes (AHS 15 and 25). Both AHD and AHS feature specially developed heavy-duty diaphragms for a longer service life; the maintenance-free Perswing P air-control system; a reliable ball valve system; and adjustable suction and discharge ports with flange connections (DIN or ANSI).