AODD Pumps for High-Pressure Applications
Almatec® AHD and AHS Series Air-Operated Double-Diaphragm (AODD) Pumps have been specially designed to provide a safe operation in high-pressure applications up to 15 bar (218 psig). A typical application of these pumps is filter press feeding.
AHD Series pumps utilize an internal pressure booster while featuring the well-known Almatec ring-tightening 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. The maximum drive pressure of 7 bar (100 psig) 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 AHS Series pump, 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 ration 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).
Users who need a high discharge pressure of 15 bar (218 psig) – no matter whether it is with an AHD pump with internal pressure transmission or an AHS pump that achieves the discharge pressure by means of an external booster – can do so with peace of mind that the pump has been specially designed for such pressure ranges and does not have to be held together by external reinforcements.
Features 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
Metrans Makina is the authorized Almatec distributor and service provider in Turkey.