Air Operated Double Diaphragm (AODD) Pumps - BML Series

BML series AODD pumps are positive displacement pump that uses two flexible diaphragms reciprocate back and forth in its casings, drawing in fluid and expels it, through check valves, to discharge piping. Compressed air is used as the power source to drive the pump. BML AODD pumps are used in many industries - chemicals, food processing, paints, electronics, mining, ink, etc. BML AODD pumps were manufactured by a joint venture company between Bumian (Mainland China) and Bumian (Hong Kong) for many years and has a track record of successfully exported to overseas markets.

Why choose BML AODD pumps?

• Versatility - BML AODD pumps can handle even the most corrosive or abrasive fluids. Pumps are made in a wide variety of different materials compatible with the properties of liquid, enabling them to pump virtually any chemical or fluid on the market.

• Safety - BML AODD pumps do not require electricity other than compressed air. This means that they can be used in places where electrical supply is not suitable i.e. in hazardous areas.

• Simplicity - BML AODD pump design is simple, using relatively less moving parts - means easy and fast maintenance. Powered by compressed air only - no electrical wiring nor complex controls. Easy installation, clean and smooth operation.

• Simple operation - BML AODD pumps have static sealing surfaces and do not require mechanical seals. They are self-priming. Diaphragm pumps can run dry without risk of damage.

We offer a wide range of high quality spare parts such as Air and Wet Repair Kits, diaphragms, balls, valve seats, air valves, seals, gaskets, silencers, etc. for repairing and maintainance of the most renowned brands such as ARO, Wilden, SandPiper, Yamada, etc.Materials of synthetic rubbers, thermoplastics and Teflon, PTFE,at competitive pricing and prompt delivery. Keep your pump operate at top efficiency and maximum life span

Pneumatic diaphragm pump performance


Bumian AODD BML15A


Bumian AODD BML20A


Bumian AODD BML25A
Specifications - BML Series Pumps: ½", ¾" and 1"
Model No. BML15A BML20A BML25A
Max flow (L/min) 35 54 160
Suction lift (M) 6 6 6
Lift (M) 70 70 70
Max discharge pres. Mpa 0.7 0.7 0.7
Limit of slurry, mm 2 3 3
Air supply pres (Mpa) 0.2 - 0.7 0.2 - 0.7 0.2 - 0.7
Shell material Aluminum Aluminum Aluminum
Diaphragm material PTFE PTFE PTFE
Liquid conn.(inch) ½ ¾ 1
Air conn.(inch) ¼ ¼ 3/8
Net wt. Kg 4.5 6 14
Gross wt. Kg 5 6.5 14.5
Ctn dimensions (cm) 18*22*28 20*23*32 24*30*45


Pneumatic diaphragm pump AODD BML40A


Pneumatic diaphragm pump AODD BML50A


Pneumatic diaphragm pump AODD BML80A
Specifications - BML Series Pumps: 1½", 2" and 3"
Model No. BML40A BML50A BML80A
Max flow (L/min) 379 568 1135
Suction lift (M) 6.1 6.1 8.5
Lift (M) 70 70 70
Max disch. pres. Mpa 0.8 0.8 0.8
Limit of slurry, mm 4.8 6.3 12.7
Air supply pres (Mpa) 0.2 - 0.8 0.2 - 0.8 0.2 - 0.8
Shell material Aluminum Aluminum Aluminum
Diaphragm material PTFE PTFE PTFE
Liquid conn.(inch) 1-½ 2 3
Air conn. (inch) ½ ½ ¾
Net wt. Kg 16 23 79
Ctn dimensions (cm) 27.5*40*54 34*46*64 98*80*51

Parts, Service Kits & After Market Parts

Maintain and service your pumps with original BML air section and wet section repair kits to ensure optimum performance level.

AFTER-MARKET PARTS - BML series air operated double diaphragm (AODD) pumps also have parts and repair kits that can fit or compatible with ARO, Wilden, SandPiper, Yamada, pumps. pumps.

BML After Market Parts

Repair kits, Diaphragms  - Buna, Neoprene, Viton, EPDM

BML fluid section service kits

Fluid Section Service Kits, Diaphragms - PTFE, Santoprene, Hytrel, etc.

BML AODD Air Section Service Kits

Air Section Service Kits