Air diaphragm pump(also know as a Membrane pump, air operated double diaphragm pump(AOOD) or pneumatic diaphragm pump)that uses a combination of the reciprocating action of a
rubber,thermoplastic or teflondiaphragm and suitable valves either
side of the diaphragm (check valve,butterfly valves,flap valves,or
any other form of shut-off valves) to pump a fluid.
Max. Self-priming Lift (dry)
Max. Air Pressure
Max. Particle Diameter
Max. Installation Dimension
Air Diaphragm Pump
1. Non leakage
2. Good self priming performance
3. Convey all kinds of medium
4. Material:Cast steel,Alu,SS,PP
Main Performance Parameters
No. Parameter Names Units Reference Values
1 Max. Working Air Pressure Mpa 0.83
2 Max. Flow l/min 135
3 Max. Head m 70
4 Max. Fluid Output Pressure Mpa 0.83
5 Max. Particle Through Diameter mm 3
6 Weight kg 9.5/12.5 ( PP/KV ) /9.5 (AL)/ 14.5(SS/CI)
7 Noise Level db <85
Maximum Applied Temperature Limits (diaphragm / ball / seal material)
Acetal ···············································40°- 150°F
225°F (-40°- 107.2°C)
220°F (4.4°- 104°C)
180°F (-12°- 82°C)
Installation operation and maintenance:
READ, UNDERSTAND, AND FOLLOW THIS INFORMATION TO AVOID INJURY AND
Do not exceed the maximum inlet air pressure as stated on the pump
- The air inlet of the pump is connected to the air supply that has
sufficient capacity and of which pressure conforms to the design
- The clean compressed air makes for the extension of the service
life of the pump.
- If the air supply line is a hard pipe, the short hose connecting
the pump and the pipe can reduce vibration and twisting. (It is
recommended to reduce the pulse in the fluid with a use a surge
tank or fluid buffers.)
- The air intake pipe and the pressure-regulating filter must be
supported due to their weight. If the pipe is not supported, it may
damage the pump.
- The air intake pipe of the pump must be installed with the pressure
regulating valve to ensure the air supply pressure doesn’t exceed
the specified range.
The limit pressure specified in the Manual can’t be used in the
operation of the pump, otherwise the personal injury, pump damage
or property loss will arise out of excessive air pressure.
- Be sure material hoses and other components are able to with -stand
fluid pressures developed by this pump. Check all hoses for damage
or wear. Be certain dispensing device is clean and in proper
STATIC SPARK. Can cause explosion resulting in severe injury or
death. Ground pump and pumping system.
- Sparks can ignite flammable material and vapors.
- Secure pump, connections and all contact points to avoid vibration
and generation of contact or static spark.
- Use proper ventilation.
- Keep inflammables away from heat, open flames and sparks.
- Keep containers closed when not in use.
The discharges from the pump may contain impurities, which may
cause serious injury. The discharges can be drained away through
the pipe from the jobsite and around the operator.
Even if the diaphragm ruptures, it can also discharge the material
forcibly from the exhaust muffler.
- When the hazardous or inflammable materials are pumped, the
discharges can be removed to the safe remote location through the
- Between the pump and the muffler is used the interface of 3/8” in
HAZARDOUS PRESSURE. Can result in serious injury or property
damage. Do not service or clean pump, hoses or dispensing valve
while the system is pressurized. Disconnect air supply line and
relieve pressure from the sys -tem by opening dispensing valve or
device and / or carefully and slowly loosening and removing outlet
hose or piping from pump.
HAZARDOUS MATERIALS. Can cause serious in -jury or property damage.
Do not attempt to return a pump to the factory or service center
that contains hazardous material. Safe handling practices must
comply with local and national laws and safety code requirements.
- Obtain Material Safety Data Sheets on all materials from the
supplier for proper handling instructions.
Explosion Hazard: Some models, together with some parts that fluid
contacts, are made of aluminum, so they can’t be put into use with
trichloroethane, methylene chloride or other halogenated
hydrocarbon solvents, otherwise they may react and cause an
- Prior to the use with this type of solvent, it is a must to inspect
the fluid caps, manifolds and all fluid contact parts of the pump
motor in order to ensure compatibility.
- The pump should be placed close to the product as far as possible
to shorten the suction pipe and reduce the number of parts to the
- To extend the service life of diaphragm, we must to place the pump
close to the pumped fluid as much as possible. When the inlet
pressure exceeds 10 feet (3 meters) of the fluid column, it is
necessary to install a set of pressure relief and regulation
devices to extend the service life of diaphragm.
- We must ensure the sealing of each adapter for the inlet and outlet
- All the fasteners must be tightened once again prior to the use of
the Product to avoid the looseness that may arise out of the creep
of the seal components and effectively prevent the leakage of fluid
Verify the chemical compatibility of the pump wetted parts and the
substance being pumped, flushed or re -circulated. Chemical
compatibility may change with tempera -ture and concentration of
the chemical(s) within the substances being pumped, flushed or
circulated. For specific fluid compatibility, consult the chemical
Maximum temperatures are based on mechani -cal stress only. Certain
chemicals will significantly reduce maximum safe operating
temperature. Consult the chemical manufacturer for chemical
compatibility and temperature lim -its.
Make sure that all the operators of this equipment have been
specifically trained, grasped the safe operating practices and
understood the limitations of the equipment. They know how to wear
PPE if needed.
Do not use the pump for the structural support of the piping
system. Be certain the system components are properly supported to
prevent stress on the pump part
- Suction and discharge connections should be flexible connec -tions
(such as hose), not rigid piped, and should be compatible with the
substance being pumped.
It is a must to prevent unnecessary damage to the pump. If it has
to lie idle for a long time, please clean it thoroughly after each
- The Product left in the pump will become dry or sticky on the pump,
which will give rise to the diaphragm and valve problems prior to
the next start. At the freezing temperature, it is must to empty
the pump completely under any circumstances after use.
- It is an effective way in reducing users’ downtime to get the
appropriate assembly available at any time. The application of the
authentic BSK spare parts will be conducive to the extension of
product life and the play of the performance.
The BSK diaphragm pump offers high volume delivery even at low air
pressure and a b road range of material compatibility options
available.Refer to the model and option chart.The BSK pump is
provided with the modularized air motor and fluid section.
The air operated diaphragm pump alternately generates the intake
fluid pressure and positive fluid pressure in the fluid chamber by
using the pressure difference in the air chamber. The ball valve
can ensure the forward flow of fluid.
Pump cycling will begin as air pressure is applied and it will
continue to pump and keep up with the demand. It will build and
maintain line pres -sure and will stop cycling once maximum line
pressure is reached (dis -pensing device closed) and will resume
pumping as needed.
Requirements for Air and Lubrication
EXCESSIVE AIR PRESSURE. Can cause pump damage, personal injury or
- A filter capable of filtering out particles larger than 50 microns
should be used on the air supply. There is no lubrication required
other than the “O” ring lubricant which is applied during assembly
- If lubricated air is present, make sure that it is compatible with
the “O” rings and seals in the air motor section of the pump.