Pneumatic
Double Diaphragm Pumps
Features
- Non Sparking - Non Electrical,
totally safe in hazardous environments.
- Completely submersible.
- Can be run dry for extended periods
without damage.
- Self Priming
- No seals or glands to wear out.
- Long lasting wear parts.
- Fluids being pumped are not subjected
to high velocities.
- Discharge can be throttled until pump
stalls - without damage to pump - can be re-started again by
opening discharge valve.
- Easy to maintain - quick strip down -
no special tools required.
- Can pump fluids which contain
particles.
- Can pump high viscosity fluids and
abrasive slurries.
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Applications
Our diaphragm pumps operate on a simple mechanism involving few moving
parts. They are efficient and easily serviced. With the proper selection
of pump materials they are capable of handling a wide variety of fluids.
Apart from pumping regular fluids like water, sea water and most fluids
having viscosities like water, some problematic fluids and applications
are:
Abrasive Slurries
These diaphragm pumps are well suited for pumping of abrasive slurries.
Centrifugal pumps generate high fluid velocities and abrasive slurry
rapidly wears these types of pumps. Editool diaphragm pumps are
recommended for such applications because of the low fluid velocities
and minimal erosion wear. Moreover there are no high-speed shaft seals
or packing that have to be replaced as in conventional pumps. Dredging,
drilling mud and similar slurries are well handled.
Viscous Fluids
Another application where Editool Diaphragm Pumps, are well suited is
the pumping of viscous fluids such as asphalt, grout, grease, molasses
and similar media. Viscosity of these fluids is variable depending on
temperature and other factors and therefore the energy expended to pump
them also varies. In a pneumatically driven diaphragm pump the output is
totally variable making it ideally suited for such fluids. In fact
pneumatic diaphragm pumps can be loaded up to its stalling limits
without any pump damage. In general these pumps consume less power than
displacement pumps in similar situations.
Technical Data for Pneumatic Double Diaphragm Pumps
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| Model |
Weight Kgs |
Air Inlet Size |
Fluid Inlet |
Elastomer materials |
Casing materials |
Fluid Outlet |
| DP 50 N |
28 |
½ NPT |
2 inch NPT |
Neoprene |
Aluminum |
2 inch NPT |
| DP 40 N |
18 |
½ NPT |
1 ½ BSP |
Neoprene |
Aluminum |
1 ½ BSP |
| DP 50 B |
28 |
½ NPT |
2 inch NPT |
Buna N |
Aluminum |
2 inch NPT |
| DP 40 B |
18 |
½ NPT |
1 ½ BSP |
Buna N |
Aluminum |
1 ½ BSP |
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Operation Principle
These Diaphragm pumps have a simple operating principle. Pressurized
air is alternatively directed to and exhausted from two chambers. This
movement of air within the pump drives diaphragms alternatively which in
turn draw in and pump out the process fluid with each stroke.
Note on elastomers
These diaphragm Pumps are available with either neoprene or Buna N
diaphragm, balls and seats. Pump casings are aluminum or polypropylene.
Neoprene is ideal for general purpose applications such as water based
slurries and sea water or water. Neoprene diaphragms have the highest
durability.
Use Buna N for oil based fluids such as hydraulic oils, motor oils,
kerosene, fuel oils etc. |