Double diaphragm
Standard version for handling most chemicals, reliable in the most common applications.
Air-operated pumps
Double diaphragm
Suitable for handling aggressive, corrosive or viscous liquids or liquids containing suspended solids. They are self-priming, can be installed above the liquid level, below it (flooded suction) or submerged, and are also suitable for use in explosive atmospheres.
- Up to 1,000 l/min
- Self-priming
- Can also run dry or against a closed discharge
- Food-grade versions
1,000l/minMaximum flow rate
80mMaximum head
12mmSolids passage
8barCompressed air
2 models
Available versions
The air distribution system is anti-stall and anti-freeze and requires no lubrication. The pumps can run dry or against a closed discharge for short periods without damage.
Pump head: PVDF, PP, POM, aluminium or AISI 316L
PTFE double diaphragm
Body, balls, O-rings and diaphragms in Teflon (PTFE) ensure chemical compatibility with virtually all liquids.
Pump head: PTFE
Operation
Operating principle
Compressed air (in yellow) is fed alternately to the two internal chambers: while one diaphragm draws in the liquid (in blue), the other delivers it to the discharge.
Suction
Compressed air fills the right-hand internal chamber and moves the opposite diaphragm, which lifts the ball of the lower valve: the liquid is drawn in. At the same time the left-hand chamber is in the exhaust phase.
Discharge
Compressed air fills the left-hand internal chamber; in the opposite chamber the ball of the upper valve lifts and the liquid is delivered to the discharge. At the same time the other chamber is in the suction phase.
Installation
Installation types
Being self-priming, the pump can be installed in virtually any system, including in special versions.
Flooded suction
Installation at the base of the tank, allowing it to be emptied completely. At the end of the transfer the pump can run dry for a short period.
Self-priming
Installation above the liquid level: the pump initially runs dry, then draws in the liquid.
Suspended
Special version with the mounting feet on the top, made possible by the self-priming capability.
Submerged
Special version for submerged installation, subject to checking chemical compatibility with the liquid.
Below a hopper
For viscous liquids: the head of liquid in the hopper assists the pump feed. A high-pressure air supply and a suction pipe of larger diameter than the pump connection are required.
Drum-mounted
Special version for installation on the lid of a drum.
Trolley-mounted
Installation on a trolley, for quick relocation.
Suction and discharge
The position of the suction and discharge ports is specified when ordering.
Technical data
Performance and configurations
Performance varies with the working back pressure (head), with the viscosity and density of the liquid and with the supply air pressure. The flow rate is adjusted via the air pressure and/or by throttling a valve on the discharge.
PP, aluminium, PVDF, AISI 316, POM
For handling most chemicals.
| Max flow rate (l/min) | Dry / primed suction lift (m) | Max head (m) | Solids passage (mm) |
|---|---|---|---|
| 4 | 3 / 9.8 | 60 | 2 |
| 7 | 3 / 9.8 | 60 | 2 |
| 20 | 5 / 9.8 | 70 | 2.5 |
| 35 | 5 / 9.8 | 70 | 3 |
| 55 | 5 / 9.8 | 80 | 3.5 |
| 65 | 5 / 9.8 | 80 | 3.5 |
| 100 | 5 / 9.8 | 80 | 4 |
| 120 | 5 / 9.8 | 80 | 3.5 |
| 170 | 5 / 9.8 | 80 | 7.5 |
| 250 | 5 / 9.8 | 80 | 3.5 |
| 400 | 5 / 9.8 | 80 | 8 |
| 700 | 5 / 9.8 | 80 | 8.5 |
| 1,000 | 5 / 9.8 | 80 | 12 |
PTFE
Body, balls, O-rings and diaphragms in PTFE, compatible with virtually all liquids.
| Max flow rate (l/min) | Dry / primed suction lift (m) | Max head (m) | Solids passage (mm) |
|---|---|---|---|
| 24 | 4 / 9.8 | 70 | 3 |
| 55 | 4 / 9.8 | 80 | 3.5 |
| 110 | 5 / 9.8 | 80 | 4 |
Power supply options
- Compressed air, 8 bar
Diaphragms
- Hytrel + PTFE
- Santoprene + PTFE
Body
- PVDF
- PP
- POM
- Aluminium
- AISI 316
- PTFE
Technical advice
Tell us the liquid to be transferred and the characteristics of the system: we will recommend the most suitable materials, size and type of installation.