Diaphragm Pumps Ltd

LevelP Air Operated Double Diaphragm (AODD) Pumps are becoming the most common pumps for use when Only Air is available or when pumping solid laden liquids or slurries. LevelP Diaphragm Pumps have no seals as the diaphragm acts as the barrier between the Liquid side and the drive side of the pump. When the liquid pressure reaches the air pressure, the LevelP pump reaches a point of balance and stalls without the need for bypasses or overload protection.LevelP Diaphragm Pumps can run dry indefinately and have the ability to self prime to 7 metres or more in some cases. They can handle viscosities up to 20000 Centipoise as standard and some LevelP models can handle cPs into the 100's of 1000's. LevelP Pumps are some of the most reliable AOD's in the marketplace, Self Priming, Dry running, Intrinsically safe, these are just a few of the features of LevelP Diaphragm Pumps. Models include pumps for pumping hygienic products, aggressive chemicals aswell as standard industrial duties. High pressure models are also available for filter press applications or for pumping into closed systems. ATEX regulated LevelP pumps are offered for Zone 1 environments. LevelP Pumps and spares are available from Diaphragm Pumps Ltd, Stoke On Trent, England. As one of the largest stockists of pumps and spares in Europe, we hope we can supply all your LevelP Pump needs.

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Submenu Ancillaries

• Air Control
• Pulsation
• Diaphragm Gauge
• Batch Controllers
• Level Control
• Spill Prevention

Calculators

• Pressure Loss
• Pipe Sizing
• Conversion Tables
• Calculator
• Compatibility

Pneumatic Pump Control

The single float design This 'Roller lever' valve operates with a rigid float and is suitable for mounting outside the tank. Suitable for applications, including:-
Emergency Shut Off / Start
Control of Standby / Assist Pump

If a float system is not suitable, we have the alternative of a dip tube system, For example the ARO® All Pneumatic Liquid Level Sensor, which senses the back pressure (or lack of) in a compatible tube located in the tank and turns on/off the pump accordingly.

Automatic Pneumatic Hi/Lo Control System

The innovative design of the Dual level system is it's use of Bernoulli's Law of Pressure Differential, as Air passes through a venturi to power a pump it generates a negative pressure at the venturi port, if this is monitored, presence of liquid at the port can be detected by an increase in Vacuum and the pump turned off (or On). The downside of this system is the need for a continuos supply of air, which is used even when the pump is not in operation. Albeit only a small amount.

The end of the hose ”low” (1) (or end of extension pipe) is placed at the desired low level in the sump and the end of the hose ”high” (2) is placed at the high level position. As the liquid reaches the high level, the pump will start and run until the liquid level reaches the end of the low level hose. It is a very accurate system, sensing the levels within a few millimetres. The option for a hi-level alarm with horn is also available.

The alternative is our Float switch operated Unit which has two float switches. One, an all Stainless Steel Immersible unit (requires a hole in the side wall) and the other a top mounted Float. This system is closed and does not waste air.

If the depth is shallow 2 Top mounted Floats can be used, allowing a Polypropylene or PTFE float instead of Stainless Steel, therefore giving broader chemical compatibility.