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Process Diaphragm Pumps
 
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The LEWA process diaphragm pumps for high pressure process engineering are the standard for tightness in the high pressure range. Here also LEWA has set the standards and consistently further develops the diaphragm pump technology. With LEWA process diaphragm pumps even critical, toxic or inflammable fluids can be conveyed safely. Also extremely low viscosity, non-lubricating fluids or abrasive suspensions are handled without any problems. The pressure range goes up to 1200 bar. They meet API 674 and API 675 standards.
Apart from specifically adapted process diaphragm pumps LEWA also develops and supplies complete pump systems, which can be easily and directly integrated into the complete installation.
LEWA Process Diaphragm Pumps

All components including control and protection installations are appropriately designed and optimized for the respective application. All national and international standards are met.

Expandable System Solutions
Instrumentation for the pump
  Flow adjustment via frequency inverter
  Interfaces to the process guiding system
  Condition monitoring systems for electronic control LEWA CMS (Condition Monitoring System)

Advantages of LEWA Diaphragm Pump Heads
Hermetically tight
  Durable metal or PTFE sandwich diaphragm with diaphragm monitoring system
  Protected against overload by adjustable pressure limiting valve
  Absolute safe dry operation
  High metering accuracy by linear pump characteristics
  Gentle conveying of sensitive fluids
  Minimum maintenance costs due to low-wear components
  Highly economical, low life-cycle costs

LEWA Diaphragm Pump Head with PTFE -
Diaphragm Up to 350bar (M500 SERIES)
LEWA Diaphragm Pump - M500 Series LEWA Diaphragm Pump - M500 Series

LEWA diaphragm pump heads of this series are the economical solution for a variety of metering- and conveying tasks up to 350bar. Due to the revolutionary diaphragm position control highest operational safety can be achieved even for critical fluids. Environmentally damaging, dangerous, sensitive or abrasive fluids are therefore only conveyed with zero leakage pumps today. Sandwich diaphragms with diaphragm monitoring system are therefore standard design of all LEWA diaphragm pumps. Damage of the diaphragm is reliably indicated. The pump still remains tight and operation can be continued for a limited period of time.

Advantages of M500 Series
Hermetically tight, zero leakage
  Universal application
  Temperature range from -40° C to + 150° C
  Insensitive against particles
  Suitable for suspensions and high viscosity fluids
  The freely oscillating diaphragm allows unrestricted flow through the operating chamber
  Long diaphragm service life due to hydraulic diaphragm position control
  Absolute safe dry operation
  Unobstructed flow channels in the operating chamber as diaphragm oscillates freely
  Absolute safe dry operation
  Suction pressure safe to 350bar (5000psig) by solid rear diaphragm support
  Diaphragm monitoring system
  Internal protection against overpressure

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LEWA Diaphragm Pump Head with PTFE -
Diaphragm Up to 800bar (M800 SERIES)
LEWA Diaphragm Pump - M800 Series LEWA Diaphragm Pump - M800 Series

The high pressure diaphragm pump heads of the M800 series represent an extension of the proven M500 series with a discharge pressure up to 800bar. Due to an integrated diaphragm monitoring system in combination with a PTFE sandwich diaphragm high process safety is guaranteed. With this series the use of zero-leakage diaphragm pumps, exceeding the present pressure limits of plastics diaphragms, is considerably more economical than using metal diaphragm pump heads.

Other options include special valves; a variety of connection dimensions; heating and cooling equipment; easy to clean pump heads (CIP); hygienic designs for food stuffs; pharmaceutical and bio-technology applications; and special materials.

Advantages of M800 Series
Hermetically tight, zero leakage
  Maximum pressure 800bar (11600psig)
  Temperature range from 20°C to +80°C (-5 to +175°F)
  Diaphragm oscillating freely in the smooth operating chamber
  Suitable even for difficult fluids, fluids with particles or of high viscosity
  Long diaphragm service life by hydraulic diaphragm position control
  Absolute safe dry operation
  Suction pressure safe by solid rear diaphragm support
  Diaphragm monitoring system
  Safety against overload by internal pressure limiting valve

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LEWA Diaphragm Pump Head with PTFE-
Diaphragm Up to 1200bar (M400 SERIES)
LEWA Diaphragm Pump - M400 Series LEWA Diaphragm Pump - M400 Series

Diaphragm pumps with metal diaphragm of this series are used when high pressures up to 1200bar or high temperatures up to 200C must be handled or when high diffusion resistance is required. This series offers extremely high safety standards by limiting the diaphragm deflection in both directions so that diaphragm overload by faulty operation is safely prevented. A big safety plus is offered by the sandwich diaphragm protection system.

Advantages of M400 Series
Hermetically tight, zero leakage
  Diffusion resistant diaphragms in different materials
  Maximum pressure 1200bar (17400psig)
  Temperature range from -40°C to +200°C (-40 to + 390°F)
  Safe against over-stretching of diaphragm and faulty operation
  Long service life by even displacement of diaphragm
  Suction pressure safe up to maximum operating pressure

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