Dispersing

Dispersing means the mixing of at least two substances that do not or only hardly mix or chemically bind. In the dispersing process, a substance, also called dispersed phase, is dispersed as finely as possible in another substance, the dispersing agent. In this case, a heterogeneous mixture is produced. The range of liquids, in which different solids can be contained, is various: From skin creams, lotions, to slurries, paint or solid-containing food, such as orange juice.

With the diaphragm metering pumps and streamlined suspension valves, LEWA offers the suitable solution for the metering of fluids with solid particles.

Solutions

During dispersion, solid particles in between the guiding surfaces of the pumps can lead to jamming of the movable closing unit. If solid particles are trapped, this prevents the complete closing of a valve. Thus, the fluid can flow back through the remaining gap. If the valve opens only slightly (e.g., with very small stroke lengths or high spring load), solid particles larger than the opening gap may not pass of i.e. a valve.

At low flow velocities (small stroke length, small stroke frequency), solid particles can be deposited in the flow dead spaces of the valve. The consequences of this are non-constant flow rate, increased wear, increase in pressure loss, reduced flow rate up to the failure of a pump.

The following solutions are offered by LEWA diaphragm metering pumps with suspension valves for dispersing:

  • Different material pairings in the pump head make it possible to optimally convey the various dispersions
  • Hermetically tight: no foreign matter can enter
  • Easy handling of abrasive dispersions
  • Use of suspension valves:
    • Streamlined
    • For highly viscous fluids, the pressure loss is counteracted, so that enough fluid can be metered and the volume flow can be ensured
    • LEWA intellidrive enables the extension of the suction stroke. This allows the pump to be adapted to different viscosities
    • Speed of the pump can be adjusted to customer requirements, as dispersions sometimes have to be dosed slowly
    • Flexibility: cooled or heated fluid possible
    • Heated pump heads with hot fluid
    • Product is not stressed during the metering process: no segregation of the fluid will occure
LEWA intellidrive diaphragm metering pump

Background

Dispersing – what is it?

If two substances cannot be dissolved in each other or chemically combined, they form an interface. This interface prevents the formation of a dispersion, a heterogeneous mixture of two substances. If these substances are to be mixed together, dispersing is applied. This causes the enlargement of the boundary surfaces, which effectuates a balance of the two substances to be mixed.

More precisely, this is a momentary comminution of the liquid and the solid particles to almost the same size. In addition, long-term stability of the dispersion can be achieved by using emulsifiers and stabilizers. 

Industries

Chemicals

LEWA supplies you with individual chemical pumps and customized system solutions for various areas of application in the chemical industry.

Pharma, Life Science & Biotech

LEWA supplies pumps and systems for the pharmaceutical, life sciences, and biotech industries that comply with all hygienic requirements. We're happy to help you!

Food & Beverage

Use LEWA pumps and system solutions for your homogenization processes in the food and beverage industry. Ask our experts for more information!

Other Industries

As specialists in fluid handling, we of course also have experience in many other industries. Simply contact our consultants to find out more!

Products

LEWA ecoflow® diaphragm metering pump

LEWA ecoflow diaphragm metering pump all around talent The ecoflow® diaphragm metering pump from LEWA is a true all-around talent in the field of metering and mixing and can be used in all industries.

LEWA ecoflow® sanitary/hygienic diaphragm metering pump

ecoflow sanitary hygienic pump The ecoflow® diaphragm dosing pump in sanitary / hygienic version is the ideal pump for food and pharmaceutical production.

LEWA ecosmart® diaphragm metering pump

LEWA ecosmart diaphragm metering pump The LEWA ecosmart® diaphragm metering pump is the inexpensive metering pump for various applications and can be ordered quickly and conveniently through the online store.

LEWA ecodos® mechanical diaphragm metering pump

LEWA ecodos diaphragm metering pump The ecodos® mechanical diaphragm metering pump from LEWA is suitable for all pumping and metering tasks in the low-pressure range.

LEWA ecodos® sanitary/hygienic diaphragm metering pump

LEWA ecodos sanitary/hygienic diaphragm metering pump The LEWA ecodos® diaphragm metering pump with its sanitary/hygienic design is the ideal pump for food and pharmaceutical products in the low-pressure range.

LEWA intellidrive® diaphragm metering pump

LEWA intellidrive diaphragm metering pump Use servomotor-controlled diaphragm metering pumps for precision metering and mixing of fluids in metering plants and systems.

LEWA MAH, MBH, MLM Micro-metering pumps

LEWA micrometering pumps The LEWA M series micro-metering pumps are particularly suited to the smallest of flow rates for applications in chemistry, oil and gas or gas odorization.

LEWA FC laboratory pumps

LEWA FC laboratory pumps The smallest flow rates and precise metering make LEWA micro-metering pumps of the FC series the first choice for laboratory pumps.

Wilden standard air-operated diaphragm pump

Wilden air-operated pump Wilden standard air operated double diaphragm pumps from your industrial pumps sales partner. We are happy to help.

LEWA Pump Skids

LEWA Pump Skids Ready-to-operate, custom-designed pump skid units with a small-footprint design for the oil and gas production industries. Consult us!

Customer-Specific Metering, Mixing or Filling Systems from LEWA

LEWA production units LEWA develops customized production units for metering, mixing, and filling fluids. Contact us and let us advise you!

Customer-Specific Metering Systems from LEWA

LEWA customer specific metering systems LEWA provides you with custom-designed metering systems according to your specifications. Trust in our experience gained from 60 years of metering technology.

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© 2019 LEWA GmbH
© 2019 LEWA GmbH