Diaphragm pump

Our Lutz diaphragm pumps combine the properties of the predecessor model with new technical features. It offers a wide range of possible applications, including in the automotive industry, waste water treatment, transferring chemicals, pumping low-viscosity and viscous fluids and in the food sector.

Structure of the diaphragm pump

(1) Outlet

(2) Outlet pipe

(3) Outlet check valve

(4) Air valve

(5) Air chamber

(6) Diaphragm

(7) Liquid chamber

(8) Diaphragm - connecting shaft

(9) Inlet ball valve

(10) Inlet pipe

(11) Inlet

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Special features of our double diaphragm pumps?

Optimised air control valve

Increases the efficiency of the pump and reduces the air consumption (depending on the operating point).

Elastomer diaphragm

Use of rubber compounds with embedded nylon fabric to increase mechanical strength in order to extend the service life of the pump. The most common elastomers are based on nitrile butadiene rubber (NBR).

Flow-optimised hydraulic system

Enables higher flow rates due to lower, internal pressure losses.

TFM Membrane

Modified PTFE with refined molecular structure for improved safety and reliability.

Produktvorteile im Überblick

hohe hydraulische Leistung
optimierter Luftverbrauch
eisfreies Luftsystem
wartungsoptimierte Konstruktion
einfache Installation
integrierter Schalldämpfer bis zur Modellgröße DMP 1"
trockenlaufsicher
absolut ölfrei
blockadefreier Betrieb

How our diaphragm pump works:

The overpressure created in the chamber (A) closes the suction valve and opens the pressure valve, allowing the liquid to enter the pressure line. At the same time, the same process takes place in reverse order in the negative pressure area of chamber (B). The pressure valve closes and the suction valve opens so that the liquid can flow in on the suction side.

Installation options for the compressed air double diaphragm pump

Self-priming

If the suction joint is above the liquid level, the pump must suck in the pumped liquid itself. When running dry, the diaphragm pumps can self-prime up to 4.5 m wc and when the suction line is full, a suction head of up to 9 m wc can be achieved.

Submerged operation

Pumps of sizes 1 1/2” and 2” can be submerged in liquids and operated there, provided the pump material is sufficiently resistant and the air outlet is above the liquid level.

Stationary or mobile installation

The pumps can either be mounted stationary or transported as required to different application sites to empty the liquids from different containers.

Flooded suction

If the liquid level is above the suction joint, this is referred to as positive feed. If the maximum inlet pressure is exceeded, the suction line should have appropriate shut-off valves

Hanging construction

For special process requirements, the pump can also be installed in a hanging position.

Our products

Our complete range of diaphragm pumps

Plastic

PVDF

Compressed air

Double diaphragm pump DMP model 3/8" plastic

for small systems and in laboratories

Description: The double diaphragm pump is suitable for pumping small quantities, in laboratories and for occasional filling operations Typical applications: Chemical circulation and feeding, liquids with solid particles such as paints and varnishes, electroplating liquids, etc. integrated silencer up to model size DMP 1" highly resistant TFM (PTFE) diaphragms (modified PTFE) Features & advantages High hydraulic performance Maintenance-optimised design and easy installation Self-priming (even when dry) Reinforced elastomers and thermoplastic diaphragm Absolutely oil-free blockage-free operation

Diaphragm pump

Structure of the diaphragm pump

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Small quantities

Drum, IBC and tank emptying

Explosion protection

Large-scale industry & Plant feeding

Accessories

Foodstuffs