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Larox Flowsys Valves Take Flow Control Technology to New Heights

Press Release   •   Feb 23, 2011 13:59 GMT

The Operation Principle of Larox Pinch Valves

Larox manual and automatic valves are ideal for shut off or control applications that involve abrasive or
corrosive slurries, powders or coarse substances. Our advanced flow control solutions meet even the most
stringent customer specifications.

The operating principle of a Larox valve is simple. In the open position, the valve is at full bore with no flow
restrictions thus making the valve an integral part of the pipeline. During closing, two pinch bars squeeze the
sleeve shut on the centerline. The Larox valves provide a 100% tight shut-off.

The Built-in Quality of The Larox Pinch Valve

Larox valve builds on several quality components. The highly resistant and durable sleeve forms an integral part of the valve structure and is the only part in contact with the medium. Centerline closing minimizes sleeve stretch.

The encapsulated stem mechanism is protected and lubricated to ensure trouble-free operation. Stainless steel stem and sidebars add to improved wear and corrosion resistance. The enclosed Larox valves have
external open/closed position indicators. Optional features include an alarm sensor for remote leakage detection. Maintenance is trouble free as sleeve changes can be done without special tools.

Larox Knife Gate Valves

Larox Heavy Duty Knife Gate Valves are built with a cast body and they feature a heavy-duty stainless steel
blade. Removable seats on either side of the gate provide a bi-directional bubble tight seal, with no metal
parts in contact with the slurry.

In the open position the two sleeves seal against each other in the centre of the valve, providing a full bore
through which the slurry can travel without being in contact with any metallic components. Closing the valve
forces the gate progressively down between the two mating sleeve ends until it reaches the fully closed
position, at which point the sleeves seal tight against either side of the gate, effectively sealing and
completely containing the line pressure.

Global service, local reach
Larox Flowsys Group has more than 90 employees and the number is growing. Headquartered in Lappeenranta, Finland Larox Flowsys Group has subsidiaries in Linthicum, Maryland (USA), Sydney (Australia) as well as in Kouvola (Finland). As more than 90% of the company's net sales come from global exports, the reliable and fast customer service is guaranteed by an international sales and service network, covering over 55 countries.

To learn more about Larox Flowsys and its expanded product offerings and brands, visit

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