Soft-seal valves for demanding tasks

The core of the soft-seal valves is a specially developed rubber sleeve. Through a compressed-air supply interface, compressed air or a fluid will be provided to stop the product flow with a differential pressure of about two bar. The differential pressure leads to the closing of the sleeve, whereby the product flow is shut off immediately. (See Fig. 1.)
Since the sleeve is variably actuated with compressed air or fluid, a regulation of the medium flow is also possible.

If the product flow should be released again, the housing is simply vented. The restoring force of the sleeve now comes into effect; this restoring flow guarantees a constriction-free flow within an extremely slow period of time. (See Fig. 2.)

In general, the soft-seal valves from AKO are designed for a pressure range from two to six bar medium pressure.
Thanks to the sophisticated combination of sleeve, connections and housing, soft-seal valves meet the highest demands on seal tightness and reliability of the shut-off function. At the same time, a long service life and life time of the valve is guaranteed.

Our Sales & Support team is happy to advise you in regard to your requirements on a soft-seal valve

The advantages of soft-seal valves basically come into play wherever problematic transported media are transported in pipeline systems.
The use of this pneumatic solution is particularly recommended for abrasive solids and sealing liquids, as well as bulk materials and high-viscosity media. Suspensions and contaminated liquids are frequently shut off in conjunction with a soft-seal valve solution.
Due to the constriction-free flow of the valves, blockage-free transport can be guaranteed even in case of difficult solids such as granulate, pellets, powder, sand, cement or gravel.

Soft-seal valves from AKO Armatures are used worldwide in all kinds of industries.
Usually in combination with problematic transported media - due to reliability, but more and more often even for unproblematic media.

• Bulk material equipment
• Cement industry
• Suction extraction systems
• Water-jet cutting systems
• Metering systems
• Vacuum toilet systems
• Powder-coating systems
• Silo-filling units
• And many more

In addition to the abovementioned advantages, the positive product characteristics of air-operated and mechanical soft-seal valves include a crevice-free structure, maintenance-friendliness and a low intrinsic weight.

To further optimise the economic efficiency of soft-seal valves, modern valve housings have an elliptical shape. In this way, the compressed air is required for closing or regulating is significantly reduced, therefore saving energy.