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  Flap valves are used in all hydraulic systems where one way flow must be assured.
Production ranges:
• from 500 to 3000 mm nominal diameter
• from 1 to 20 bar nominal pressure
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Valve components :
• body and shutter
• seals
• pins |
Materials:
• Welded steel
• Neoprene, special profile
• High tensile steel - Stainless steel |
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Flap Valves
2500 x 2000mm, 0,5 bar
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Applications
• Check valves on pump delivery
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Features of Calzoni' s Flap Valves
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• Adoption of a special recess housing the shutter in open position
• Accuracy of machinings
• High siffness of structural parts
• Replacement of the seal without dismantling the shutter
This allows to have extremely reduced head losses, no leakages, and easy maintenance.
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Operational characteristics:
The shutter is hinged at its top on pins housed in the valve body;
at the beginning, valve opening takes places by the effect of the fluid thrust and is completed automatically by the hydraulic mechanism.
Valve operation is hydraulically controlled.
Valve closure is assured in case of lack of the energy. Shutter closure takes place automatically at the interruption of fluid delivery.
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