International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage
(6225) Pneumatic butyl valve (for pipeline distribution systems)
An inflatable O-ring mounted between an alfalfa valve seat and valve lid. When deflated, the water flows from the alfalfa valve. When inflated, the O-ring forms an annular seal, stopping flow.

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Irrigation

Dictionary - Automatic Irrigation Systems Terms

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