Emergency Self Closing (Non-Return)
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Emargency valves are designed to close automatically when so ordered by a control device.
Most generally, this order is given in case of over rated speed of the fluid in the piping, the aim of these valves, in case of brekeage a big diameter piping, is to prevent an important out flom from wrocking places.
SEJIN VALVE engrineers, and technicians have designed emergency butterfly valves, acuated by counterweight or cylinder(hydraulic or pneumatics).
The closing speed of the valve disc may be ruled to comply with the specification characteristic of the piping.
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Application
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Seawater
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Desalination Plants
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Corrosive Service
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Features
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The conventional joint use of sluice valve and check valve can be replaced by single emergency self-closing valve of hydraulic and butterfly valve style.
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At emergency(stop power supply) when the vlave should be closed quickly, it is closed automatically without external force preventing reverse flow. Other check vlaves and because the disc is closed slowly at the closed conditon by 80%, when water hammer should be cut quickly, the reverse flow can be cut efficiently without giving troubles on valved and pressure by hitting to the disc
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This has a structure to control the oil quantity by keeping the medium open degree.
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The expenses of installation may be reduced by replacement of two valves with one.