Online Blind Valve

Advantages of Risansi online blinds over traditional blinds

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  Blinding Plates or spectacle plates (sometimes called Paddle Blinds or Figure Eight) have been in existence for many years and for good reason they are simple leakproof shutoff.

  A binding plate or figure eight instead between two gasketed companion flanges will provide an absolute dead shutoff. But they have maintenance problems. Refer comparison table.

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  Hammer Blinds have seals mounted on spectacle plate thus exposing them to sun, and accidental mechanical damage.

  Due to change in temperature, expansion or contraction result in piping misalignment effecting alignment of spectacle plate and the seal. to spread the body flanges, bolts have to be turned one by one and the operator has to continousely jump over the line; which could be very cumbersome if the line size is very large. While tightening the bolts 'gall' or 'freeze' frequently occurs.

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  RISANSI ONLINE BLIND is mounted on the pipe, the body flanges need not be spread plus the bolts are of increased diameter and tackwelded, hence the seal is unaffected by piping misalignment.

  The seals are mounted inrenally (protecting the from sun and accidental damage) yet they can be replaced ONLINE, the open or closed position of the line is simultaneously indicated and is clearly visible because of which chances of accidents are totally eliminated AN IMPORTANT SAFETY FEATURE.