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The Spectacle Blind, Paddle Blind and Paddle Spacer are simple safety devices that install between two pipe flanges.

•Spectacle Blinds are generally installed as a permanent device. The geometry gives a quick visual indication to its orientation and whether or not it is safe to begin downstream work. During normal operation the open end is installed as a spacer to allow uninterrupted flow. To stop the flow in the pipeline, the blind end is rotated or installed into place between the flanges. This positively isolates the downstream piping and equipment.

•Paddle blinds are basically the solid half of a specacle Blind. A Paddle Blind is often made from one solid metal disc and will usually have a thin length of metal attached to one end to be used as a handle. A finished assembly will resemble the shape of a paddle, hence the name. Generally, these types of blinds are applied in piping systems that do not require constant maintenance. The Paddle Blins is used more as a temporary blocking device to stop flow in a process piping system.

•A Paddle Spacer is the open half of a Spectacle Blind. It is often made from one solid metal disc and will usually have a thin length of metal attached to one end to be used as a handle. A finished assembly will resemble the shape of a paddle with an opening through its center. The Paddle Spacer is used in place of a Paddle Blind when the piping system is to be put back into operation.