A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z
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This non-return valve design incorporates a piston to damp the disk during operation.
A pipeline shut-off device, whereby a flat disk is forced between two flanges. Line blinds are less expensive than valves, but require much more time to operate.
See multi-turn