An Environment Agency spokesman said: "While the Agency maintains the Prestatyn Gutter we do not maintain the flap valves
Leg veins contain flap valves
designed to direct the flow of blood in an upward direction on its return to the heart.
While the fan shroud took the grand award, other plastic uses honored by the SPE include the grille opening reinforcement on the Ford Focus; the active intake manifold with plastic flap valves
on the Rover 75; the soft TPO skin instrument panel for the Pontiac Bonneville; the lower radiator seal made from recycled fires on the Jeep Grand Cherokee; the plastic body panels on the Smart car, and molded-in-color fascias on the DaimlerChrysler Neon.
of 1 1/2", both fitted with perforated caps and rubber flap valves
(made from an inner tube) on the bottom end.
Pumps features no seals to leak, no check valves or flap valves
to clog, dry running capability, and self-priming suction lift to 26 ft.
In addition, the manifold incorporates Mann+Hummel's patented overmolding process using dissimilar materials to create all-plastic flap valves
. The valve frame is molded from Zytel nylon 66 and is ultrasonically welded to the manifold, resulting in the elimination of assembly steps.
. These are essentially check valves at the output of a pipe or wall opening to prevent entrance of backwater from the outside.