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The nozzle and flapper mechanism is a displacement type detector which converts mechanical movement into a pressure signal by covering the opening of a nozzle with a flat plate called the flapper. [1] This restricts fluid flow through the nozzle and generates a pressure signal.
Double dump valves have two trap-door flap plates which open and close on an alternating cycle. The top gate opens to allow collected material to drop through onto the bottom gate. The top gate then re-closes to prevent air leakage above the valve. The bottom gate then opens to allow material to pass completely through the valve.
A dual check backflow preventer is similar to a double check valve in operation. It has two independent spring-loaded check valves. However, dual check valves usually do not include shutoff valves, may or may not be equipped with test cocks or ports, and is generally less reliable than a double check valve.
Stanley is recalling 2.6 million mugs sold in the U.S. after the company received dozens of consumer complaints, including some users who reported getting burned and requiring medical attention ...
Cuban authorities struggled to return power to the island on Thursday morning after Hurricane Rafael knocked out the country`s electrical grid, leaving 10 million people in the dark. The grid ...
Cranberry Mimosa. Iowa, Kentucky, North Carolina, South Carolina, Virginia, Louisiana, Hawaii . Seven states seem to prefer a Christmas brunch drink for the holidays.
A blowout preventer (BOP) (pronounced B-O-P) [1] is a specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil or natural gas from a well. They are usually installed in stacks of other valves.
an oval access door into a part of the boiler, for example the shell or, in a water tube boiler, the top drum or chamber, large enough for a worker to enter and used for maintenance and cleaning. Manholes are sealed with a removable door from the inside. As they are oval, this door may be turned and lifted out through the hole.
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