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2. Check valve - Wikipedia

   en.wikipedia.org/wiki/Check_valve

   A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

3. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   A drain-waste-vent system (or DWV) is the combination of pipes and plumbing fittings that captures sewage and greywater within a structure and routes it toward a water treatment system. It includes venting to the exterior environment to prevent a vacuum from forming and impeding fixtures such as sinks, showers, and toilets from draining freely ...

4. Relay valve - Wikipedia

   en.wikipedia.org/wiki/Relay_valve

   The two-way check valve is a pneumatic device that has two inputs and one output; each input is connected to one these reservoirs. Only the air that is at the higher pressure is allowed to pass through to the check valve's output, which then passes through the tractor-protection valve, and then travels onward towards the trailer's air-tank and ...

5. Tesla valve - Wikipedia

   en.wikipedia.org/wiki/Tesla_valve

   The filaments ricochet off the periodic structures, deflecting increasingly sharply before being rerouted around the 'islands' and mixing. A Tesla valve, called a valvular conduit by its inventor, is a fixed-geometry passive check valve. It allows a fluid to flow preferentially in one direction, without moving parts.

6. Hydraulic analogy - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_analogy

   A simple one-way ball-type check valve, in its "open" state acts as a diode in its conducting state. A pressure-actuated valve combined with a one-way check valve acts as a (field-effect) transistor. Like a one-way check valve, a diode blocks current that flows the wrong way.

7. Anti-dribble valve - Wikipedia

   en.wikipedia.org/wiki/Anti-dribble_valve

   Anti-dribble valve. An anti-dribble valve is a component of a fuel injection system used for diesel engines. Its main function is to provide precise timing of fuel injection, particularly at the end of the injection time. If fuel was allowed to 'dribble' after the main phase of injection, this fuel would be too late for good combustion and so ...