Daniel Piston Check Valve

check valve
Limits the flow of gas to one direction only. Use a check valve between the bubbler and generator to prevent unwanted pressure build up in the generator, and a safety against a low level bubbler. A check valve, such as used on torches, is recommended.
A valve that closes to prevent backward flow of liquid
A mechanical device in a pipe that permits the flow of water or air in one direction only.
A check valve, clack valve, non-return valve or one-way valve is a mechanical device, a valve, which normally allows fluid (liquid or gas) to flow through it in only one direction.

daniel
an Old Testament book that tells of the apocalyptic visions and the experiences of Daniel in the court of Nebuchadnezzar
(Old Testament) a youth who was taken into the court of Nebuchadnezzar and given divine protection when thrown into a den of lions (6th century BC)
Peter Vivian (1784–1860), US Supreme Court associate justice 1841–60. Appointed to the Court by President Van Buren, he advocated states' rights
a wise and upright judge; "a Daniel come to judgment" -- Shakespeare

piston
A disk or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas, used in an internal combustion engine to derive motion, or in a pump to impart motion
A valve in a brass musical instrument in the form of a piston, depressed to alter the pitch of a note
mechanical device that has a plunging or thrusting motion
A piston is a component of reciprocating engines, pumps and gas compressors. It is located in a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod.
United States neoclassical composer (1894-1976)