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  2. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    Valve ejected due to mix up with valve threads 3/4"NPSM and 3/4"BSP(F) caused damage to a dive shop compressor room. [92] A valve ejected during filling due to incompatible thread killed the operator by impact to the chest. [38] A valve failed on a diver's emergency cylinder on a diving support vessel during preparation for a dive injuring five ...

  3. EN 417 - Wikipedia

    en.wikipedia.org/wiki/EN_417

    Pierceable gas cylinder Gas cylinder with Lindal B188 valve.. EN 417 is a European Standard concerning non-refillable metallic cartridges for liquefied petroleum gases.The standard specifies material, construction, inspection and marking requirements for cartridges with or without a valve, for use with portable appliances which comply with the requirements of EN 521.

  4. Cascade filling system - Wikipedia

    en.wikipedia.org/wiki/Cascade_filling_system

    P 2 and V 2 the initial pressure and volume of the other cylinder and P 3 is the equilibrium pressure. An example could be a 100-litre (internal volume) cylinder (V 1) pressurised to 200 bar (P 1) filling a 10-litre (internal volume) cylinder (V 2) which was unpressurised (P 2 = 1 bar) (resulting in both cylinder equalising to approximately 180 ...

  5. Mechanism of diving regulators - Wikipedia

    en.wikipedia.org/wiki/Mechanism_of_diving_regulators

    In upstream valve regulators or regulators with an isolation valve at the second stage, such as the bailout valve on a surface supplied helmet or full-face mask, this relief valve function of the second stage may not be available, and a pressure relief valve on the first stage is necessary to prevent the pressure in the hose rising until it ...

  6. Flow coefficient - Wikipedia

    en.wikipedia.org/wiki/Flow_coefficient

    A simplified version of the definition is: The k v factor of a valve indicates "The water flow in m 3 /h, at a pressure drop across the valve of 1 kgf/cm 2 when the valve is completely open. The complete definition also says that the flow medium must have a density of 1000 kg/m 3 and a kinematic viscosity of 10 −6 m 2 /s, e.g. water. [clarify]

  7. Pneumatic valve springs - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_valve_springs

    Pressurized air is pumped into this cylinder which then causes the piston/retainer to rise to the top of cylinder, causing the valve to form an airtight seal with the seat. The compressed gas then becomes the spring, so to speak, but does not have the same traits as springs do at elevated rpm. A small light spring is sometimes fitted between ...

  8. Pneumatic circuit - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_circuit

    The normally closed valves will not permit flow from the inlet port of the valve to the outlet port, normally the flow will be permitted only by changing the position of the valve. In general, valves are designated as 2/2 DCV, 3/2 DCV, 5/2 DCV, 5/3 DCV etc., in which the first number indicates number of ports and second number indicates number ...

  9. Valvetrain - Wikipedia

    en.wikipedia.org/wiki/Valvetrain

    Cutaway of a dual overhead camshaft engine 1969 AMC V8 overhead valve engine. The rocker cover has been removed, so the pushrods, rocker arms, valve springs, and valves are visible. A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. [1]