A electrical valve that permits charging of two batteries from one charger without paralleling the batteries.



Related Terms

CLOSE-OFF RATING

  1. The maximum allowable pressure drop to which a valve can be subjected at commercial shutoff. 2. The maximum allowable pressure drop between the outlet of a three-way valve and either of the two inlets, or between the inlet and either of the two outlets.

COMPRESSOR VALVE

A valve in a compressor, usually automatic, which operates by pressure difference (less than 5 pounds per square inch or 35 kilopascals) on the two sides of a movable, single-loaded member and which has no mechanical linkage with the moving parts of the compressor mechanism.

DOUBLE BLOCK AND BLEED SYSTEM

A valve system configuration in which a full-flow vent valve is installed in a pipeline between two shutoff valves to provide a means of releasing excess pressure between them.

DUAL-GRAVITY VALVE

A float-operated valve that operates on the interface between two immiscible liquids of different specific gravities.

DRY TEST METER

Gas-flow rate meter with two compartments separated by a movable diaphragm which is connected to a series of gears that actuate a dial; when one chamber is full, a valve switches to the other, empty chamber; used to measure household gas-flow rates and to calibrate flow-measurement instruments.

FOUR-WAY VALVE

A valve at the junction of four waterways which allows passage between any two adjacent waterways by means of a movable element operated by a quarter turn.

COUETTE VISCOMETER

A viscometer in which the liquid whose viscosity is to be measured fills the space between two vertical coaxial cylinders, the inner one suspended by a torsion wire; the outer cylinder is rotated at a constant rate, and the resulting torque on the inner cylinder is measured by the twist of the wire. Also known as rotational viscometer.

DIFFERENTIAL MANOMETER

An instrument in which the difference in pressure between two sources is determined from the vertical distance between the surfaces of a liquid in two legs of an erect or inverted U-shaped tube when each of the legs is connected to one of the sources.

EDUCTOR

  1. An ejector-like device for mixing two fluids. 2. See ejector.

ANEROID VALVE

A valve actuated or controlled by an aneroid capsule.

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