Abstract: A noise reduction device for use in a fluid flow system comprises a central section and an outer annular section. The outer annular section is designed to reduce the velocity of an annular fluid flow relative to a central core fluid flow. The central section of the device has a plurality of apertures, while the annular section has upstream apertures communicating with a pressure reduction chamber and downstream apertures. The upstream apertures of the annular section are smaller than, and off set from, the downstream apertures of an annular section to increase the pressure reduction and further reduce the velocity of the fluid flow in an annular section. A method is also described for reducing noise transmissions from a piping system wherein the fluid flow through the piping system is separated into an annular fluid flow and a core fluid flow, and the velocity of the annular fluid flow is reduced relative to the core fluid flow.

Abstract: A compact, portable and NIST traceable pressure source dynamically generates very low pressures includes at least one adjustable valves in-line with a fluid, such as air, flowing through the valve. A differential pressure is created across a pressure control device downstream from the valve. The differential pressure varies depending on the volume of the gas flow and the amount of resistance to the gas flow. The pressure generating device utilizes a miniature pump to create a pressure, or, alternatively, a vacuum, that causes gas flow. The pressure generating device is compact and capable of providing a very low and stable differential pressure by using a dynamic flow that compensates for temperature changes and volume changes. The compact module may be configured as a plug-in module for existing handheld calibrators for operator ease of use.

Abstract: A multiproduct fuel dispenser for dispensing a plurality of fuels stored in a plurality of reservoir tanks comprising a nozzle for dispensing fuel, fuel delivery lines for delivering fuel from the plurality of reservoir tanks to the nozzle, and a common fuel meter operatively connected to the fuel delivery lines for quantifying the amount of fuel dispensed from the plurality of reservoir tanks, the common fuel meter having an internal volume no greater than 0.1 gallons.