Series 220 Sonic Nozzle

The Series 220 sonic nozzles are mass flow instruments designed for the accurate measurement and control of gas flow. The nozzles can handle flow from 0.04 to 10,000 standard cubic feet per minute. The internal design of the nozzle consists of a circular arc that leads to the minimum throat area.

Tangent to the circular arc on the exhaust side is a conical diffuser section. Common applications of the sonic nozzle include use as a calibration standard, gas flow meter, flow controller and flow limiting device.

Standard nozzles are sized according to the inlet pressure available to give continuous and overlapping flow ranges. Sizes range from a minimum throat diameter of eleven thousandths of an inch to a maximum of one inch.

These nozzles may be purchased individually or in sets of seven or ten nozzles, that include the upstream and downstream flow straighteners. Taps are provided in the upstream flow straightener for pressure and temperature sensing. A pressure tap is provided in the downstream flow straightener to check for a critical ratio across the throat.

The nozzles, as well as the flow straighteners, are available with AN-8, AN-16 or AN-32 flare tube fittings, and are suitable for use psia: 0 to 3,000 (kPa: 0 to 20,680, bar: 0 to 206.8) inlet pressure.