Spirax Sarco Orifice Plate System 01122020 1 www

Spirax Sarco Orifice Plate System 01/12/2020 1 www. coulton. com

How they work. . Flow dp 01/12/2020 2 www. coulton. com

Orifice calculations. . . l. The pressure drop across an orifice plate is used to derive the rate of flow using. . . BS 1042 l ISO 5167 l ASME MFC - 3 M (1989) l l. Flow = K 01/12/2020 d. P 3 www. coulton. com

Orifice Plate Output Flow Error 1: 1 Flow Error 2: 1 01/12/2020 4 www. coulton. com

Traditional M 240 G system 01/12/2020 5 www. coulton. com

Pressure transmitters FCX-A/CII Dual Temperature Compensation Eprom 01/12/2020 Silicon Sensor 6 www. coulton. com

Pressure transmitters FCX-A/CII l Both Types use Measuring cell with floating sensor – Floating silicone sensor in the cell neck, to improove the static pressure, overload and temperature characteristics. – Protection diaphragm in the cell body allows an overload pressure corresponding to the maximum static pressure without damage of the sensor. 01/12/2020 7 www. coulton. com

Pressure transmitters FCX-A/CII l Capacitance silicone sensor – The micro machined silicone sensor is based on the capacitance measuring principle. Capacitance C 1 & C 2 change with applied differential pressure. – Cell protected from temperature variation by silicon fabrication and minimmal physical size. – Stress forces are balanced by floating cell design. 01/12/2020 8 www. coulton. com

Pressure transmitters FCX-A/CII l Matching Convolutions reduce volume Convolutions are machined on the body. Diaphragm is electron beam welded to the body Diaphragm is pressed to body. l ü ü ü Benefits No damage on over pressure Improved Temperature Spec Reduced Stress 01/12/2020 9 www. coulton. com

01/12/2020 10 www. coulton. com

ORIFICE PLATE FLOWMETERS l. Advantages: l Low cost, especially on large sizes l No need for recalibration l Widely accepted l. Disadvantages: l Poor turndown (4: 1 typical) l Long installations l Subject to wear. 01/12/2020 11 www. coulton. com