The VSAN Orifice Flow Meter is a reliable and economical differential pressure flow measurement system designed for accurate measurement of liquids, gases, steam, and process fluids in industrial applications. Based on the internationally recognized Differential Pressure (DP) Measurement Principle, the flow meter consists of a precision-engineered Orifice Plate, Orifice Flanges, Impulse Piping, and a Differential Pressure Transmitter, which together provide accurate and repeatable flow measurement.
The VSAN Orifice Flow Meter is one of the most widely used primary flow elements in the process industry due to its simple construction, rugged design, and high reliability. It is suitable for measuring a wide variety of clean liquids, gases, saturated steam, superheated steam, compressed air, natural gas, fuel gases, chemicals, and utility fluids.
The flow meter operates by creating a pressure differential across a precision-machined orifice plate installed within the pipeline. As the process fluid passes through the restricted opening of the orifice plate, its velocity increases and pressure decreases. The differential pressure generated is measured by a high-accuracy DP transmitter, which calculates the volumetric or mass flow rate using standardized flow equations.
The VSAN Orifice Flow Meter is available in Concentric, Eccentric, Segmental, Quadrant Edge, Restriction Orifice, and Conditioning Orifice Plate designs to suit different process requirements. It can be supplied with Flanged, Carrier Ring, Orifice Union, or Orifice Fitting assemblies, depending on pipeline size and application.
The intelligent transmitter provides a clear digital display of instantaneous flow rate, differential pressure, totalized flow, temperature (optional), pressure (optional), and diagnostic information. The system supports 4–20 mA Analog Output, HART Communication, RS485 Modbus RTU, Pulse Output, Profibus (Optional), and Foundation Fieldbus (Optional), allowing easy integration with PLC, DCS, SCADA, and industrial automation systems.
Manufactured using high-quality materials such as SS304, SS316, SS316L, Monel, Hastelloy, Duplex Stainless Steel, and other special alloys, the VSAN Orifice Flow Meter is designed to withstand high temperatures, high pressures, and demanding industrial environments while delivering long-term performance with minimal maintenance.
The VSAN Orifice Flow Meter is widely used in Oil & Gas, Petrochemical, Power Generation, Chemical Processing, Water Treatment, Food & Beverage, Pharmaceutical, Steel, Cement, Paper & Pulp, Fertilizer, and Utility Industries, where accurate and dependable flow measurement is essential.
The VSAN Orifice Flow Meter operates on the Differential Pressure (DP) Principle based on Bernoulli's Theorem.
A precision-machined orifice plate with a calibrated bore is installed inside the pipeline. As the process fluid flows through the restricted opening, its velocity increases while the static pressure decreases.
Pressure tapping points located upstream and downstream of the orifice plate measure the pressure difference created across the restriction. This differential pressure is directly related to the flow rate of the fluid.
The Differential Pressure Transmitter continuously measures the pressure difference and converts it into an electrical signal. Using the known pipe diameter, orifice bore size, fluid properties, and standardized flow equations, the transmitter accurately calculates the volumetric or mass flow rate.
For steam and gas applications, optional pressure and temperature compensation can be incorporated to provide highly accurate mass flow measurement. Since the orifice plate has no moving parts, the system offers excellent reliability, long service life, and stable performance in demanding industrial environments.
The VSAN Orifice Flow Meter is widely used for accurate flow measurement of liquids, gases, and steam across various industrial applications.
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