Purge Rotameter

Purge Rotameter is built to measure and control extremely low flows of fluids and gases and provides visual display.

It is equipped with a low flow rotameter along with needle valve assembly which can be used to adjust process flows precisely.

Purge rotameter along with differential pressure regulator is used to compensate for varying pressure in the pipe line and keeps flow rate constant.

This compact purge meter can be used for sampling flow measurement as well as process analyzer applications.

• Extremely low flow measurement.
• Lightweight and compact design.
• Superior functionality with excellent performance.
• Easy to mount with negligible maintenance.
• Instant flow rate indication using a calibrated scale.
• Economical solution for low-flow applications.
• Good measurement accuracy.
• Suitable for panel and side mounting.

• Fluid: Liquids & Gases
• Specific Gravity: Up to 1.85
• Viscosity: Up to 220 cP
• Design Temperature: Up to 100°C
• Design Pressure: Up to 7 Kg/cm²
• Measuring Range: 0.6 to 160 LPH (Liquids), 10 to 5000 NLPH (Gases)

Low Flow Fluid Entry

The Purge Rotameter gets the process fluid from the inlet port. The instrument is made to accurately measure the smallest flow rate of the fluid which may either be liquid or gaseous. It is an effective low flow rotameter complete with a needle valve assembly.

Flow Regulation

In the instrument, there is provision for regulating flow through the needle valve, depending on process needs. The flow regulation can be employed in sample monitoring and analyzer applications.

Movement of Float and Measurement

The regulated flow moves up inside a conical tube to move the float. When the flow of the liquid creates the same amount of upward force as the gravitational pull, the float stabilizes at the point representing the actual flow rate.

Pressure Difference

If provided with a purge rotameter with DP regulator, the regulator ensures a constant differential pressure across the needle valve.

Material Options

• Available Body Materials: SS 304, SS 304L, SS 316, SS 316L

End Connections

• Standard Fitting Typologies: Flanged to AS, BS, DIN, Triclover, Screw to BSP, NPT (M/F)

Performance & Design Specs

• Measurement Accuracy: ±2% of FSD
• Mounting Adaptations: Panel / Side Mounting options

Mechanical & Assembly Variations

• Flanged Configuration: System option featuring a flanged connection provided with or without an isolation valve assembly.
• Vertical Screwed Configuration: In-line integration style layout featuring a vertical screwed connection provided with or without an isolation valve module.
• Rear Connection Layout: Process layout design providing a rear connection with or without an isolation valve.
• Vertical Tri-Clover Option: Sanitary line fitting variant establishing a vertical tri clover connection provided with or without an isolation valve setup.
• Alarm Switch Integration: Electrical system variant supplying one flow alarm switch adjustable throughout the operating flow range.
• Regulator Integration Module: Specialized assembly featuring a purge rotameter with dp regulator and an isolation valve.

Keep Flow Rate Constant with Changes in Pressure: By using a DP regulator with our purge rotameter, one will be able to keep a steady flow rate due to the changes in pressure that may occur either upstream or downstream.

Continuous Monitoring of Sample Flow Rate: This purge rotameter is made for analyzers; therefore, it monitors sample flow continuously for constant process operations.

Control of Small Flow Rates: By using a low flow rotameter with a needle valve assembly, it becomes possible to adjust flow rate precisely.

Compact Installation of Rotameter: This is possible by using a purge rotameter with a rear connection.