The Swanson Flo Blog: July 2020

There are important factors to consider when defining a thermal mass flowmeter to ensure precision and performance in a gas flow application.

A thermal mass flowmeter has numerous advantages over other technologies for measuring the mass flow rate and consumption of gases. Featuring wide rangeability, pressure independence, extreme low-end sensitivity and ease of installation, they have become widely popular for countless commercial, industrial and environmental applications. Furthermore, by offering a variety of configurations and outputs, TMFMs provide the flexibility and economy to accommodate mostly any type of gas flow application.

To use a TMFM to its fullest potential, give thoughtful consideration to the installation location, the meter’s flow body and which features are best for the application.

The topics it covers are:

What is mass flow?
Why is mass flow important?
9 benefits of thermal mass flowmeters
Importance of proper installation
Selecting the proper meter and specifications
Wiring considerations
Applications to avoid

For more information about Sage Metering products, contact Swanson Flo. Call them at 800-288-7926 or visit their website at https://swansonflo.com.

The Jordan Valve Sliding Gate Seat is a true value-added alternative to conventional trim designs. Here's why:

Easy Maintenance

Sliding Gate Seats only have one moving component. The seats are not pressed or screwed, making removal simple. Cv values are interchangeable. Valve action is easily changed.

Seat Materials

Jorcote is tougher than stainless steel, offering excellent wear, corrosion, and galling resistance. It has lower friction coefficient than Teflon, providing higher pressure drop capability and less offset. Jorcote seats handle temperatures from sub-zero to 550 ° F (288 ° C). Seats were tested to 1,000,000 full stroke cycles in 70 psi steam, maintaining ANSI Class IV leakage while exhibiting negligible wear.

Constant Seat Contact

Disc and plate are in constant contact. Therefore, there is no 'chatter' inside the valve, less mechanical wear and greater stability at the stroke's low end. Constant touch results in self-lapping and self-cleaning.

Straight Thru Flow

The control element is perpendicular to flow, resulting in lower turbulence and greater trim life.

Short Stroke

In regulators, this results in faster response to input signals, less droop (greater accuracy), and longer diaphragm life. In control valves, the gate seat's short stroke results in less packing wear. Smaller actuators may also be used, resulting in lighter weight, smaller envelope dimensions and less air consumption.

Multiple Orifice Layout

The sliding gate seat's multiple orifice dissipates wear from downstream flow, resulting in longer trim life and quiet activity.

Disc plate overlap

Disc and plate overlap 1/32 "(0,8 mm) around each tube. This creates an area of closure, not line of closure, resulting in better shutoff for a longer period of time, reducing waste and lowering costs.

For more information on Jordan Regulators and Control Valves, contact Swanson Flo. Call them at 800-288-7926 or visit their website at https://swansonflo.com.

Excellent Article: Specifying a Thermal Gas Flowmeter for Gases