Flanged valve types

Flanged Globe Valve – Key Advantages Here are a few pros related to flanged globe valve: Installation Convenience One major advantage is the ease of installation and maintenance that flanged bodies provide. The valve simply bolts between two mating flanges, eliminating the need for threading or welding into the pipeline. This makes it simple to add globe valves wherever flow control is needed. Flanged faces can also be re-machined if surfaces become damaged, extending the valve’s service life. And accessing internal components is straightforward when repairs are required. Low Turbulence Flow Path Another key benefit is the valve’s straight-through flow path when open. The disk or plug rises straight up, leaving a cylindrical opening for media flow. This helps minimize flow turbulence and pressure drop compared to globe valves with a constricted seat area. The straight-through design also helps prevent fouling or clogging since there are no pockets or areas for material buildup. This is an advantage in services with dirty or viscous media. Precise Throttling Control Of course, globe valves excel at throttling and regulating flow. The linear stroke of the plug against the seat enables extremely precise control, from fully open to fully closed. Their inherently quick operating stroke also provides good rangeability from maximum to minimum flow. Flange Globe Valve – Key Disadvantages Here are a few limitations when it comes to flange globe valve: Bulky Design One potential downside is that globe valves in general have a bulky, heavy design – especially in larger line sizes. The robust globe bodies and thick flanges require more material and occupy more space compared to other valve styles. This can make globe valves impractical for installations where low weight or compact size are priorities. Routing pipes around their larger footprint may also be challenging in cramped areas. High Operating Forces Another drawback relates to the operating torque required to open and close flanged globe valves. The linear stroke and heavy-duty plug disk create higher operating forces that actuators or manual operators must overcome. While this solid construction enables great torque seating for tight shutoff, it also makes globe valves less suitable for frequent operation. Other valve types like ball valves require less torque and are better for applications with a high cycling frequency. Conclusion Whenever excellent throttling control and robust performance are needed, the advantages of flanged globe valves outweigh the disadvantages for most applications. Just be sure to size actuators properly and account for space requirements.