How Does Cage guided valve Work?

Globe style or cage-guided globe valves are used across industries to improve stability and flow control in demanding and high-pressure applications. Jordan Valve’s cage-guided globe valves ensure consistent operation, even under high-pressure and temperature conditions. Our cage-guided globe valves feature a robust design and are engineered for durability. They are offered in various configurations to meet industrial requirements. These valves provide exceptional control, tight shutoff, and minimal maintenance, making them the ideal solution for critical fluid and gas flow regulation. Request a quote today!

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Types of Globe Style/Cage-Guided Control Valves We Offer

Jordan Valve offers a comprehensive range of globe-style and cage-guided pressure and back-pressure regulating valves designed for precise control in industrial applications. This series includes various configurations to meet diverse process needs, including:

• Globe Pressure Regulating Valves – Featuring a straightforward yet effective design, these valves regulate downstream pressure with high accuracy, making them ideal for steam, gas, and liquid applications.
• Air-Loaded Globe Valves – These pressure regulators utilize an external air source for finer control over setpoints, providing enhanced responsiveness and adaptability in automated systems.
• Cage-Trim Pressure Regulators – Engineered for durability and precision, the valves use a cage-guided design to ensure stability and minimize wear, even in demanding conditions with fluctuating pressures.
• Piloted Back-Pressure Regulators – Designed to maintain a controlled upstream pressure, these valves use a pilot system for more accurate and consistent performance, making them suitable for applications requiring precise back-pressure control.

Jordan Valve’s Teflon and metal diaphragm options, quick-change seat rings, and unique sliding gate technology (available on select models) enhance performance, extend valve life, and reduce maintenance costs. These valves are commonly used in industries such as oil and gas, chemical processing, power generation and food and beverage.

How Does a Cage-Guided Globe Control Valve Work?

A cage-guided globe control valve features an internal movable plug or disc, which is attached to the valve stem and is guided by a surrounding cage structure. The cage is a fixed component that features precisely machined ports that guide the movement of the plug, ensuring its smooth and accurate movement in the valve body. It also controls the fluid flow by uncovering or covering the port areas in the cage when the plug is lifted or lowered. The guiding function of the cage enables this valve to act as a precise flow regulator, minimizing lateral forces on the stem. This valve design ensures superior stability and performance in many high-pressure drop applications.

Benefits of Using Globe Control Valves

Our globe control valves are designed for excellent pressure and fluid flow control across process industries. These valves are often chosen over competitor products due to the following reasons:

• The cage design of these valves helps center the valve plug, assuring better shut-off capabilities and minimizing the risk of potential leaks. These factors contribute to accurate flow control.
• The cage guides the plug, reducing wear and tear on the sealing surfaces and thereby extending the lifespan of the valve.
• The cage design of these valves helps mitigate cavitation by preventing the vapor bubble collapse and ensures quieter operation.
• These valves enhance operational efficiency as they are less prone to vibrations due to the stable guiding mechanism.
• They can be used for various applications involving corrosive or viscous liquids, process gases, or utility steam.

Applications of Globe Control Valves

We provide globe control valves for steam, liquid, and gas media applications that require flow regulation, tight shutoff and throttling capabilities. They are used to:

• Regulate the flow of water into the boilers
• Control the flow of chemicals and other substances during production
• Control the water flow through pumps, filter, and other equipment
• Regulate the flow of hot geothermal brine between heat exchangers, wells and reinjection lines
• Isolate and regulate the flow of carbon dioxide captured within carbon capture and storage (CCS) systems

We can customize the cage-guided control valves for use across:

• Boiler vents and drains
• Cooling water systems
• Fuel oil systems
• Feedwater and chemical feed systems
• Turbine seals and drains
• Turbine lube oil system

Frequently Asked Questions

• Can I use cage-controlled globe valves in varying flow control applications?
  Yes, cage-controlled globe valves ensure stable control in fluctuating flow conditions. Their cage design helps to maintain consistnt flow and pressure regulation, ensuring reliable performance even in challenging conditions.

• Do you offer customized cage-controlled globe valves customizable?
  Yes, we provide customization options for all our cage-controlled globe valves, including different materials, sizes, and end connections. This allows you to tailor the valve to meet the specific requirements of your application.
• How do I size the right cage-controlled globe valve for my application?
  To ensure proper valve selection, use our Jordan Valve’s sizing software or consult a local representative. The software will help you size the valve based on flow rates, pressures, temperatures, and other system conditions.

A more modern version of the globe valve design uses a piston-shaped plug inside a surrounding cage with ports cast or machined into it.

These cage-guided globe valves throttle flow by uncovering more or less of the port area in the surrounding cage as the plug moves up and down. The cage also serves to guide the plug so the stem need not be subjected to lateral forces as in a stem-guided valve design.

Cage-guided Globe Valve

A photograph of a cut-away control valve shows the appearance of the cage (in this case, with the plug in the fully closed position). Note the “T”-shaped ports in the cage, through which fluid flows as the plug moves up and out of the way:

An advantage of the cage-guided design is that the valve’s flowing characteristics may be easily altered just by replacing the cage with another having different size or shape of holes.

Contact us to discuss your requirements of Cage guided valve. Our experienced sales team can help you identify the options that best suit your needs.

By contrast, stem-guided and port-guided globe valves are characterized by the shape of the plug, which requires further disassembly to replace than the cage in a cage-guided globe valve.

With most cage-guided valves all that is needed to replace the cage is to separate the bonnet from the rest of the valve body, at which point the cage may be lifted out of the body and swapped with another cage.

In order to change a globe valve’s plug, you must first separate the bonnet from the rest of the body and then de-couple the plug and plug stem from the actuator stem, being careful not to disturb the packing inside of the bonnet as you do so.

After replacing a plug, the “bench-set” of the valve must be re-adjusted to ensure proper seating pressure and stroke calibration.

Cage-guided globe valves are available with both balanced and unbalanced plugs. A balanced plug has one or more ports drilled from top to bottom, allowing fluid pressure to equalize on both sides of the plug. This helps minimize the forces acting on the plug which must be overcome by the actuator:

Unbalanced plugs generate a force equal to the product of the differential pressure across the plug and the plug’s area (F = PA), which may be quite substantial in some applications.

Balanced plugs do not generate this same force because they equalize the pressure on both sides of the plug, however, they exhibit the disadvantage of one more leak path when the valve is in the fully closed position (through the balancing ports, past the piston ring, and out the cage ports):

Thus, balanced and unbalanced cage-guided globe valves exhibit similar characteristics to double ported and single-ported stem- or port-guided globe valves, and for similar reasons.

Balanced cage guided valves are easy to position, just like double-ported stem-guided and port-guided globe valves.

However, balanced cage-guided valves tend to leak more when in the shut position due to a greater number of leak paths, much the same as with double-ported stem-guided and port-guided globe valves.

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