OS&Y Swivel Disc Cast Steel Pressure Seal High Temperature High Pressure Steam Globe Valve with Pneumatic Actuator

Product Description

Pound class globe valve is a type of valve used to regulate flow in a pipeline. It consists of a movable disk or plug that moves perpendicular to the flow direction to control the flow rate. The "pound class" refers to the pressure rating of the valve, indicating the maximum pressure it can withstand. These valves are commonly used in applications where precise flow control is required, such as in industrial processes, power plants, and water treatment facilities. They are named "globe" valves due to the shape of their body, which resembles a globe.


One advantage of pound class globe valves is their excellent throttling capability, which allows for precise control of flow rate. Additionally, pound class globe valves offer good sealing properties, ensuring minimal leakage when closed, even under high-pressure conditions. Their sturdy construction and robust design make them suitable for handling a wide range of pressures and temperatures, making them versatile for various industrial applications. Furthermore, pound class globe valves typically have a longer service life and require less maintenance compared to other types of valves, contributing to cost-effectiveness and reliability in operations.

Good shutoff capability.
Moderate to good valve throttling capability.
Shorter stroke (compared to a gate valve).
Easy to machine or resurface the seats.
Can be used as a stop-check valve.
Can only be used for one-way fluid flow.
Good sealing performance,small friction between sealing face and life long.



To understand the working of a globe valve, one should understand how the disc and seat of the valve are positioned. The disc inside the valve is movable whereas the seat is stationary and is in a spherical body. The seat is parallel to the pipe and perpendicular to the disc.

The disc of the valve will move up and down according to the actuation of the wheel on the top of the valve. The wheel can be moved either manually or through an actuator - when it is moved, the disc rises and falls as it is attached to the valve stem. To stop the flow completely, the disc is fully seated on the seat ring. To resume flow, the disc is lifted up.

Throttling and controlling of flow can be done by adjusting the position of the disc as per need.

If the case is so that the globe valve is operated in low-temperature situations, then the valve is installed in such a way that the pressure falls under the disc. For high-temperature situations, like boilers that work in steam, the valves are positioned to handle pressure above the disc.





Pound class globe valves find application in various industries where precise flow control and reliable sealing are crucial. Some common applications include:

Oil and Gas Industry: Pound class globe valves are used in oil refineries, petrochemical plants, and natural gas processing facilities for regulating flow in pipelines, controlling the flow of crude oil, refined products, and gases.
Power Generation: These valves are employed in power plants for controlling the flow of steam, cooling water, and other fluids in boilers, turbines, and condensers, ensuring efficient operation and safety.
Chemical Processing: Pound class globe valves are utilized in chemical plants for regulating the flow of corrosive chemicals, acids, and solvents, where precise control and leak-tight sealing are essential to prevent environmental contamination and ensure worker safety.
Water Treatment: They are used in water treatment facilities for controlling the flow of water, chemicals, and other fluids in filtration, purification, and distribution processes, ensuring optimal treatment efficiency and water quality.
HVAC Systems: Pound class globe valves are integrated into heating, ventilation, and air conditioning (HVAC) systems for regulating the flow of hot water, chilled water, and steam, maintaining desired temperature levels and energy efficiency in buildings.
Marine and Shipbuilding: These valves are utilized in marine applications for controlling the flow of seawater, fuel, and other fluids aboard ships, ensuring safe and efficient operation of propulsion systems, cooling systems, and onboard machinery.

Overall, pound class globe valves are versatile components widely used in industries where precise flow control, reliable sealing, and durability are paramount.



No matter what type of globe valve you have, there are several key parts that all globe valves contain: body, seat ring, cage, bonnet, stem, plug (disk), yoke, yoke nut, back seat, packing, and valve Actuator.
 

Body

The body is the main structure of the valve that keeps everything together. This part contains all internal parts of the globe valve to allow the control of the substance that needs regulation. The opening of the body contains ports (usually two or three ports) to enable the movement of the fluid to the inside or outside of the globe valve.

Seat Ring

The seat is among other globe valve parts that seal the space between the disk/stem and bonnet. The seat ring can be screwed into the valve or torqued. The seat is also known as a seat ring and provides a shutoff surface that's stable and also replaceable. Seat rings can hold the cage firmly to the body of the valve.

Bonnet

The bonnet is one of the outer globe valve parts that's connected to the body to provide a leak-proof closure. There are different bonnet types such as bolted, screw-in, or union bonnet that are used in different globe valves. Each of these bonnet types has its own advantages. For example, the union bonnet not only adds strength to the body but is also great for applications that need regular cleaning or inspection. The screw-in bonnet with its simple design offers a pressure-tight seal. And the last bonnet type, the bolted bonnets that are attached with bolts are great for higher pressures.

Stem

The stem is part of the globe valve that connects the disk to the handwheel or the valve actuator to transmit the actuation force. Since it connects the actuator to the parts inside of the globe valve, it is considered as one of the critical globe valve parts. If the valves are controlled by actuators, the stem is smooth but for the manual valves, they are threaded.

The ends of smooth steam are threaded allowing the connection to the actuator and the plug. A wearable packing surrounds the smooth stem to prevent leaking material from the valve. So, the packing should be replaced regularly in the maintenance period. The stem can withstand a large amount of compression force in the closure state. And when the valve is opening, it has high tensile strength.

Plug (Disk)

The plug or the disk is among the essential globe valve parts. It moves perpendicular to the seat and its movement can block or free the flow since it works as a moveable physical barrier. When the valve is closed, the plug sits against the seat to block the flow and when it sits above the seats. it enables the flow of the material.

Different disk arrangements have been designed for globe valves such as composite type, ball type, and needle type. The composite disk can provide a better shut-off, while the ball type is used for low-temperature and low-pressure systems. The needle disk has the advantage of providing a better throttling compared to the other two.

 

 

 

DN mm	Flange drilling	L mm	H mm	H3 mm	F mm	F1 mm	F2 mm
40	PN10/16	240	200	263	14	16	30
50	PN10/16	250	209	292	14	16	30
65	PN10/16	270	243	336	17	20	34
80	PN10/16	280	282	382	17	20	34
100	PN10/16	300	319	429	19	22	34
125	PN10/16	325	346	471	19	22	34
150	PN10/16	350	403	493	19	22	34
200	PN10/16	400	490	660	24	28	34
250	PN10/16	450	664	864	27	31	47
300	PN10/16	500	740	968	27	31	47
350	PN10/16	550	947	1207	32	37	55
400	PN10/16	600	959	1249	32	37	55
450	PN10/16	650	958	1278	32	37	55
500	PN10/16	700	958	1316	32	37	55