Manually operated globe valves

What is a manually operated globe valve?

Manually operated globe valves are durable shut-off valves. Their sealing element consists of a wedge-shaped disc that seals tightly against the seat. Globe valves cause a slight pressure drop in the pipeline, which is important to consider when selecting a valve. Globe valves open slowly, preventing pressure surges. Globe valves are categorized into packing-sealed and jacket-sealed valves.

The jacket seal is a kind of double safety measure in addition to the packing seal, preventing stem leakages and fugitive emissions. This is an excellent feature when considering valve maintenance requirements and the valve’s suitability for hazardous fluids such as hot oil, chlorine, or hydrofluoric acid. The jacket prevents process fluid from reaching the packing, making the valve more environmentally friendly and safer. The pull nut in the bonnet allows for the vertical movement of the stem (the stem does not rotate as in packing-sealed valves), so that the valve threads are protected from external contamination and corrosion.

Watch our webinar on globe valves.

Selection of the Manually Operated Globe Valve

When sizing a globe valve, it is important to know the process fluid, temperature, pressure, and the pressure differential across the valve.

Various material options are available, ranging from cast iron to acid-resistant steel and nickel alloys. Our product portfolio covers EN and ANSI valves for both low-pressure and high-pressure systems.

For Process Fluids

Our product range includes ARI-Armaturen’s globe valves available in welded versions with both EN and ASME flanged options. OMB specializes in small, compact shut-off valves, and our selection also includes special materials. For challenging fluids, we offer Descote globe valves in our portfolio.

When dealing with toxic or otherwise environmentally harmful fluids, it is important to pay attention to the fugitive emission level of the stem seal. A low-emission valve is both user and environmentally friendly. In addition, leakage emissions through the stem seal represent a loss of process fluid. Besides low-emission models with containment seals (ISO 15848, API 622, API 624), our range also includes jacket-sealed models for process conditions where it is crucial to ensure that process fluid does not escape into the environment through the containment seal.

For Steam and Condensate

The same general principles apply to globe valves suitable for steam and condensate as described above for process fluids. The brochures include, among others,

• ARI FABA®-Plus jacket-sealed globe valves
• ARI STOBU® packing-sealed globe valves
• ARI FABA® -Supra I and C jacket-sealed globe valves
• ARI STOBU® 3-way globe valves, changeover valves
• ARI-FABA® -Plus / -Supra ANSI jacket-sealed ASME valves
• OMB ECO I jacket-sealed ASME globe valves

For Gases and Fuels

The offering is largely the same as for other process fluids.

For hydrocarbon applications, packing-sealed valves with low-emission packing are available. The stem seal is type-tested, for example, according to ISO 15848-1 or TA-Luft. In a jacket-sealed valve, the stem is additionally sealed with a welded metal jacket, which makes the packing pressure-free and the valve itself more responsive. No fugitive emissions occur through the stem seal of the jacket-sealed valve.

For Cryogenic Fluids

For cryogenic applications, the globe valve is made of materials that are resistant to cold, such as stainless steel. The cryo valve has an extended stem to ensure that the stem seal remains intact. The cryo valve must be clean and dry, as freezing water, for example, can damage the valve.

Globe valves are ideally suited for shut-off and control applications with cryogenic fluids. Due to their design, globe valves always incur a certain amount of flow resistance. The valve does not have an intermediate chamber where process fluid could become trapped.

Our product portfolio includes a wide range of shut-off, quick shut-off, and control globe valves for cryogenic applications from HEROSE and KÜHMEL.