Even though Cast Steel Globe Valves are useful and affordable, they have some downsides:
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Note: Knowing these issues helps you decide if these valves suit your system.
Cast Steel Globe Valves are popular in many industries because they control flow well. Here are some common uses:
Industry Application Description Food and Beverage Used to handle clean fluids in factories and packaging plants. Pulp and Paper Controls flow of chemicals, steam, and pulp during production. HVAC Systems Manages flow of hot water, cold water, and refrigerants in buildings. Pharmaceutical and Biotechnology Regulates flow of clean water and sterile liquids in production. Oil and Gas Controls flow of oil, gas, and refined products in operations. Power Plants Manages flow of steam and water in boilers and cooling systems. Chemical Processing Handles harmful or corrosive liquids in tanks and reactors. Water Treatment Controls flow of water and chemicals in treatment plants.These examples show how flexible Cast Steel Globe Valves are. Whether in energy, factories, or water systems, these valves work well for flow control.
Forged steel globe valves are made by pressing solid steel under high pressure. This process makes the steel very strong and long-lasting. These valves work best in systems with high pressure and heat where safety is important.
The materials used in forged steel globe valves help them perform well in tough conditions. Here’s a simple breakdown of their parts and materials:
Part Material Used Body and Bonnet A 105 / A 182 F 304/316 / A 182 F 304L / L / A 182 F 11/22 Trims CS + Cr 13% [SS 410]/ A 105 / A 182 F 304/316 / A 182 F 304L/L / A 182 F 11/22 Gasket P.T.F.E. / Graphite Asbestos / SPW SS With Graphite Filled Gland Packing Grafoil / braided Asbestos / P.T.F.E. Hand Wheel S.G. Iron / Ductile Iron Fasteners CS / B7 / 2H / SS 304 / SS 316 Valve Design BS Pressure Testing API 598 / BS Part I Face to Face ANSI B 16.10 Butt Weld End ANSI B 16.25 Socket Weld End ANSI B 16.11 Screwed End ANSI B 1.20.1 (BSP / NPT) Inspection 3rd Party / Client / ManufacturerThese valves are smaller and lighter than cast steel ones. This makes them easier to fit in tight spaces.
Forged steel globe valves are made by heating steel until it’s very hot. Then, the steel is pressed into shape using strong force. This process removes any weak spots inside the steel, making it stronger. After shaping, the parts are carefully measured and cut to the right size. The finished valves are tested to meet rules like API 598 and BS .
This way of making valves ensures they can handle tough conditions without breaking. Their strong build makes them perfect for important jobs in industries like oil, power, and chemicals.
Forged steel globe valves are stronger and last longer than cast steel ones. Forging squeezes the steel tightly, removing weak spots inside. This makes the steel tougher and more solid. For instance, F92 Class forged valves can handle 223.4 bar at °F (600°C). In the same conditions, F91 cast valves manage only 203.1 bar. At higher temperatures, the gap grows bigger. F92 valves handle 190.6 bar at °F (625°C), while F91 valves handle just 152.1 bar. This makes forged steel valves better for tough jobs where strength matters most.
Cast Steel Globe Valves are strong but not as tough in extreme conditions. Their making process can leave tiny flaws that weaken them over time. These flaws make them less able to handle high pressure and heat. Still, they work well in medium-pressure systems and for larger valve sizes.
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Both valve types keep systems safe, but forged steel valves handle pressure better. Their tight and compact design makes them great for high-pressure systems. Cast steel valves work fine but handle less pressure overall.
Valve Type Pressure Handling Capability Forged Steel Excellent Cast Steel GoodForged steel valves also stop leaks better because of their precise design. They are very reliable, even in tough conditions. Cast steel valves can stop leaks too but may need more upkeep to stay sealed.
Tip: Use forged steel valves for systems where leaks must not happen.
Cost is important when picking between these valves. Forged steel globe valves cost more because they are harder to make and use stronger materials. Their higher price is worth it for systems needing top strength and performance.
Cast Steel Globe Valves are cheaper, especially for bigger sizes. Casting costs less, making these valves a good choice for less demanding jobs. If you need to save money but still want good performance, cast steel valves are a smart option.
When picking a valve, think about how often it needs fixing and how reliable it is. These things affect how well your system works and how much it costs over time. Cast steel and forged steel globe valves are different in these areas.
Forged steel globe valves are very reliable. The way they are made removes weak spots, so they are less likely to break. This makes them great for systems that can’t afford to stop working. They last longer and need fewer fixes. Their small size also makes repairs easier and faster. Even though they cost more at first, their strength saves money later by needing fewer repairs or replacements.
Cast steel globe valves are flexible but might need more upkeep. The casting process can leave tiny flaws, which can wear out faster in tough conditions. These valves work best in medium-pressure systems where fixing them often isn’t a big deal. They cost less upfront, but you might spend more later on repairs.
Studies show that 70% of a valve’s costs happen after it’s installed, mostly during big repairs. Companies now wait longer, like 5 to 8 years, between fixes. This can lead to surprise problems. Surprisingly, only about half of the valves scheduled for fixing actually need it. Picking a reliable valve can help avoid wasting money on unnecessary repairs.
Maintenance Factor Cast Steel Globe Valves Forged Steel Globe Valves Maintenance Frequency More often Less often Long-Term Reliability Okay Very good Life Cycle Cost Impact Higher because of more repairs Lower because they last longerTip: If your system needs long gaps between fixes, forged steel globe valves are a better choice. Cast steel valves are still good for easier jobs.
Picking between cast steel and forged steel globe valves depends on what your system needs. Cast steel valves are good for medium pressure and come in many sizes and shapes. Forged steel valves are stronger and last longer, working best in high pressure and heat.