Industrial valves · Клапан обратный Forbes Marshall (Check Valve)

Engineering Overview of Forbes Marshall Check Valves: Types, Characteristics, Materials

Forbes Marshall check valves are engineered components designed for absolute prevention of reverse flow of working media in process pipelines. Their design ensures system integrity and safety during operation under peak loads and sharp pressure fluctuations, which is critical for protecting pumping equipment and compressors.

Key design and operational parameters of Forbes Marshall valves:

• Guaranteed Class "A" tightness: The design fully complies with the requirements of industrial standards API, ANSI, and ISO. The shut-off element is designed to operate with pressures up to class #2500, which eliminates any leaks, including volatile and hazardous emissions.
• Optimized hydrodynamics: The internal geometry of the flow channel is designed using CFD modeling to minimize hydraulic resistance and pressure losses (ΔP) at full opening.
• Resistance to extreme conditions: The materials and alloys used are certified for stable operation in a temperature range up to 300°C and in contact with chemically aggressive media.
• High actuation speed: Models with a quick-closing function instantly react to flow reversal, effectively dampening water hammer and protecting expensive equipment from damage.

Types of designs and technical specifications

Lift Check Valve

This configuration is used to protect against backflow in systems with pumps, compressors, and heat exchange equipment. The shut-off element (disc) moves strictly along a vertical axis under the action of the flow, and when the flow stops or reverses, it automatically seats under its own weight, sealing the channel.

Quick Closing Non Return Valve

Designed for systems where closing speed is a critical factor, for example, on turbine steam extraction lines or in boiler feedwater systems. Provides virtually instantaneous isolation of the section, preventing the development of cascading accidents in case of a sharp pressure drop.

Stop and Check Valve

An integrated device combining the functionality of a check valve (automatic backflow prevention) and a stop valve (forced manual or automated shut-off). Ideal for sections requiring both backflow protection and the ability for complete isolation for routine maintenance without draining the entire system.

Material execution and limiting operating parameters

EV Group China supplies valves made from certified carbon, alloy, and stainless steels, as well as special alloys with high corrosion resistance and resistance to erosive wear. Standard operating temperature range: from -20°C to +300°C. For operation in cryogenic conditions (below -20°C) or in contact with highly concentrated acids and other aggressive media, special material execution must be requested, which is selected by EV Group China engineers based on an analysis of the design documentation.

Engineering and Supplies from EV Group China

EV Group China provides comprehensive supplies of Forbes Marshall pipeline fittings for projects in the energy, oil and gas, chemical, and metallurgical industries worldwide. Our process engineers perform qualified equipment selection in exact accordance with the parameters of your technological process (pressure, temperature, media composition) and organize logistics to any point on the map, including the EAEU region.