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  Valve Materials and Elastomers

  Posted in: Engineering guides

  Valve material selection should not be based only on nominal pressure or valve size. Operating pressure, temperature, fluid compatibility, corrosion risk, mechanical loads, connection type, design standards and installation requirements must be evaluated together. The following tables provide indicative material equivalents according to EN, DIN, WNr and ASTM designations, together with typical temperature limits. These limits do not replace pressure-temperature ratings from applicable...

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  Expansion of Pipes in Steam Systems

  Posted in: Engineering guides

  In steam and hot fluid systems, pipe length increases as temperature rises. Thermal expansion must be considered during system design in order to avoid high mechanical stresses, excessive loads on fixed points, pipe deformation and forces transmitted to valves, flanges, steam traps, heat exchangers and other equipment. Proper arrangement of pipe guides, supports, fixed points and expansion joints allows the pipework to move in a controlled manner and absorb the change in length caused by...

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  Calculating Flash Steam

  Posted in: Engineering guides

  Flash steam is generated when hot condensate at a higher pressure is released to a lower pressure. The pressure reduction lowers the saturation temperature, and part of the heat contained in the condensate is converted into steam. This phenomenon commonly occurs downstream of steam traps, pressure reducing points, condensate return lines and flash vessels. Correct estimation of flash steam quantity is important for sizing condensate lines, flash vessels, vents and energy recovery systems.

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  Content of Air in Steam Systems

  Posted in: Engineering guides

  The presence of air and other non-condensable gases in a steam system affects saturation temperature, heat transfer and equipment operation. Even a small percentage of air can cause a significant reduction in the actual steam temperature at the point of use. Correct air venting, removal of non-condensable gases and proper selection of steam traps and air vents are therefore important factors in the operation of industrial steam systems.

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  Pressure Drop in Steam Lines

  Posted in: Engineering guides

  Pressure drop in a steam distribution network directly affects the available pressure at the point of use, as well as the operation of control valves, pressure reducing valves, steam traps and heat exchangers. For preliminary technical checks, pressure drop may be estimated using the steam density, flow velocity and the total resistance coefficient of the pipework and installed components.

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  Recommended Flow Velocities for Steam, Water and Air Lines

  Posted in: Engineering guides

  The following values may be used as an indicative guide for preliminary checks of flow velocities in industrial steam, condensate, feedwater, cooling water and compressed air piping systems. Proper flow velocity selection affects pressure drop, noise, erosion, water hammer risk, condensate transport and the operation of valves, steam traps, pressure reducing valves and control equipment.

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  Saturated Steam Table

  Posted in: Engineering guides

  The following table presents basic thermodynamic properties of saturated steam as a function of absolute pressure. The data may be used as a technical reference for preliminary calculations and equipment selection in steam systems, including steam traps, control valves, pressure reducing valves, safety valves, condensate lines and heat exchange applications.

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  IEC 60534 Control Valve Standard

  Posted in: Technical Standards Library

  IEC 60534 is the primary international standard governing control valves, including sizing methods, flow coefficients, performance characteristics, noise prediction and control valve evaluation procedures.

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  ISO 5211 Valve and Actuator Mounting Interface Standard

  Posted in: Technical Standards Library

  ISO 5211 is the international standard defining mounting interfaces between quarter-turn industrial valves and actuators. The standard enables reliable installation of pneumatic, electric and hydraulic actuators on valves from different manufacturers without requiring custom adapters.

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  ISO 5208 Industrial Valve Pressure Testing and Leakage Rate Classification

  Posted in: Technical Standards Library

  ISO 5208 is the international standard defining pressure testing procedures, leakage rate classifications and acceptance criteria for industrial valves. The standard is widely used to verify pressure integrity and sealing performance before valves are placed into service.

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  API 598 Valve Inspection and Testing

  Posted in: Technical Standards Library

  API 598 is the primary American Petroleum Institute standard governing inspection, pressure testing and acceptance criteria for industrial valves. It is widely specified in oil and gas facilities, refineries, petrochemical plants, power generation systems and industrial process applications.

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  ASME B16.34 Valves Flanged, Threaded and Welding End

  Posted in: Technical Standards Library

  ASME B16.34 is the primary American standard governing the design, construction, pressure-temperature ratings, materials, wall thickness requirements and marking of industrial valves. It is widely specified for valves used in oil and gas facilities, petrochemical plants, power generation systems, process industries and industrial piping networks.

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  EN 12266 Pressure and Tightness Testing of Industrial Valves

  Posted in: Technical Standards Library

  EN 12266 is the primary European standard defining pressure testing, tightness testing and acceptance criteria for industrial valves. The standard establishes uniform testing procedures used by manufacturers, inspectors and end users to verify the mechanical strength and sealing performance of industrial valves before delivery and commissioning.

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  EN 1092-1 – PN Flanges for Industrial Valves and Piping

  Posted in: Technical Standards Library

  EN 1092-1 is a European standard for circular steel flanges used with pipes, valves, fittings and accessories in PN-designated piping systems. It specifies flange types, dimensions, sealing faces, tolerances, bolting, materials, marking and pressure/temperature ratings. For industrial valves, EN 1092-1 is essential for correct mechanical connection between the valve and the pipeline. Matching only DN or PN is not enough. Bolt hole pattern, sealing face, flange type and compatibility with the...

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  EN 558 – Face-to-Face and Centre-to-Face Dimensions of Industrial Valves

  Posted in: Technical Standards Library

  EN 558 specifies the face-to-face and centre-to-face dimensions of metallic industrial valves installed in flanged piping systems. It is an important standard for valve selection, replacement and installation because it helps confirm that the valve has the correct installation length. EN 558 is used for PN and Class designated valves and is especially useful when a valve must be replaced without modifying the existing pipework.

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  EN 10204 – Inspection Documents for Industrial Valves and Process Equipment

  Posted in: Technical Standards Library

  EN 10204 is the European standard that defines the different types of inspection documents supplied with metallic products, industrial valves, steam traps, piping components, pressure vessels and process equipment. The standard specifies how manufacturers document conformity with applicable material specifications, manufacturing standards and project requirements. EN 10204 does not define material properties. Instead, it defines how inspection and testing results are documented and...

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  Ball Float Steam Traps: Selection, Operation, and Industrial Applications

  Posted in: Articles

  Ball float steam traps are mechanical steam traps used where continuous condensate removal is required under variable load conditions. They are commonly specified for steam-heated heat exchangers, process coils, calorifiers, air heaters, and other equipment where condensate must be discharged as it forms without causing temperature instability or waterlogging. A typical ball float steam trap uses a buoyant spherical float connected to a valve mechanism. As condensate enters the trap body,...

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  How to Select the Right Steam Trap for Industrial Applications

  Posted in: Articles

  A steam trap is a self-acting valve used to discharge condensate, air, and non-condensable gases from a steam system while limiting live steam loss. Correct selection depends on the duty, not only the pipe size. A trap that works on a steam main drip leg may be unsuitable for a heat exchanger, tracing circuit, sterilizer, or pressure-reducing station. ISO classifies automatic steam traps into three main operating groups: mechanical, thermostatic, and thermodynamic. ISO/DIS 6704 is...

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  Industrial Globe Valves for Steam, Thermal Fluids, Process Utilities and High-Pressure Service

  Posted in: Articles

  Globe valves are selected when a piping system needs positive isolation with a more controllable closing characteristic than many quarter-turn or gate-type isolation valves. In steam, condensate, hot-water, thermal-oil and process-utility systems, the seat-and-disc geometry allows progressive restriction of the flow path, so the valve can be used for isolation and, with the correct plug/disc design, limited throttling duty. The category includes bellows-sealed and packed-gland globe valves,...

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  What is Superheated Water and Where is it Used?

  Posted in: Articles

  Superheated water is an ideal solution for high-efficiency industrial heating, operating at temperatures up to 200°C with minimal energy loss. It runs in closed pressurized circuits, offering enhanced safety, energy savings, and high thermal stability in demanding applications.

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