Selecting the right pressure relief valve can make the difference between smooth operations and costly downtime in industrial facilities. Anderson Greenwood valves have earned their reputation as industry leaders through decades of proven performance in demanding applications across oil and gas, chemical processing, and power generation sectors.
With a legacy spanning over 50 years, Anderson Greenwood pressure management solutions deliver the reliability and precision that critical operations demand. Understanding the range of valve types, specifications, and applications helps engineers and facility managers make informed decisions that protect equipment and personnel whilst maintaining operational efficiency. Industrial specialists like those at Natradesource provide comprehensive access to these premium valve solutions, supporting diverse industrial requirements with expert guidance.
Anderson Greenwood represents a comprehensive portfolio of pressure management solutions that define industry standards for repeatable, bubble-tight shutoff and extended service life. The product line encompasses pressure relief valves, tank protection systems, primary isolation valves, and instrumentation designed specifically for both standard and specialised installations. These valves maintain tight shutoff to at least 95% of set pressure, enabling increased system output whilst eliminating costly leakage.
The advanced engineering behind these valves incorporates balanced design principles that ensure proper operation regardless of back pressure variations. This eliminates the need for fragile metal bellows components whilst maintaining precise pressure control. The technology supports set pressures ranging from 15 to over 6,170 psig and temperature ranges from cryogenic conditions at negative 423°F up to 600°F, accommodating virtually any industrial application.
The Series 60 and 80 direct spring operated valves feature soft seats that deliver leak-tight performance for gas, vapour, liquid, and cryogenic applications. These compact units handle orifice areas from 0.049 to 1.287 square inches with connections available in NPT threaded or flanged configurations. The Type 84 innovative design specifically addresses high-pressure gas applications, including hydrogen storage, transportation, and refuelling stations where reliability is paramount.
Set pressures for these direct spring models range from 20 to 10,000 psig, with ASME Section VIII code certification ensuring compliance with international safety standards. The replaceable seals and adjustable blowdown features allow for customisation to specific process requirements. For facilities requiring robust control systems, exploring options from manufacturers like Fisher alongside Anderson Greenwood products provides comprehensive valve solutions.
Anderson Greenwood pilot operated valves deliver advanced overpressure protection through sophisticated two-stage design that separates sensing and relieving functions. The Series 200, 400, 500, 700, and 800 models accommodate orifices from 0.110 to 63.5 square inches, handling inlet ratings from ANSI Class 150 to 2500. These valves maintain main valve seat tightness to 98% of set pressure without leakage, maximising system efficiency and reducing product loss.
The pilot mechanism enables single set pressure adjustment that remains accurate and dependable throughout the valve’s service life. Minimal blowdown characteristics allow the valve to reseat slightly below set pressure, preventing chatter and excessive cycling that can damage valve components. DOT and CSA compliance certifications make these units suitable for pipeline and storage applications where regulatory requirements are stringent.
Anderson Greenwood valves serve critical functions across multiple industrial sectors where pressure management directly impacts safety and operational continuity. Oil and gas production facilities rely on these valves for wellhead protection, separation equipment, and downstream processing units. Refineries implement them throughout distillation columns, heat exchangers, and product storage systems where temperature and pressure variations demand responsive, reliable relief.
Chemical processing plants face particularly challenging service conditions with corrosive media, extreme temperatures, and toxic substances. The availability of exotic materials and specialised seat designs allows these valves to handle demanding applications. Power generation facilities utilise them in boiler feed systems, steam lines, and auxiliary equipment where operational reliability is essential.
Anderson Greenwood hand valves provide repeatable bubble-tight shutoff for instrument isolation duties across all pressure measurement and flow applications. Available with metal or soft seats, these valves handle gas, vapour, or liquid service with pressure ratings up to 10,000 psig. The extensive range of standard and exotic materials ensures compatibility with virtually any process fluid, including corrosive and high-temperature media.
The differential pressure manifold line represents the most innovative and comprehensive range available, featuring models for virtually every type of differential pressure instrument. Conventional three and five valve manifolds serve standard applications, whilst purpose-designed models address special requirements in flow and level measurement systems. Companies seeking complete automation solutions often complement these products with offerings from specialists like ASCO to create integrated control systems.
The Safety Selector Valve system enables simultaneous selection of pressure relief devices without requiring multiple vessel penetrations or complex mechanical linkages. This innovative design reduces installation complexity, minimises potential leak points, and decreases inlet pressure loss compared to traditional three-way block valve arrangements. The internal rotor mechanism smoothly diverts flow to either pressure relief device, completely isolating the inactive unit.
Tank protection products specifically address the unique requirements of refrigerated and cryogenic storage, including LNG, LPG, ethylene, and ammonia applications. These systems handle maximum allowable positive pressures up to 85 psig across process temperature ranges from negative 320°F to 300°F. Vacuum protection capabilities manage large capacity requirements where atmospheric pressure changes or liquid withdrawal could create damaging negative pressures. For comprehensive industrial supply needs, browsing complete product catalogues helps identify complementary valve and control solutions.
Proper valve selection begins with accurately defining service conditions, including fluid type, operating temperature, set pressure requirements, and required relief capacity. The three-step selection process involves preliminary valve type determination, orifice sizing calculations, and final model configuration. Understanding whether the application involves gas, vapour, liquid, or two-phase flow fundamentally influences valve design selection.
Set pressure determination must account for system operating pressure, allowable accumulation, and applicable code requirements. ASME Section VIII guidelines govern most pressure vessel applications, whilst Section I addresses boiler installations and Section XIII covers overfill protection systems. Inlet pressure loss calculations ensure adequate pressure reaches the valve, particularly in installations with long inlet piping or multiple fittings.
Orifice area calculations require applying appropriate correction factors for overpressure, back pressure, viscosity, and superheat conditions. The inlet flowing pressure equals set pressure minus inlet pressure loss plus allowable overpressure. Back pressure correction factors account for downstream conditions that could affect valve performance, particularly critical in closed discharge systems.
Viscosity corrections become necessary for liquids with kinematic viscosity exceeding one centistoke, as increased viscosity reduces effective valve capacity. Superheat factors apply to steam applications operating above saturation temperature at the relief pressure. Manufacturers provide comprehensive tables and charts to simplify these calculations, ensuring accurate valve sizing.
Selecting and maintaining pressure relief valves raises common questions amongst facility managers and engineers. Understanding these key aspects helps ensure optimal valve performance throughout the operational lifecycle.
Anderson Greenwood valves deliver proven pressure management solutions that protect critical industrial assets whilst maintaining operational efficiency across demanding applications. The comprehensive product range addresses requirements from compact direct spring models to sophisticated pilot operated systems capable of handling extreme pressures and temperatures. Selecting the appropriate valve type, properly sizing the orifice, and implementing regular maintenance ensures long-term reliability and safety.
Industrial facilities benefit from partnering with experienced suppliers who understand both the technical specifications and practical application requirements of pressure relief systems. For comprehensive industrial valve solutions and expert guidance on Anderson Greenwood products, contact Natradesource to discuss your specific application requirements and ensure optimal equipment selection.
North American Trade Source (NATS) is a trusted distributor of premium oil and gas equipment, committed to delivering innovative solutions and exceptional customer service worldwide.
