Product Tag: steam pressure relief valve

Besa – Series 240 Safety Valve DN20-400 PN16-40 / 3/4″-16″ ANSI 150-300

Reliable Overpressure Protection for Industrial Service

The Besa Series 240 Safety Valve is a spring-loaded safety valve designed to protect pressure vessels, pipelines, and process equipment from overpressure conditions in air, gas, steam, and liquid services. Manufactured in accordance with EN 4126, the Series 240 is selected where certified pressure relief performance, stable operation, and long-term mechanical reliability are required in industrial duty.

The valve is based on a semi-full or full nozzle design, with precision-machined stainless-steel internals to ensure accurate opening pressure, controlled blowdown, and repeatable reseating. Body options include cast iron, carbon steel, or stainless steel, with variants available in thermoplastic-lined execution for corrosive media. The design allows operation across a wide pressure and temperature range while maintaining compliance with PED and ATEX requirements.

Series 240 safety valves are commonly installed in chemical plants, pulp & paper mills, petrochemical facilities, utilities, and general process industries, where dependable overpressure protection and certification are mandatory. Flanged EN and ANSI connections are available, and the range covers a broad selection of sizes and pressure classes to suit standardised plant layouts.

Key Benefits for Technicians, Engineers & Production Managers

  • Accurate overpressure protection — EN 4126-compliant nozzle geometry ensures predictable opening and stable discharge characteristics.
  • Regulatory compliance assured — PED and ATEX certification supports use in regulated pressure equipment installations.
  • Consistent reseating performance — precision-guided internals maintain tight closure after relief events.
  • Material compatibility with process media — multiple body and trim options allow matching to corrosive, clean, or utility services.
  • Reduced maintenance risk — robust mechanical construction limits wear under cyclic or continuous operation.
  • Simplified plant integration — standard EN and ANSI flanged connections suit existing piping systems.
  • Lifecycle support available locally — repair, testing, and spring-pressure calibration services support ongoing compliance.

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Besa – Series 290 Safety Valve / API 526 1″-10″

Reliable Overpressure Protection for API 526 Duty

The Besa 290 API safety valve is a spring-loaded pressure relief valve designed to protect pressurised equipment against overpressure in steam, gas and liquid services. It is built in accordance with API 526 and uses an adjusting ring to tune opening and reseat behaviour, which is important where stable lift, repeatable blowdown and controlled closing are required across changing process conditions.

For typical plant duties, the Besa 290 is supplied in flanged patterns with high-flow, full-nozzle construction and a defined performance basis aligned to API sizing practice (API RP 520 basis is referenced in the 290 technical bulletin flow-rate notes). The published operating characteristics for the 290 series include effective discharge coefficients (Kd) for gas/vapour and liquid service and standard overpressure and blowdown expectations used during sizing and selection.

For technicians, engineers and production managers, this means:

  • Fewer nuisance lifts — the adjusting ring allows set-up of stable popping and closing behaviour for consistent relief performance.
  • More predictable capacity sizing — published Kd values support repeatable engineering calculations for gas/vapour and liquid duty.
  • Clear protection margins — defined overpressure basis (gas/vapour vs liquid) supports compliance with typical relief design assumptions.
  • Controlled return to service — defined blowdown expectations help avoid extended loss of product or unstable reseating after a lift event.
  • Simpler plant standardisation — one API-pattern valve family covers steam, gases and liquids, reducing spares variety across units.
  • Improved maintainability planning — optional accessories such as test gag and limit switch support functional checks and lift indication where required.
  • Material fit for duty — availability of carbon steel and stainless steel constructions supports common refinery, chemical and utility services.
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