• Severe Service Product

    E30 / E40 / E50 / E60 / E70 / E80 Series

    High-pressure-dropservice causes cavitation, flashing, noise and vibration (referred to as Severe Service), significantly shortening valve life and endangering plant safety. CenturyVal's E30–E80 trims use special single-stage/multi-stage pressure reduction and velocity control to prevent local pressure dropping below vapor pressure, mitigating cavitation and suppressing noise. When necessary, a restriction orifice plate can be added in series to share remaining pressure drop, forming a complete severe service solution.

  • Features

    • The range includes sixtrims covering single-stage/multi-stage pressure reduction, cage-guided low-flow, anti-rotation and V-port plugs;
    • The multi-hole structurecontrols noise by dividing high-velocity streams into small jets that expand and drop pressure stage by stage, avoiding large pressure drops at the vena contracta;
    • Multi-stage pressurereduction makes flow passage pressure more uniform, reducing the risk of local pressure falling below vapor pressure, while residual cavitation energy is confined to the flow field center to protect the plug and seat from erosion;
    • Trim type and stage countare selected using cavitation index σ and pressure ratio P1/P2, with a sizing calculation sheet issued for each service;
    • The top-entry design allowstrim removal without removing the valve body, and is interchangeable with E10/E20 series to facilitate in-service upgrades and reduce spare parts costs;
    • Materials include20Cr13/HT, 316/STL, Monel, etc.; sealing surfaces can be Stellite-hardfaced; extended bonnet is available for –196 °C cryogenic service; bellows seal is optional for low fugitive requirements.
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    • Cage‑guided, balanced plug, suitable for lower‑thrust actuators;
    • Single‑stage multi‑holepressure‑reducingflow path, anti‑cavitationand noise reduction;
    • Nominalsizes DN25 and above;
    • Top-entrydesign; trim can be removed for maintenance without removing the valve body;
    • Typical applications: medium pressure drop gas, liquidand steam pressure reduction, venting, etc.
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    E40 Multi-Stage Multi-Hole Cage

    • Cage-guided,balanced plug; stable operation;
    • Multi-stagemulti-hole pressure-reducing flow path – distributes ΔP gradually, significant noise reduction;
    • Suitablefor high pressure ratios or noise-exceeding services;
    • Top-entrydesign; trim can be removed for maintenance without removing the valve body;
    • Interchangeable with E20 series bodies – facilitates in‑service valve upgrades.
    • Typicalapplications: high pressure drop gas and liquid pressure reduction, venting, etc.
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    Specifications

    • Cage-guided,balanced plug; stable operation;
    • Multi-stagemulti-hole pressure-reducing flow path – distributes ΔP gradually, significant noise reduction;
    • Suitablefor high pressure ratios or noise-exceeding services;
    • Top-entrydesign; trim can be removed for maintenance without removing the valve body;
    • Interchangeable with E20 series bodies – facilitates in‑service valve upgrades.
    Section image

    Specifications

    • Cage-guided,balanced plug; stable operation;
    • Multi-stagemulti-hole pressure-reducing flow path – distributes ΔP gradually, significant noise reduction;
    • Suitablefor high pressure ratios or noise-exceeding services;
    • Top-entrydesign; trim can be removed for maintenance without removing the valve body;
    • Interchangeable with E20 series bodies – facilitates in‑service valve upgrades.

  • Documents

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