Flowserve’s Durco® G4XZ

Low-Emission Plug Valve

Flowserve engineered the Durco® G4XZ low-emission plug valve to perform reliably and guarantee compliance with probably the most stringent ISO and API fugitive emissions requirements, together with ISO 15848-1-BH-CO3 and API 641 1st version. The G4XZ valve can be used in hydrofluoric acid (HF) alkylation business processes including:

Crude desalting

Gas vegetation


Light ends

Sulphur crops


Anhydrous hydrochloric acid (HCl)

Hydrofluoric acid (HF)

The versatile G4XZ valve also can be utilized for deadly, poisonous and sub-zero fluid providers corresponding to chlorine, anhydrous hydrogen chloride, phosgene, propylene oxide, isobutane and HF acid.
Reduced fugitive emissions

Operators can install the Durco G4XZ valve with confidence in functions with unstable air pollution and dangerous fluids. The Durco G4XZ valve design has undergone rigorous testing and is certified to probably the most stringent trade standards, together with ISO 15848-1-BH-CO3 (2,500 mechanical cycles) and API 641 1st edition.
Engineered for safety

The G4XZ valve ensures increased plant and personnel security through its fire-safe design and construction that complies with API 607 7th edition and ISO 10497 2010 fire-safe standards (for external leakage only).
Improved ไดอะแฟรม ซีล and uptime

The tight shut-off performance is repeatable and dependable to minimize unforeseen downtime; The G4XZ valve design doesn’t require lubrication for sealing. Instead, the plug can merely be adjusted further into the sleeve to enhance sealing capability.
Simplified, in-line maintenance

Design features an unbiased plug, packing and top cap seal that enable easy adjustment or re-energization of seals as wanted.

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