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Flowserve-Durco-Non-Lubricated Plug Valves - G4

Non-Lubricated Plug Valves - G4

BRAND: Durco

The Durco G4 Sleeveline plug valve is engineered for use the most corrosive and difficult chemical services where drop-tight shutoff is an absolute requirement. It offers the proven reliability of the plug/PTFE sleeve primary seal with a fluoropolymer diaphragm secondary seal.


  • Chemicals
  • Oil & Gas

industry sectors

  • Basic (Organic & Inorganic)
  • Specialty (Fine & Consumer)
  • Downstream Processing
  • ASME B16.34
  • ASME B16.10
  • API 607, ISO 15848-1
  • API 598
  • API 5
Design Range

Size Range: 1/2" - 18"

Pressure Class Range: class 150-300

Seating Material: PFA, Durlon II, UMPHWE, TFEG, TMHT

Features & Benefits

• Dependable, tight shutoff and in-line seal adjustment from tapered plug design

• Lower maintenance costs due to design that utilizes two adjuster fasteners that permit in-line seal adjustments under pressure within seconds

• Low fugitive emissions through fluoropolymer reverse-lip diaphragm that provides a pressure-activated, self-energizing dynamic and static stem seal

• Compatibility with a range of Automax actuators and other instrumentation

• Options for lethal, toxic and sub-zero fluid services plus process control and high flow requirements


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