G4

G4

The Durco G4 Sleeveline plug valve is designed for the most corrosive and challenging chemical services, where drop-tight shutoff is essential. It delivers proven reliability with its primary seal featuring a plug/PTFE sleeve and a secondary seal provided by a fluoropolymer diaphragm.

Brand: Durco
Category: Plug
Industries Chemicals: Basic (Organic & Inorganic), Specialty (Fine & Consumer), Petrochemicals, Oil & Gas: Downstream Processing
Face-to-Face Standard ASME B16.10
Guiding NA
Trim NACE / Severe Service (TSG4), Fire Sealed (G4Z), V-Port Control, High Cycle (G4B Marathon)
Valve Size 1/2” to 20”
Pressure Class Standard ASME B16.34
Design Temperature -46°C to 288°C
Bonnet Standard Bolted Cover, Top-Entry Design
Packing Live-Loaded, PTFE and Fluoropolymer Double Seal, PTFE Diaphragm, PTFE V-Ring, Grafoil for high-temperature applications
Pressure Class Range Class 150, 300
Trim Characteristics NA - On-Off Service
Seating Metal-to-Metal & Soft Seat (PTFE, Durlon ll, Glass Filled PTFE, UHMWPE, PFA, TMHT)
End Connections Flanged (RF, RTJ, and Flat Faced), Threaded (NPT), Socket Weld (SW), Butt Weld (BW)
Shut-Off Classification ANSI FCI 70-2 Class IV, VI (Soft Seat)
Body Non-Lubricated Plug - ASTM A216 WCB Carbon Steel, ASTM A351 CF8M 316 Stainless Steel, ASTM A351 CD4MCuN 254 SMO, and more ETO.

Reliable tight shutoff and in-line seal adjustment provided by the tapered plug design.

Reduced maintenance costs with a design featuring two adjuster fasteners, allowing quick in-line seal adjustments under pressure.

Minimized fugitive emissions through a fluoropolymer reverse-lip diaphragm, offering a pressure-activated, self-energizing dynamic and static stem seal.

Compatible with various Automax actuators and other instrumentation for versatile operation.

Options available for handling lethal, toxic, sub-zero fluid services, as well as meeting process control and high-flow demands.

Design Standards ASME B16.10 - Face to Face dimensions
ASME B16.34 - Flanged and Butt-Welded End Connections
API 598 – Valve Leakage Testing
API 599 – Valve Design
Certifications API 607 – Fire Safe
ISO 15848-1 – Fugitive Emissions
Quality ISO 9001