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The GKV-830 Double Eccentric Butterfly Valve is engineered to deliver maximum value and reliability, proven through extensive endurance testing. It has successfully completed over 100,000 cycles at 720 psi (49.6 Bar) and more than 878,000 cycles at 2 psi (0.1 Bar), all while maintaining a bi-directional zero-leakage seal, ensuring long-lasting performance in critical applications.
GKV-830 can provide solid reliability and easy on-site maintenance.
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GKV830 DOUBLE ECCENTRIC BUTTERFLY VALVE FLANGE END
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Size Range 2"~160"（DN50~DN4000）
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Body Materials Carbon steel (WCB, A105), stainless steel (CF8/CF8M, CF3/CF3M), alloy steel (F22, WC6, WC9), duplex/super duplex (2205, 2507), nickel-based alloys (Inconel, Hastelloy, Monel), or special materials (Titanium, Zirconium, Tantalum).
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Temperature Range -320°F to 842°F（-196°C to 450°C）
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Stem Materials 17-4PH, 410 Stainless Steel, XM-19 (Nitronic 50),stainless steel (410, 420, 431, 17-4PH, 316) or nickel-based alloys, optionally hardened or coated for extra strength and wear resistance |
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Maximum Allowable Operating Pressure ASME 150LB, 300LB, 600LB 900LB/ EN 1092 PN 10, 16, 25, 40, 63, 100, 150
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Seat Materials Features laminated stainless steel with graphite, hard-faced alloys, or soft seals (PTFE, RPTFE, Viton, EPDM) depending on application.
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Shut off Rating Zero Leakage
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Disc Materials Stainless steel, duplex stainless steel, or nickel-based alloys, with optional hard-facing (Stellite, WC) or HVOF coating for wear and corrosion resistance. |
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Design Standard API 609, ASME B16.34, ASME VIII, API 600 |
Flange Drilling ASME B16.5, ASME B16.47, EN 1092, ISO 7005 |
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End Connections Wafer, Lug, Double Flanged |
Testing standard ISO 5208, EN12266-1, API 6D, API 598, BS 6755 |
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Ports Full bore |
Connect Platform ISO5211, Bracket |
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Face To Face AAPI 609, ASME B16.10, ISO 5752, EN 558 |
Applications Oil and gas, steam, power generation, refining, chemical processing |
GKV-830 Double Eccentric Precision Engineering Butterfly Valve
The unique simple and innovative design of GKV-830 high-performance double eccentric butterfly valve provides solid reliability, and on-site maintenance is also extremely easy.
ProCentric Double Offset
The first offset is between the center of stem and the center of the seat.
The second offset is between the center of the valve and the center of
the stem. This offset allows the disc to swing free of the seat in the open
position. This procentric action reduces seat wear, and minimizes seating
torque to create an eccentric seating actionfor high cycle applications.
Lip-type seal
Pressure assisted reinforced seats offer bi-directional bubble tight close off.
Fire Safe Seat
The seat ring is engineered to seal off pipeline flow in the event of a fire.
In normal operation the seat with metal back up ring allows bi-directional
bubble tight close off up to the full ANSI rating. In the event of a fire, if the
fire destroys any part of the PTFE encapsulated seat, the inconel metal
back up ring will stay in constant contact with the disc to provide a metal
to metal back up seal. In emergency fire conditions, the line pressure is
immediately reduced and the area is foamed to extinguish the fire.
Stem Packing:
Graphite provides positive sealing for fire-safe.
Seat Retainer:
Reliable multi-bolt retainer holds and supports the seat.
Standard valves are suitable for bi-directional dead-end service at
the full pressure temperature rating of the valve.
Body:
Robust one-piece casting in WCB carbon steel or CF8M stainless
steel. Available in wafer & lug style.
Fire-proof seat:
Bi-directional seal soft seat for non-leakage.
Bearing:
Full length provides maximum stem support.
Thrust Ring:
Centers the disc. Ensures tight shut off and long service life.
The unique design of GKV-830 double eccentric butterfly valve.
The GKV-830 double eccentric butterfly valve adopts a standardized high-strength, integrated stem design to achieve interchangeability with GEKO actuators.
The PTFE packing ring with carbon fiber anti extrusion ring can perform continuous compression, providing reliable sealing around the valve stem. Provides multiple combinations for high temperature, high cycle, and fire protection applications.
Provide bidirectional zero leakage sealing while isolating the booster and pipeline medium.
GKV-830 series double eccentric butterfly valve is applied in multiple industries
Petrochemical and natural gas industries
Steel and Chemical Industry
Ship and Ocean Engineering
Environmental Protection and Industrial Water Treatment
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The GKV-830 Double Eccentric Butterfly Valve is engineered to deliver maximum value and reliability, proven through extensive endurance testing. It has successfully completed over 100,000 cycles at 720 psi (49.6 Bar) and more than 878,000 cycles at 2 psi (0.1 Bar), all while maintaining a bi-directional zero-leakage seal, ensuring long-lasting performance in critical applications. GKV-830 can provide solid reliability and easy on-site maintenance.
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Double Eccentric Butterfly Valve - English
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