Flowserve Audco Gate, Globe, and Check Valves

Audco Gate, Globe, and Check Valves form the core multi-turn and non-return product suite within the Flowserve multi-brand portfolio. Primarily manufactured in heavy-duty bolted-bonnet or specialized pressure-seal configurations, these inline components provide reliable fluid isolation, flow regulation, and backflow prevention across steam, oil, gas, and chemical pipelines.

Designed explicitly for fully open or fully closed service where minimal line pressure drop is critical.

• Mechanical Build: Built with an Outside Screw and Yoke (OS&Y) layout and a rising stem design for immediate external confirmation of valve position.
• Flexible Wedge Configuration: The gate incorporates internal guide slots that match body ribs, facilitating self-aligning seating and preventing jamming under extreme line temperatures.
• Seal-Welded Seat Rings: The seat rings are permanently welded into the body cavity. This prevents loosening from high pipeline vibrations or rapid thermal cycles, eliminating potential bypass leakage paths.
• Design Compliance: Engineered to meet global standards like API 600 and ASME B16.34.

Engineered for micro-throttling, systemic flow regulation, and recurring open-close operations in extreme process networks.

• Plug & Ball Discs: Feature optimized ball-type contoured discs that provide linear flow control with repeatable throttling accuracy.
• Turbulence Reduction: Designed with streamlined internal flow passages and smooth transitions to drastically minimize body cavitation, erosion, and pressure drops.
• Fugitive Emission Packing: Outfitted with live-loaded graphite stuffing boxes or deep packing wells to ensure tight seal integrity against high-pressure steam and volatile chemical lines.
• Design Compliance: Manufactured strictly in accordance with international BS 1873 and ASME B16.34 benchmarks.

Automatic non-return security valves that protect rotating machinery (pumps, compressors) from back-surging line fluid.

• Swing-Type Geometry: Utilizes a heavy-duty pinned swing disc that opens completely under forward fluid force, ensuring a straight-through flow path with negligible friction.
• Low-Pressure Hydro-Sealing: Tested to tight parameters including dedicated low-pressure hydrostatic seating tests at 25% of the standard pressure rating to guarantee positive shutoff even during minimal return-flow speeds.
• Bolted Cover Construction: Features a simple top-entry bolted-bonnet cap for straightforward inline inspection, hinge-pin maintenance, or disc cleaning without pulling the main body off the pipeline layout.
• Design Compliance: Engineered to conform to BS 1868 and wall thickness directives under standard API 600 frameworks.

For extreme critical utility processes like high-pressure superheated steam or boiler feed lines (Class 900 to 2500), Audco provides Pressure Seal Bonnets rather than standard bolted designs. These use line pressure to compress an internal metal gasket against the bonnet wall—meaning the higher the line pressure, the tighter the valve seals, completely preventing body joint blowouts.

If you are updating your plant layout drawings, let me know the design temperature and corrosion factors of your media (e.g., saturated steam, sour crude oil, raw water). I can cross-reference the manufacturer’s trim charts to ensure you choose the correct material.