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Flowserve AUDCO Butterfly Valves

Flowserve AUDCO Butterfly Valves are wafer type valves with an integrally moulded elastomer body liner which are designed to outperform loose liners. The elastomer liner of a Flowserve AUDCO Butterfly Valve is moulded directly in the body bore and vulcanised in-situ, to make it last the entire life of the valve. As a result, Flowserve AUDCO Butterfly Valves are totally maintenance-free. In other words, it is a fit and forget valve.

Flowserve AUDCO Butterfly Valves are available in different combinations of body, liner and disc materials to suit a wide range of line fluids, a size range of 50 to 600 mm, and a pressure rating up to PN 20. This permits its use in a wide range of applications making the Flowserve AUDCO Butterfly Valve a truly versatile valve.

Advantages of integrally moulded liner

Longer valve life​

Integral moulding permits maximising the use of plasticiser in elastomer formulation. This ensures a smooth surface, thereby reducing friction between the disc and liner. In-situ vulcanisation imparts greater strength to the liner. Reduced friction and high strength of the seat extend the life of the valve.

Superior seating

Integrally Moulded Liner of a Flowserve AUDCO Slimseal Butterfly Valve

The integrally moulded body liner of a Flowserve AUDCO Butterfly Valve is not subjected to stretching, which is the cause for fatigue in loose-lined elastomers. Fatigue in elastomer results in excessive wear and subsequent tearing of the liner. A torn liner can be easily swept into the line causing extensive damage to expensive down-stream equipment. Though in valves with loose liners the seat can be replaced, by the time it is done the line fluid would have caused some corrosion to the valve body. This causes imperfect seating of the new liner, resulting in leakages. These drawbacks are eliminated in a Flowserve AUDCO Butterfly Valve due to the integrally moulded liner design.

Shaft sealing

In Flowserve AUDCO Butterfly Valves, the rubber body liner incorporates flats at the top and the bottom where the shaft passes through, providing a wide sealing area. The secondary sealing is by two ‘O’ rings that are moulded at the top and bottom of the seat, which get compressed around the shaft. A weatherseal at the top of the shaft prevents any ingress of foreign material into the valve.

Shaft sealing of Flowserve AUDCO Slimseal Butterfly Valve

Fully isolated valve internals

The wide sealing area of a Flowserve AUDCO Butterfly Valve also ensures the line fluid does not enter the stem area and get contaminated.

Easy installation

Easy installation of Flowserve AUDCO Slimseal Butterfly Valve

Flowserve AUDCO Butterfly Valve has a gasket integral to the body which eliminates the need for a separate gasket between the valve face and companion flange. In addition, as the liner is bonded to the body, it will not hang out or get pinched during installation. Damage to expensive replaceable seats is thereby eliminated.

Slimseal PN16 / PN20 / Chemseal / Cleanseal

The valves have been designed to fit without gaskets between flanges drilled to BS 10 Tables D & E, ASME B16.1 / B16.5 Class 150, DIN ND 10/16, EN1092 – PN10/16, IS 6418 Tables 6 to 9 or IS 6392 Tables 10 to 20.

Lugged valves are provided with tapped holes as per ASME B16.1 Class 125 (UNC).

Body top platform drilled to ISO 5211 to facilitate direct mounting of actuators and gear units.

Accessories

Flowserve AUDCO Butterfly Valves can be supplied with factory fitted pneumatic, hydraulic or electric actuators along with other accessories such as limit switches, manual overrides, positioners etc., to form a complete flow control package.

Write to us for more information regarding price or availability. We can ship to almost anywhere across the world.

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