Butterfly Valves

Butterfly valves are used to control and regulate or throttle the flow. They are characterized by fast operation and low-pressure drop. They require only a quarter turn from closed to full-open position. Butterfly valves are produced in sizes ranging from NPS 2 (DN 50) to over NPS 160 (DN 4000). They are usually manufactured in flanged, wafer, and lug, or single-flange-type designs. The welding-end style is a specially engineered valve for a specific application. Threaded-end, grooved-end, and shouldered-end butterfly valves are also available to satisfy the joint type selected for the piping system. Butterfly valves are produced with metal-to-metal seats, soft seats, and with fully lined body and disc. The soft seats permit bubble-tight shutoff and the full lining enhances erosion and corrosion resistance. Butterfly valves are suitable for low-pressure and low-temperature applications as well as high-pressure and high-temperature applications. The term high-performance butterfly valve is intended to signify their suitability for moderate- to high-pressure and temperature services. The butterfly valves have a low-pressure drop and high-pressure recovery factor. They are suitable for low-pressure drop applications. These valves are extensively used in large water transmission, distribution, and cooling water lines.

• The Compact Design Requires Considerably Less Space, Compared To Gate, Globe, Or Other Valves.
• Light In Weight.
• Quick Acting; As A Quarter-turn Valve, It Requires Less Time To Open Or Close.
• It Is Available In Large Sizes, Ranging From NPS 1¹⁄₂ (DN 40) To Over NPS 160 (DN 4000).
• They Have Low-pressure Drop And High-pressure Recovery.
• Provide Bubble-tight Service.

• Throttling Service Is Limited To Low Differential Pressure.
• Throttling Is Restricted To A 30- To 80-degree Disc Opening. Location Of Valve, Pipe Routing, Free, And Closed Discharge Are To Be Considered While Using A Butterfly Valve In A Throttling Application.
• Cavitations And Choked Flow Are Two Potential Concerns.
• The Disc Movement Is Unguided And Affected By Flow Turbulence.

• Cooling Water, Air, Gases, And Other Similar Applications, Such As Fire Protection, Circulating Water, Etcetera
• High-pressure And High-temperature Water And Steam Services.
• Throttling Service Involving Low Differential Pressures, As In Cooling Water Or Air Supply Systems
• Vacuum Service.
• Corrosive Services Requiring Lined Valves
• Instrument Root Valves Cooling Water And Feed Water Systems
• Slurry And Similar Services

• Design & Manufacturing – API 609 cat, A/B , ASME B 16.34
• Face to Face / End to End – API 609 , ASME B 16.10 , ISO 5752 Series 13, ISO 5752 Series 14
• End Connection – ASME B 16.5 for Flanged End upto 24”(DN600)
• ASME B 16.47 for Larger Sizes
• Testing – API 598
• Fire Test – API 607, API 6FA
• Fugitive Emission Testing – MESC 77/312, ISO 15848
• Material Conformance – NACE MR 01-75