Double eccentric butterfly valve

What is a keystone butterfly valve? The tilted and firmly secured disc, the optimised seal design and the corrosion protected shaft end zones are all features that exceed the market standards. Operation of the DEX may be done with a gearbox and handwheel or with electric, pneumatic or hydraulic actuator.

Eccentric butterfly valves are also defined as the double or the triple offset. With the triple offset butterfly valve there are three offsets. Two are placed in a similar position to the double offset butterfly valve , while the third offset is the geometry of the seating surface, creating a type of cone shape of the disc and seat.

This cone angle, along with the two eccentric shaft offsets, allows the disc to seal against the seat with no friction. The eccentric type can be single, double, or triple-offset type. The most accessible in the business sector for eccentric type are double-offset or triple-offset.

A few times this sub-sort of butterfly valve is additionally called as an elite butterfly valve. Double eccentric butterfly valves, also known as high-performance butterfly valves, have the shaft mounted slightly offset from the pipe centerline, and the shaft is mounted behind the sealing band of the seat. The seat is a narrow resilient ban clamped in the body and must be resilient.

The MD double eccentric butterfly model consists of a body with a sealing gasket (fixed with a steel ring) that allows a tight sealing of the disc. This design prevents fluid contact with the valve body to avoid corrosion. The double eccentric offset butterfly valve can also be called the high-performance butterfly valve or double eccentric butterfly valve.

This valve is suitable for thicker media that has a high pressure because its design does not allow too much contact with the disc and seat. Double flanged range of valves are double eccentric design butterfly valves. These are available in cast as well as fully fabricated design. These valves incorporate a double offset disc design, which practically eliminates any seat wear. Centered axis or eccentric butterfly valves do not present the correct performance when used for severe applications such as high temperatures or at high opening and closing frequencies.

FCA triple eccentric valves are designed to withstand this type of conditions that do not allow the use of soft seat butterflies. This minimises wear and ensures a long service life. The manufacturer shall have produced butterfly valves for a minimum of five years. All valves shall be Pratt ISO-DE Flanged Butterfly Valves and comply with the following details.

Doubly-eccentric butterfly valves (high-performance butterfly valves or double-offset butterfly valves) – different type of materials is used for seat and disc. Triply-eccentric butterfly valves (triple-offset butterfly valves) – the seats are either laminated or solid metal seat design. Lowest Prices - Huge PVC Warehouse. PVC Valve s - Low Prices, Buy Now. Direct Distributor Of FMC Butterfly Valve s. Call Us Today For Ordering Info!

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