What is butterfly valve

Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switch control of low-pressure pipeline medium. Butterfly valve refers to a valve whose closing part is a disc, which rotates around the valve shaft to achieve opening and closing.

Types: - Double & triple eccentric, high performance HP butterfly valve,

- Flanged, lug, wafer

Standards: EN, ANSI, DIN

Sizes: DN 40 - DN 600, 1 1/2” - 24”

Pressure: PN 6 - PN 64, Class 150 – 600

Material: Carbon and stainless steel, bronze, ductile iron, duplex, superduplex

Sealing: NBR, FKM, metal/metal, PTFE

Operating: Handlever, gear operated, pneumatic and electric actuator

Connections: EN1092, ASME B16.5, others on request

Testing: Acc. to EN 12266-1, 2 (DIN3230), API 598, others on request

JST mainly design and manufacturer the spring seals includes the high pressure PTFE gasket, stainless steel spring, compression ring for the butterfly valve from DN 80 to DN 600, see below drawing.

Wide temperature range -50°C to +190°C, Pressure: up to 1000 bar, Media: Gasses and Fluids

High Pressure capability

Excellent corrosion resistance

No age limitations on PTFE material

Designs suitable for back pressure / double acting pressure

Machined production – fast turnaround of orders

Size range from 3mm to 2,5m diameter – larger sizes

available with ‘welded’ designs

Breakdown fast delivery options available (24hrs service)

Customer specific part number systems for quick specification & ordering

JST make the seals for different valves, and got very good feedback from clients globally.