Soft seated high performance butterfly valve provide a bi-directional bubble-tight shutoff (zero leakage) by the use of a patented seat. This high performance butterfly valve unique seat design creates a self-energized seal in vacuum to low pressure applications. Under higher pressure conditions, the seat is also designed to permit, confine and direct movement of the soft seat against the disc edge, up to the full ASME Class 150/300/600 and PN16/25/40/100 Working Pressures.
Soft seated high performance butterfly valve is designed for high services with minimal wear and low torque. Seat replacement is a simple operation, requiring no special tools.
Soft seated high performance butterfly valve specification
Sizes available: 2″-80″ (50-2000mm)
Body Connection: Wafer type
Body Materail: WCB, 304SS, 316 SS (A351-CF8 CF8M)
Disc Materail: WCB, 304SS, 316 SS (A351-CF8 CF8M)
One piece stem: 17-4PH or 316SS
Packing: PTFE or graphite
Unique Seats Design: Soft Seat, Metal Seat or Fire Safe Seat
Manual Operator: Lever Handle, Worm Gear Operator
Automatic Operation: Pneumatic Spring Return, Pneumatic Double Acting, Electric Motor
Pressure ratings: ANSI Class 150, 300, 600; DIN ISO PN16, PN25, PN40, PN100
Shell/Seat Test: API 598
Soft seated high performance butterfly valve feature
• One-piece stem design with ISO 5211 square drive
• ISO 5211 direct mounting flange on the valve body
• Easy-adjust gland packing accessible with actuator mounted in place
• Belleville washers on the gland nut offer reliable primary sealing between shaft and packing
• Retaining ring for both equably pressing on packing and stem blowout proof
• Multiply rows of RPTFE chevron for soft seat valve and Graphite chevron for fire safe and metallic seat
• Extended neck for pipe insulation
• Self-energized seat resulting in longer life and reduced maintenance Pin-less shaft to disc connection makes the valve convenient for parts replacement and reliable even under corrosion
• Seat retainer supports the seat and allows for easy changeout
• Double offset disc reducing the valve torque
• Alloy harden disc surface for metal seat increases the sealing life time
• Integral disc stop prevent disc from over travel
• Soft seat, fire safe seat and metallic seat are replaceable each other
• PTFE lined SS316 bearing support stem and increase service life
• Thrust ring for anti-blowout and anti-static
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