Wafer Lugged Butterfly Valve
Wafer Lugged Butterfly Valve
Spec Sheet: Wafer Lugged Butterfly Valve
The High-Performance Rubber-lined Butterfly valve matches in quality with the best in the world. All the typical weaknesses of standard Rubber-lined Butterfly valves have been eliminated such as:
• Dry stem: the sealing arrangement which utilizes the lining around the stem and extra O rings ensures that the line fluid can never get past the stem to corrode the shaft area and inner body of the valve.
• Replaceable liner: It is held rigidly in place and prevented from movement and damage by the blade action.
• Streamlined and polished disc: to ensure minimum pressure drop and low wear.
• One piece shaft: with the square connection between Stem and blade ensuring rigid connection and longer life.
Description
Wafer Lugged Butterfly Valve
Applications:
• This design has been used in the most difficult applications and where long life is expected.
• Water reticulation
• Low-pressure steam
• HVAC
• Mining: water and air
• Marine applications
• Sea water applications
INTERNAL DISC TO STEM CONNECTION
Square machined flats on the stem and in the disc. The non-wetted connections eliminate exposed external disc to stem connections. The disc and the stem connection minimize any play and result in secure fitment. Stem design incorporates a blowout-proof feature.
SEAT DESIGN
The seat is designed to seal with slip-on or weld-neck flanges and the molded o-ring eliminates the need for flange gaskets. The tongue and groove lock the seat in place and makes the valve capable of “dead-end” service. This resilient seated butterfly valve provides both a primary and secondary seal between the disc and seat as well as the stem and seat which ensures the total encapsulation of the line media and zero external leakage.
NOTES:
• Flange accommodation must be specified when ordering.
• Specify size, product name, part name, material, and flange accommodation when ordering spare parts.
• C = FTF ISO 5752 series 20 – NF E 29305 series 20 – MSS SP 67 – API 609 – DIN 3202 – BS 5155 – EN 558 (excl. DN350).
• Outside dimensions of the shafts are standard.
• For other valve sizes, see specific datasheets.
• (øG*) Ultra standard is square shafts for DN50-DN800, key drive for DN850-DN1000. Key drive for DN250-DN800 are available on request.
• 1 bar = 14.6 Psi
Specifications
| Size Range (PN10/16) | DN50 to DN1000 |
|---|---|
| Size Range (PN25) | DN50 to DN600 |
| Pressure Rating | PN10, PN16, PN25 |
| Temperature Range | -15°C to 120°C |
| Design Standard | ISO 5752-20 (face to face) |
| Flange Compatibility | DIN, BS4504, SANS1123, ANSI |
| Top Flange | ISO 5211 |
| Seat | Replaceable elastomeric liner |