Description
Lug butterfly valve
Lugged butterfly valve, the ideal solution for many industrial applications. Featuring a cartridge type seat, streamlined disc and strong stem-to-disc connection, this concentric butterfly valve is designed for easy use in all industries including food and beverage, pulp and paper, chemical, mining, water treatment and power plants. The lug body comes with a lip design that ensures full rated unidirectional dead-end service. Additionally, this device is equipped with features like ISO5211 top flange together with stem square suitable for direct mounting of actuators, stem anti-blowout design for safety in field use and dirt scraper to prevent moisture from entering the shaft area. It also boasts of no exposed pins or bolts for stem-to-disc connection or flange gaskets required.
Description
Lug concentric butterfly valve features a cartridge type seat, streamlined disc and strong stem-to-disc connection for easy use in many industrial applications such as food and beverage, pulp and paper, chemical, mining, water treatment, power plants, etc. Full rated unidirectional dead-end service is achieved by a lip designed in the lug body.
Key Features:
- Designed for easy actuator mounting with ISO5211 top flange and stem square.
- Enhanced safety with anti-blowout stem design.
- Built-in dirtscraper prevents moisture from entering the shaft area.
- Suitable for high pressure and vacuum service thanks to cartridge seat design.
- Provides full-rated unidirectional dead-end service with lip in the lug body.
- Secure stem-to-disc connection with no exposed pins or bolts.
- Eliminates the need for flange gaskets.
- No risk of valve damage during closed position installation.
- Ensures a tight shut-off at full pressure rating.
- High flow capacity and strength due to streamlined disc design.
- O-ring sealed plug eliminates stem leakage.
| NO. | Part name | Material |
| 1 | Body | ASTM A536 65-45-12, WCB, CF8M |
| 2 | Disc | ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462 |
| 3 | Seat | EPDM, NBR, FPM |
| 4 | Stem | SS420, SS431 |
| 5 | Lower Stem | SS420, SS431 |
| 6 | Retainer | Nylon for DN50-DN300, SS304 for DN350-DN2000 |
| 7 | Bearing | RPTFE with Graphite on I.D. |
| 8 | Weather seal | NBR |
| 9 | Weather seal | NBR |
| 10 | Plug | Steel galvanized for DN50-DN300, Cover plate for DN350-DN2000 material same as body with SS304 bolts |
| 11 | Screw | SS304 |
PARTS LIST AND MATERIAL SPECIFICATION
| Body style | FLug |
| Nominal diameter | 2″ – 80″ (DN50mm – DN2000mm) |
| Top flange | ISO5211 |
| Operating pressure | 16bar for DN50-DN300, 10bar for DN350-DN2200 |
| Temperature range | -20 °C to + 140 °C (depending on pressure, medium and material) |
| Flange accommodation | EN 1092 PN 6/PN10/PN16 ASME Class 150 AS 4087 PN10/ PN16 JIS 5K/10K |
| Applications | Potable Water, Wastewater, Seawater, HVAC |
| Operation | Hand lever, gear box, pneumatic actuator, electric actuator |
