Llug 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.
FEATURES
1,ISO5211 top flange together with stem square suitable for direct mounting of actuators
2,Stem anti-blowout design keep safety in field use
3,Dirtscraper prevents moisture penetrating into the shaft area
4,Suitable for high pressure and full vacuum service due to the use of a cartridge seat design
5,Full rated unidirectional dead-end service is achieved by a lip designed in the lug body
6,No exposed pins or bolts for stem-to-disc connection
7,No need for flange gaskets
8,No risk of damage to the valve during installation in closed position
9,Bubble-tight shut of at full pressure rating
10,Large flow capacity and enough strength because of streamline disc design
11,Plug with O-ring sealing eliminates any leakage from the stem
PARTS LIST AND MATERIAL SPECIFICATION
| 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 |
TECHNICAL DATA
| 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 |
