Butterfly Valve, Lug Type, Concentric, ANSI 150LB
Features
Body Design |
One-piece body with pin & tapped-lug |
Disc Design |
Split shaft without pin |
Seat Type |
Hard-backed & Replaceable |
Operation Cycles |
Over 100,000 times |
Leakage Level |
Bubbles-tight sealing with no leakage |
Low Torque |
Operation easy and flexible |
Bidirectional Sealing |
Any installation position |
Low Flow Resistance |
Improve fluid efficiency and reduce energy consumption |
Coating Grade |
Conventional and special conditions of C1-C5 & CX |
Applications |
Chemical, petroleum, water and wastewater, mining, marine, etc |
Certificates |
ISO9001, CE, WRAS, ACS |
Specifications
Top Flange Standard |
AS Drawing |
End Flange Standard |
ANSI 150LB, MSS 150LB, AWWA C207 |
Face to Face Dimension |
API 609 |
Testing Standard |
API 598 |
Temperature |
-20℃~120℃ (depends on the sealing material) |
Body Material |
Cast Iron, Ductile Iron |
Disc Material |
Ductile Iron, Stainless Steel, Aluminum Bronze |
Shaft Material |
Stainless Steel, Monel K500, Duplex SS |
Seat Material |
EPDM, NBR, VITON, Silicon, CR |
Operator |
Lever, Gearbox, Pneumatic, Electric Actuator |
Dimension
Size |
D |
Ф D1 |
Ф D2 |
Ф D3 |
Ф D4 |
N-UNC-2B |
H |
L |
DN50 |
43 |
57.5 |
120.6 |
82.6 |
102 |
4-5/8-UNC |
9.5 |
245 |
DN65 |
45.5 |
72.3 |
139.7 |
82.6 |
102 |
4-5/8-UNC |
9.5 |
245 |
DN80 |
45.5 |
84.5 |
152.4 |
82.6 |
102 |
4-5/8-UNC |
9.5 |
245 |
DN100 |
51.7 |
106.4 |
190.5 |
82.6 |
102 |
8-5/8-UNC |
9.5 |
245 |
DN125 |
55 |
130.1 |
215.9 |
82.6 |
102 |
8-3/4-UNC |
12.7 |
281 |
DN150 |
55 |
153.7 |
241.3 |
82.6 |
102 |
8-3/4-UNC |
12.7 |
281 |
DN200 |
62.5 |
199.4 |
298.4 |
127 |
152 |
8-3/4-UNC |
12.7 |
380 |
DN250 |
67.6 |
247.5 |
361.9 |
127 |
152 |
12-7/8-UNC |
16 |
380 |
DN300 |
77.5 |
300.1 |
431.8 |
127 |
152 |
12-7/8-UNC |
19 |
380 |
The lug butterfly valve is recognized as one of the industry's most durable resilient-seated valves, suitable for diverse applications. It is available in tapped-lug designs and constructed from a range of materials, featuring a one-piece body that minimizes weight while maximizing strength. A unique stem-hole design maintains a dry stem journal, and its hard-backed seat ensures easy installation, reliable operation, and field-replaceability without special tools. Sizes range from 2 to 12 inches.
Engineered for long-term, maintenance-free service, this valve is widely used across industries such as chemical processing, oil and gas, water and wastewater, power, and mining. It provides bi-directional sealing at full rated pressure and includes an integral flange seal molded into the seat edge, compatible with ASME weld neck, slip-on, threaded, socket, and “stub end” type C flanges. The valve body meets ASME Class 150 rating (285 psi non-shock), with wafer bodies self-centering in ASME Class 150 flange patterns.