LT Type High Performance Wafer Butterfly Valve Cast Iron Zero
Leakage
Structure:
A wafer butterfly valve consists of a round or disc-shaped body
with a central opening and a disc or butterfly-shaped closure
element inside the body. The closure element, known as the
butterfly disc or wafer, is connected to a shaft or stem that
extends outside the valve body. The valve body has flanges on both
sides for easy installation between pipe flanges.
Operation:
The wafer butterfly valve operates by rotating the disc or
butterfly element within the flow path. When the disc is in a
closed position, it blocks the flow completely, and when fully
open, it allows maximum flow through the valve. The disc can be
positioned anywhere in between to regulate the flow rate.
Parameters:
| 公称通径DN | 尺寸Size(mm) | 重量(kg) |
| A | B | C | D | L | H | D1 | N-φ | K | E | n1-φ1 | Φ2 | G |
| mm | inch | LTD71/371/671/971X-1.0/1.6 |
| 50 | 2’ | 161 | 80 | 42 | 52.9 | 32 | 88.39 | 125 | 4-M16 | 77 | 57.15 | 4-6.7 | 12.6 | 118 | 3.8 |
| 65 | 2.5’ | 175 | 89 | 44.7 | 64.5 | 32 | 102.54 | 145 | 4-M16 | 77 | 57.15 | 4-6.7 | 12.6 | 137 | 4.2 |
| 80 | 3’ | 181 | 95 | 45.2 | 78.8 | 32 | 61.23 | 160 | 8-M16 | 77 | 57.15 | 4-6.7 | 12.6 | 189 | 4.7 |
| 100 | 4’ | 200 | 114 | 52.1 | 104 | 32 | 68.88 | 180 | 8-M16 | 92 | 69.85 | 4-10.3 | 15.77 | 206 | 9.0 |
| 125 | 5’ | 216 | 127 | 54.4 | 123.3 | 32 | 80.36 | 210 | 8-M16 | 92 | 69.85 | 4-10.3 | 18.92 | 238 | 10.9 |
| 150 | 6’ | 226 | 139 | 55.8 | 155.6 | 32 | 91.84 | 240 | 8-M20 | 92 | 69.85 | 4-10.3 | 18.92 | 266 | 14.2 |
| 200 | 8’ | 260 | 175 | 60.6 | 202.5 | 45 | 112.89 76.35 | 295 | 8M20 12-M24 | 115 | 88.9 | 4-14.3 | 22.1 | 329 | 18.2 |
| 250 | 10’ | 292 | 203 | 65.6 | 250.5 | 45 | 90.59 91.88 | 350 355 | 12-M20 12-M24 | 115 | 88.9 | 4-14.3 | 28.45 | 393 | 26.8 |
| 300 | 12’ | 337 | 242 | 76.9 | 301.6 | 45 | 103.52 106.12 | 400 410 | 12-M20 12-M24 | 140 | 107.95 | 4-14.3 | 31.6 | 462 | 40 |
| 350 | 14’ | 368 | 267 | 76.5 | 333.3 | 45 | 89.74 91.69 | 460 470 | 16-M20 16-M24 | 140 | 107.95 | 4-14.3 | 31.6 | 515 | 56 |
| 400 | 16’ | 400 | 309 | 86.5 | 389.6 | 51.2 72 | 100.48 102.42 | 515 525 | 16-M24 16-M27 | 197 | 158.75 | 4-20.6 | 33.15 | 579 | 96 |
| 450 | 18’ | 422 | 328 | 105.6 | 440.51 | 51.2 72 | 88.38 91.51 | 565 585 | 20-M24 20-M27 | 197 | 158.75 | 4-20.6 | 38 | 627 | 122 |
| 500 | 20’ | 480 | 361 | 131.8 | 491.36 | 64.2 82 | 96.99 101.68 | 620 650 | 20-M24 20-M30 | 197 | 158.75 | 4-20.6 | 41.15 | 696 | 202 |
| 600 | 24’ | 562 | 459 | 152 | 592.5 | 70.2 82 | 113.42 120.46 | 725 770 | 20-M27 20-M33 | 276 | 215.9 | 4-22.2 | 50.65 | 821 | 270 |
Note:
DN50(2”)-600(24”) "LT" type butterfly valve is suitable for two
pressure levels: PN1.0/PN1.6MPa. There are two sizes in each grid
in the table, indicating PN1.0/PN1.6MPa respectively. For pressure
level connection dimensions, the pipe flange connection dimensions
connected to the valve refer to the flange connection dimension
table. The upper flange of the butterfly valve can be universally
used for manual, worm gear, electric, pneumatic and other
transmission devices.
The structure, performance, and materials of parts of the "LT" type
butterfly valve are the same as those of the "A" type. The
difference is that the "A" type can be centrally connected between
two pipe flanges through stud bolts (or extended hexagonal bolts)
(i.e. clip-on type).
In addition to being connected between two pipelines through two
ordinary hexagonal bolts, the "LT" type can also be installed on
the pipe end (i.e. single clamp type) and used as a drain valve,
but the use of the pipe end must be specified in the order
contract.
The flange connection dimensions comply with G4216, DIN2501,
BS4504, BS10-E, JSB2220, AS2129.ANSIB16, and other standards, and
must be specified by the user in the contract.
Advantages:
Compact and lightweight design, making them easier to install and
handle.
Quick and easy operation with a quarter-turn motion.
Good flow control characteristics and low pressure drop.
Cost-effective compared to other types of valves.
Suitable for various applications, including HVAC, water treatment,
chemical, and industrial processes.
Applications:
Wafer butterfly valves are commonly used in applications where
space and weight are constraints, such as in HVAC systems, water
treatment plants, and industrial processes. They are suitable for
controlling the flow of liquids, gases, and slurries in a wide
range of industries.
