LTD373H Features and performance
It is widely used for cutting off or regulating medium flow in low pressure, medium pressure, high pressure, steel, metallurgy, petroleum, chemical, electric power and other industrial pipelines.
The valve adopts a three-dimensional eccentric oblique cone seat sealing pair, and the butterfly plate seal is formed by laminating a new metal piece and an elastic material and is fitted on the butterfly plate to match the valve seat. The disc is swayed and pressed tightly, so the frictional resistance of the sealing surface is small, and the tighter function is closed when closed, so that the sealing performance is reliable, and the opening ensures that the sealing surface is completely out of contact, thereby ensuring that the sealing surface is not damaged.
The butterfly valve structural feature eliminates the disadvantages of other types of butterfly valves that are over-opened and cannot be sealed, and can be used normally at high temperatures, overcoming the shortcomings of other types of valves that are prone to leakage due to thermal expansion when applied at high temperatures.
The butterfly valve selects different sealing surface materials according to the requirements of the use medium to ensure that the sealing surface is resistant to abrasion, erosion, corrosion and long service life.
Standard
Flange connection size: ANSI B16.5-92
Structure length: API 609-89
Pressure test: API 598-94
The main technical parameters
Nominal pressure PN 150Lb 300Lb
Strength 3.0Mpa 7.5Mpa
Sealing 2.2Mpa 5.5Mpa
Applicable medium: Water, steam, oil, acid and alkali, seawater, etc.
Temperature: -40～425℃
Main Parts materials
Body/Disc: WCB/CF8/CF8M
Stem: Cr13/304/316
Sealing ring|: 304/316
Packing: flexible graphite, fluoroplastic
Main External and Connecting Dimensions
DN L(W) L(F) D D1 C Z-d
2" 43 150 165.1 127 22 8-19
21/2" 46 170 190.5 149.4 26 8-22
3" 48 180 209.5 168 28 8-22
4" 54 190 254 200 32 8-22
5" 56 200 279.4 235 35 8-22
6" 59 210 317.5 269.7 37 12-22
8" 73 230 381 330.2 41 12-25
10" 83 250 444.5 387.4 48 16-28
12" 92 270 520.7 450.9 51 16-32
14" 117 290 584.2 514.4 54 20-32
16" 133 310 647.7 571.5 57 20-35
18" 149 330 711.2 628.7 60 24-35
20" 159 350 774.7 685.8 64 24-35
24" 181 390 914.4 812.8 70 24-41
