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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