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  • 法兰限位伸缩接头1.jpg
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Flange limit expansion joint

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.

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Classification:

Ductile iron valve series

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Description


A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Product overview

Flange limit expansion joint is composed of body, sealing ring, gland, telescopic short tube and other major components. On the basis of the original performance of the loose sleeve expansion joint, a limiting device is added, and the maximum expansion amount is locked with a double nut. The pipeline can be freely expanded and contracted in the allowable expansion amount, and once it exceeds its maximum expansion amount, it will be limited to ensure the safe operation of the pipeline, especially suitable for
Vibrating or with a certain slope and bend in the pipeline connection. It is suitable for transporting sea water, fresh water, cold and hot water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, refined oil, air, gas, steam and granular powder with a temperature not higher than 250 ℃.

◆Technical parameters

Pressure rating   1.0MPa 1.6MPa
Test level Strength 1.5MPa 2.4MPa
Seal 1.1MPa 1.76MPa
Temperature -10 ℃ ~ 80 ℃
Medium Clear Water

 

◆ Main outline connection dimension

DN DW D K L D d d. no-do C1  C2  n1-Th*S N1-th * s3 n-Th
400 426 580 525 400 32.5 16-F30 28 38 4-M20*145 4-M20*280 16-M20
450 480 640 585 400 32.5 20-F30 30 42 5-M20*145 5-M20*280 20-M20
500 530 715 650 400 32.5 20-F33 32 46 5-M20*145 5-M20*280 20-M20
600 630 840 770 400 32.5 20-F36 36 54 5-M20*145 5-M20*280 20-M20
700 720 910 840 400 32.5 24-F36 40 40 6-M20*145 6-M20*280 24-M20
800 820 1025 950 600 65 24-F39 43 42 6-M24*240 6-M24*460 24-M24
900 920 1125 1050 600 65 28-F39 47 44 7-M24*240 7-M24*460 28-M24
1000 1202 1225 1170 600 65 28-F39 50 46 7-M24*240 7-M24*460 28-M24
1200 1220 1485 1390 600 65 32-F48 57 52 8-M24*240 8-M24*460 32-M24
1400 1420 1685 1590 640 65 36-F48 60 58 9-M24*240 9-M24*460 36-M24
1600 1620 1930 1820 640 65 40-F55 65 64 10-M24*240 10-M24*460 40-M27
1800 1820 2130 2020 640 65 44-F55 70 68 11-M24*240 11-M24*460 44-M27

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