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.
Key words:
Classification:
Ductile iron valve series
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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