Silencing slow closing check valve
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
HH46X, HH48X, HH49X silencing slow closing check valve series products can be used in water, sewage, sea water and other media drainage pipeline, not only to prevent the backflow of the medium, but also can effectively limit the destructive water hammer, to ensure the use of pipeline safety. It has the characteristics of novel structure, small size, light weight, low fluid resistance, reliable sealing, stable opening and closing, wear resistance, long service life, oil pressure and slow closing are not affected by the medium, and have better energy-saving effects.
◆Technical parameters
Nominal pressure: 1.0 ~ 2.5MPa
Nominal diameter: 40~1000mm
Slow closing time: 3~60 seconds
Test standard: GB/T 13927
Applicable medium: water, sea water, sewage
Applicable temperature: 0~80 ℃ (if necessary, up to 200 ℃)
Flange standard: GB/T17241.6
Test standard: GB/T 13927
◆ Typical installation diagram
◆ Material of main parts
| Part Name | Valve body | Disc | Stem, cylinder, piston | Spring | Valve seat |
| Materials | Cast iron, ductile iron | Carbon Steel | Stainless Steel | Stainless Steel | nitrile rubber |
◆ Main outline connection dimension
| DN | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 |
| L | 140 | 150 | 170 | 180 | 190 | 200 | 210 | 230 | 250 | 270 | 290 | 310 | 330 | 350 | 390 | 430 | 470 | 510 | 550 |
| H | 200 | 215 | 225 | 235 | 280 | 290 | 310 | 350 | 415 | 450 | 480 | 550 | 585 | 640 | 720 | 780 | 840 | 990 | 1050 |
| H1 | 88 | 98 | 108 | 118 | 130 | 148 | 172 | 210 | 240 | 264 | 297 | 324 | 351 | 379 | 434 | 491 | 549 | 600 | 655 |
Note: The structure length in this table is in accordance with GB/T 12221, EN558 Ser. 14 standards.
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