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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.

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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

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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