Butterfly 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
HH47H, H47XF, HDH47X type slow closing check valve, mainly used for industrial water supply, sewage treatment plant pump outlet, to prevent the medium in the pipe network countercurrent. Automatically eliminate destructive water hammer, so as to ensure that the pump and pipeline are not damaged. The valve is mainly composed of a threshold body, a valve flap, a buffer device and a micro-regulating valve. The product has the characteristics of novel structure, small size, low fluid resistance, balanced operation, reliable sealing, wear resistance, and good buffer performance. It is an ideal product for industrial water and urban sewage.
◆Technical parameters
Nominal pressure: 1.0 ~ 2.5MPa
Applicable medium: water, oil, sea water, sewage
Flange standard: GB/T17241.6
Nominal diameter: 40~1400mm
Applicable temperature: 0~80 ℃ (if necessary, up to 200 ℃)
Test standard: GB/T 13927
◆ Typical installation diagram
◆ Material of main parts
| Part Name | Valve body | Butterfly plate | Sealing ring | Stem | Packing |
| Material | Cast iron, ductile iron | Cast iron, ductile iron | Nitrile oil-resistant rubber, neoprene | Stainless Steel | Teflon |
◆ Main outline connection dimension
| DN | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | 1400 |
| L | 230 | 250 | 270 | 290 | 310 | 330 | 350 | 390 | 430 | 470 | 510 | 550 | 630 | 710 |
| H | 550 | 630 | 690 | 780 | 860 | 910 | 980 | 1070 | 1220 | 1320 | 1430 | 1550 | 1800 | 1980 |
| B1 | 540 | 600 | 650 | 710 | 770 | 830 | 900 | 1090 | 1200 | 1320 | 1420 | 1550 | 1780 | 2000 |
Note: The structure length in this table is in accordance with GB/T 12221, EN558 Ser. 14 standards.
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