Ball 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
HQ41X ball check valve using rubber-covered ball for disc, under the action of the medium, can be made in the body of the integral slide rolling up and down, so as to open or close the valve. The silencer type is closed, does not produce water hammer, and has good sealing performance. The valve body adopts the whole water flow channel, the flow is large, the resistance is small, and the head loss is 50% smaller than the swing type. Horizontal or vertical installation can be used for cold water, hot water, industrial and domestic water pipe network system, more suitable for submersible sewage pump, medium temperature is 0~80 ℃.
◆Working principle
When the medium flows in the specified direction, the spherical valve disc is opened by the force of the medium; when the medium flows in reverse flow, the spherical valve disc is quickly closed by itself, so as to prevent the medium from flowing in reverse flow.
◆Technical parameters
| Nominal diameter | DN50~DN250 |
| Maximum working pressure | PN16 |
| Working temperature | 0 ℃ ~ 80 ℃ |
| liquid medium | Water |
| Connection standard | GB/T 17241.6 |
| Test Standard | GB/T 13927 |
◆ Material of main parts
| Part Name | Material |
| Valve body | Epoxy spraying on the surface of ductile iron |
| Bonnet | Epoxy spraying on the surface of ductile iron |
| Spherical Disc | Cast aluminum or cast iron encapsulated EPDM |
◆ Main outline connection dimension
| DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 |
| L | 180 | 200 | 260 | 300 | 350 | 400 | 500 | 600 |
| H | 185 | 210 | 245 | 280 | 335 | 400 | 495 | 600 |
| D | 165 | 185 | 200 | 220 | 250 | 285 | 340 | 405 |
| N-Fd | 4-19 | 4-19 | 8-19 | 8-19 | 8-19 | 8-23 | 12-23 | 12-28 |
Note: The flange size in the table is in accordance with GB/T17241.6 standard.
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