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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.

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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

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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