Category: Water Meter Spare Part

Jan 24 2015

How to choose a water meter fittings became an important factor

Water meter has become one important tool for life saving. First of all both general mechanical water meters and the smart meter, quality is one of the most important choices of meter, good quality depends on what? Water meter fittings is made, of course, how to select a water meter fittings became an important factor.

How to choose a water meter fittings meter structure first start, general mechanical water meters can be divided into: movement, pressure, connector fittings, table cover, table glass shell in five parts Movement is drinking water directly impact of parts, so movement. of material must to selection by have live flow impact of material; and pressure cover up with dial fixed of role, must to select easily rust of material case rust pollution table glass and dial; table glass also can not using general household of glass, table glass should easily broken, resistance damage, anti-miscellaneous smashed ,, protection dial and measurement of intact; joints fittings General are used copper mass of but different of meter models must have meet GB of standard; table shell of material has many species, Steel should be used without secondary pollution Stainless steel water standards-compliant, and most manufacturers are now using copper should conform to the national standard;. the smart meter is the electronic component parts more than the General mechanical water meters, electronic component parts should be quality, accurate measurement, and most of all flexible intelligent water meter valves must be closed, the best use of ball valves.

Guarantees the quality of the water meter fittings water security is also very important. Water meter every household tap water flows through the direct channel, meter movements, watch cases, joint pipe fittings should be adopted in accordance with the national provisions of the safe drinking water safe and sanitary materials. So smart meter, how to select a water meter fittings according to the quality and safety aspects are marvellous.

source:http://www.asmeter.com/

Jun 17 2014

Water Meter check Non-return Valve characteristics, working principle, methods of operation and maintenance

Check valve also known as check valve, check valve, a one-way valve or check valve, and its role is to ensure the directional flow in the pipeline without backflow function. The bottom valve pump suction pipe valve category also belong. Check valves are automatic valves, pressure 1.6~25MPa/Class150-2500/2.0-42.0MPa working temperature is -29~+550 ℃, materials are: steel WCB, HT250, HT200. Cast iron, QT350, QT450, alloy steel WC6, WC9, CN7M stainless steel CF8 (M), CF3 (M). A105 forging steel, F304 (L), F316L piping. Various conditions of the petroleum, chemical, pharmaceutical, chemical, electric power industry and so on, it is used to water, oil, steam, acid medium. Is the control of the medium in the pipeline one-way flow valve, used to prevent the media back in the pipeline.

Water Meter check Non-return Valve

Classification:

A: check valve according to its structure, can be divided into the lift check valve, swing check valve and Water Meter check Non-return Valve

1 lift check valve can be divided into two types of vertical and horizontal.

2 swing check valve is divided into single type, double valve and valve type three.

3 butterfly valve for the straight through type.

The above non-return valve can be divided into connection, flange connection, welding connection and connected to the clip four is a thread in the connection form.

Opening and closing pieces by medium flow and the forces to open or close, backflow valve to prevent the media called the check valve. Check valves are automatic valves, mainly for one-way flow of media channels, only allowing media to flow in one direction, to prevent accidents.

Structure:

Check valve (Check Valve): according to its structure, can be divided into the lift check valve, swing check valve and butterfly valve three. Lift check valve can be divided into vertical and straight through two. Swing check valve is divided into a single type, double valve and valve type three. Butterfly valve for the butterfly valve, butterfly type single, double above non-return valve can be divided into connection, flange connection, welding and connect to the clip on four kinds of thread in the connection form.

The installation should pay attention to the following matters:

1, in the pipeline not to bear the weight of a large check valve, non-return valve should be independent of support, so that is not affected by the influence of pressure piping system.

2, the installation media attention to the direction of flow should be consistent with the body of the arrow.

3, the vertical lift check valve should be installed in a vertical pipe.

4, the level of valve lift check valve should be installed in horizontal pipelines.

Working principle.

Water Meter Mechanism is to rely on the flow of the medium itself automatically open and close the valve, backflow valve to prevent the media, also known as check valve, Dan Xiangfa, the reflux valve and the back pressure valve. Check valve is an automatic valve, the main role is to prevent the media back, to prevent reverse pump and drive motor, and discharge the container medium. Check valve can also be used for the pipe to the pressure may rise to the auxiliary system supplies more than the system pressure. Check valve can be divided into swing check valve (according to the focus of rotation) and lift check valves (along the axis of movement).

Check valve is the role of this type of valve is only allowing media to flow in one direction, and stop the flow in the opposite direction. Usually the valve is automatically work, the fluid pressure in a direction of flow, the valve flap to open; the opposite direction of fluid flow, the fluid pressure and the self valve coincidence role in the valve seat, thereby cutting off flow.

Applicable occasions:

Butterfly double disc check valve is suitable for high-rise building water supply pipe network, a certain chemical corrosive media pipeline, installation space limited network, also applies to the sewage pipe network.

Lift silent check valve suitable for network of water supply and drainage engineering high quality requirements; the pipe pressure requirement is relatively high (PN2.5Mpa); can be installed in the pump outlet is economical and practical, water hammer check valve.

Lifting type silencing check valve is used in water supply and drainage system of high-rise building, pipe network, can be installed in the pump outlet, slightly modifying the structure, can be used as the suction end of the valve, but not suitable for the sewage pipe network.

Horizontal check valve suitable for diving, drainage, sewage pump, is particularly applicable to the sewage and sludge system.

Swing type rubber check valve is suitable for living water supply network; but not for sediment sewage

Swing check valve is suitable for the single water supply system, petroleum, chemical, metallurgical and other industrial sectors for the confined space installation is most applicable.

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