Check valve (check valve) is also called or a one-way valve, the open-close part is depend on medium flow and power on or off, its role is to prevent the backflow medium pipeline.
Check valve according to the structure can be divided into the lift check valve, swing check valve and butterfly valve. Lift check valve can be divided into vertical and horizontal two again; Swing check valves can be divided into single type, more than double disc type and disc type three; Butterfly check valve for straight-through. The above several kinds of check valve in the connection form can be divided into the thread connection, flange connection, the wafer and welding, etc.
Check the installation of the roof should be paid attention to the following things:
1, do not make the check valve in the line to bear weight, large check valve shall be independent, to make it not influenced by the pressure of pipeline system to produce.
2, when installation, pay attention to the medium flow direction should be consistent with the body the direction of the arrow.
3, vertical elevating disc check valve should be installed in vertical pipe runs.
4, elevating disc check valve should be installed in horizontal pipe runs.
Products include:
1. Lift check valve: made of cast iron, cast steel, stainless steel, chrome molybdenum steel; Pressure: 1.0-16 mpa; Connections are threaded connection, flange connection, welding; Nominal menstruation: DN25-1200
Such as: cast steel lift check valve H41H - 16 - c; Stainless steel lift check valve H41W - 16 p; Bottom valve pump H42W - 10 / H42H - 16 c/H42W - 16 p
Silencing check HC41T - 10; Mute type check valve H42T - 10; Ball check valves HQ41X - 10; Vertical fluorine-butterfly check H42F - 10; Lift check valve lining fluorine H41F46-16 - c; Silencing check valve to the clamp H71T - 10; Welded check H61H/Y - 160
2. Swing check valve: made of cast iron, cast steel, stainless steel, chrome molybdenum steel; Pressure: 1.0-16 mpa; Connections are threaded connection, flange connection, welding; Nominal menstruation: DN25-1200
Such as: cast steel swing check valve H44H - 16 - c; Stainless steel swing check valve H44W - 16 p; Cast iron swing check valve H44T - 10; Rubber disc swing check valve HC44X - 10; Threaded connections swing check valve H14H - 16 - c/H14W - 16 p/H14T - 10, H74W/F - 16 p; Plastic swing check valve H44F - 10 s/H44F - 10 f
3. The butterfly check valve: made of cast iron, cast steel, stainless steel, chrome molybdenum steel; Pressure: 1.0-16 mpa; Connections are threaded connection, flange connection, welding; Nominal menstruation: DN25-1200
Such as: double disc type butterfly check valve H76H - 16 c/H76W - 16 p; Micro resistance slow close check valve HH47H - 16 - c/HH48H - 16 c/HH49H - 16C
