Axial flow check valve
I. Introduction:
The GLH41H axial flow check valve is a new type of check valve that has been continuously improved based on foreign similar products, making its structure more perfect and performance more advanced. The straight-through butterfly check valve has a medium inlet and outlet channel direction perpendicular to the valve seat channel direction; the vertical lift check valve has a medium inlet and outlet channel direction the same as the valve seat channel direction, and its flow resistance is smaller than that of the straight-through type. Due to the streamlined channel inside the valve, its flow resistance is smaller than that of the lift butterfly check valve. It is suitable for large-diameter occasions with low flow rates and infrequent flow changes, but is not suitable for pulsating flow. Its sealing performance is inferior to that of the lift type. Butterfly check valves are divided into three types: single-disc, double-disc, and multi-disc. These three types are mainly classified according to the valve diameter, with the purpose of reducing water hammer when the medium stops flowing or reverses flow.
II. Features:
1. Streamlined flow channel. The medium does not flow around, resulting in small flow resistance of the valve and energy saving.
2. Adopts a special sealing structure. Regardless of the pressure downstream of the valve, the valve can be closed tightly with good sealing performance, overcoming the disadvantage of poor sealing performance of ordinary check valves under low back pressure.
3. Adopts a floating disc structure, which can automatically compensate for errors caused by wear during installation and use, ensuring tight fitting of the sealing surface and improving sealing performance.
4. Short opening and closing stroke, and can automatically reset without impact. The valve can be fully opened at a relatively low flow rate with a short closing time.
5. The valve is not restricted by installation position, and can be installed horizontally, vertically, and at any angle.
6. The valve has two structural lengths: standard series and short series. The short series structural length is especially suitable for devices with small installation positions and compact structures.
III. Installation and Maintenance:
1. Before installation, clean the dirt and dust inside the valve to ensure the use effect.
2. The installation direction of this valve should be consistent with the arrow on the valve body according to the medium flow direction. The flange size follows the JB/T79-94 standard.
3. When conducting a strength test on the pipeline, the valve should be opened.
4. The products of our factory have passed strict tests before leaving the factory. Please do not randomly adjust the components of each part of the product.
5. If the valve is stored for a long time, it should be kept in a dry warehouse and regular rust prevention work should be done.
IV. Main Parameters:
Valve model: GL41W/H/Y, ZLH41W/H/Y, etc.
Valve body material: WCB, 304, 316, CF8, CF8M, CF3, CF3M, and duplex stainless steel, etc.
Size range: DN25-DN350, etc.
Pressure range: 1.0-10.0Mpa, etc.
Temperature resistance range: -60℃ ≤ t ≤ 425℃
Design standard: National Standard GB
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