Media: | Water-Vapour Oil |
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Temperature: | Low Temperature |
Material: | Stainless Steel Carbon Steel Brass |
Connection Form: | Flange Welding |
Structure: | Swing |
Pressure: | High Pressure, Medium Pressure and Low Pressure |
Customization: |
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1. The structure and length are short, and the structural length is only 1/4-1/8 of the traditional flange check valve; | 6, sensitive action, good sealing performance; |
2, small size, light weight, its weight is only the traditional flange check valve 1/4-1/20 | 7, the disc stroke is short, the impact of closing the valve is small; |
3, the valve disc is closed fast, the water hammer pressure is small; | 8, the overall structure, simple and compact, beautiful shape ' |
4, horizontal pipe or vertical pipe can be used, easy to install; | 9, long service life, high stability |
5, flow channel smooth, fluid resistance is small; |
Structural form | Type H76 double-disc swing check valve | Type H44 flanged single disc swing check valve |
Water hammer pressure | Small, short disc stroke, and spring assisted closing, closing valve speed | Large, long disc travel, need longer closing time |
The water hammer pressure of the H76 is only 1/2-1/5 of that of the H44 | ||
Size and weight | The structure is very short in length, small in size and light in weight, which brings great convenience for the installation, handling and storage of pipes, and can save a lot of materials and reduce the cost | The structure length is very long, the volume is stupid and the weight is very heavy |
The structural length of H76 is only 1/4 to 1/6 of that of H44, and the weight absorption energy of H76 is 1/4 to 1/10 of that of H44 | ||
Fluid Resistance | Small, the fluid resistance coefficient ζ is 2.6-0.7, with the increase of the valve diameter, the fluid resistance coefficient decreases | Small, the fluid resistance coefficient ζ, is 1.3-3, but in the low pressure condition, the valve disc can not be fully opened, the fluid resistance is large. The fluid risk increases with the increase of the valve diameter |
Installation | Can be installed horizontally or vertically, light weight, do not have to set a support for the valve | Can be installed horizontally or vertically, large diameter valve weight is heavy, need to set the support |
Opening pressure | Very small, the disc can be fully opened with a very small pressure difference | Larger, the valve disc can be fully opened under a larger pressure difference |
Reliability | The valve is the whole structure, simple and compact, small impact force when the valve is closed, small water hammer pressure, long valve life and high reliability | The huge impact of water hammer pressure when the valve is closed is easy to damage the valve |
Structural form | Type H71 pair lift check valve | Type H41 flanged lift check valve |
Water hammer pressure | Small, short disc stroke, large, disc stroke | |
Size and weight | The structure is very short in length, small in size and light in weight, which brings great convenience for the installation, handling and storage of pipes, and can save a lot of materials and reduce the cost | The structure length is very long, the volume is stupid and the weight is very heavy |
The structural length of the H71 is only 1/4-1/8 of the H41, and the weight absorption energy of the H71 is 1/7-1/20 of the H41 | ||
Fluid resistance | Large, fluid resistance coefficient ζ is 6.4-2.8 | Large, fluid drag coefficient ζ, is 12-6 |
Install | Can be installed horizontally or vertically, light weight, do not have to set a support for the valve | Can only be installed horizontally, the larger diameter of the valve weight is heavy, more difficult to install |
Opening pressure | Very small, the disc can be fully opened with a very small pressure difference | Smaller, the disc weight is larger, and a certain pressure difference is needed to fully open the disc |
Reliability | The valve is the whole structure, simple and compact, small impact force when the valve is closed, small water hammer pressure, long valve life and high reliability | The reliability is high, but the valve is composed of two bodies of the valve body and the valve cover, and there is a potential leakage point |
H72Y-220C H72W-320R | |||||||
Nominal diameter | D | D1 | D | M | L | L1 | Weight (kg) |
10 | 95 | 42 | 10 | M24 * 2 | 60 | 155 | 3.4 |
15 | 105 | 50 | 12 | M33 * 2 | 65 | 158 | 4.5 |
25 | 115 | 62 | 23 | M42 * 2 | 80 | 180 | 7.3 |
32 | 135 | 70 | 29 | M48 * 2 | 90 | 200 | 8.7 |
40 | 165 | 88 | 34 | M64 * 3 | 115 | 255 | 17.0 |
50 | 200 | 116 | 53 | M80 * 3 | 140 | 300 | 30.0 |
65 | 225 | 138 | 60 | M100 * 3 | 160 | 345 | 56.0 |
80 | 260 | 160 | 68 | M125 * 4 | 180 | 410 | 92.0 |
100 | 300 | 195 | 85 | M155 * 4 | 200 | 470 | 109.0 |
125 | 330 | 212 | 120 | M175 * 4 | 220 | 510 | 135.0 |
150 | 400 | 250 | 135 | M215, * 6 | 240 | 570 | 160.0 |
200 | 480 | 320 | 176 | M265 * 6 | 280 | 670 | 180.00 |
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