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Wafer check valve is applicable for various pipelines with nominal pressure of PN1.0MPa~42.0MPa. Class150.2500 and nominal diameter of DN15~ 1200mm,NPS1/2-48 and working temperature of - 196~540'c to be used for protecting from medium back flowing. The different materials selection can apply to the medium involving water, steam, oils, nitric acid, acetic acid, strong oxidizing medium and urea etc..
Wafer check valve is applicable for various pipelines with nominal pressure of PN1.0MPa~42.0MPa. Class150.2500 and nominal diameter of DN15~ 1200mm,NPS1/2-48 and working temperature of - 196~540'c to be used for protecting from medium back flowing. The different materials selection can apply to the medium involving water, steam, oils, nitric acid, acetic acid, strong oxidizing medium and urea etc..
1. Design and manufacture:APl594,API6D,JB/T8937:
2. Face to face and end and end:AP1594.API6D,DIN3202.JB/T8937.
3. Pressure-temperature ratings ASME B16.34,DIN2401.GB/T12224;
4. Inspection and test:APl598、GB/T26480;
Pipe flange:JB/T74-90,GB/T9113,HG20592-20635,SH3406,ASMEB16.5,DIN2543-2548,GB/T13402,AP1605,ASME B16.47。
1. Design and manufacture:APl594,API6D,JB/T8937:
2. Face to face and end and end:AP1594.API6D,DIN3202.JB/T8937.
3. Pressure-temperature ratings ASME B16.34,DIN2401.GB/T12224;
4. Inspection and test:APl598、GB/T26480;
Pipe flange:JB/T74-90,GB/T9113,HG20592-20635,SH3406,ASMEB16.5,DIN2543-2548,GB/T13402,AP1605,ASME B16.47。
1. Short structural length, only 1/4 ~ 1/8 of that of traditional flanged check valve;
2. Low volume, light weight, only 1/4~1/20 of those of traditional flanged check valve,
3.Quick valve disc close down, low water hammer pressure;
4.Applicable for and easily installed for vertical or horizontal pipelines,
5.Smooth flow passway and small fluid resistance;
6.Flexible action and good sealing performance:
7.Narrow valve travel and small close down impact;
8.Integrated structure,simple and compact, in beautiful shape;
9.Long service life and good reliability.
1. Short structural length, only 1/4 ~ 1/8 of that of traditional flanged check valve;
2. Low volume, light weight, only 1/4~1/20 of those of traditional flanged check valve,
3.Quick valve disc close down, low water hammer pressure;
4.Applicable for and easily installed for vertical or horizontal pipelines,
5.Smooth flow passway and small fluid resistance;
6.Flexible action and good sealing performance:
7.Narrow valve travel and small close down impact;
8.Integrated structure,simple and compact, in beautiful shape;
9.Long service life and good reliability.
Structure | H76-type wafer double disc swing check valwe | H44 Flange Swing Check Valve univalve |
Water hammer pressure | Small disc a short trip, and a spring assisted closure, close the valve fast | Large valve travel, and require a longer closing time |
H76 Type H44-type water hammer pressure is only 1/2 to1/5 | ||
Dimensions & Weight | Very short structural length, low volume and light mass gives a vast convenients for installation, porterage. Storage and pipeline arrangement of valves, moreover, it can greatly reduce materials and cut construction cost. | A long length of the structure, volume stupid big,heavy weight |
H76 H44-type length of the structure type is only 1/4 ~ 1/6, H76 Type H44 Type weighs only 1/4 to 1/10 | ||
Fluid resistance | Small, fluid resistance coefficient ￡ of 2.6 to 0.7, with the valve diameter increases, the fluid resistance coefficient decreases | low flow resistance coefficient E is 1.3.3, but under the condition of low pressure,the valve disc can not be completely opened,high fluid resistance. The resistance will be increased as the augmentation of valve size. |
Installation | Can be installed in horizontal or vertical installation,light weight. do not have to set the bearings for the valve | Can be installed in horizontal or vertical installation, the weight of heavy large diameter valves, bearings needs to be set |
Opening pressure | Small valve under pressure in a small can fully open | Larger in larger valve can be fully opened under pressure |
Reliability | The valve body is of integrated structure, simple and compact small close down impact,low water hammer pressure, long service life and good reliability | The valve is closed and the huge impact of water hammer pressure is easy to damage the valve |
Structure | H76-type wafer double disc swing check valwe | H44 Flange Swing Check Valve univalve |
Water hammer pressure | Small disc a short trip, and a spring assisted closure, close the valve fast | Large valve travel, and require a longer closing time |
H76 Type H44-type water hammer pressure is only 1/2 to1/5 | ||
Dimensions & Weight | Very short structural length, low volume and light mass gives a vast convenients for installation, porterage. Storage and pipeline arrangement of valves, moreover, it can greatly reduce materials and cut construction cost. | A long length of the structure, volume stupid big,heavy weight |
H76 H44-type length of the structure type is only 1/4 ~ 1/6, H76 Type H44 Type weighs only 1/4 to 1/10 | ||
Fluid resistance | Small, fluid resistance coefficient ￡ of 2.6 to 0.7, with the valve diameter increases, the fluid resistance coefficient decreases | low flow resistance coefficient E is 1.3.3, but under the condition of low pressure,the valve disc can not be completely opened,high fluid resistance. The resistance will be increased as the augmentation of valve size. |
Installation | Can be installed in horizontal or vertical installation,light weight. do not have to set the bearings for the valve | Can be installed in horizontal or vertical installation, the weight of heavy large diameter valves, bearings needs to be set |
Opening pressure | Small valve under pressure in a small can fully open | Larger in larger valve can be fully opened under pressure |
Reliability | The valve body is of integrated structure, simple and compact small close down impact,low water hammer pressure, long service life and good reliability | The valve is closed and the huge impact of water hammer pressure is easy to damage the valve |
