Goole Valve Technology Co.,Ltd
Address: He_yi Industrial Zone,Oubei Town,Wenzhou City,Zhejiang Province,P.R.China
Tel: 86-577-57781015
E_mail: goole4@goolevalve.com
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Wafer Type Swing Check Valve
Wafer Type Swing Check Valve, also called Dual Plate Wafer Check Valve, is contrast with normal Flange Type Swing Check Valve. It has several advantages.
Wafer Check Valve Application:
Wafer Check Valve is applicable for various pipelines with nominal pressure of PN1.0 MPa~42.0 MPa, Class 150-2500 and nominal diameter of DN15-1200mm, NPS 1/2"~48" and with working temperature -196 ~ 540 Deg C to protect from medium backflowing. 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 Standard and Specification:
1. Design and Manufacture Standard: API 594, API 6D, JB/T 8937
2. Face to face and End to End: API 594, API 6D, DIN3202, JB/T 8937
3. Pressure and Temperature Ratings: ANSI B16.34, DIN 2401, GB/T 9124, HG20604, HG 20625, SH 3406, JB/T 74
4. Inspection and Test: API 598, JB/T 9092
5. Pipe Matching Flange: JB/T 74-90, GB/T 9112-9124, HG 20592~20635, SH 3406, ANSI B16.5, DIN 2543~ 2548, GB/T 13402, API 605, ASME B16.47
Wafer Check Valve Structural Features:
1. Short Structural Length, only 1/4-1/8 of that of traditional flanged swing check valve.
2. Low Volume, light weight, only 1/4-1/20 of those of traditional flanged check valve.
3. Quick valve disc closedown, low water hammer pressure.
4. Applicable for and easily installed for vertical or horizontal pipelines.
5. Smooth flow port and small fluid resistance.
6. Flexible action and good sealing performance.
7. Narrow Valve travel and small closedown impact.
8. Integrated Structure, simple and compact.
9. Long service life and good reliability.
Wafer Type Swing Check Valve and Flange Type Swing Check Valve Contrast:
|
Water Hammer Pressure |
H76 Type Dual Plate Wafer Swing Check Valve |
H44 Flange Type Swing Check Valve |
|
Small Disc, short travel, spring assisted closure which can close the valve fast |
Large Valve Travel, and require a longer closing time |
|
|
Dimensions & Weight |
Very Short structural length, small size and light weight gives a vast convenient for installation, portarage storage and pipeline arrangement of valves,moreover, it can greatly reduce materials and cut construction cost |
A long length of the structure, big size, heavy weight. |
|
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 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 if the valve size increased. |
|
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 need 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 closed 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 |
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