J541h and j541y bevel gear stop valves produced and sold by Wo valve (Shanghai) Co., Ltd. are widely used in municipal construction, farmland water conservancy, thermal power generation, petrochemical industry, metallurgy and mining, fire protection and environmental protection, food, shipping, medicine, light textile and other fields.
Introduction to j541h / y national standard stop valve
The J41H / y national standard stop valve produced and sold by Wo valve (Shanghai) Co., Ltd. is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from below the valve disc, the resistance to be overcome by the operating force is the friction between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem should be larger, otherwise the failure of valve stem jacking will occur. In recent years, after the emergence of self sealing valve, the medium flow direction of flange stop valve changes from above the valve disc to enter the valve chamber. At this time, under the action of medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of valve rod can be reduced accordingly. At the same time, under the action of medium, this form of stainless steel pneumatic valve is also more tight.
Pressure test
| Nominal pressure | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| strength test | 2.4 | 3.8 | 6.0 | 9.6 | 15.0 | 24.0 |
| Water seal test | 1.8 | 2.8 | 4.4 | 7.4 | 11.0 | 18.0 |
| Upper seal test | 1.8 | 2.8 | 4.4 | 7.04 | 11.0 | 18.0 |
| Airtight seal test | 0.4-0.7 | |||||
