The safety valve discharge and to adjust the pressure back seat

       Emissions and to adjust the pressure back seat

      The valve discharge pressure and reseating pressure, valve must be open to full operation test, highly so, only in the large capacity test devices or to install in the safety valve is protective device ispossible. The adjustment method varies according to valve structure.

      For the structure with recoil plate and the seat adjustment ring, is the use of seat adjustment ring to adjust. Unscrew the adjustment screw ring, stretched like a thin iron tool from the exposed screw,you can toggle adjustment ring on the teeth, so that adjustment ring rotation. When the adjustment ring to the left for counterclockwise rotation, the position of higher, discharge pressure and reseating pressure will be reduced. Conversely, when the adjustment ring to the right for clockwise rotation, the position of lower, discharge pressure and reseating pressure will be higher. Adjust each adjustment,: turning circle range should not be too large (usually the number of teeth can turn). 

     After each adjustment screw on the screws should be fixed so that it ends, the groove is located between the adjusting ring two teeth, both to prevent the adjustment ring rotation, and do not produce radial pressure regulating ring. For security purposes, before the toggle adjustment ring, should be appropriate to reduce the inlet pressure (safety valve opening pressure should be lower than 90% in general), to prevent the adjustment of the valve suddenly opened, causing the accident.

      For having, adjusting ring (guide sleeve and have a seat on theadjustment ring) structure, the adjustment of some of the complex.Seat adjustment ring is used to change the valve between the channel and adjust the size of the circle, so as to change thepressure between the valve and the adjusting ring cavity of the valve to open when the initial size of the degree of accumulation.When elevated seat adjustment ring, the pressure increases the degree of accumulation, so that the phase of the valve opening ratio decreases rapidly to a sudden sharp turn. 

Gear Rack

      Therefore, elevated seat adjustment ring can make the discharge pressure decrease. It should be noted, the seat adjustment ring should not rise too close to the flap valve. So, the leakage at the sealing surface can lead to premature valve suddenly opened, but because of media pressure at this time is not enough to turn the valve flap in the open position,the valve flap then off again, then jump frequency of the valve. Seatadjustment ring: "is mainly used to reduce the proportion valve,open stage and the regulation of discharge pressure, but also have an impact on the back seat pressure.

      On the adjustment ring to change the flow of media in the valve flap side turn after the reflection angle, thus changing the size of fluid forces, in order to adjust the pressure back seat. Increase the adjustment ring, the folding angle decreases, the fluid force is decreased, so that the pressure back seat. Conversely, when reducing the adjustment ring, the back seat pressure drop. Of course, the adjustment ring in the back seat pressure changes at the same time, also affect the discharge pressure, which increases the adjustment ring so that emissions pressure increased, reducing the adjustment ring so that emissions pressure decreased, but its influence as the back seat pressure as obvious.

      Safety valve seal

      Safety valve adjustment is completed, should be sealed to preventthe random change has been adjusted, good condition. When the renovation of the safety valve, should note the adjusting screw andadjusting ring position in the valve before the demolition, to facilitate adjustment after finishing work. Re adjustment should be sealed again.

       Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains,Engineering Chain, sprockets and plate wheels, pulleys,Timing Belt Pulleys, gearboxes, motors, couplings, Chain guides,gears and racks. 

    we can supply: Spur Gears, Bevel Gears, Worm Gears, Helical Gears, Automobile Gears, Agricultural machinery gears, Spiral Bevel Gears, Helical Bevel Gear, Rack.