1. For with recoil of the relief Industrial Valves disc and seat adjustment ring structure, is to use the seat adjustment circle for adjustment. First, unscrewed the adjusting ring fixed screw, and then from the exposed screw holes into a screwdriver tools, such as a dial to adjust the ring gear, adjust the circle turn right or left. When the adjusting ring has a counterclockwise to the left, the higher position, discharge pressure and back pressure will be reduced. Conversely, when the adjusting ring to the right to make clockwise, its location is reduced, discharge pressure and back pressure will be increased. Each time the adjustment, adjust the ring spinning amplitude shoulds not be too big ( General 2 - rotation 3 teeth) 。 Should be fixed after each adjustment screw, make its department is located in the adjusting ring grooves between the two teeth, can not only prevent the adjusting ring rotation, and not radial pressure adjusting ring. To be on the safe side, before the adjustment ring upon, should lower the inlet pressure relief Industrial Valves properly ( General should be less than 90% of the opening pressure) When, in order to prevent the adjustment valve suddenly open, cause an accident. 2. With upper and lower adjusting ring ( Each have a adjustment in the guide sleeve and valve seat ring) Structure of the relief valve, the adjustment more complicated. The adjusting ring is used to change the flow medium under the disc side reflection after the turning point of view, so as to change the size of the fluid forces, to adjust the seat back pressure. Increased regulation on lap, turning Angle decreases, and the fluid force is less, so that the back pressure increases. Conversely, when reduce the regulation on lap, lower back pressure. , of course, adjusting ring on the change of back pressure at the same time, also affect the discharge pressure, the higher the adjusting ring was increased, the discharge pressure decrease on adjusting ring the discharge pressure decreases, but the influence degree not as obvious as back pressure. The adjustment ring is used to change the disc and adjustment between the size of the channel, so as to change the valve when opening the initial pressure between the disc and the adjusting ring cavity interior accumulation degree of medium size. When elevated seat adjustment ring, the degree of strain accumulation increased, so that with the decrease of the proportion valve open phase quickly to sudden rapid opening. Therefore, elevated seat adjustment circle can make the discharge pressure decreases. Should note that the seat adjustment ring elevated nor too close to the disc. , the sealing surface of leak can lead to valve prematurely suddenly open, but because the medium pressure was not enough to hold the disc in the open position, the disc then closed, so the valve occurred frequency. Seat ring is mainly used to narrowing valve, open phase and adjust the discharge pressure, at the same time also on the back pressure effect.
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