Q: relief valve pressure debugging and operating rules a: relief valve opening pressure, discharge pressure and back pressure of the debugging a debug (1), the relief valve opening pressure relief valve before delivery, should by testing its opening pressure to the user requirements of setting value. Unscrewed the adjusting ring fixed screw, from revealing the screw hole and a thin iron what tools, can be a dial to adjust the ring gear, the adjusting ring turn right or left. In contrast, when the adjusting ring to the right to make clockwise, reduce its position, discharge pressure and back pressure will be increased. , 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 reduction on adjusting ring the discharge pressure is reduced, but its influence is not as good as superficial back pressure like that. Seat adjustment ring is used to change the disc and adjust the volume of circle between channels, so the first time change valve opening pressure between the disc and the adjusting ring cavity interior accumulation degree of volume. It should be noted that the seat adjustment ring also can rise to not for himself is very close to the disc. For safety to achieve a goal, before the adjustment ring upon, should make the relief valve inlet pressure reducing (right General should be below the opening pressure of 90. One hundred percent) In order to avoid valve suddenly open when debugging, lead to accidents. Increased regulation on lap, turning corners, less fluid energy utility, thus increase the back pressure. (5) to ensure right opening pressure value, should make debugging when media conditions, such as media category, such as temperature as possible close to the actual operating conditions. 6 common fixed attached with back pressure relief valve used in occasions, when after inspection experience debugging opening pressure ( The back pressure to atmospheric pressure) , the setting value shall be the requirements of opening pressure value minus the supplementary with back pressure. Medium of the adjusting ring is used to change flow under the disc side reflection after the turning point of view, thus changes the volume of fluid energy utility, as to adjust the seat back pressure. Often fixed screws should be turned on after debugging, make its department is located in the adjusting ring grooves between the two teeth, can not only avoid adjustment ring rotation, and error adjustment ring initiation radial pressure. Mainly use the seat adjustment: the circle because smaller proportion valve, open phase and adjust the discharge pressure, at the same time also on the back pressure effect. (2) to use in the relief valve installation to be trying to take care of facilities before or before installing, be sure to present the new installation debugging, to determine the guard of the valve set pressure value is required. If spring office stress level by the user, the ordinary pressure should be according to the lower limit of the debugging of the factory. Second, the relief valve discharge pressure and back pressure of the debugging to debug the valve discharge pressure and back pressure, be sure to rev. The height of the movement of the Industrial Valves to the whole paper try, because of this, only in the large volume try device or on the relief valve installation to be trying to take care of facilities after this is possible. (3) to have the upper and lower adjusting ring ( Each have a adjustment in the guide sleeve and valve seat ring) The structure of the debugging is a little complex. 。 So debugging and when used in high temperature, at room temperature under normal temperature setting pressure value should be slightly higher than the requirement of the opening pressure values. Because of this, increases the seat adjustment ring can make reduce the discharge pressure. The new should seal again after debugging. High to what degree and the valve structure and material selection are all related, should be based on the interpretation of the manufactory understand. When the enforcement of safety valve renovated, in front of the remove valve Marine valve should note down debugging screw and adjust the position of circle, with easy to debug office after finishing. Every time when debugging, adjust: the amplitude of the circle of appropriate is too large, Regular rotation number of teeth) 。 Office at higher temperatures, the opening pressure of ordinary corner. (3) in the metal sign indicate the office of the spring pressure level range, after turning adjustment screw change amount of spring compression, can the opening pressure adjustment. Change in media category, especially when media accumulation state is not the same ( For example, from a liquid into a gas phase) , the opening pressure often change. In contrast, when reduce the adjustment ring, back pressure relief. When elevated seat adjustment ring, the degree of stress accumulation increases, thus make rapidly with the decrease of the proportion valve opening stage to suddenly open very fast. Three, the seal of safety valve relief valve end debug, shall be sealed up, in order to avoid change has been debugged easily. When the adjusting ring has a counterclockwise to the left, the higher position, discharge pressure and back pressure will be reduced somewhat. The debugging method in accordance with the safety valve structure is different and different. (4) turn adjusting screw in screw before, should make the valve inlet pressure to reduce to 90 opening pressure to less than one hundred percent, in order to avoid spin turn adjustment screw when the disc is help and rotate, causing damage to tightly closed surface. (2) for the recoil disc and seat belt to adjust the structure of ring, seat adjustment ring is used to adjust. That way, the tightly closed surface of leak could cause valve prematurely suddenly open, but as the medium pressure is still not fully can keep the disc in the open position, the disc and then shut down, so the Industrial Valves occurred frequency.
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