1) The adjustment of the opening pressure

1) relief valve before delivery, should by Taiwan to adjust its opening pressure to the user's setting. If users spring pressure level, the general should be adjusted by the lower limit of pressure level of the factory.

(2) the user before install the valve to be protected devices or before installing, adjustment must be installed in the scene, to ensure that the relief valve setting pressure value meets the requirements.

(3) in a nameplate indicating the spring within the scope of work stress level, by rotating adjustment screw to change the spring compression, the opening pressure can be regulated.

(4) on the adjusting screw before, should make the valve inlet pressure is reduced to below 90%, opening pressure to prevent rotation adjustment screw when the disc is driven to rotate, so that damage the sealing surface.

5) to guarantee the accuracy of the opening pressure value, should be adjusted when the medium conditions, such as the type of medium, and the liquid temperature as close as possible to the actual operating conditions. Medium type change, especially when the accumulated state of the medium is not at the same time, For example, from a liquid into a gas phase) , the opening pressure often change. Work at higher temperatures, the opening pressure generally reduced. Reason at room temperature adjustment and used in high temperature, the temperature of the set pressure value should be slightly higher than the requirements of opening pressure values. High to what extent and valves are relationship, structure and material selection should be according to manufacturer's instructions.

6 conventional fixed additional back pressure relief valve used in occasions, when opening pressure adjustment after the inspection, The back pressure to atmospheric pressure) , the setting value shall be the requirements of opening pressure value minus the superimposed back pressure.

bellows valve to adjust the safety technical operation process

( 2) The adjustment of the discharge pressure and back pressure

1) adjust the discharge pressure and back pressure valve, the valve must be conducted to fully open the height of the test, therefore, only in the large capacity test device or on the relief valve installed to the protected equipment before possible. The adjustment methods varies in accordance with the valve structure.

(2) for the recoil disc and seat belt to adjust the structure of ring, is adjusted using the seat adjustment ring. Unscrewed the adjusting ring fixed screw, from revealing the screw hole and a thin iron tools, such as can a dial to adjust the ring gear, make adjustment 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. Every time adjustment, adjust: circle the extent of rotational shoulds not be too big ( General rotation number of 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 valve properly ( General should be less than 90% of the opening pressure) When, in order to prevent the adjustment valve suddenly open, cause an accident.

(3) with upper and lower adjusting ring ( Each have a adjustment in the guide sleeve and Industrial Valves seat ring) The structure and its adjustment a bit more complicated. Seat 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 stress in the disc and adjust the size of the ring cavity between indoor accumulation degree. 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 adjustment: the ring is mainly used to reduce proportion valve, open phase and adjust the discharge pressure, at the same time also on the back pressure effect.

( 3) Seal

safety valve adjustment, should be sealed, in order to prevent the casually change has been adjusted. When the relief valve to repair, should write down before remove valve adjusting screw, and adjust the position of circle, in order to facilitate adjustment after finishing work. Seal should be again after reset.

keywords: bellows valve adjustment technical operation process
Shenzhen Mech Valve Trading Co., Ltd. has famous reputation in worldwide.
Our knowledgeable loss prevention experts can help commercial customers reduce losses in flanged gate valve.
flow control valve offers the opportunity for improved manufacturing and product’s data collection, as well as direct feedback, enabling companies to better understand their consumer base and respond accordingly.
Millions of women across the world suffer from os gate valve. Are you also one of them who suffer from acne problem? now you will see some hope in Shenzhen Mech Valve Trading Co., Ltd.'s offer of . Click Mech Valve to know more.