The main cause of Steam Trap failure is improper design, manufacturing, selection or use. If these faults are not eliminated in time, they will affect the efficiency and life of the valve, and may even fail to provide safety protection. Common faults and solutions are as follows:
(1) Leakage. Under the normal operating pressure of the equipment, leakage exceeding the allowable level occurs between the valve disc and the valve seat sealing surface. The reasons are: there is dirt between the valve disc and the valve seat sealing surface. You can use a lifting wrench to open the valve several times to wash away the dirt and damage the sealing surface. It should be repaired by grinding or turning and then grinding according to the degree of damage; the
Valve Stem is bent or tilted or the lever and fulcrum are deflected, causing the valve core and valve disc to be misaligned. It should be reassembled or replaced; the spring elasticity is reduced or lost. Measures such as replacing the spring and readjusting the opening pressure should be taken.
(2) It will not open when the specified pressure is reached. The reason for this situation is inaccurate pressure setting. The compression amount of the spring or the position of the weight should be readjusted; the valve disc and valve seat are stuck. The Steam Trap should be manually deflated or drained regularly; the lever of the lever Steam Trap is stuck or the weight is moved. The weight should be repositioned so that the lever can move freely.
(3) Opening when the pressure is less than the specified pressure. The main reason is that the constant pressure is inaccurate; the elasticity of the spring decreases due to aging. The adjusting screw should be tightened appropriately or the spring should be replaced.
(4) The pressure continues to rise after exhausting. This is mainly because the selected Steam Trap has a smaller displacement than the safe discharge capacity of the equipment. A suitable Steam Trap should be re-selected; the center line of the valve stem is incorrect or the spring is rusty, so that the valve disc cannot open to the height it should be and should be reassembled. Valve stem or replace the spring; the exhaust pipe is not cut enough, an exhaust pipe that meets the safe discharge area should be used.
(5) The valve disc does not return to its seat after discharge. This is mainly caused by the spring bending the valve stem, the valve disc being installed in an incorrect position or being stuck. Should be reassembled.
(6) The valve flap jumps or vibrates frequently. Mainly due to the spring stiffness being too high. A spring with appropriate stiffness should be used instead; the adjustment ring is improperly adjusted, causing the return pressure to be too high. The position of the adjusting ring should be readjusted; the resistance of the discharge pipe is too large, causing large discharge back pressure. Discharge pipe resistance should be reduced.
