24小时飞艇群the textile mill belongs to a relatively large number of operators and has a large demand for steam and heating. therefore, there is a large demand for gas-fired steam boilers. due to its own characteristics, safety valves are required in steam boilers. guards ensure that accidents do not occur during their use. so what kinds of safety valve types are found in gas oil steam boilers?
so far, there are three types of safety valves commonly found in gas-fired steam boilers. according to the way of the pressure-increasing device on the valve core, it can be divided into static weight type, spring type and lever type.
24小时飞艇群when the steam pressure in the steam boiler acts on the valve core, the towing force is greater than the total weight of the iron plate, the valve core is lifted off the valve seat, and the steam is discharged outward, that is, the safety valve is opened; when the steam pressure acts on the valve core when the supporting force is less than the total weight of the iron plate, the spool down pressure is tightly combined with the valve seat, and the steam stops discharging, that is, the safety valve is closed. in order to prevent the iron plate from flying off because the valve core is lifted too fast, four anti-flying screws are installed.
24小时飞艇群the static pressure regulating valve in the steam boiler adjusts the opening pressure, which is achieved by increasing the total weight of the iron plate by the polyurethane product, so the safety valve must be pressed against the valve core by the equal weight of the iron plate to maintain balance, that is, the spool and seat can be closed tightly.
the spring type safety valve uses the force of the spring to press the valve core on the valve seat. the pressure of the spring is adjusted by adjusting the screw. when the steam pressure is greater than the spring pressure, the spring is compressed, causing the spool to be lifted off the valve seat and the steam is drained outwards, at which point the safety valve opens.
some gas oil steam boilers are equipped with a lever type safety valve, which is simple in structure, convenient in adjustment and reliable in operation, mainly because it uses the weight of the weight to press the valve core on the valve seat by the torque of the lever; the amount of pressure acting on the spool is adjusted by moving the weight.
24小时飞艇群when the steam pressure exerts on the valve core is greater than the pressure of the weight passing the lever, the valve core is jacked up, the steam is discharged outward, that is, the safety valve is opened; when the steam acts on the valve core, the towing force is less than the weight when the pressure is applied, the spool down pressure is re-tightened with the valve seat, and the steam stops discharging, that is, the safety valve is closed. in order to prevent the weight from moving freely, positioning with a fixed screw clamp and manually lifting the lever can be used to check the sensitivity of the spool, and can also be used as a manual emergency pressure relief.