The working principle of the forged steel ball valve is to make the valve unblocked or blocked by rotating the valve stem. Usually full-bore ball valve, 90-degree angle switch, light, small size, can be made into large diameter, reliable sealing, simple structure, easy maintenance, sealing surface and spherical surface are often closed, not easy to be eroded by the medium, in various industries be widely used. Forged steel ball valve classification: low pressure forged steel ball valve, high pressure forged steel ball valve.
The torque of forged steel ball valve is an important parameter of the valve, so many friends are very concerned about the calculation of valve torque; the calculation of torque of forged steel ball valve is: one-half of the square of the valve diameter × 3.14 is the area of the valve plate, and then Multiply by the bearing pressure (ie the valve working pressure) to get the static pressure on the shaft, and multiply it by the friction coefficient (check the table for the friction coefficient of general steel, and the friction coefficient of steel to rubber, in N m, electric Device and pneumatic actuator reference values are based on valve torque.
Forged steel ball valve torque calculation should take into account the friction between the valve plate and the valve seat, the friction between the valve shaft and the packing, and the push of the valve plate under different pressure differences of the medium; because there are too many types of valve plates, valve seats and packings, each of which has Different friction forces, as well as the size of the contact surface, the degree of compression, etc., are generally measured by instruments rather than calculated.