TECHNICAL SUPPORT
Electric Ball Valve
Electric ball valve is composed of electric actuator and ball valve.It is a kind of pipeline pressure element for industrial automation process control and is usually used for remote opening and closing (connecting and cutting off medium) control of pipeline medium.
Electric ball valve according to the ball valve ball type, divided into floating ball valve, fixed ball valve and elastic ball valve.
Floating ball valve: the ball valve is floating, under the action of medium pressure, the ball can produce a certain displacement and tight pressure on the sealing surface of the outlet end, to ensure that the outlet end is sealed.The structure of the floating ball ball valve is simple, good sealing, but the ball bears the load of the working medium all passed to the outlet sealing ring, so it should be considered whether the sealing ring material can withstand the working load of the ball medium, in the high pressure impact, the ball may have deviation.This design is commonly used for low and medium pressure ball valves.
Fixed ball valve: the ball valve ball is fixed, pressure does not produce movement.Fixed ball ball valve with floating seat, by the medium pressure, the seat seat to produce a movement, so that the sealing ring pressed on the ball, to ensure that the seal.Bearings are usually mounted on the upper and lower shafts of the ball, with small operating torque, suitable for high pressure and large diameter valves.In order to reduce the ball valve operating torque and increase the reliability of the seal, lubricating oil, to form a layer of oil film, that is, to enhance the sealing, and reduce the operating torque, more suitable for high pressure large diameter ball valve.
Resilient ball valve: the ball valve ball is elastic.Ball and seat sealing ring are made of metal materials, the sealing specific pressure is very big, the pressure of the medium itself can not meet the requirements of sealing, must apply external force.This valve is suitable for high temperature and pressure medium.The elastic sphere is obtained by opening an elastic groove at the lower end of the inner wall of the sphere.When closing the channel, inflate the ball with the wedge head of the stem and press against the seat to seal.Loosen the wedge head before turning the ball, and the ball will return to its original shape, making a small gap between the ball and the seat, which can reduce the friction and operating torque on the sealing surface.
Model representation of electric ball valve:
Ball valve additional code: V means that the spool with v-type structure, D means low temperature, B means insulation, P means eccentric structure, U and S and DY means more than jacket
Ball valve name code: Q stands for ball valve;
Ball valve drive code: 2 means electrohydraulic, 3 means turbine, 6 means pneumatic, 7 means hydraulic, 9 means electric, manual no code;
Connection code: 1 for internal thread, 4 for flange, 6 for welding, 7 for clamp;
Structural type code: floating type: 1 for straight flow channel, 2 for y-type tee, 4 for l-type tee, 5 for t-type tee;Fixed type: 0 means hemisphere straight flow, 6 means four-way flow, 7 means straight flow to, 8 means l-type tee, 9 means y-type tee;
Sealing material code: B babbit alloy, F fluorine rubber, F46 fluorine, H rust steel, J rubber, M monel alloy, N nylon plastic, monel P, Y hard alloy, W valve body direct processing;
Pressure rating code: 16 means pressure of 16 kg (1.6Mpa) up to 64Mpa;150LB stands for American standard pound class pressure, and the maximum pressure grade
can reach 5K; stands for daily class pressure, and the maximum pressure is 63K
= 1.6 MPA / 2500 lb, 150 lb, 300 lb = 2.5 4.0 MPA / = 6.4 MPA / 600 lb, 400 lb = 10 MPA);
Material code of valve body: A titanium and titanium alloy, C carbon steel, I chrome molybdenum steel, p18-8 series stainless steel, RMo2Ti stainless steel, S plastic.
