Instrument needle valve structure principle of

Key Instrument needle valve seal structure is due to the way the valve drive using triggered, if the valve actuator seal structure to improve the way you can solve the leakage problem and lead to Double ferrule fitting the loss of technical issues valve actuator functions. Mechanical seal is a dynamic seal, widely used in the chemical industry. Instrument needle valve structure is simple, small size, resistance to fluid flow is also small, problems are open or closed too quickly, it will occur in the pipeline water hammer (water flow rate in the pipe when the pressure Instrument valve manifolds is reduced suddenly change). Instrument needle valve and thus should not be taken on the backbone tube valve can be used in the dry end of the branch pipe, or for wash-use, flushing sewage good consequences.

Conditions Instrument needle valve inspection

Instrument needle valve is a simulation test in the normal state. This state should be able to cover all water department environment. Dynamic test valve executive function Another very important point is that the test voltage, what kind of voltage the most appropriate? High pressure ball valve Smart meter in every one has a same function, that is, when the battery voltage is below the set value, the microcontroller will command the valve closing function is activated, Valve manifolds when the battery voltage is the lowest in the smart meter voltage Instrument needle valve, also that is, the final action is the lowest setting off valve in the battery voltage. The task of the truth is by reversing valve to the valve dredge or occlusion. Instrument needle valve switch is lightweight, small size, can be made very large caliber, reliable sealing, simple structure, Instrument needle valves convenient maintenance, regular spherical surface and seal in the closed condition, can not easily be eroded media, in all sectors lost universal use.

Needle valve structure analysis

Needle valve is solid move after pressure does not occur. With a floating ball valve are firmly seat after by media pressure, move the seat occurs, the seal is pressed onto the ball, Needle valve in order to protect the seal. Weekdays with the ball, the lower shaft with bearings, manipulating small torque, useful in high-pressure valve with large diameter. Needle valve characteristic is horizontal, and the flow is upward mobility, so the valve is closed the water pressure on the valve play a significant role in the film is, the higher the pressure the better sealing performance. Needle valve when the valve is working as a plane rotation, need to overcome the friction coefficient between the valves, Instrument needle valve and the impact it's not as big hydraulic valve. But to overcome the friction in the water under the lamination pressure. Was friction between the laminations through practical experiment, several Corfu little force increases.