The stainless steel sleeve valve, also known as the extraction valve, is generally used in the sedimentation tank to discharge sludge outside the tank. Because the structure is an inner and outer telescopic sleeve, it can also be used to adjust the water level in the water distribution well or the water discharge well, for example, the second sedimentation tank is out of the mud, the air floats out of the water, etc., and is generally made of carbon steel or stainless steel.
The characteristics of the stainless steel sleeve valve are as follows:
Good stability. Since the valve plug is provided with a balance hole, the imbalance force of the medium acting on the valve plug can be reduced, and sufficient valve plug guide is added, so that the valve core is not easily oscillated; the throttle window provided by the stainless steel sleeve valve is opened. There are two kinds of windows and small holes (jet type), which have the function of reducing noise and reducing resonance. Further improvement, it can become a special low-noise valve; double sealing mechanism, large leakage, large allowable pressure difference; easy maintenance; valve plug self-guided, complicated flow path, more likely to block; too bulky.
Stainless steel sleeve valves are widely used in petroleum, chemical, metallurgical, light industry and other industrial sectors as well as urban heating and supply systems. Its input is the DC current signal sent by the regulator. After being amplified by the servo amplifier, the actuator is driven to generate the axial thrust, which drives the regulating valve to act to cause the change of the medium flow to achieve various thermal parameters in the system. purpose
The stainless steel sleeve valve not only has simple structure and good sealing performance, but also has small volume, light weight, less material consumption, small installation size, especially small driving torque, simple operation and easy opening and closing. In addition, stainless steel sleeve valves can be used in a variety of materials depending on the nature of the media to meet the requirements of various media.
First, stainless steel sleeve valve features:
1. The opening degree is adjustable, which can achieve different displacements of the same specification.
2, with self-guided, small operating force.
3, good sealing performance, economical use.
4. If the electric hoist is equipped, it can realize automatic control.
Second, the installation notes:
1. The pipe mating flange must be matched with the flange on the valve during installation (flange requirements are 6 kg or 10 kg pressure according to national standards)
2. The hoist and the valve are perpendicular to the installation when the installation is performed (the deviation should be less than 3%)
The role of stainless steel sleeve valves in process control is well known. In many control processes, the regulating valve is required to be in a certain position during the fault to protect the process from accidents. This requires the design of the regulating valve. Fault-safe three-break (off gas, power off, break signal) protection measures.
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