What is a spying valve?

The spying valve is the control device of fluids that relies on the principle of constricting the flow path to reduce or close the passage of the material. Most valve design valve design has a highly elastic sleeve or inserting into the valve body, which is gradually narrowed or pressed by air pressure or mechanical intervention. This method of valve closure is not only effective for checking pure fluids, but also works well for sludge with high concentrations of suspended solids. This is due to the fact that the flexible case is capable of creating an effective seal around the captured particles that would otherwise stuck or block the mechanism of other valve types. Punish valves are also particularly suitable for flow control applications due to their large operating range. This is usually a metal gate, a ball or a wedge, which is either gradually falling to close the in the plate or snap closed under pressure in the spring. These valves are very suitable for checking clean flowBut Tin, but they are unable to handle those with high concentrations of suspended solids because of the fact that granules are tending to get stuck metal barriers. In these applications, the spy valve comes to its own as one of the most effective solutions for both clean water suspension and sludge suspensions.

The

spy valves are generally formed of a metal housing equipped with manual or electrically driven mechanical gate or compressed air supply point mounted on the upper part of the housing. It is located inside the housing of a highly flexible sleeve that forms a flow path of fluid through the valve. When the valve is controlled, the sleeve gradually pressed in the center of its length to turn off the fluid flow. This narrowing can be achieved in one of the two ways: mechanically or with compressed air.

6 in both cases a handle or engine turns the machine screw that operates the mechanismwith a valve. This mechanism usually consists of two flat metal bars, one on the upper part of the sleeve and one down. When the lead screw rotates, both rods move closer together, pressing the sleeve closed when it does so.

Air controlled valves have a shape chamber that surrounds the sleeve. Compressed air is introduced into the chamber through a solenoid valve and nipple; As the pressure loads in the chamber, it limits the sleeve until it is completely closed. When the valve needs to be opened, the cycle is reversed and the air is pulled out, allowing the sleeve to return to the full size of the holes. Due to the highly elastic nature of the sleeves and the gradual narrowing on it, the valve valve design is well suitable for control of the tocaplication that require accurate settings in a large range of flow.