VALVES PRODUCT NEWS

Basic composition of control system (1) Manual control Take the liquid level control shown in Figure 1-1 as an example to illustrate the related concepts of manual control. The liquid level is a variable that the process needs to control. The operator adjusts the opening of the discharge valve according to the level of the liquid to keep the liquid level at the height required by the process. The manual

(1) Classification of control valves The adjustment mechanism of the control valve is a device that converts the change in the output displacement of the actuator into a change in the flow area between the valve core and the valve seat of the control valve. Usually, the regulating mechanism is called a valve. According to the nominal diameter, it can be divided into small diameter (DN<40mm), medium diameter and large

Three-way control valve The three-way control valve is a type of multi-port control valve. According to the action mode of the fluid, the three-way control valve can be divided into two types: converging valve and diverging valve. The confluence valve has two populations and flows out from one outlet after confluence. The diverter valve has a fluid population, which is divided into two streams and flows out from two outlets.

Pinch valves are divided into two types: support sleeve and unsupported sleeve. The picture shows a pinch valve without a support sleeve, which is a commonly used pinch valve. An elastic sleeve is installed in a split metal valve body so that the fluid only contacts the sleeve. The metal valve body is a pressure vessel made of cast iron or aluminum, and the operating air pressure should be greater

(1) Precautions before disassembling the floating ball valve For safety, the following items must be noted before the valve is removed from the pipeline or disassembled: ① When disassembling the valve, keep your hands away from the inner cavity of the valve. The remotely operated valve will be closed at any time to injure the operator. ②You should understand the medium in the pipeline, and if you have any questions,