Oct 12,2021

Knowledge of soft seal gate valve

The soft seal gate valve is also called the lifting stem gate valve (also called the rising stem gate valve). Usually there is a trapezoidal thread on the lifting rod, through the nut of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is, the operating torque is changed into operating thrust.

Oct 12,2021

Self-operated flow control valve adjusts hydraulic imbalance in heating pipe network

The self-operated flow control valve can accurately adjust the flow, and is easy to operate and stable. The use of self-operated flow control valves not only solves the hydraulic imbalance of the heating pipe network, but also improves the heating effect, saves energy, and has a good effect on the economic and social benefits of heating enterprises.

Oct 12,2021

Application of hydraulic control valve in building water supply engineering

The hydraulic control valve is a combination of a main valve and its external needle valve and pilot valve. Hydraulic control valve is a general term for a series of multi-purpose control and similar valves. Their main features are: They use the medium's own pressure and hydraulic system operation in the mode of action, and can be automatically controlled, with accurate action and performance, and can be widely used in life production and fire water supply system pipelines to control and function.

Oct 12,2021

The working principle and function of flow limiting check valve

The flow-limiting check valve is installed at the outlet of the water pump. When a single pump is started and a non-full-design working pump is working, it will limit the flow of the working pump and make the pump work at a relatively high rate; prevent the motor from working at low head, large flow, and When the efficiency is low, an overload phenomenon occurs; it prevents the occurrence of the phenomenon of burning the motor with an over-rated current, and at the same time, it has an energy-saving effect. The check function of the flow-limiting check valve is equivalent to the micro-resistance slow-closing check valve, and there is no closing noise and zero backflow.

Oct 12,2021

Gate valves are classified according to the structure of the stem

Open-stem gate valve: The stem nut is on the bonnet or bracket. When the gate is opened and closed, the stem nut is rotated to achieve the lifting of the stem. This structure is beneficial to the lubrication of the valve stem, and the degree of opening and closing is obvious, so it is widely used.  

Oct 12,2021

Selection of control valve

Requirements for control travel time: The selected control valve actuator should be able to meet the requirements of the valve travel and process for the level of leakage. In some occasions, if the pressure control valve (including the vent valve) is selected, the actual possible pressure difference should be considered for appropriate amplification, that is, the actuator is required to provide a larger force. Otherwise, when there is an abnormal situation in the process, the actual pressure difference before and after the control valve is relatively large, which may cause the danger of not being able to close or open.

Oct 12,2021

Structural characteristics of flow control valve

Structurally speaking, the flow control valve is a two-valve combination, which consists of a manual control valve group and an automatic balance valve group. The function of the manual control valve group is to set the flow rate, and the function of the automatic balance valve group is to maintain a constant flow rate.

Oct 12,2021

Troubleshooting of soft seal gate valve

The soft-seal gate valve is powered by compressed air, and the ball rod drives the ball to rotate 90 degrees to achieve a fully open-fully closed action. Valve seat form: T, F, C type. Its supporting accessories include air filtration and decompression Valves, limit switches, solenoid valves. Among them, the main function of the air filter pressure reducing valve is to stabilize the pressure, filter impurities and water vapor in the air. The fault that often occurs during the use of the valve is air leakage. The following briefly introduces the valve Common faults and corresponding maintenance methods.

Oct 12,2021

Working principle of pressure reducing valve

The pressure reducing valve is a special device that automatically reduces the working pressure of the pipeline. It can reduce the higher water pressure in the pipeline before the valve to the level required by the pipeline after the valve. Pressure reducing valves are widely used in high-rise buildings, areas where the water pressure of the urban water supply pipe network is too high, mines and other occasions to obtain appropriate service water pressure and flow at each water point in the water supply system. In view of the fact that the water leakage rate and the degree of waste are almost proportional to the water pressure of the water supply system, the pressure reducing valve has system operating conditions and potential water saving effects. According to statistics, its water saving effect is about 30%. In order to adjust the level of accuracy, this valve has a good installation effect.

Oct 12,2021

Shengfeng Automation Appeared in Hangzhou Industry Fair to Bring Gospel to Smart Water Meter Industry

Botou Shengfeng Automatic Control Valve Co., Ltd. (hereinafter referred to as Shengfeng Automatic Control), which researches and produces energy-saving valves, was dressed up to attend the 13th Zhejiang (Hangzhou) Equipment Manufacturing Industry Expo (hereinafter referred to as the Industry Fair) on May 9, 2014 .