Diaphragm hydraulic control valve is a type of valve that uses the pressure of the pipeline medium itself as a power source, and performs multifunctional automatic adjustment through a diaphragm transmission component and an external pilot valve control system. Its core structure includes a main valve body, rubber diaphragm, valve disc, spring, and one or more pilot control valves (such as solenoid valves, pressure reducing valves, throttle valves, etc.). Its working principle is to use the pressure difference between the upper and lower chambers of the diaphragm to drive the opening and closing or adjustment of the main valve disc, and the pressure difference is precisely controlled by the pilot valve according to the changes in system parameters such as pressure, flow rate, and liquid level. Kaiweixi Valve mainly produces diaphragm type remote control float valves, diaphragm type adjustable pressure reducing valves, diaphragm type slow closing check valves, diaphragm type holding pressure relief valves, diaphragm type differential pressure bypass valves, diaphragm type holding pressure relief valves and other diaphragm type hydraulic control valves. They do not require external power sources or hydraulic stations and rely on hydraulic self-reliance to achieve various functions, such as pressure reduction, stabilization, pressure relief, holding pressure, flow control, water level control and pump control. Diaphragm hydraulic control valves are widely used in automatic control of building water supply and drainage, fire protection, HVAC, agricultural irrigation, and industrial water supply systems.

Piston type hydraulic control valve is a valve that uses a piston structure to achieve fluid control. The core working principle is to precisely adjust the flow rate or pressure inside the pipeline by changing the flow area through the up and down movement of the piston in the valve chamber. This valve usually consists of a main valve, a pilot valve, and a control system. It uses the pressure difference of the pipeline medium itself as power to control the action of the piston through feedback and guidance from the pilot valve. Kaiweixi Valve mainly produces piston type hydraulic control valves such as adjustable pressure reducing and stabilizing valves, safety relief and pressure holding valves, electromagnetic remote control float valves, pressure difference bypass balance valves, remote control float valves, adjustable pressure reducing valves, and slow closing check valves. The main characteristics are high control accuracy, smooth operation, tight closure, strong adaptability to pressure fluctuations, and the ability to effectively eliminate the influence of water hammer and improve system safety. Widely used in fields such as water supply and drainage systems, fire protection pipelines, HVAC systems, agricultural irrigation, and industrial processes, it is mainly used to achieve functions such as pressure reduction, stabilization, relief, flow control, water level regulation, and remote switching.

The multifunctional water pump control valve is an intelligent valve designed specifically for water pump units that integrates multiple hydraulic control functions. It is usually installed at the outlet end of the water pump, integrating the main functions of a check valve, gate valve (or butterfly valve), water hammer eliminator, and flow/pressure regulating valve. Its core working principle is to achieve automated operation through hydraulic self-control and slow closing technology. The valve utilizes the pressure changes of the medium inside the pipeline as control signals through a conduit system and buffering device. Slowly start the water pump to prevent current shock and sudden pressure rise; When stopping the pump, it is quickly and slowly closed in two stages according to the preset program, effectively eliminating water hammer during pump shutdown and protecting the safety of the water pump and pipeline system. Some models can also achieve auxiliary functions of flow regulation and pressure stability. Kaiweixi Valve Group mainly produces diaphragm type multifunctional water pump control valves, piston type multifunctional water pump control valves, diaphragm type multifunctional water pump control valves and other water pump control valves, which have significant advantages such as compact structure, comprehensive functions, high degree of automation, safety and reliability. Widely used in pump station systems for building water supply and drainage, fire protection, HVAC, industrial water supply, and agricultural irrigation.

Mud Drain Valve，Also known as a blowdown valve or tank bottom valve, the mud drain valve is a specialized valve used in sewage treatment plants or waterworks production systems for periodically discharging sediment, sludge, or wastewater accumulated at the bottom of tanks or ponds. Its core function is to remove solid deposits from the bottom of storage tanks or ponds, ensuring system flow and medium cleanliness. Typically installed at the lowest point or sedimentation area of a system, mud drain valves are often designed in angular or straight-through configurations, with flat-bottomed or funnel-shaped valve bodies to facilitate sediment collection. Common types include piston-style and diaphragm-style valves, which can be manually, pneumatically, or electrically operated to enable timed or remote-controlled drainage. Alternative designs, such as knife gate valves or globe valves, are also used for similar purposes. Mud drain valves produced by Kaiweixi Valve Group feature simple flow paths, reliable sealing, and excellent resistance to wear and corrosion. Their valve seats and sealing components are often made of wear-resistant rubber or hard alloys to withstand erosion from sand, silt, and particles. These valves serve as critical auxiliary equipment in municipal sewage treatment systems, sedimentation tanks in water treatment plants, industrial circulating water systems, petroleum and chemical storage tanks, and ash removal systems in power plants.