A gate valve is a type of shut-off valve that is opened and closed by a vertically moving gate. Its core component is a wedge-shaped or parallel gate plate. During operation, the valve stem drives the gate plate to rise and fall perpendicular to the fluid direction. When fully opened, the channel is unobstructed and the flow resistance is minimal. When fully closed, reliable cutting is achieved by tightly fitting the sealing surface. The main characteristics of gate valves are distinct: low flow resistance, suitable for straight through pipelines; Long opening and closing stroke, slow opening and closing speed; Good sealing performance, but the sealing surface is prone to wear and tear. It usually does not have the function of regulating flow and is mainly used in fully open or fully closed working conditions. The valves produced by Kaiweixi Valve are widely used in the fields of petroleum, chemical, water supply and drainage, energy, etc. Soft sealed gate valves are particularly suitable for clean water, while hard sealed gate valves are suitable for media such as oil and steam, but are not suitable for fluids containing particles, and are generally not used to control flow to avoid erosion of the sealing surface. Knife type gate valves are suitable for media containing long fibers, and slurry gate valves can be used for media with high viscosity.

Butterfly valve is a compact shut-off and regulating valve. Its core component is a disc-shaped butterfly plate fixed on the valve stem, which can be opened and closed by rotating about 90 °. The driving methods include electric, pneumatic, hydraulic, turbine, manual, etc. According to the connection method, it can be divided into clamp type, flange type, butt welding, etc; According to the sealing form, it can be divided into soft seals (rubber, polytetrafluoroethylene) and metal seals to adapt to different temperature and pressure conditions. The main characteristics of butterfly valves are prominent: simple structure, small volume, light weight, and quick opening and closing; The flow resistance is relatively small, and a certain degree of flow regulation can be achieved by changing the butterfly plate opening; Relatively low cost and easy maintenance. However, its sealing performance is greatly affected by pressure and temperature, and there may be trace leaks when fully closed under specific operating conditions. The butterfly valves produced by Kaiweixi are widely used in industries such as water supply and drainage, fire protection, heating and ventilation, chemical industry, and power. They are particularly suitable for large-diameter pipelines and are suitable for transporting media such as water, air, oil, and slurry. When selecting, it should be noted that soft sealed butterfly valves are usually used at room temperature and low pressure, while metal seals are required for high temperature and high pressure conditions.

A ball valve is a core shut-off valve that opens and closes by rotating a ball with a through-hole. The core component is a precision sphere, and the valve stem drives the sphere to rotate 90 ° during operation. When the spherical through-hole is aligned with the pipeline axis, it is fully opened, forming an almost unobstructed flow channel; When rotated 90 degrees vertically, it is completely closed, relying on the valve seat to achieve a tight seal. The main characteristics of ball valves are extremely distinct: extremely low flow resistance, close to straight pipes; The opening and closing are extremely fast, only requiring a quarter turn; Excellent sealing performance, especially in floating or fixed structures, can achieve bidirectional zero leakage; Compact structure and high reliability. Large caliber ball valves are expensive and not suitable for slurry media containing solid particles. The ball valves produced by Kaiweixi have become key equipment for oil, natural gas, chemical, long-distance pipelines, and fine industries due to their excellent cutting ability. They are widely used in water, oil, gas, steam, and various corrosive media. Its variants, such as V-shaped ball valves, can also be used for flow regulation.

A globe valve is a type of valve that changes the cross-sectional area of a channel by vertically lifting and lowering the valve disc to achieve opening, closing, and adjustment. The core lies in the valve stem driving the valve disc to move vertically along the centerline of the valve seat, and precisely controlling the flow rate by changing the distance between the valve disc and the valve seat, ultimately achieving complete shut-off. The main characteristics of globe valves are significant: excellent regulating performance, linear relationship between opening and closing height and flow rate, which facilitates precise control; The sealing surface has minimal wear, and there is no relative sliding between the valve disc and the valve seat during opening and closing; The work schedule is long, so the opening and closing speed is slow; The flow resistance is high because the fluid flows in an "S" shape inside the valve; The installation is directional and must follow the principle of "low in, high out", so that the medium pressure acts on the valve disc above when closing to assist in sealing. The globe valves produced by Kaiweixi are widely used in pipelines for steam, oil, water, and corrosive media, especially in situations where flow regulation or high-pressure sealing is required but flow resistance requirements are not strict. Not suitable for media with high viscosity or containing solid particles.

A check valve (also known as a check valve or one-way valve) is a type of valve that automatically opens and closes based on spring pressure, the weight of the valve plate, and the kinetic energy of the medium's own flow. Its function is to prevent the medium from flowing back, and it is an automatic valve. Except for hydraulic check valves, all other check valves do not have external control mechanisms and only allow one-way passage of the medium. When the medium flows forward, pressure pushes the valve disc (or spool) open; Once the flow stops or reverse flow occurs, the valve disc automatically closes under the action of its own weight, spring force, or reverse fluid, forming a seal. The main types of check valves are divided according to their structural principles: swing type, lift type, butterfly type (clamp type), and ball type. The main feature of a check valve is that it works automatically and does not require external operation, but it may generate a certain flow resistance. During installation, the flow direction of the medium marked on the valve body must be strictly followed and cannot be reversed. The check valve produced by Kaiweixi is a key safety component in all pump and compressor outlets and pipeline systems that do not allow medium backflow. It can effectively prevent medium backflow, avoid equipment damage and system failures, and is widely used in fields such as water supply and drainage, petrochemicals, power, and HVAC.

A pressure reducing valve is a control valve that reduces and stabilizes a higher inlet pressure at the desired outlet pressure through manual or automatic adjustment. Its core function is to stabilize and reduce pressure, maintaining the outlet pressure at the set value regardless of fluctuations in inlet pressure or flow rate. Its working principle is mainly based on force balance. Compare the preset force of a spring or induction outlet pressure (such as through a diaphragm or piston) with the predetermined force of a spring. When the outlet pressure of the self operated pressure reducing valve deviates from the set value, the force difference will drive the valve disc to move, change the valve seat opening, adjust the flow area, and ultimately automatically restore and stabilize the outlet pressure. The structure of a direct acting pressure reducing valve is simple, and it uses the outlet pressure to directly drive the valve disc, making it suitable for small diameter and low pressure drop applications. The pilot operated pressure reducing valve amplifies the control signal through the pilot valve, and the main valve responds quickly with high voltage stabilization accuracy, making it suitable for large-diameter and high-pressure differential working conditions. The main feature of pressure reducing valves produced by Kaiweixi is automatic adjustment and maintaining constant outlet pressure. They are widely used in steam systems, water supply pipelines, gas distribution, hydraulic systems, and industrial production.

Air valve is a special automatic valve used in water supply and drainage pipeline systems, whose core function is to enter and exit air to ensure the safe and efficient operation of pipelines. An air valve is the "breathing organ" of a piping system that automatically removes or inhales air. Its work is based on the principle of float or float lever. There is a floating ball inside the valve body, which automatically opens and closes according to the density difference between water and air. When the pipeline is filled with water, the internal air is quickly expelled; When the pipeline is running normally, the float rises and closes the exhaust port; When the pipeline drains or generates negative pressure, external air is automatically drawn in to prevent vacuum. The air valves produced by Kaiweixi are divided into three categories according to their functions: 1. Inlet and exhaust valves: quickly discharge a large amount of air (when filling with water) or suck in air (when draining). 2. Micro exhaust valve: continuously eliminates trace bubbles that precipitate in the water during operation, improving water delivery efficiency. 3. Composite air valve: It combines the first two functions and is the most commonly used and effective type. It is crucial to install correctly at all high points and local elevations of the pipeline system, as incorrect installation positions can lead to its failure. Air valves are essential safety accessories for liquid pipelines such as long-distance water delivery, municipal water supply and drainage, pump stations, and siphon systems. They can effectively prevent air resistance, water hammer, pipeline vacuum deformation, and efficiency decline.

A balance valve is a specialized valve with precise measurement and adjustment functions, used for flow regulation and pressure balance in hydraulic systems. The core purpose is to allocate the flow and pressure of each branch reasonably through artificially set resistance, so that the system can achieve the design conditions and eliminate uneven heating and cooling or hydraulic imbalance. The balance valves produced by Kaiweixi Valve are mainly divided into two categories: 1. Static balance valve: a valve with a measuring port that can accurately adjust the opening and lock it. Special instruments are required to measure the pressure difference before and after the valve, obtain the actual flow rate through calculation or charts, and allocate the flow rate through repeated adjustments. Once set and locked, its resistance coefficient remains fixed while the system remains unchanged. 2. Dynamic balance valve: a self operated regulating valve. It is further divided into dynamic flow balance valve (which automatically stabilizes the pressure at the set flow rate and is not affected by system pressure fluctuations) and dynamic pressure difference balance valve (which maintains a constant pressure difference in the controlled branch). They can automatically adapt to system changes and achieve smarter balance. It is an indispensable core regulating device in complex circulation pipelines such as central heating, air conditioning hot and cold water systems, and district heating, which can effectively improve system energy efficiency.

A filter is a device installed in a fluid pipeline to physically intercept and remove impurities. Its core function is to protect downstream critical equipment from blockage, wear, or contamination, thereby ensuring system cleanliness and stable operation. Its working principle is based on mechanical screening, deep filtration, or adsorption. When the fluid passes through the built-in filter element, solid particles larger than the filter holes or filter material pores are effectively intercepted, while the clean fluid passes through. The material and precision of the core component filter (or mesh) determine its performance and application. The Y-shaped and T-shaped filters produced by Kaiweixi have a simple structure and use metal filters for coarse filtration, intercepting larger particles. Basket filter: With a larger capacity, it can intercept more impurities and is commonly used for pump protection. Its main features are a large dirt holding capacity, low flow resistance, and easy cleaning or replacement. Filters are essential pre equipment for protecting pumps, instruments, heat exchangers, and precision valves (such as pressure reducing valves and control valves) in all industrial fluid systems (such as water supply, petrochemicals, refrigeration, and hydraulic systems).

Hydraulic control valve is a valve combination that uses the pressure of the pipeline medium itself as the power source, and achieves various automation functions through a preset pilot valve control system. The core of other forms of hydraulic control valves, except for electromagnetic remote control float valves and electric remote control valves, is that they do not require external power or gas sources, and only use the pressure energy and logic control of water (or fluid) to complete complex adjustments and operations. Its working principle is a typical self operated control. Through a control system consisting of a pilot valve, conduit, and diaphragm (or piston) actuator, changes in pressure, flow rate, or liquid level are sensed, and the main valve disc is automatically driven to achieve the predetermined function. Kaiweixi Valve mainly produces pressure reducing and stabilizing valves, pressure holding/relief valves, flow control valves, hydraulic electric control valves, float ball control valves (remote control float ball valves), etc. It is a core automation component in the fields of building water supply, fire protection systems, HVAC, district heating and irrigation, which can effectively achieve pressure zoning, flow balance, safety protection and automatic water supply of the system. It is a key equipment to improve the intelligence and safety of the system.

The control valve is the ultimate actuator in the process control loop. Its core function lies in continuously and precisely regulating the flow, pressure, temperature, or liquid level of the medium in the pipeline according to control signals (pneumatic, electric, or hydraulic), thereby stabilizing the controlled process parameters at set values. It typically consists of an actuator (power source) and a valve body assembly (flow control part). Its regulating characteristics depend on the specific design of the valve core (such as linear, equal percentage) to achieve different flow control curves. The core features of a regulating valve lie in its precise controllability and dynamic response capability. Its performance directly determines the accuracy, stability, and efficiency of the entire automatic control system. Kaiwei Xi Valve Group mainly produces electric control valves, pneumatic control valves, hydraulic control valves, self-actuated control valves, low-temperature control valves, high-pressure control valves, pressure control valves, and other regulating valves. These are core equipment for automation in continuous production processes in petrochemical, power, metallurgical, pharmaceutical, and other industries, widely used in key areas such as reactor feed control, heat exchanger temperature regulation, and tank level management.

A safety valve is an ultimate safety protection valve that does not require external force to actuate, but relies on the pressure of the medium itself to open automatically and closes automatically with the help of spring pressure. Its core function is to relieve excessive system pressure. When the pressure exceeds the set safety value, it automatically opens to discharge, and closes automatically after the pressure returns to normal, preventing equipment overpressure from causing explosion or damage. It is the "safety guardian" of industrial systems. From the structural principle, it is mainly divided into: spring type: using spring force to balance with medium pressure, which is the most widely used; lever type: loaded by lever and heavy hammer, used for fixed applications; pilot type: controlling the main valve action through a pilot valve, used for high-pressure and large-displacement conditions. Its core performance requirements are precise action, sufficient discharge capacity, reliable sealing, and accurate and timely resetting. The full-opening safety valve, micro-opening safety valve, spring safety valve, lever safety valve, pilot safety valve, API American standard safety valve, GOST Russian standard safety valve, and other safety valves produced by Kaiwei Xi Valve Group are key safety accessories legally required to be installed in all pressure-bearing systems such as boilers, pressure vessels, petrochemical plants, and long-distance pipelines.

Solenoid Valve Models: DFD / RSP / 2W / ZW / YSA / ZCF / PS / RSH / 2L / GWDRY / YSE / RSPS / ZCT / YSI / YSP / SLDF / ZCM / ZK / EX / ZCSB / YSG / RSZ / YSZ / RSQ / RSV / RSC / UD / VX2 / RSSM / RSW / RST / RSO / CDW / ZCZ / ZQDF / 231 / VMI / YSF Solenoid valves are industrial actuation components that use electromagnetic force to automatically control the on/off of fluids (liquids or gases), and they are among the core fundamental components for achieving automation control. Their core working principle is based on electromagnetic induction: when the solenoid coil is energized, it generates a magnetic field that attracts the internal valve core (moving iron core), thereby changing the state of the fluid passage. When power is cut off, the valve core returns to its initial state by spring force. This electrical control method allows seamless integration with control systems such as PLCs, enabling remote and fast automated operations.Kaivex Valve Group produces a wide variety of solenoid valves. Based on the mode of operation, they are mainly divided into direct-acting type (relying directly on electromagnetic force for actuation, suitable for low-pressure and small-diameter applications) and pilot-operated type (using the pressure difference of the medium to drive the main valve, suitable for high-pressure and large-diameter applications). According to the flow path function, they can be further divided into "2/2-way" valves that control single-path on/off, as well as "3/2-way" and "5/2-way" valves used for switching flow direction or controlling cylinders. With advantages such as fast response speed, compact structure, high reliability, and the ability to be driven solely by electrical signals, solenoid valves are widely used in many fields including industrial automation, water treatment, HVAC, automotive, and medical equipment.

Needle Valve Models: GMJ11 / J19 / J29 / JJM1 / J41 / J44 / J91 / J11 / J13 / J14 / J23 / J21 / J24 / J21 / J23 / J24 / J26 / J61 / 1151 / EF-2 / SS-M2F8 / J23SA / QFF3 / WF / SS-M5F8 / SF-2BQF / 3051 A needle valve is a precision shut-off valve, named for the sharp conical (needle-shaped) tip at the end of its valve stem. It uses the small annular gap between the needle-shaped cone at the bottom of the valve stem and the valve seat to achieve fine regulation of fluid flow or forced shut-off. The greatest feature of a needle valve is its excellent throttling and shut-off capability. Driven by a precision threaded pair, the valve stem moves slowly and linearly, allowing the opening between the conical surface and the valve seat to be controlled within a very small range, thereby delivering a stable and fine flow output. It is suitable for applications requiring micro-flow control, such as analytical instrument sampling and pressure gauge buffer protection. At the same time, the compressed conical surface forms a non-rotating wedge seal. Needle valves from Kaivex Valve Group can withstand high pressures (up to over 6000 psi) and ensure extremely high shut-off sealing performance. Structurally, they generally feature straight-through or angle designs. It is particularly important to note that due to their narrow flow path, needle valves are not suitable for steam, high-viscosity fluids, or media containing solid particles.

Forged steel valves refer to valves whose main pressure-bearing components, such as the valve body, are formed through forging processes. Forging is a processing method that involves plastic deformation of a metal billet under high temperature through hammering or pressure, resulting in the desired shape and size. Compared to cast valves, the core advantages of forged steel valves stem from their dense internal organizational structure: higher material strength, better toughness, and finer grain size. This brings significant performance improvements: extremely strong pressure-bearing capacity, capable of withstanding higher pressures and temperatures; excellent impact resistance and fatigue resistance, suitable for high-pressure, large-diameter, and harsh alternating load conditions; higher safety, greatly reducing the risk of leakage or rupture due to internal casting defects such as sand holes and air holes. Forged steel valves are usually suitable for high-end applications with small to medium diameters (generally below DN300). The forged steel gate valves, forged steel globe valves, forged steel check valves, forged steel ball valves, forged stainless steel gate valves, forged stainless steel globe valves, forged stainless steel ball valves, and other forged steel valves produced by Kaiwei Xi Valve Group are the first choice in high-temperature and high-pressure steam systems, petrochemical key devices, power stations, and various ultra-high pressure or high safety requirements special industrial pipelines, representing the highest reliability and safety of valves under extreme working conditions.

Low-temperature valves are specialized valves designed for extremely low temperature conditions of -40°C and below, primarily used to safely and reliably control cryogenic media such as liquefied natural gas (LNG), liquid nitrogen, and liquid oxygen. The core challenges lie in the "cold brittleness" of materials at low temperatures and the abnormal pressure rise risk posed by medium vaporization. Therefore, valves must meet special design requirements: firstly, materials that maintain toughness at low temperatures, such as austenitic stainless steel, Monel alloy, or low-alloy steel with special heat treatment, must be selected; secondly, long-neck valve covers must be adopted to protect the valve stem seal (packing or bellows) from ultra-low temperatures, prevent it from freezing and failing, and reduce cold loss; in addition, the internal structure must ensure reliable sealing and smooth discharge of potentially vaporized media. Depending on the application depth, low-temperature valves are commonly divided into general-purpose low-temperature valves (-40°C to -100°C) and deep-cold valves (below -100°C). The low-temperature gate valves, low-temperature globe valves, low-temperature check valves, low-temperature ball valves, low-temperature butterfly valves, ultra-low temperature globe valves, ultra-low temperature top-mounted ball valves, and other low-temperature valves produced by Kaiwei Xi Valves are core equipment in the LNG industry chain, air separation units, petrochemical cryogenic separation, and low-temperature storage and transportation systems.

Valve Actuator Models: DZW / DQW / 2SA / 2SQ / 2SDQ / 2SB / SDQ / XZA / SMC / QT / QB / 903 / 802 / ZB / ZC / QB / DQ / SND / PSL / AW / GT / AT / AB / D / SB / KB A valve actuator is the core device in an automatic valve system that drives the movement of the valve core. It receives control signals and outputs mechanical force to achieve valve opening, closing, or regulation. Classified by energy source, in addition to manual gearboxes, there are three main types: pneumatic, electric, and hydraulic.Pneumatic actuators have a simple structure, fast response, and explosion-proof safety, making them commonly used in the petrochemical industry.Electric actuators are convenient to power, offer precise control, and are suitable for water treatment and building automation.Hydraulic actuators provide the highest thrust output and are mainly used in heavy-duty engineering.Classified by motion type, there are linear-stroke actuators (output linear displacement, suitable for globe valves) and quarter-turn actuators (output angular displacement, suitable for ball valves and butterfly valves). Rotary actuators can be further divided into single-acting (spring return) and double-acting (air-to-open, air-to-close) types.Core technical parameters include output torque/thrust, full stroke time, control signal type (on/off or 4-20mA analog), and ingress protection/explosion-proof rating. Modern actuators often integrate positioners, limit switches, and fault alarm functions, and can be connected to bus control systems.