Your Professional Control Valve Manufacturer!
SND TECH is a professional manufacturer specializing in manhole covers, gratings, water meter boxes, pipe fittings, valves, and metal casting products with nearly 20 years of experience. The company integrates casting, machining, surface treatment, and assembly, offering comprehensive OEM solutions with an annual production capacity of 20,000 tons. With advanced manufacturing capabilities and strict quality control, SND TECH provides reliable products and customized services for global infrastructure and industrial projects.
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![High Temperature Wafer Butterfly Valve With Heat Sink Extended Stem]()
High Temperature Wafer Butterfly Valve With Heat Sink Ext...This SND high temperature wafer butterfly valve is engineered with a multi-fin heat sink extended stem, specifically built to isolate and regulate high-temperature media without transferring extreme -
![Pneumatic Diaphragm Single Seat Globe Control Valve]()
Pneumatic Diaphragm Single Seat Globe Control ValveThis pneumatic diaphragm single seat globe control valve is assembled with multi-spring diaphragm pneumatic actuator, intelligent electro-pneumatic valve positioner and stainless steel single-seat -
![Pneumatic Diaphragm Control Valve]()
Pneumatic Diaphragm Control ValveThis pneumatic diaphragm control valve is a critical final control element for industrial automatic process systems. Equipped with a diaphragm‑type pneumatic actuator, Fisher smart valve positioner -
![Electric Cast Iron Flanged Three-Way Control Valve]()
Electric Cast Iron Flanged Three-Way Control ValveThe electric cast iron flanged three-way control valve is a high-precision automatic flow regulation device, specially designed for industrial fluid mixing and diverting systems. Adopting -
![Pneumatic Diaphragm Three‑Way Control Valve]()
Pneumatic Diaphragm Three‑Way Control ValveThe pneumatic diaphragm three‑way control valve is widely used for mixing or diverting fluid in heating, cooling and process systems. Powered by compressed air, it realizes precise flow regulation of -
![Pneumatic Diaphragm Sleeve Control Valve]()
Pneumatic Diaphragm Sleeve Control ValveThe pneumatic diaphragm sleeve control valve is core flow regulating equipment for industrial processes. Equipped with multi-spring pneumatic diaphragm actuator and balanced sleeve trim, it -
![Industrial Control Valve]()
Industrial Control ValveThis is an industrial control valve (float-type hydraulic control valve), an automatic valve controlled by the linkage of hydraulic power and a float. It consists of a valve body, a stainless steel -
![Pneumatic Control Valve]()
Pneumatic Control ValveThe valve body is made of CF8 (equivalent to 304 stainless steel), which is resistant to mild corrosion and suitable for medium and low temperature media.
Why Choose Us
OEM & Custom Solutions
We will formulate exclusive product solutions combined with production capabilities, and provide design drawings for confirmation to ensure customized products meet project requirements.
Extensive Industry Experience
With nearly 20 years of expertise in metal casting and municipal products, we ensure consistent quality and reliable performance.
High Quality
SND has fully passed the ISO9001 quality management system certification and CE. During the production process, it implements a number of strict detailed standards and conducts full-process quality control.
Advanced Equipment
Our company has well-equipped chemical laboratories and physical performance laboratories. A complete set of testing equipment such as Direct Reading Spectrometer, Metallographic Microscope, Hardness Tester, Universal Material Testing Machine and Pressure test machine can be used to effectively control chemical composition and ensure mechanical performance.
Advantages of Control Valve
Precise Control
Control valves can precisely control fluid flow, pressure, temperature, and level. This allows operators to maintain the required process conditions, ensuring optimal system performance.
01
Energy Efficiency
Control valves help optimize energy consumption by precisely regulating flow. They prevent overflow, reducing unnecessary waste and saving energy costs.
02
Safety and Reliability
Control valves are designed to maintain safe operation by preventing overpressure and pressure fluctuations. They also provide precise control, reducing the risk of equipment damage or failure and ensuring system reliability.
03
Flexibility
Control valves can be configured for various applications, making them versatile and suitable for numerous industries. They can handle different types of fluids, pressures, and temperatures, making them easier to adapt to various process requirements.
04
Process Optimization
Control valves facilitate process optimization by precisely controlling various process parameters. This helps improve product quality, reduce downtime, and increase overall productivity.
05
Oil & Gas / Petrochemical
From upstream extraction and wellheads to downstream refining and distribution, control valves manage flow, pressure, and safety-critical operations under extreme conditions.
Chemical Processing
Valves navigate complex and sometimes corrosive fluids, requiring material durability and tight control.
Power Generation
They regulate steam, coolant, and other critical fluids to ensure efficient and safe energy production.
Water Treatment / Supply
Commonly used in municipal and industrial systems to manage flow and pressure in water treatment and distribution.
Metallurgy / Steel Production
In heavy industries like iron & steel, control valves manage thermal, flow, and pressure variables in smelting and refining.
Product Parameters
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Valve body material |
WCB/Stainless steel/Ductile iron |
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Applicable media |
Air, Oil, Gas, Steam, Water,etc |
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Connection |
Flange |
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Power |
Hydraulics/Hydraulics |
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Sealing Type |
Soft Seal/Hard Seal |
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Warranty period |
12 months |
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Certificate |
CE ,IS09001 ,IS014001,IS045001 |
Valve Body
The valve body is the pressure-containing shell that houses the flow path and internal trim. It is designed to withstand system pressure, temperature, and fluid properties.
Valve Trim
Trim refers to the internal components that directly control the flow, including the plug, seat, cage, stem, and sometimes orifices.
Actuator
The actuator converts the control signal into mechanical motion, either linear (for globe or diaphragm valves) or rotary (for ball or butterfly valves).
Key role: Ensures accurate and repeatable movement of the valve stem or shaft in response to the controller signal.
Positioner
The positioner is the interface between the controller and the actuator. It compares the valve position with the control signal and adjusts the actuator to achieve the desired position.
Bonnet and Packing
Bonnet: Provides a sealed interface between the valve body and stem, allowing stem movement while maintaining pressure integrity.
Packing: Prevents leakage along the stem or shaft. Common options include graphite, PTFE, or bellows (for fugitive emission control).
Accessories and Auxiliary Devices
Limit switches: Detect full open or closed positions for safety interlocks.
Solenoid valves & filters: Regulate pilot air supply or actuator pressure.
Bypass lines: Allow maintenance or start-up without disrupting the process.
Noise/cavitation suppressors: Multi-stage trim designs or diffusers reduce vibration and erosion.
Control Valve Types and Categories
Based on Action and Functionality:
Linear Control Valves: These valves provide a linear relationship between the valve's stem position and the flow rate. Globe valves are a common example of linear control valves.
Rotary Control Valves: These valves use a rotary motion to control flow. Ball valves and butterfly valves fall under this category.
Based on Flow Characteristics:
Equal Percentage Valves: These valves provide a change in flow rate proportional to the percentage change in valve position. They are commonly used for applications where the process variable varies widely.
Linear Percentage Valves: These valves provide a linear change in flow rate with respect to valve position. They are used when a consistent linear response is required.
Quick Opening Valves: Quick opening valves provide rapid changes in flow rate at initial valve opening. They are often used for on-off applications.
Based on Actuator Type:
Pneumatic Control Valves: These valves are operated using compressed air or gas to control the valve position.
Electric Control Valves: Electric actuators are used to operate these valves, making them suitable for remote and automated control.
Hydraulic Control Valves: These valves use hydraulic fluid to actuate the valve's position.
Categories Based on Application:
Pressure Control Valves: Used to control and maintain pressure in a system.
Temperature Control Valves: Designed to regulate temperature by adjusting fluid flow.
Flow Control Valves: Used to control the rate of fluid flow in a pipeline.
Level Control Valves: Designed to maintain a constant level of fluid in a vessel or tank.
PE Packaging: Using PE film to completely wrap palletized goods. Its purpose is to waterproof, dustproof, and secure the goods.
Case Packaging: Box-type packaging, where small/precision products are packed into custom-made cases and stacked together. Suitable for protecting fragile parts.
Container: Container shipping is the most commonly used transport medium in international logistics.
Our company guarantees that the goods will be safely delivered to the customer.
FAQ
We're well-known as one of the leading control valve manufacturers and suppliers in China, also supports customized service. Please feel free to buy discount control valve from our factory. For price consultation, contact us.
Pneumatic Control Valve, Globe Control Valve, Industrial Control Valve
