Products Description
The 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 accurately controls pressure, flow rate and temperature for steam, oil, acid & alkali media, gas and other fluids. Featuring low noise, anti-cavitation performance and strong differential pressure resistance, it is widely applied in chemical, power, metallurgy, water treatment and HVAC industries.
Main Structure
Multi-spring Pneumatic Diaphragm Actuator
01
Balanced Sleeve Trim
02
Valve Seat & Sealing Assembly
03
Stem Guide Parts
04
Cast Steel / Stainless Steel Valve Body
05
Product Advantages
Balanced sleeve design reduces unbalanced fluid force for easy opening & closing, suitable for high differential pressure conditions
Sensitive diaphragm actuator with excellent linearity and stable control accuracy
Multi-hole noise reduction sleeve minimizes fluid noise and prevents cavitation erosion
Detachable sleeve assembly for easy maintenance without full valve disassembly
Multiple sealing materials optional, corrosion, high temperature and wear resistant for complex chemical media
Compatible with valve positioner, solenoid valve, air filter regulator for full automatic control
Applicable Media
| Steam |
| Water |
| Heat Transfer Oil |
| Crude Oil & Refined Oil |
| Acid & Alkali Corrosive Liquid |
| Industrial Gas |
Certificate
The CE label is a mandatory safety certification for all merchandise marketed within the European Union. It serves as official proof that the product meets the EU's health, safety and environmental protection standards, granting legal authorization for distribution and sales throughout all EU nations.
ISO certification, released by the International Organization for Standardization, is an internationally recognized quality management system certificate. While not a legal mandatory requirement, it is widely accepted worldwide as a credible symbol of consistent product quality. Possessing ISO accreditation demonstrates that an enterprise implements standardized quality management workflows, and can stably produce items that meet customer expectations and relevant regulatory specifications.
Company Profile
Based at Wu'an Industrial Park in Hebei, SND has matured into an integrated industrial manufacturer covering design, technical research, production and global sales following long-term stable operation.
Our foundry boasts more than 10 years of expertise in producing and exporting manhole covers, drain gratings, valves, pipeline fittings and custom metal castings. Our production workshop features two vertical molding lines, one horizontal line and an automatic spraying line, complemented by core shooting equipment and a manual molding zone tailored for oversized OEM custom pieces. Our internal design and technical crew enables us to provide clients with seamless one-stop support services.
Our cast components serve infrastructure projects of all types: railways, road networks, airports, schools, public constructions, residential zones and defense premises. Cutting-edge production hardware, standardized strict process inspection and solid corporate integrity help us gain consistent recognition from customers.
Our merchandise enjoys great popularity throughout China, while also being exported to India, Singapore, Middle Eastern countries, Mexico, America, Europe and many other global regions.
FAQ
Q: What is a pneumatic diaphragm sleeve control valve used for?
A: It is a core automatic regulating valve for industrial process systems. It uses pneumatic diaphragm actuator to convert air pressure signal into mechanical stroke, so as to precisely adjust the flow, pressure and temperature of pipeline media. It is widely used for automatic regulation in chemical, power, metallurgy, water treatment and HVAC industries.
Q: What is the difference between sleeve control valve and single-seat / double-seat valve?
A: Different from ordinary single-seat and double-seat valves, it adopts balanced sleeve trim structure. The medium force is balanced inside the sleeve, which greatly reduces opening and closing torque. It features higher stability, better anti-vibration performance, lower noise and stronger anti-cavitation ability, more suitable for high differential pressure working conditions.
Q: What is its flow characteristic?
A: Two standard flow characteristics are available: Linear and Equal Percentage. Linear type is suitable for general stable flow regulation, while equal percentage type is ideal for frequent load fluctuation and precise process control.
Q: What media can this valve handle?
A: It is compatible with water, steam, heat transfer oil, crude oil, refined oil, compressed air, various industrial gases and weak corrosive acid and alkali liquids. With upgraded stainless steel trim and special sealing materials, it can adapt to moderately corrosive media.
Q: Can it work under high differential pressure?
A: Yes. The pressure-balanced sleeve design offsets most fluid thrust, enabling stable operation under high differential pressure conditions without jamming or unstable oscillation, which is the biggest advantage over traditional single-seat valves.
Q: What are the main components of the valve?
A: It consists of multi-spring pneumatic diaphragm actuator, balanced sleeve trim, valve plug, valve stem, valve seat, sealing assembly and integral valve body. The compact structure ensures sensitive response and stable operation.
Q: Why does the valve respond slowly?
A: Common reasons include insufficient air supply pressure, blocked filter regulator, positioner deviation or aging diaphragm. Regular cleaning of air circuit and calibration of positioner can effectively solve slow response problems.
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