The function of the positioners is to guarantee that the valve position is assigned to the input signal in a predetermined manner. The controlled variable, x, is the valve position, while the reference variable, w, is the input signal. The positioners compare the input signal received from the control system with the travel of the control valve and generate an appropriate output signal pressure, pst, which is the output variable, y.

For double-acting actuators, a reversing amplifier is used to create two opposing signal pressures. This amplifier takes the output signal pressure pst from the positioners as an input, and then produces a pair of signal pressures, which work to move the actuator in opposite directions. This doubles the actuator's effective range, allowing it to open or close the valve completely.

Features:

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Technical Parameters:

Applications:

Positioners are devices that are attached to pneumatic control valves to ensure their proper functioning. They help in positioning the valve plug accurately, which is essential for smooth control of the fluid flow.

Single-acting and double-acting positioners are two types of positioners that are commonly used. Single-acting positioners use air pressure to move the valve in one direction, while a spring moves it in the opposite direction. On the other hand, double-acting positioners use air pressure to move the valve in both directions.

Both types of positioners have their advantages and disadvantages. Single-acting positioners are relatively simpler and can be more cost-effective than double-acting positioners. Additionally, they consume less air and require less maintenance. However, they may not be suitable for certain applications that require precision control.

Double-acting positioners, on the other hand, offer greater precision and control. They are better suited for applications that require accurate control over the fluid flow. However, they may be more expensive and can consume more air than single-acting positioners. They may also require more maintenance.

Support and Services:

Our Control Valve Positioner product is designed to provide accuracy and reliability in controlling the position of valves in various industrial applications. We offer comprehensive technical support and services to ensure that our customers get the most out of their investment in our product. Our technical support team is available to assist with any questions or concerns regarding installation, operation, and maintenance of the Control Valve Positioner. Our services include calibration, repair, and replacement of parts if necessary. We also offer training sessions for customers who want to learn more about our product and its capabilities. Our goal is to provide the best possible support and services to our customers to ensure optimal performance of their Control Valve Positioner.

Packing and Shipping:

Product Packaging:

• The control valve positioner is packaged securely in a sturdy cardboard box.
• The box contains foam inserts to prevent any damage during shipping.
• Each positioner comes with an instruction manual and any necessary mounting hardware.

Shipping:

• We offer free shipping within the continental United States.
• All orders are processed within 24-48 hours and shipped via UPS or FedEx.
• Delivery time is typically 3-5 business days.
• We also offer expedited shipping options for an additional fee.

Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves

Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive industry experience, we provide our customers with a comprehensive range of products from renowned global brands, ensuring reliability and performance in industrial automation and control systems.

Our Product Portfolio:

• Pneumatic Control Valves: We offer top-tier products from industry giants such as Fisher, Samson, Koso, Masoneilan, Flowserve, Metso/Neles, CCI/STI, HORA, KTM, Sempell, Keystone, WEIR, Azbil, and leading Chinese brands.
• Safety Valves: Our selection includes Crosby, Dresser, Leser, and various well-established Chinese brands.
• Electric Actuators: We supply high-quality actuators from ROTORK, Limitorque, Auma, SIPOS, PS, and other respected Chinese manufacturers.
• Measurement and Instrumentation: Our portfolio features reliable pressure, temperature, level, and flow transmitters from Rosemount, E+H, Yokogawa, ABB, Siemens, VEGA, Krohne, Magnetrol, WIKA, and Chinese brands.
• Distributed Control Systems (DCS): We provide advanced systems from leading brands such as Ovation, DeltaV, Schneider-Foxboro, Honeywell, and ABB.

Why Choose Us?

• Extensive Experience: With years of expertise in control valves and instrumentation, we have developed a deep understanding of our customers' needs and requirements, enabling us to offer tailored solutions that optimize performance and efficiency.
• Diverse Product Range: We are proud to offer both internationally recognized and high-quality Chinese brands, ensuring that we can meet a wide range of customer specifications with competitive pricing and short delivery times.
• Reliable Support: Our team is committed to providing exceptional customer service and technical support, helping customers select the right products and ensuring seamless integration into their systems.

We are confident that our rich industry experience and diverse product offerings will make us a strong partner in fulfilling your automation and control needs. We look forward to the opportunity for long-term and mutually beneficial cooperation.