The function of the positioners is to ensure that the valve position, which is the controlled variable x, is assigned a predetermined input signal or reference variable w. The input signal received from a control system is compared to the travel of the control valve by the positioners. They then generate a corresponding output signal pressure, pst, which is the output variable y.
The double-acting actuators utilize a reversing amplifier to produce two opposed signal pressures. By doing so, the actuators can move the valve in either direction. Therefore, if one signal pressure is increased, the other pressure is decreased in an opposed manner.
The positioners play an essential role in industrial control systems. Without them, it would be challenging to assign a specific input signal to the valve position accurately. The reversing amplifier in the double-acting actuators ensures that the valve can move in both directions, giving greater control and flexibility in the system.
The product can be mounted in any position and is suitable for both normal and split-range operations. It boasts an excellent dynamic response and has a negligible influence on the supply air. The proportional band (P band) is adjustable, as is the air output capacity. The product has a low air supply consumption and is very insensitive to mechanical vibrations. Additionally, its low-maintenance compact design makes it easy to use.
There are different versions of this product available for use in hazardous areas. These versions have the type of protection intrinsic safety II 2G Ex ia IIC T6 or II 3G Ex nA II T6 for Zone 2.
There is also a type of protection called "Flameproof enclosure" Ex d with Type 3766 Positioner and Type 6116 i/p Converter (Fig. 2). This is an option for attaching the product.
The product can also be directly attached to Type 3277 Actuator (Fig. 3). Additionally, it can be attached to actuators according to IEC 60534-6 and rotary actuators according to VDI/VDE 3845.
| Product Name | Samson 3767 Valve Positioner |
| Brand Name | Samson |
| Usage | Challenging Transit Times And Ambient Conditions |
| Material | Aluminum |
| Control Loop | 4 To 20 MA |
| Actuator | Linear Or Rotary |
| Acting | Single Acting Or Double Acting |
| Customized Support | OEM |
| Diagnostics | Without |
| Warranty | 1 Year |
Positioners can be attached to pneumatic control valves to enable precise and accurate control of valve position. These devices come in two types: single-acting and double-acting positioners.
A single-acting positioner is designed to work with a spring-return actuator. It adjusts the position of the valve by modulating the air pressure that is supplied to the actuator from one side while venting the opposite side. This causes the actuator to extend or retract, thereby moving the valve to the desired position.
A double-acting positioner, on the other hand, is designed to work with a double-acting actuator. This type of positioner controls the flow of air to both sides of the actuator, allowing for more precise control over the position of the valve. It is generally used in applications where very precise control is required, such as in the chemical or process industries.
Overall, both single-acting and double-acting positioners offer improved accuracy and control over pneumatic control valves. By attaching a positioner to the valve, operators can more easily and efficiently adjust the valve position to suit their needs.
The Control Valve Positioner is a precision device that ensures accurate and reliable positioning of control valves for optimal process control. Our product technical support and services include:
We are committed to providing our customers with the highest level of support and expertise to ensure the optimal performance of our Control Valve Positioner.
Product Packaging:
The Control Valve Positioner product is carefully packed in a sturdy cardboard box to ensure that it arrives in perfect condition. Inside the box, the product is protected with bubble wrap and foam inserts to prevent any damage during transit. The box also includes a user manual and a warranty card.
Shipping:
We offer free shipping for the Control Valve Positioner product to all locations within the United States. Orders are processed within 24 hours of receipt and shipped via standard ground shipping. Delivery times vary depending on the destination, but typically take between 3-7 business days. Expedited shipping options are also available for an additional fee.
