Frequently Asked
Questions

Our products are mainly selected according to valve type, mounting method, and explosion-proof requirements.

• 1 Series: Suitable for top-mounted valves such as angle seat valves, diaphragm valves, and T-type valves.
• IP Series: Suitable for single-seat valves, butterfly valves, and ball valves.
• IP6000: Intrinsically safe explosion-proof type.
• IP6000d: Flameproof explosion-proof type.

For accurate selection support, please contact our sales team.

The selection depends on the actuator type of your valve.

• Single-acting positioner: Used for single-acting pneumatic actuators, usually with spring return.
• Double-acting positioner: Used for double-acting pneumatic actuators, where air is supplied to both sides of the actuator.

In simple terms, choose the positioner type according to whether your valve actuator is single-acting or double-acting.

If you are not sure, please share the actuator nameplate or valve photos with our sales team for selection support.

Our valve positioners support 4–20mA analog signal as the standard control signal.

• IP6000 / IP6000d: Optional HART communication is available.
• IP6500: Supports PROFIBUS PA fieldbus communication.

If your project has specific communication requirements, please share the control system or project specification with us for confirmation.

After installation, connect the air supply and 4–20mA signal to the positioner.

1. Press and hold the “▶” button for 3 seconds to enter the menu.
2. Select “INITA”.
3. Press and hold the “●” button for 3 seconds.

The positioner will automatically detect the valve stroke, direction, and optimize control parameters.

When the display shows “FINISH”, press the “●” button to exit.

Some models also support one-key auto tuning by pressing and holding the “O” button for 3 seconds.

Valve position oscillation is usually caused by one or more of the following factors:

• Unstable air supply pressure
• Pipeline or valve vibration
• Dead zone setting too small
• Excessive actuator friction
• Control gain set too high

We recommend performing automatic tuning again and checking the air supply quality and mechanical condition of the actuator.

If the issue continues, please contact our technical support team with valve and actuator details for further analysis.

It depends on the selected fail action configuration.

• Fail-safe: The valve returns to the preset spring position after power failure.
• Fail-freeze: The valve remains at the position where the power failure occurs.

The default configuration is fail-safe unless otherwise specified.

IP6000 and IP6000d can also support fail-freeze function under power failure, air failure, and signal failure conditions.

Please confirm your fail action requirement before ordering.

Our valve positioners are certified for various international industrial and hazardous area requirements.

• SIL3 Functional Safety Certification
• ATEX Intrinsically Safe and Flameproof Certification
• IECEx International Explosion Protection Certification
• CE Certification
• EAC Certification
• RoHS Compliance

The IP6000 Series meets both SIL3 and ATEX Ex ia IIC T6 requirements, making it suitable for most chemical, oil & gas, and industrial automation applications worldwide.

Please contact us if you need specific certification documents for your project.

You can submit your project requirements through our website contact form or contact our sales team directly by email.

To help us recommend the correct model, please provide the following information whenever possible:

• Valve type
• Stroke length or rotation angle
• Single-acting or double-acting actuator
• Explosion-proof requirement
• Communication protocol requirement
• Quantity

Our engineering and sales team will review your application and reply within 24 hours.

A 4–20 mA signal is an analog current signal commonly used to transmit control commands or process variables. HART adds bidirectional digital communication on top of the 4–20 mA signal, allowing access to device configuration, diagnostics, calibration, and status information without interrupting the analog control signal.

Yes. A HART-capable valve positioner can continue normal valve positioning and control using the standard 4–20 mA signal even when HART communication is not used.
Without HART communication, the positioner can still perform its basic control functions, but remote access to digital features such as device configuration, diagnostics, status monitoring, and parameter adjustment may not be available.

Normally, no.
In a point-to-point installation, HART communication uses the same pair of wires as the standard 4–20 mA signal, so separate communication wiring is generally not required. However, the loop must have sufficient impedance for reliable HART communication. If the existing loop resistance is too low, additional resistance may be required.

A common cause is insufficient loop resistance or an incompatible device in the communication loop.
Check whether the total loop impedance meets the HART communication requirements and whether the DCS I/O card already provides the necessary resistance. Also verify the wiring, power supply, and communicator connection.
For intrinsically safe installations, confirm that the safety barrier or signal isolator is HART compatible, as an incompatible barrier or isolator may prevent HART communication.

Yes, if these functions are supported by the valve positioner and the HART host system.
Depending on the device, HART communication can provide access to functions such as calibration, parameter adjustment, valve position and device status monitoring, alarms, and diagnostic information.
However, HART does not eliminate the need for physical maintenance. Mechanical mounting adjustments, pneumatic leakage checks, linkage problems, air supply issues, and other physical faults still require on-site inspection.

A smart valve positioner controls the position of a pneumatic control valve by comparing the position requested by the control system with the actual valve position.
It continuously adjusts the pneumatic pressure supplied to the actuator to minimize any difference between the requested and actual position. Depending on the model, smart positioners may also provide automatic calibration, digital communication, status monitoring, and diagnostic functions.

A conventional valve positioner controls valve movement using pneumatic, mechanical, or analog mechanisms. A smart valve positioner adds microprocessor-based control and electronic feedback for more precise and configurable valve positioning.
Depending on the model, smart positioners may also provide automatic calibration, digital communication, status monitoring, and diagnostic functions that are not typically available with conventional positioners.

No.
An I/P converter primarily converts an electrical current signal, such as 4–20 mA, into a proportional pneumatic pressure signal.
A smart valve positioner performs closed-loop valve position control. It measures the actual valve position, compares it with the requested position, and adjusts the pneumatic output to the actuator to minimize the difference.
Depending on the model, a smart valve positioner may also provide automatic calibration, digital communication, status monitoring, and diagnostic functions.

Yes.
Smart valve positioners can be used with both linear and rotary valve actuators, provided the positioner and mounting arrangement are compatible with the application.
The mounting hardware, travel or rotation range, actuator type, pneumatic output configuration, and feedback mechanism must match the specific valve and actuator.

Most smart valve positioners use a 4–20 mA analog signal as the control input from the DCS or control system.
Depending on the model, digital communication such as HART may be superimposed on the 4–20 mA signal for configuration and diagnostics, while other positioners may use digital fieldbus protocols such as PROFIBUS PA.
The required signal and communication protocol should always be confirmed for the specific positioner model and control system.

To select a suitable valve positioner, information about the valve, actuator, control system, air supply, operating environment, and required functions should be confirmed.
Key information typically includes the actuator type, linear travel or rotary angle, single- or double-acting operation, control signal, communication requirements, supply pressure, mounting interface, hazardous-area requirements, position feedback, and environmental conditions.
Providing these details helps ensure that the positioner is compatible with both the actuator and the control system.

Actuator type is an important factor when selecting a valve positioner because the positioner must match the actuator’s motion, operating mode, and mounting arrangement.
For linear actuators, the positioner must be compatible with the required valve travel and feedback mechanism. For rotary actuators, it must support the required rotation angle and mounting interface.
It is also necessary to confirm whether the actuator is single-acting or double-acting, as this determines the required pneumatic output configuration of the positioner. Actuator size, air volume, and required operating speed may also affect the required air capacity.

A volume booster may be required when the valve actuator has a large air volume or when faster opening and closing speeds are required.
The pneumatic output capacity of the valve positioner should first be compared with the actuator volume and required stroking time. If the positioner alone cannot supply or exhaust air quickly enough, a volume booster can be installed to increase pneumatic flow to and from the actuator.
Proper booster adjustment is important, as excessive gain or incorrect bypass adjustment may cause valve hunting or unstable control.