ANALOG CONTROL
Three standard signals — one input
4...20 mA, 0...20 mA and 0...10 V. Adjustable range, direct or reverse output.
0100%
VALMA
LPOS-S-V1
LPOS-S-V1
Every stroke is under control
Linear electro-pneumatic positioner for precise control of pneumatic valve actuators
PRODUCTIONMade in Russia
Light ringVisual feedback
Control signal4...20 mA / 0...10 V
Digital interfaceRS-485 Modbus RTU
Valve strokeup to 45 mm
Power supply24 VDC, max 5 W
What is a positioner for?
Precise valve control on every command
The sensor measures temperature at the heat exchanger outlet and transmits the data to the controller. The controller compares the measured temperature with the setpoint.
When adjustment is needed, the controller sends a command to the positioner. The positioner precisely adjusts the valve stem to regulate the process flow.
Features
Everything you need to control the valve
DIGITAL INTERFACE
RS-485 / Modbus RTU
Control, parameter setting, and integration into a process automation system.
INDICATION
Operation status in real time
Light ring gives instant feedback on device state.
FEEDBACK
Actual position control
The measurement error is less than ± 0.5%. Repeatability is 10 microns.
COMMISSIONING
Automatic configuration
Auto-tuning adapts to your valve characteristics.
LOCALLY
Setting with buttons on the housing
Basic parameters and manual operation are available directly from the front panel of the positioner.
DIAGNOSTICS
Safe state
Control of internal errors and input signals.
CHARACTERISTICS
Linearization
Setting the valve response to the input signal.
Modifications
Basic or Advanced
Both versions support analog control and Modbus RTU. The difference is in the additional inputs and outputs.
BASIC VERSION
LPOS-S-V1B
For basic analog or digital valve position control.
Position control
Automatic configuration
Manual operation
Light indication
Stem stroke: up to 45 mm
- AI 4…20 / 0…20 mA / 0…10 V
- RS RS-485 Modbus RTU
- AO Analog output
- DIO 2 DI + 2 DO
ADVANCED VERSION
LPOS-S-V1A
When external feedback and additional digital signals are needed.
Position control
Automatic configuration
Manual operation
Light indication
Stem stroke: up to 45 mm
- AI 4…20 / 0…20 mA / 0…10 V
- RS RS-485 Modbus RTU
- AO 4…20 / 0…20 mA / 0…10 V
- DIO 2 DI + 2 DO, NPN / PNP
Let's find the positioner that fits your valve
Already have a valve?
Let's find the positioner that fits your valve
Please send the model, a photo of the label, and a general view of the valve. When we recognize the equipment, we can often provide an initial recommendation. If compatibility cannot be determined from the photo, we will request dimensions, additional data, or arrange a site visit. Either way, just contact us — the rest is on us.
Check compatibility A photo helps to start the selection, but the final decision sometimes requires measurements or a closer look at the equipment.
NEW ASSEMBLY
Ready-to-install control valve with positioner
Pre-configured and tested assembly: ASV-series valve, pneumatic actuator, and positioner in the required version.
Steam
Cold water
Hot water
DOWNLOADS
Documentation and files
General documents
Design and integration
FAQ
Frequent asked questions
What is a valve positioner?+
A device that receives a control signal, regulates the air supply to the pneumatic actuator, and drives the valve to the required position.
Which valves is the positioner suitable for?+
As standard — for VALMA ASV-series valves. It can be used with normally closed (NC) valves from other manufacturers with a stroke of 5...45 mm and a full stroke time of up to 30 seconds. The design and adapter must be checked.
Which control signals and interfaces are supported?+
4...20 mA, 0...20 mA and 0...10 V, and RS-485 Modbus RTU.
How does V1A differ from V1B?+
V1A additionally has an analog output (AO), two digital inputs (DI), and two digital outputs (DO).
Can I install a positioner on an existing valve?+
In some cases, yes. The valve type, the stem stroke, the pneumatic actuator design, and the mounting adapter must be checked.
Can I order a ready-to-install valve with a positioner?+
Yes. You can select a complete kit: VALMA ASV-series valve, pneumatic actuator, and positioner — pre-configured and tested.
Equipment selection
Let’s start with your application
Not sure about the required specifications? Send us a photo of the valve label or describe your application.
PHONE
+86 131 2275 5240
Call us
EMAIL
order@elhart.net
Write to us