Detail
VIRA D-SK 3000-2 is a new-generation modulating level control and alarm system for steam boilers. The system consists of the D-SK 3400 24VDC modulating level controller with touchscreen interface, the SD 3400 capacitive level probe and the SKV 3400 2-way proportional feedwater control valve. Together, these components provide precise proportional feedwater control and level alarm functions.
D-SK 3400 Touchscreen Controller
The D-SK 3400 controller provides the control, monitoring and alarm functions of the system. Its touchscreen interface gives direct access to operating information, control settings and calibration menus. Operators can adjust the proportional band and access dedicated valve-calibration and probe-calibration menus during commissioning and operation.
Project-Specific Probe and Valve Selection
The SD 3400 capacitive level probe is manufactured in the length required for the project. The SKV 3400 2-way proportional feedwater control valve is selected according to the application requirements and is available in PN 16, PN 25 and PN 40 pressure classes.
Selectable Control and Feedback Options
The D-SK 3400 controller is available with either 3-step control or 4-20mA control, selected according to the valve actuator and project requirements. It can receive valve-position feedback from either a potentiometer or a 4-20mA feedback signal.
Level Information, Drive Output and Alarms
The controller provides a 4-20mA analogue output for level information and a 4-20mA drive output for proportional valve control. High and low water-level alarm functions support operator awareness of abnormal boiler-water levels.
Installation Options
The D-SK 3400 controller operates with a 24VDC supply and is available in DIN-rail and panel-mount versions. This provides flexibility for integration into boiler control panels and new equipment designs.
Key Features
- D-SK 3400 24VDC modulating level controller with touchscreen interface
- SD 3400 capacitive level probe, manufactured to project-specific length
- SKV 3400 2-way proportional feedwater control valve
- PN 16, PN 25 and PN 40 valve options, selected per project
- Choice of 3-step or 4-20mA control
- Potentiometer or 4-20mA valve-position feedback input
- 4-20mA analogue level-information output
- 4-20mA drive output for proportional valve control
- High and low water-level alarm functions
- Proportional band adjustment
- Valve and probe calibration menus
- DIN-rail and panel-mount controller options
Technical Support and Quotation
Contact VIRA for project-specific probe and valve selection, technical documentation and quotation support.
| Supply Voltage | 24 VDC |
| Control Modes | Configurable three-step or 4–20 mA modulating feedwater control |
| Valve Feedback | Potentiometer or 4–20 mA valve-position feedback |
| Level Signal | 4–20 mA analogue level output |
| Alarm Functions | High-level and low-level alarms |
| Adjustment Functions | Probe calibration, valve calibration and proportional-band adjustment |
| Display | Touchscreen display |
| Mounting | Panel-mounted or DIN-rail mounted |
| Measuring Principle | Capacitive level measurement |
| Application | Continuous boiler-water level measurement for modulating control |
| Probe Length | Produced to the required insertion length for the application |
| Included Accessory | AY 3400 pre-amplifier included |
| Valve Type | Two-way modulating feedwater control valve |
| Control Duty | Modulates feedwater flow according to the boiler-water level signal |
| Pressure Class | PN 16, PN 25 or PN 40, according to project requirements |
| Configuration | Valve size and operating configuration selected for the application |
