Detail
The VIRA BS4-T Temperature-Compensated TDS Blowdown System is designed for steam boilers operating under variable temperature and pressure conditions. It monitors boiler-water conductivity and applies temperature compensation to support accurate, controlled surface blowdown.
Temperature-Compensated Conductivity Control
Changes in boiler-water temperature can affect conductivity readings. The BS4-T system compensates for temperature variation, helping operators maintain a more consistent TDS-control process without relying on a fixed operating temperature and pressure for calibration.
System Components
The system includes a BK 5000-T controller, a temperature-compensated BD 5400-T or BD 5600-T conductivity probe, a DG 5400 probe body and a BKV 5400 blowdown control valve. When conductivity exceeds the configured set point, the controller operates the valve to carry out controlled surface blowdown.
For Variable Boiler Operating Conditions
BS4-T is suitable for steam boiler applications where operating temperature and pressure vary during normal operation. Temperature compensation supports more reliable conductivity measurement and helps maintain the intended boiler-water quality.
Application Benefits
- Temperature-compensated conductivity measurement
- Controlled surface blowdown based on the configured set point
- Suitable for variable boiler temperature and pressure conditions
- Support for consistent boiler-water quality
- Reduced unnecessary losses of water, heat and treatment chemicals
Technical Support and Quotation
Contact VIRA for product selection, technical documentation and quotation support for your steam boiler application.
| Supply Voltage | 230 VAC |
| Control Functions | Conductivity set point, hysteresis, high-conductivity alarm, on-off valve control and calibration |
| Inputs | Conductivity probe, PT100 temperature sensor and ground |
| Outputs | Valve relay, alarm relay, 4–20 mA analogue conductivity signal and RS485 Modbus communication |
| Display & Operation | LCD display with Menu, Arrow and Enter keys |
| Installation & Protection | Panel-mounted PA enclosure, IP40 |
| Maximum Ambient Temperature | 55 °C |
| Process Connection | Threaded connection; BSPT option available |
| Probe Length | 500 mm standard; project-specific length specified at the time of order |
| Pressure Rating | PN40; maximum operating pressure 32 bar(g) |
| Temperature Limits | Maximum operating temperature 239 °C; maximum ambient temperature 75 °C |
| Integrated Sensor | PT100 temperature sensor |
| Nominal Size | DN20, DN25 and DN40 |
| Pressure Rating | PN40 |
| Body & Sealing | WCB carbon-steel body with metal-to-metal sealing |
| Actuation | Electric on-off or pneumatic spring-to-close actuator |
| Electrical Actuator Supply | 220 VAC; 24 VDC available on request |
| Operating Temperature | −10 to +230 °C |
| Sample Connection | Sample outlet at the bottom of the valve |
| Nominal Size & Pressure Rating | DN20, DN25 and DN40; PN40 |
| Operating Limits | Maximum operating pressure 32 bar(g); maximum operating temperature 239 °C |
| Body Material | Ductile cast iron or carbon steel |
