The balance container is a secondary instrument of the differential pressure type water level gauge. It is used in conjunction with a water level indicator or a differential pressure transmitter to measure water level, and can be used for alarm purposes. It can reflect the quality water level inside the steam drum under normal boiler operating conditions.

The TG-DP type single-chamber balance container produced by Sharpe is classified into medium pressure, high pressure, ultra-high pressure, subcritical, and supercritical pressure levels. These products have been serialized (special parameters can also be redesigned) and are used in conjunction with boilers. The selection can be based on the pressure and temperature of the medium inside the steam drum (or pressure vessel).

        The single-chamber balance container is formed by welding the cylinder body, steam drum connection pipe, and gauge pipe. In operation, the positive pressure head is led out from the balance container, and the length of the pressure guiding pipe should be greater than 1 meter to ensure that the water temperature inside the descending pressure guiding pipe is close to the ambient temperature. Similarly, the negative pressure guiding pipe should also be designed this way.  Additionally, a temperature transmitter is installed to correct the density of water in the pressure guiding pipe. Differential pressure, pressure, and ambient temperature are all input into the intelligent boiler steam drum water level gauge with a microprocessor as the core through transmitters. Simultaneously, the differential pressure signal representing the water level is corrected. 

Main Technical Parameters

•  Steam drum connection pipe specification: Ø28 × 4mm
  
• Specification of connection for differential pressure transmitter pressure guiding pipe: Ø16 × 3mm
  
• Working pressure: 1.0 ~ 21.5 MPa, can also be designed according to customer requirements
  
• Interface type: Welding
  
• Operating temperature: Saturated steam temperature or as per customer requirements
  

the TG-(B)SP type double-chamber balance container, with pressure levels including medium pressure, high pressure, ultra-high pressure, and subcritical. These products have been serialized (special parameters can also be redesigned) and are used in conjunction with boilers. Selection can be based on the pressure and temperature of the medium inside the steam drum (or pressure vessel), observation range, distance from the center of the water pipe to the normal water level , and distance from the steam-water interface to the center .

The compensating double-chamber balance container is assembled by welding components such as the cylinder body, positive pressure compensating pipe, negative pressure pipe, water cup, and funnel. During operation, the heat released by the condensation of saturated steam simultaneously heats the positive pressure compensating pipe and the negative pressure pipe. Additionally, the outer insulation of the balance container reduces heat loss, ensuring that the weight of the water inside the positive pressure compensating pipe is approximately equal to the weight of the water inside the steam drum (or pressure vessel) under any operating conditions.

Furthermore, due to the correct selection of the height of the positive pressure compensating pipe, regardless of how the pressure inside the container changes, the pressure variation in the positive pressure compensating pipe is equal to that in the negative pressure pipe. Therefore, the output differential pressure of the double-chamber balance container remains constant, indicating a consistent low water level. Once the water level changes, the output differential pressure changes accordingly, allowing timely indication of the water level inside the container. To improve the accuracy of measurement with the double-chamber balance container, the design emphasizes increasing the cross-sectional area of the positive pressure chamber (water cup) (the diameter of the water cup is greater than 100mm).

Main Technical Parameters

• Steam-water connection pipe, drain pipe specification: Ø28 × 4mm
  
• Specification of connection for differential pressure transmitter pressure guiding pipe: Ø16 × 3mm
  
• Working pressure: 1.0 ~ 15.5 MPa
  
• Interface type: Welding
  
• Operating temperature: Saturated steam temperature
  
• Steam-water connection pipe center distance: 600mm, 670mm, 1270mm