Deaerator

                                                                                      Deaerator

Description

This equipment is adeaerator, model BTU-DA-1, used for rapid preparation of de‑aired water (deaerated water). The main unit is constructed from acrylic (PMMA) and removes dissolved gases from water under vacuum using a rotating deaeration mechanism. Main parameters:

• Production capacity: 16 L of de‑aired water per hour
• Deaeration purity: 0.6 ppm (very low residual dissolved gas content)
• Vacuum requirement: 750 mmHg (approximately -99.9 kPa, near absolute vacuum)
• Supplied with a vacuum pump (750 W oil‑free vacuum pump)

Test Standards (International)

• ASTM D1193(Standard specification for reagent water)
• ISO 3696(Water for analytical laboratory use)
• ASTM D1293(pH of water – indirect)
• Vacuum deaeration efficiency may referenceGB/T 12149(Determination of dissolved oxygen in industrial circulating cooling water), etc.

Typically, de‑aired water is used in geotechnical triaxial and permeability tests, and its quality requirements are indirectly specified by test standards such as ASTM D4767 and D5084.

Specification

Based on the screenshot:

Detail

• PMMA material– Transparent acrylic allows visual observation of the deaeration process; corrosion‑resistant and lightweight.
• Double‑layer rotating deaeration blades– Motor‑driven blades rotate under vacuum, increasing the water‑air contact area and accelerating gas release.
• Dynamic seal structure– Ensures the chamber remains leak‑tight under -100 kPa vacuum, maintaining high vacuum.
• Vacuum pump– 750 W oil‑free pump prevents oil vapour contamination, ensuring de‑aired water purity.
• Real‑time vacuum display– LCD shows current vacuum pressure for monitoring deaeration status.
• Timer– Sets motor running time; automatic start/stop without manual supervision.
• Silent castors– Easy to move and lock in place.

Application

• Geotechnical triaxial testing– Prepare de‑aired water for specimen saturation, back pressure saturation, and pore pressure measurement systems.
• Permeability testing– Provide de‑aired water as a permeant to avoid air bubbles blocking lines or affecting measurements.
• Consolidation testing– Saturate porous stones and lines.
• Unsaturated soil testing– Prepare de‑aired water for volume measurement in axis‑translation systems.
• General laboratory use– Any chemical or materials test requiring high‑purity de‑aired water.

Advantages

• High production capacity– 16 L/hour, meeting the daily needs of most laboratories.
• High deaeration purity– 0.6 ppm, superior to boiling or standing methods.
• High vacuum– 750 mmHg (-99.9 kPa), near absolute vacuum, thorough deaeration.
• Oil‑free vacuum pump– Avoids oil contamination, ensuring water purity.
• Transparent chamber– Visual observation of deaeration process.
• Double‑layer rotating blades– Improves deaeration efficiency.
• Reliable sealing– Dynamic seal structure, no leakage at -100 kPa.
• Easy operation– LCD vacuum display, timer for automatic control.
• Mobility– Lockable silent castors for easy positioning.

What To Choose

Select this equipment or compare with other methods based on laboratory requirements:

Process Flow

Example:Preparation of 16 L of de‑aired water

• Preparation
  • Check the vacuum pump (oil‑free type requires no oil change); connect the pump to the deaerator inlet.
  • Pour clean purified or distilled water into the pressure chamber (do not exceed the maximum fill line).
  • Close the top cover and ensure a good seal.

• Set parameters
  • Turn on the power and activate the LCD display.
  • Set the running time on the timer (e.g., 30 minutes, depending on water volume and vacuum level).
  • Monitor the vacuum pressure display; the target value should approach -99 kPa (approx. 750 mmHg).

• Start deaeration
  • Start the vacuum pump; the motor simultaneously drives the double‑layer rotating blades.
  • Under vacuum and agitation, dissolved gases (O₂, N₂, CO₂, etc.) escape as bubbles.
  • The vacuum level gradually increases (absolute pressure decreases) until stable near the set value.

• Timer completion
  • When the set time is reached, the motor and vacuum pump automatically stop.
  • Open the vent valve to return the chamber to atmospheric pressure.

• Water collection
  • Open the outlet line and collect the prepared de‑aired water into a sealed container (to prevent re‑dissolution of gases).
  • It is recommended to use the water immediately or store it sealed for a short period.

• Cleaning and maintenance
  • Drain any remaining water from the chamber and clean the interior.
  • Periodically inspect the seals and the vacuum pump.

Summary:The BTU-DA-1 deaerator is a high‑efficiency, high‑purity de‑aired water preparation unit. It features a transparent PMMA chamber, double‑layer rotating blades, and an oil‑free vacuum pump, achieving rapid deaeration at -100 kPa with a production capacity of 16 L/hour and a deaeration purity of 0.6 ppm. The LCD vacuum display and timer make operation easy. It is suitable for geotechnical triaxial, permeability, consolidation, and other tests requiring de‑aired water. Selection should be based on daily water consumption, purity requirements, and budget.