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• The air flow control system specifications as listed below.
  

1. Supply motorized damper and return motorized damper, in order to control the amount of air flowing in and out of the Sampling Booth and maintain the pressure status of the room to be in the determined range during the opening/closing of Sampling Booth.
2. The design support Supply air pipe : SA from the HVAC (heating, ventilation, and air conditioning) system to provide cool air into the Sampling Booth. It also come with a set of CAV (constant air flow control unit) at the supply air pipe, in order to control the constant amount of cool air provided from the HVAC to Sampling Booth and to dissipate the accumulated heat from the usage of fan.
   

• The air circulation within the Sampling Booth specifications as listed below.

1. Supply fan installed on top of the HEPA filter sheet, and also come with HEPA filter altogether.
2. The supply fan is an EC motor of a Centrifugal fan type, which is automatically compensate the wind speed within the working area of the Sampling Booth to remain in suitable range in the case where the blockage of HEPA filter or the turbulent air flow occurs eventually after the usages of the Sampling Booth. The supply fan is designed by prioritizes the maximum efficiency of the HEPA filter operation.
3. Exhaust fan located behind the ULPA air filter, and also comes with ULPA air filter altogether.
4. The exhaust fan is an EC motor of a Centrifugal fan type, which is automatically compensate the wind speed within the Sampling Booth, in the case where the blockage of ULPA filter occurs eventually after the usages of the Sampling Booth. The exhaust fan is designed by prioritizes the maximum efficiency of the ULPA filter operation.
5. Return fan installed on top of the Pre-filter sheet and Bag filter, automatically compensate the wind speed within the Sampling Booth, in the case where the blockage of Bag filter occurs eventually after the usages of the Sampling Booth.

• The air filtration designed with 4 steps, specifications as listed below.

1. The air within the work area of Sampling Booth is filtered with Pre-filter ​of G4 grade or better, to extend the service life of the HEPA filter.
   
2. The filtered air from Pre-filter is re-filtered with an air filter bag of F8 ​type or better.
   
3. The air that is filtered with the Bag filter entering the Sampling Booth ​is filtered with HEPA filter of H14 grade that is qualified to filter the air ​of not exceeding 0.3 Micron size for not less than 99.995 percentage or ​better.
   
4. The air that is blown out of the Sampling Booth is filtered with at least ​2 sheets of ULPA filter of U15 grade that is qualified to filter the air of ​not exceeding 0.12 Micron size for not less than 99.9995 percentage or ​better.
   
5. The filters is designed to be easily replaceable from underneath the ​supply fan, without having to relocate the fan, for the ease in ​maintenance.
   

• The Control Booth come with visual device to display the operation results of the supply motorized damper and for the return motorized damper with specifications as listed below.

1. An adjusting button to immediately adjust the percentage error occurred from the annual verification or calibration process on-site, in case the results of the percentage error exceeds the acceptable criterion.
   
2. A limited access to the digital pressure gauge adjustment or configuration of the Sampling Booth.
3. Import-export data portal of RS485 type and portal of LAN Ethernet type on the Sampling Booth controller.
4. Support the data import-export to the Building Automation System (BAS) of Modbus Protocol type, with the important parameters for data recording (21 CFR Part 11) as followed;

- Pressure drop of the Bag filter, HEPA filter, and ULPA filter sheet.

- The supply motorized damper opening/closing and the return motorized damper opening/closing in percentage.

- Operation status of the fan and the percentage of the fan operation

- Status of air filter blockage notification, HEPA air filter sheets, and ULPA air filter sheets, and pressure drop values across HEPA and ULPA air filter bags, HEPA air filter sheets, and ULPA air filter sheets

• The Control Booth is installed in the work area of the Sampling Booth to allow the users to have a clear vision of the alerts or notifications of abnormal operation at the front of the Sampling Booth. The abnormalities at least include the dysfunction of fan and the blockage status of the Bag filter, HEPA filter, and ULPA filter sheet.

• The control Booth have digital pressure gauge with the specifications as listed below.

1. Have an adjusting button to immediately adjust the percentage error occurred from the annual verification or calibration process on-site, in case the results of the percentage error exceeds the acceptable criterion.
2. The digital pressure gauge is installed in front of the Control booth to notify the pressure drop values of Bag filter, HEPA filter, and ULPA filter to the users.
3. A limited access to the digital pressure gauge adjustment or configuration of the Sampling Booth.

• The Sampling Booth come with a portal for the release of testing substance and a ​portal for concentration checking of the released testing substance with regard to ​the HEPA/ULPA filter Leakage Test by not releasing the testing substance ​afterwards.

• The work area within the Sampling Booth have a pop-up 3-pin electric supply ​socket ports.

• support the electrical system of 380 – 400 V at the frequency of 50 Hz.

• The Sampling Booth could be operate smoothly as usual after a power shortage ​or power outage occur, with the configured parameters remain unchanged.
  

• There is a lighting system that can supply not less than 500 Lux within the Sampling Booth.
  

• The operation of the Sampling Booth not cause more than 85 dB of noise.

• The Sampling Booth properly installed inside the Sampling room and able to function accordingly to the desired tasks.

• The design, manufacture, installation, and qualification is done accordingly to the Notification of the Ministry of Public Health RE: Determination of specifications in regulations of modern medicine manufacture and adjusting the criterion and methodology used in traditional medicine manufacture, issued under the Drugs Law, B. E. 2559 or ISO14644-1, ISO14644-3, ISPE or other associated standards.