Monitoring And Maintaining Dispensing Booth Procedure

  • 02, 06, 2021

Dispensing booth (sampling booth or downflow hood) is a kind of purifying equipment, providing a safe environment for workers to handle raw materials. To ensure efficient operation of dispensing booth, inspection and maintenance should be carried out regularly. This article will identify the procedure for monitoring and maintaining dispensing booths. 

Dispensing booth is one of the most popular means of protecting workers handling dusty materials or engaging in activities that generate airborne particles. Dispensing booths' user-friendly working environment and the high levels of protection they provide have led to their widespread adoption in the chemical, food, healthcare, and other industries.

1. Dispensing booth monitoring 

Regular monitoring demonstrates that the unit is operating in accordance with established standards.

It provides invaluable historical data and enables prompt corrective action if necessary, and it is an integral part of a planned program designed to detect and handle deviations that could put operators at risk.

Daily visual checks such as checking for panel damage and failed lighting are a start point and can be done by the operator, who probably knows the dispensing booth better than anyone. 

Other routine checks should be carried out by competent technicians, which include:

  • Checking manometer readings are in the correct range
  • Static pressure readings
  • Checking there is no visible leakage
  • Filter system check

Keeping records is critical for demonstrating that the dispensing booth works as intended. Failures or deviations should be documented, reported, and addressed.

Your dispensing booth manufacturer will provide training for your maintenance team at the time of equipment handover.

Training should be tailored to accommodate these followed things:

  • Specialist maintenance operations outside of the company's in-house capability and scope
  • Dispensing booth performance levels
  • Activities performed within the dispensing booth

2. Dispensing booth inspection 

Run-to-failure maintenance is not suitable for dispensing booths. To maintain dispensing booth performance, a series of tests should be carried out by trained engineers.

  • Smoke tests confirm that airflow in the dispensing booth is flowing in the correct direction and not hampered by equipment placement.

Smoke tests should also demonstrate that smoke remains within the safe working zone and none flows into the outside area, indicating a risk to those in adjacent work zones and potential product contamination.

  • Airborne particle count testing is required where cleanroom classification verification is required in accordance with BS EN ISO 14644-1:1999. This is undertaken using light scattering instruments to determine clean area cleanliness.
  • One kind of test that should be done regularly is DOP (dispersed oil particulate) testing of high-efficiency particulate air (HEPA) filters. This test determines whether the filters meet the standards required for your operations.

The test ensures that all parts of the filter, including the seals and housing, are in good working order. The statutory requirement for testing intervals is 14 months, with tests performed in accordance with BS EN ISO 14644-3:2005 by competent test engineers.

3. Dispensing booth maintenance

A planned maintenance program can keep the dispensing booth safe to use while preventing equipment failure and production interruption.

Dispensing booth manufacturers should recommend service intervals, which should take into account Health, Safety & Environment guidelines, how your dispensing booth is used and how much product passes through it, and help determine the framework for a preventative and predictive maintenance schedule to meet your Health & Safety obligations.

4. Replacement 

Customers should purchase spare parts when ordering dispensing booth to ensure minimal downtime and optimum performance of the downflow booth.

Vietnam Cleanroom Equipment (VCR) specializes in providing cleanroom equipment for construction contractors. We provide high-quality products with competitive prices and large quantities nationwide. The equipment includes:

Differential pressure gauge, FFU Fan Filter Unit, Pass box, Clean room air filter, HEPA box, Clean booth, cleanroom steel door, Isolator cabinet, and other equipment

For details, please refer to Vietnam cleanroom equipment official website


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