Level A Suit Testing

Level A Suit Testing / Pressure Testing

Verifying the functionality of encapsulating Level ‘A’ Suits involves two crucial inspections: Visual Inspections and Air Pressure Tests. These suits require inspections upon receipt from the manufacturer and after each use. Additionally, monthly visual inspections and annual air pressure tests are essential.

Our personnel will conduct visual inspections and pressure tests on the suits in accordance with ASTM F1052-14 (American Society for Testing and Materials) Standards. Subsequently, they will repack the suits into their bags, complete the tags, and provide the necessary documentation paperwork.

Procedure listed below:

Visual/Physical Interaction

  1. Verify Inspection tag on bag matches the serial number in the suit.
  2. Fill out summary sheet and individual check list for suit testing.
  3. Look at the suit closely, checking for missing or damaged parts (Valve diaphragm, gloves, zipper pull and internal belt).
  4. Check valve diaphragm installation closely to be sure that the positioning groove on the diaphragm locking stem is properly positioned into the valve housing.
  5. Carefully remove the outer cover and the rubber diaphragm from each exhaust valve.
  6. Examine diaphragms that are not scheduled for replacement for cracks or deterioration. Replace damaged or deteriorated diaphragms and note on individual check list for suit testing.
  7. Look for holes and tears in the fabric.
  8. Look for wear, abrasion or delamination of seams.
  9. Check the gloves and booties for tears or abrasions. Pull on the boots and gloves to make sure that they are firmly attached.
  10. Check the lens for cracks, deep scratches or discoloration.
  11. If Level A suit passes visual inspection lubricate zipper and close for pressure test.

Pressure Testing

  1. Choose the correct connectors to fit the valves of the garment being tested.
  2. Wet adapter sealing surface with spray soap solution.
  3. From outside of the garment, firmly push each connector into an exhaust valve from which the diaphragm has been removed. Twist the adaptor clockwise if applicable approximately 1/8 turn to lock it in place.  DO NOT FORCE.  If you do not lock the adapter in place, it will not create a seal, and the garment will not maintain pressure. Forcing these connectors can permanently damage the exhaust valve.
  4. Check dial calibration of gauge. Needle position should be zero.  Adjust if necessary. 
  5. Connect the inflation hose and sensing hose to the appropriate exhaust valve connector.
  6. Pressurize suit to between 5 & 6 inches of water. Stop air to suit. Do not overinflate garment.
  7. Let the suit remain at a pressure of 5-6 inches water gauge pressure for at least one minute.
  8. Check connectors for leaks with soap solution.
  9. Set a timer for 4 minutes.
  10. Reduce the air pressure in the suit to 4 inches of water /close air supply valve.
  11. Start the timer. Do not touch or move the suit during the test period.
  12. At the end of 4 minutes read the pressure gauge. Record ending pressure on individual testing sheet.  The garment is considered to “pass” if the pressure remains at or above 3.2 inches (80%) after 4 minutes. 

Returning Inspected Garment to Service

  1. Disconnect the inflation and sensing air hoses from the garment and from the test kit.
  2. Open the garment closure completely.
  3. Remove the connectors from the exhaust valve bodies.
  4. From the outside of the garment, replace the exhaust valve diaphragms.
  5. Replace the exhaust valve covers.
  6. Fold the garment. Ensure the face shield is as flat as practical
  7. Place garment in storage bag.
  8. Fill out inspection tag with the date, initials of the person who tested and inspected the garment. Record the PASS or FAIL of the VISUAL and PRESSURE tests on summary sheet.  Return the user manual to the bag.
  9. Attach filled out tag to suit bag with zip tie.


Event Category:
Level A Suit Testing


AMS Industries, Inc. – Corporate Headquarters
9341 Adam Don Pkwy

Woodridge, IL 60517