What is a 28mm Trigger Sprayer?

It's a hand-actuated spray pump that fits onto a bottle with a 28mm neck finish. The user pulls a trigger to create a manual piston action, drawing liquid up through a dip tube and expelling it as a spray through a nozzle. The "28mm" refers to the outer diameter of the bottle's neck thread.

• Common Notation: 28-410. The "410" denotes the specific thread profile and cap style.

• Spray Pattern: Primarily produces a stream or a fine-to-medium mist, depending on the nozzle insert (actuator).   

  Key Characteristics & Components

  1. Closure Size: 28mm. This is a medium-sized neck, extremely common for bottles ranging from 8oz (240ml) to 32oz (1L), such as standard spray cleaner bottles.

  2. Output: Varies by design, but typically dispenses 2ml to 5ml per full trigger pull.

  3. Materials:

     • Body/Trigger/Closure: Polypropylene (PP) or Polyethylene (PE).

     • Internal Components: Stainless steel spring, glass or plastic bead for the valve, various gaskets.

     • Dip Tube: Flexible polyethylene, cut to length.

     • Common Applications

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       The 28mm trigger is the workhorse for household, automotive, and garden products.

       Household Cleaners: All-purpose cleaners, glass cleaners, disinfectant sprays, degreasers.

       Automotive: Tire shine, interior cleaners, engine degreasers, detailer sprays.

       Garden & Plant Care: Insecticides, herbicides, fertilizers, foliar sprays.

       Personal Care & Pet Care: Detangling sprays, coat shines, some disinfectant sprays.

       Industrial: Light-duty lubricants, release agents.

       Actionable Checklist When Ordering

       1. Confirm Neck Size: Ensure your bottle is truly 28-410.

       2. Specify Chemical Compatibility: Declare your full formula to your supplier. "Chemical-resistant" is not a generic term; specify the chemicals.

       3. Request Spray Nozzle Type: Mist, stream, or adjustable?

       4. Ask About Locking: Do you need a twist-lock feature?

       5. Get Samples: Always test a sample with your actual product for:

          • Spray pattern consistency.

          • Trigger feel and durability.

          • Leakage from the collar or nozzle after use.

          • Chemical compatibility over time (run a stability test).

       In summary, the 28mm trigger sprayer is a versatile, cost-effective dispensing solution for a massive range of liquid products. Its success hinges on correctly matching it to your bottle and, most importantly, ensuring full compatibility with the chemical properties of your formula.