Spray trigger

When sourcing spray triggers, focus on the neck finish size (commonly 28/400, 28/410, or 24/410) to ensure compatibility with your bottles. Evaluate the dosage output, typically ranging from 0.8ml to 2.2ml per stroke, depending on whether the application is for fine misting or heavy-duty cleaning. Additionally, check the dip tube length and ensure it includes a filter mesh at the end to prevent clogging from particulates.

Material selection is critical for chemical resistance. Most triggers use Polypropylene (PP) for the body, but the internal gaskets and O-rings must be chosen based on the liquid's pH level. Use Viton seals for harsh chemicals or acid-based cleaners, and NBR or EPDM for general-purpose water-based liquids. Always request a chemical compatibility test report from the supplier to prevent spring corrosion or seal failure.

Prioritize triggers with an adjustable nozzle that switches between 'Mist', 'Stream', and 'Off' positions. For professional or industrial use, look for 360-degree spray capability, which allows the trigger to function even when held upside down. If the product is intended for household use, ensure the supplier offers Child-Resistant (CR) locking mechanisms to meet safety compliance standards.

A reliable spray trigger should pass a leakage test (vacuum test at -0.05Mpa for 5 minutes) and a priming test, where the liquid should be discharged within 3 to 8 strokes. Furthermore, the fatigue life of the spring should exceed 3,000 to 5,000 actuations without loss of tension. Ensure the supplier follows ISO 9001 standards and provides a pre-shipment inspection report covering these metrics.

Spray triggers are prone to breakage if not packed correctly. Insist on double-wall corrugated export cartons and the use of inner polybags to prevent dust contamination. To avoid 'accidental discharge' or breakage of the trigger lever, ensure the triggers are packed in orderly layers with cardboard dividers rather than bulk-dumped into a box. For large orders, palletization with shrink wrap is mandatory to ensure stability during sea freight.

Focus on tooling and mold ownership if you require a custom design. For standard models, negotiate based on weight and material grade (virgin vs. recycled PP). You can often achieve a 5-10% price reduction by increasing the order to a full 20GP container or by committing to an annual volume contract. Always ask for the sample fee to be credited toward your first mass production order.

To ensure transaction security, utilize the Secured Trading services provided by Made-in-China.com, which offer payment protection and ensure funds are only released upon proof of shipment. Avoid making full payments upfront; a standard 30% deposit and 70% balance against the Bill of Lading (B/L) is the industry norm. Always verify that the supplier's bank account name matches the company name on their business license.

Verify the HS Code (typically 842489) to determine import duties in your region. Ensure the supplier provides a Certificate of Origin (e.g., Form E or CO) to take advantage of preferential tariffs under trade agreements. For shipping, compare FOB (Free On Board) and CIF (Cost, Insurance, and Freight) terms; FOB is generally recommended for experienced buyers as it allows for better control over local port charges and logistics providers.