In food, beverage, pharmaceutical, and other hygiene-sensitive industries, production equipment requires frequent high-pressure washing.
Traditional industrial push buttons often fail under repeated exposure to water and chemical detergents — contact oxidation, LED failure, button sticking.
The result? Unplanned downtime and skyrocketing maintenance costs.
We recently worked with a leading liquid food filling line manufacturer in China, providing them with a 22mm metal push button series that completely solved these problems.
Below is a detailed technical review and real-world case study.
1. Customer Background & Challenges
Customer Type: OEM of liquid food filling lines
Application: Operator panels on filling machines — washed with high-pressure water 3 times daily
Previous Pain Points:
Inadequate waterproof rating (IP65 only) — moisture ingress caused LED short circuits
Severe contact erosion under inductive load (driving 24V DC intermediate relays, 0.8A)
Chrome-plated housing showed rust stains within 6 months — damaged brand image for export
2. Why This Metal Button Series?
We recommended our 22mm metal push button series (IP67, customizable to IP68) based on the following technical matches:
✅ 1. Waterproof Rating: IP67 at the Button End
Parameter: Waterproof rating: IP67 at the end of the button (Customizable IP68)
The customer’s washdown pressure reaches 0.3MPa. IP67 guarantees immersion resistance up to 1 meter for 30 minutes.
👉 Actual Value: No more protective covers. Improved operator experience. Zero waterproof-related complaints since mass production.
✅ 2. Inductive Load Lifetime: DC-13: 110V 1.25A
Parameter: *Inductive loads: DC-13:110V 1.25A*
The control circuit uses 24V DC intermediate relays — a typical inductive load generating back EMF during switch-off.
Our Silver Tin Oxide alloy contacts provide 3x better arc resistance than standard Silver Nickel contacts.
👉 Actual Value: Electrical lifespan tested > 500,000 cycles. Customer switched from “quarterly button replacement” to “maintenance-free for machine lifecycle.”
✅ 3. Housing Material: SUS304 Stainless Steel
Parameter: *Housing material: SUS304 / Brass nickel-plated / Aluminum alloy anodized*
Export to the EU requires 72-hour salt spray test certification.
We recommended SUS304 housing as standard. Actual test passed 96 hours with zero red rust.
👉 Actual Value: Helped the customer pass CE certification smoothly and win a major order from Germany.
3. Technical Configuration – As-Built Selection Sheet
| Selection Item | Customer Requirement | Our Configuration |
|---|---|---|
| Mounting Hole Dia. | 22mm (industry standard) | ✅ 22~22.1mm |
| Operation Mode | Momentary | ✅ Self-resetting |
| Contact Configuration | 1NO1NC | ✅ 1NO1NC |
| LED Voltage | 24V DC | ✅ 24V DC |
| Illumination Color | Green (Run) / Red (Fault) | ✅ Green / Red |
| Terminal Style | 2.8×0.5mm quick-connect | ✅ 2.8×0.5mm (switch & LED) |
| Button Material | Corrosion-resistant | ✅ PC + SUS316 |
| Certification Required | CE, RoHS | ✅ Full documentation available |
4. Customer Feedback & ROI
“Since switching to this push button series in Q3 2023, we’ve shipped over 300 machines. Zero button-related complaints. The old problem of ‘customer receiving brand-new machines with dead LEDs’ is completely gone.”
— Electrical Supervisor, Customer Facility
Cost-Saving & Efficiency Metrics:
Buttons per machine: 12 → Annual procurement volume: 3,600+ pcs
After-sales repair rate: Dropped from 8.3% to 0.6%
Average after-sales cost saving: ~$60 per machine
5. Summary: What Other Applications Fit This Button?
Beyond food machinery, this series is highly suitable for:
🔧 EV Charging Stations — High ingress protection + long electrical life
🔧 Chemical Valve Control Panels — Corrosion-resistant housing + inductive load capability
🔧 Marine & Military Equipment — Wide temperature range (-30℃~85℃) + IP67
🔧 Medical Devices — Frequent disinfection + multi-color status indication
📌 If you are looking for push button solutions for “high-humidity, high-cycling, high-aesthetic” industrial applications, contact us for samples and 3D drawings.
👉 Comment “BUTTON” below or DM us — get your FREE selection guide + CE certification package.
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