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ZRAY Debuts Stainless Steel Carton Erecting Machine (IP65/NEMA 4X, AISI 304, 20–25 CPM) for Wet and Washdown Environments | ZRAY

September 20, 2026

Washdown floors in food and beverage plants destroy a carbon-steel case erector in 12–18 months. Condensate, high-pressure rinse and caustic detergent attack every exposed fastener, and one corroded photo-eye bracket can halt a 20,000-bottle-per-hour line. ZRAY’s stainless steel carton erecting machine — model ZR-25S-SS — runs 20–25 cartons per minute at humidity above 85% and survives daily washdown at 60 °C, ≤5 bar, pH 2–12.

Material and Ingress Protection

Assembly Material / rating Notes
Frame & panels AISI 304 (316L option) 2.0 mm welded, bead-blasted, no paint
Control cabinet IP65 / NEMA 4X Stainless enclosure, silicone gasket
Motors & gearboxes IP66 Epoxy-coated, stainless shafts
Pneumatic valves 316 stainless bodies FRL bowl in 316, drainable
Fasteners AISI 316, button-head No exposed hex sockets
HMI & sensors IP67, stainless bezel Sealed membrane

Wet-Environment Design Details

  • No exposed threads or hex-socket recesses — button-head or countersunk fasteners eliminate bacterial niches.
  • Sloped top surfaces and drainage channels — no standing water on the frame.
  • Bottom drain ports — condensate and rinse water exit the base directly.
  • Food-grade H1 grease on all lube points (incidental-contact safe).
  • Watertight door switch on the service guard prevents a washdown cycle from energising an open panel.

Core Specifications

Parameter ZR-25S-SS
Speed 20–25 cartons/min
Carton L × W × H 200–500 × 150–400 × 120–450 mm
Board 3.0–7.0 mm, 3/5-layer, flute B/C/E (vertical)
Power 2.2 kW, 380 V/50 Hz 3-ph (220 V/60 Hz opt)
Air 0.5–0.6 MPa, ~95 NL/min
Sealing 50 mm tape head, hot-melt opt
Control Delta PLC + 7″ HMI
Ingress IP65 cabinet / IP66 motor / NEMA 4X

Stainless vs Carbon Steel: Life and Cost

Criterion Carbon steel AISI 304 SS
First cost 1.0× (baseline) 1.4–1.7×
Corrosion life 12–18 months in washdown 8–12 years
Annual repaint / re-coat Required None
Unplanned downtime High Negligible
5-year TCO Higher Lower

The stainless premium pays back in roughly two corrosion-related stoppages.

PLC Alarm Codes and Field Troubleshooting

Code Description Typical cause Field action
AL-01 Vacuum below −55 kPa Clogged filter, cracked cup Replace filter, soap-test fittings
AL-02 Magazine empty Low carton stack Reload; set guides to board
AL-05 Tape head fault Tape run-out, damp blade Reload tape, dry/replace blade
AL-07 Safety circuit open Watertight door open Close guard, reset relay
AL-09 Air pressure low FRL iced or drained Drain trap, check 316 bowl
AL-10 Encoder / comm fault Moisture in connector Dry, re-seat, apply sealant

Post-Rinse Maintenance

Interval Tasks
Daily Drain FRL bowl; flush drain ports; wipe seals; verify 0.5–0.6 MPa
Weekly Inspect door gasket; check for pooled water; test E-stop
Monthly Lubricate lube points with H1 grease; torque stainless bolts
Quarterly Replace suction cups; verify IP seals; grease gearbox
Annually Insulation-test panel; re-level; full gasket set replacement

Model Selection for Wet Lines

For wet plants, the Single-Piece Case Erector family now includes a full stainless variant; the Products page compares the whole range. Both share the 0.5 MPa air architecture.

Get a Quotation for Your Packaging Line

Send us your carton size range, board grade and required CPM — our engineers will return a model recommendation, layout drawing and quotation within 24 hours.

Contact ZRAY: [email protected] · WhatsApp +86 13681839278

Want To Know More About Our Upgraded Machines?

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