Stainless-Steel Passage Door for Seafood Processing
A humid processing passage needed practical access and a better response to incidental curtain displacement. SEPPES supplied a stainless-steel-framed door with a self-repairing curtain, two-sided pull-cord activation and sealed connections to the wall panels.
- Opening size
- 2,500 × 2,500 mm
- Frame & enclosure
- нержавеющей стали 304
- Curtain thickness
- 2.5 mm
- Project handover
- August 2026
Moisture, repeated access and wall-panel interfaces shaped the package.
The objective was a coordinated passage solution: review the material, traffic and partition detail together rather than treating the door curtain as the whole specification.
The Site Challenge
The internal passage served a seafood-processing facility in China, associated with frozen-product handling and low-temperature storage. Staff and materials moved frequently through the opening.
- The working environment was humid.
- The previous door had suffered damage during passage use.
- The replacement needed practical activation from both sides.
The SEPPES Response
The door package combined the structure, curtain behaviour and installation details needed at this opening.
- 304 stainless-steel frame, guide columns, head cover and control enclosure.
- Self-repairing curtain and nearby protective posts.
- Two-sided pull cords and sealing at the frame-to-wall-panel junction.
Each configuration detail addressed a different part of the brief.
The project opening measured 2,500 mm wide by 2,500 mm high. The specification included the control enclosure and the wall-panel finish as well as the door assembly.
| Component or feature | Selected for this project | What to consider for another opening |
|---|---|---|
| Frame, guides and head cover | 304 stainless steel. | Review moisture, cleaning chemistry and surface requirements together with the fabricator or door supplier. |
| Electrical enclosure | 304 stainless-steel control enclosure. | Specify enclosure protection, cable entries and installation position for the actual cleaning exposure. |
| Curtain and visibility | Blue 2.5 mm antistatic curtain with a transparent viewing window. | Confirm visibility and any required material or antistatic test documentation for the intended process. |
| Curtain guidance | Self-repairing arrangement for curtain re-insertion. | Review the permitted recovery conditions and what the operator should do after a collision or visible damage. |
| Активация | Pull-cord switches on both sides. | Check reach, approach route, trolley movement and the position at which an opening request is needed. |
| Installation interfaces | Protective posts and sealant at frame-to-panel gaps. | Agree fixing, impact-protection layout and perimeter finishing with the partition and installation teams. |
Separate material choice, cleaning exposure and temperature duty.
These are planning questions for a new project. They help avoid assuming that a frame grade or the name of a door family defines the whole operating capability.
Start with the Cleaning Method
Describe whether cleaning is by wiping, foam, spray or hose. Include the chemicals, concentration, temperature and frequency used at the doorway. Ask for the cleaning guidance and enclosure details that match that exposure.
Stainless-steel performance depends on grade, finish and design as well as the service conditions. Worldstainless’s food-industry guidance explains why material selection and cleanable design need to be considered together.
Describe Both Sides of the Opening
Provide the normal and lowest temperatures on each side, the humidity conditions and how long the door may remain open. Include defrost or cleaning periods if they change the doorway environment.
A passage within a cold-processing facility does not automatically have the same specification as a freezer entrance. If insulation, condensation control or a defined temperature rating is required, include it explicitly in the brief.
| Your main requirement | Review this configuration direction | Ask the supplier to confirm |
|---|---|---|
| A humid internal processing passage | Stainless-steel frame and suitable curtain, controls and wall interfaces. | Material scope, surface finish, cleaning guidance and the electrical enclosure arrangement. |
| Repeated accidental curtain displacement | A self-repairing or zipper-guided door arrangement. | The recovery conditions, required checks and the limits of the selected system. |
| A freezer or defined thermal boundary | A freezer-door configuration reviewed for the stated conditions. | Operating temperature range, insulation, seals and condensation-control requirements. |
Consider the approach route as well as the door opening.
The transparent window, activation points, curtain behaviour and protective posts should work with the same traffic pattern. Review them on a passage layout with the typical load shown.
Activation for the Actual User
The project used pull cords on both sides. For another passage, review whether staff, a trolley operator or a vehicle needs to request opening and where that request can be made comfortably before reaching the moving curtain.
If automatic activation is proposed, ask the supplier to review the detection area against adjacent movement so the door receives the intended requests.
Recovery Is One Part of the Brief
A self-repairing curtain is intended to reinsert into its guides under the conditions defined for the selected system. It can be useful where incidental curtain displacement is a recurring issue.
Keep collision avoidance, sight lines and protective-post positions in the traffic review. Agree the inspection and service response after impact; do not treat the recovery feature as permission to continue using visibly damaged equipment.
Installation included the partition junction and operating checks.
SEPPES supplied and installed the package, then completed on-site operating checks with the customer. The installation scope extended beyond fitting a curtain into an opening.
Confirm the Configuration
The team agreed the 2,500 × 2,500 mm opening, stainless-steel components, curtain and two-sided pull-cord operation before manufacture.
Install the Door and Enclosure
The door package was fitted at the internal wall-panel opening, with the control equipment and protective posts positioned at the passage.
Finish the Frame-to-Panel Interface
Sealant was applied at the gaps between the door frame and the partition panels as part of the installation work.
Commission and Hand Over
The site team carried out repeated pull-cord opening and closing checks. Installation and commissioning documentation accompanied the August 2026 handover.
Coordinate the frame-to-panel junction and installation work with the industrial door installation checklist.
Use a passage brief that covers the working and cleaning conditions.
The following checklist is for planning a similar installation. Providing these details early makes it easier to compare complete proposals and identify items that need clarification.
| Information to send | Useful detail | What it helps define |
|---|---|---|
| Opening and partition | Width, height, headroom, side space, wall-panel construction and photos. | Door envelope, fixing detail and who completes the perimeter seal. |
| Traffic | Staff or trolley route, largest loaded dimensions, movement frequency and shared use. | Visibility, activation position and review of the protective-post layout. |
| Cleaning exposure | Method, chemicals, concentration, water temperature and frequency. | Material review, approved cleaning guidance and enclosure requirements. |
| Temperature and humidity | Conditions on both sides, cleaning periods and any condensation concerns. | Whether this is an internal passage or requires a separate thermal-door specification. |
| Требуемая документация | Project acceptance criteria, material documentation and operating instructions. | The technical submittal and commissioning deliverables to include in the order. |
Make the daily-use information part of handover.
The opening will be used and cleaned repeatedly. Handover should leave the operator with clear instructions and the maintenance team with the information needed to support the installed configuration.
Checks to Agree at Commissioning
Agree checks for the selected activation points, door travel, limits, protective devices and curtain guidance. Review access to the control enclosure and inspect the completed frame-to-panel junction with the installation team.
Information for the Facility Team
Request the approved cleaning method, operating instructions, parts identification and service contact. Agree how damage, seal deterioration or a change in cleaning chemicals will be reported and reviewed. Set inspection arrangements around duty and manufacturer guidance.
Clarify the operating conditions before choosing a processing-area door.
Is a 304 stainless-steel frame enough to specify a washdown door?
No. Include the cleaning exposure, enclosure protection, cable entries, installation details and approved cleaning method. A material grade describes one part of the package; it does not define the water-protection capability of every component.
Can a self-repairing door recover from every collision?
No. Recovery applies within the conditions defined for the selected door. Ask what can be recovered, what checks are required and when the equipment must be inspected by a technician.
Should I choose pull cords or automatic activation?
Base the review on the users and approach route. This project used two-sided pull cords. For your site, discuss reach, trolley handling, adjacent movement and the desired opening request with the supplier before selecting the control method.
Does this passage configuration establish a freezer temperature rating?
No. For a freezer or a specified thermal boundary, provide the temperatures on both sides and any condensation or insulation requirement so the correct door family and configuration can be reviewed.
Can I request material or antistatic documentation?
Include the required documents and acceptance criteria in the enquiry. Confirm the evidence needed for the proposed components before the order is placed.
What is the fastest way to start a configuration review?
Send a passage photograph, opening dimensions, a sketch of staff and trolley movement, the temperatures on each side and the cleaning method. Identify the partition contractor and the person responsible for electrical work.
Planning a door for a food-processing passage?
Share the opening dimensions, traffic route, temperature conditions and cleaning method. SEPPES can help review the frame, curtain, controls and installation interfaces for the proposed opening.
