Henger Manufacturing (Shandong) Machinery Technology Co., Ltd.

made-in-henger.com  |  Blog Draft - Industry News

Seafood Processing Plant Hygiene Equipment: Choosing Washers for Fish, Shrimp and Smoked Fish Lines

Blog Post - Industry News | Publish date: 2026-09-17

Introduction

Seafood processing combines the two conditions that make hygiene equipment fail earliest: constant water and salt. Fish, shrimp and shellfish plants wash down continuously, run chilled and ice-water slurry lines, and move product in plastic crates that come back from auction halls, markets and cold stores. All of those conditions attack the same surfaces - stainless steel frames, conveyor chains, cart wheels, and the containers that touch the product next.

Because the soil is different in each type of seafood operation, the equipment mix is different too. This guide groups seafood plants into four profiles - filleting and primary processing, smoked fish and value-added lines, shrimp and shellfish, and markets and cold-chain distribution - and shows which machines each profile needs, using specifications published on Henger’s product pages.

Why Seafood Plants Are the Hardest Wet Environment in Food Processing

· Salt and chloride are present every day. In seafood plants the washdown water carries salt from the product itself, so frames, conveyor chains and fixings are wet and saline year-round. Material, plate thickness and drainage design matter more here than in any other food sector.

· Slime and scales stick, then dry. Fish slime and scales bond to plastic and stainless surfaces. Dried onto a crate or a cart shelf, they are considerably harder to remove than fat or blood.

· Ice-water slurry moves soil into corners. Chilled water that holds product also carries organic load into tray stacks, cart wheels and floor joints - places a hose cannot reach.

· Continuous washdown redistributes soil as fast as it removes it. In a permanently wet hall, the cleaning process has to take soil out of the environment, not move it around it.

· Containers come back from outside the plant. Crates and boxes travel to auctions, markets and customers, so washing has to be a fixed step in the daily routine rather than an occasional project.

Four Seafood Plant Profiles and Their Priority Equipment

The fastest way to specify seafood hygiene equipment is to identify which profile your plant matches - or which mix of profiles it runs - and start there.

Profile 1 - Filleting and Primary Processing: Tunnel-Type Crate Washers

Filleting halls are the crate capital of a seafood plant. Boxes and crates arrive from the filleting tables, from chilling rooms and from customers, and each one has to be washed before it goes back on the line. A tunnel-type machine washes them continuously: containers feed on a dual-track conveyor through heated, high-pressure spray stages. Henger builds the HE-3600 and HE-4800 crate washing machines in food-grade SUS304 stainless steel with a recirculating multi-tank water system and an optional air drying tunnel.

Two details matter in a seafood plant specifically. The heated pre-wash stage does the initial work on dried slime and scales before the main wash, which is why the machine is built with a dedicated first stage rather than a single spray zone. And if crates return to a chilled or packing area, the air drying tunnel removes the residual water film that would otherwise carry moisture - and the salt in it - back onto clean containers.

Profile 2 - Smoked Fish and Value-Added Lines: Rack Cart Washers

Smoked fish producers use the same rack carts as meat smokehouses: tall stainless frames that carry product through smoking, cooking and cooling. After each thermal cycle the carts carry fat, protein residue and smoke deposits, and every wheel and shelf gap is a hygiene risk if cleaning is inconsistent. The SCW-580 smokehouse rack cart washer is a chamber machine built for exactly this job, with a 360-degree rotating frame and a multi-angle spray system so the cart is cleaned on all sides, shelves and undersides in one cycle.

The hygienic point of the design is water separation: wash water is collected in a circulation tank, filtered and reused for the main wash steps, while the final rinse uses fresh water from a separate clean water tank. That means the last water to touch the cart has not already carried soil from the previous one - a simple principle, but one that fixed-spray manual cleaning cannot achieve. Cart dimensions should be reviewed with the engineering team, since the chamber and rotating frame are sized to your actual carts.

Profile 3 - Shrimp, Shellfish and Soaking Operations

Shellfish and shrimp halls run wetter and heavier than most filleting lines: product is held in chilled brine or ice water, shells and organic slurry end up on trays and floors, and staff work in waterproof aprons for the whole shift. Three pieces of equipment carry most of the load.

First, hand hygiene. A stainless steel hand washing and disinfection station combines an induction faucet, soap dispenser, disinfectant dispenser and hand dryer in one 304 stainless steel unit, with configurations from one to five stations. From the two-station configuration upward, select models add a front-mounted soaking tank for pre-disinfection of heavily soiled hands - a practical feature where gloves and hands come back from shelling or brine work.

Second, workwear. Waterproof aprons are the working uniform in a shrimp or shellfish hall and they cannot wait for an external laundry. The apron washing machine is a 1,000 x 650 x 1,500 mm stainless steel cabinet driven entirely by water pressure with no electrical connection, automatic dosing of cleaning and disinfectant agents, and a wash / disinfect mode selected by a single knob.

Profile 4 - Markets, Auction Halls and Cold-Chain Distribution

Auction and distribution operations are different again: crate volume is very high, the crate mix is uncontrolled, and the same plant often handles both product crates and waste containers. Here the crate washer is a throughput machine, and the second requirement is getting bins and waste containers out of the loop.

Henger’s automatic tunnel-type trash can and bin washing machine handles 120L and 240L wheelie bins and large containers on a heavy-duty stainless steel conveyor chain, with a three-stage process - hot pre-wash with detergent, high-pressure recirculating main wash, and a fresh water final rinse. Sloped, large-bore drainage valves and multi-layer drawer-style filtration are designed for the organic load a seafood plant puts through waste containers.

Hall Washdown: The Requirement Behind Every Profile

Wet floors, wall panels, conveyor frames and overhead structures are washed down in every seafood operation, whatever the profile. A central foam cleaning station consolidates high-pressure rinsing, foam cleaning, disinfectant application and compressed-air foam into one fixed workstation, with a 25 m sanitary hose, constant pressure control and intelligent timing - and a published water saving of 70% versus conventional cleaning methods.

What Every Seafood Plant Needs Regardless of Profile

Four requirements cut across all four profiles. They are usually worth planning in the same layout drawing as the container washers.

Container washers, bin washers, rack cart washers and workwear equipment are all one wash-room workflow, which is why Henger groups them under a single Tools Washing Solution rather than selling single machines. The entry sequence - change, wash, disinfect, enter - is planned on the same drawing as a Complete Dressing Room Hygiene Solution, so that people, containers and surfaces are covered by one layout instead of three separate purchases.

Seafood Plant Equipment Selection Checklist

Use this as a first-pass specification list, then confirm sizes, utilities and material requirements with our engineering team against your floor plan.

FAQ

Q1: How does salt water affect stainless steel washing equipment?

Henger builds wash-room equipment from food-grade SUS304 stainless steel - 2.0 mm plate on the crate and cart washers, 1.2 mm body thickness on the hand washing stations - with fully welded surfaces intended for humid, regularly washed-down production areas. In a seafood plant the washdown water itself carries salt, so the practical protection comes from the combination of material grade, drainage design and a consistent rinse-down routine. We recommend reviewing your water chemistry and cleaning regime with our engineering team so the specification matches your site.

Q2: Can one crate washer handle both fresh and frozen seafood containers?

Yes, as long as the container fits the conveyor envelope - up to 650 mm wide and 350 mm high. Containers that have held frozen product often arrive with ice and heavier residue, which is where the heated pre-wash stage (water up to 95°C) does the initial work before the main wash. Containers outside the envelope need a customised opening.

Q3: What machine should a smoked fish plant use for its rack carts?

A chamber-type rack cart washer rather than a tunnel. The SCW-580 is sized for carts up to 1,000 x 1,000 x 2,000 mm and processes 20-30 carts per hour, running circulation wash, foaming, a second circulation wash and a fresh-water final rinse from a separate clean water tank. Cart drawings should be reviewed with our engineering team so the chamber and rotating frame match your carts.

Q4: How do we handle entry hygiene when crates and staff arrive from outside?

By treating the dock and hall doors as hygiene points rather than thoroughfares. Compact boot washers such as the HE-HCDS19 (1,200 x 620 x 920 mm, photoelectric sensor start, boot sides and soles) can be installed in parallel across entry lanes, and multi-station hand washing units from one to five stations match the number of people crossing at shift change.

Q5: How do you keep odour and organic load under control in a wet seafood hall?

The equipment side of the answer is removal rather than redistribution. Heated high-pressure washing lifts soil off surfaces, tank filtration captures solids before water is recirculated, and machines with a separate clean water tank - like the SCW-580 - finish with water that has not already carried soil. Bin washers with sloped, large-bore drainage support fast disposal of the slurry that wet seafood operations generate. Drainage layout and floor falls are site design issues that should be coordinated with the equipment plan.

Q6: What footprint and utilities should a seafood plant plan for?

As reference figures: tunnel crate washers run 300-1,000 crates per hour in 3.6-4.8 m of line length; the SCW-580 requires 26.5 kW total power and a plant steam connection for the heated circulation tank; the bin washer processes 120L/240L bins continuously on a conveyor; hand washing stations range from 550 x 380 mm to 2,400 x 550 mm; the HE-HCDS19 boot washer is 1,200 x 620 mm. Henger provides free layout drawings before purchase.

Closing Call to Action

Seafood hygiene is a profile problem before it is a machine problem. Identify which profiles your plant runs, match the washer to the container - crates and boxes to a tunnel machine, smokehouse rack carts to a chamber machine, bins and waste containers to their own line - then cover people and surfaces with entry hygiene and a central foam station.

If you are specifying hygiene equipment for a new seafood line or upgrading an existing wash room, Henger’s engineering team can prepare a free layout drawing and quotation for the complete package. Inquire now through the contact form, email info3@hengerchina.com, or WhatsApp +86 188 5430 1052.