Stainless Hydraulic Power Unit — Manufacturing, Repair, Overhaul (Izmir)

Stainless Hydraulic Power Unit Manufacturing, Repair and Overhaul in Izmir

A stainless hydraulic power unit is the power source for systems working in corrosive environments. Daily washdown in food production facilities, constant humidity and chlorine in treatment plants, aggressive vapours in chemical plants, salt air on marine and port equipment — every one of these conditions wears out a standard painted-steel tank and carbon steel components in short order. At ÇevikSan we carry out stainless hydraulic unit manufacturing, repair and overhaul in Izmir.

Stainless hydraulic power unit manufacturing isn't just about making the tank out of stainless. From the tank's welds to its fasteners, from the pipework to the panel housing, the whole system needs the same treatment — because corrosion always starts at the weakest link. The same approach applies to the cylinders the unit feeds — stainless hydraulic cylinders are something we manufacture too.

Why Is a Stainless Unit Necessary?

A standard power unit's tank is made of painted sheet steel. Paint is only a temporary barrier against corrosion: a scratch, an impact, or constant chemical contact breaks through it, and rust starts advancing from underneath. The result is a problem that goes beyond what you can see from outside — rust particles shedding from inside the tank mix into the oil, clog filters, and wear down the pump and valves.

Environments where a stainless unit becomes essential:

• Food and beverage facilities: Daily washdown, foam cleaning, steam and hygiene audits.
• Water and wastewater treatment: Constant high humidity, chlorine and a chemical-dosing environment.
• Chemical and pharmaceutical industry: Acid/base vapours and spill risk.
• Marine, shipyard and port settings: Salt air — where corrosion advances fastest.
• Textile finishing plants: Hot, humid, chemically laden air.
• Systems operating outdoors: Rain, humidity and temperature swings.
• Washdown lines and disinfection units: Contact with pressurised water and detergent.

Using a standard unit in these environments looks like a saving on the initial investment, but within two or three years it comes back, compounding, as tank renewal, frequent filter changes, pump faults and unplanned downtime. On lines with daily washdown especially, a painted tank's life falls well short of expectations — at first glance that looks like poor manufacturing quality, when the real issue is material choice.

What's Different in a Stainless Unit?

In a stainless unit, it's not just the tank that gets reviewed — every element exposed to corrosion does. The differences from a standard unit:

This table matters for clarifying what "stainless unit" actually means. A unit with only its tank made stainless, but with carbon steel bolts and a painted panel, still ends up covered in rust spots in short order. We state in writing in our quote which component is made from which material — so you know exactly what you're buying, and can make a fair comparison between different quotes.

Our Stainless Unit Manufacturing Process

Stainless hydraulic power unit manufacturing requires more care and a different technique than standard production:

1. Needs and environment analysis: The system to be fed, its force/speed requirements, and the environment's chemical and cleaning regime are determined together.
2. Material grade decision: If chlorides are present, 316 is chosen; for general humidity and food-grade cleaning, 304 — this decision is made jointly.
3. Sizing: Flow, pressure, motor power and tank volume are calculated; heat balance is assessed.
4. Tank fabrication: Stainless sheet is cut, formed and joined with the appropriate welding technique; weld zones are processed to preserve corrosion resistance.
5. Tank internal cleaning: Weld slag and swarf residue are cleaned out — a critical step so no contamination enters the system from day one.
6. Component assembly: Pump, motor, valve group and gauges are mounted using stainless fasteners.
7. Testing and commissioning: Tested unloaded and under load; pressures are set, sealing and heating are observed.
8. Delivery: The unit is installed on site, and we walk you through operation and maintenance points.

Electrical Panel and Protection Class

The component most often overlooked in a stainless unit is the electrical panel. The tank gets made stainless, but if the panel is left as painted sheet, corrosion starts there, and electrical-fault risk follows.

What to watch for in washdown and humid environments:

• Panel housing: A stainless-sheet panel is preferred; painted sheet deteriorates quickly under pressurised water.
• Protection class (IP): Chosen to match the environment. Environments washed with pressurised water need a high protection class.
• Gasket and cover sealing: The panel door gasket should be checked regularly; an aged gasket lets water in.
• Cable glands: Cable entry points are the weakest spot; the right fitting and sealing must be used.
• Placement: The panel is positioned somewhere direct water spray can't reach.
• Internal humidity management: In environments with a large temperature swing, condensation can form inside the panel; measures are taken where needed.

At first glance these details seem unrelated to hydraulics, but a significant share of the faults that stop a system have electrical origins. Thinking through the entire unit is more meaningful than making just the tank stainless.

We also assess panel condition on your existing units. Sometimes, without needing to renew the tank at all, simply upgrading the panel and electrical connections noticeably extends the unit's life.

Technical Differences in Stainless Tank Manufacturing

Stainless tank fabrication differs from painted-sheet tank fabrication in several ways. If these differences are overlooked, the result is a tank that carries the "stainless" label but still loses out to corrosion:

• Cutting and forming: Stainless sheet picks up contamination if cut on equipment used for carbon steel. Dedicated equipment or cleaning is required.
• Welding technique: Heat input is controlled; an overheated zone changes structure and loses corrosion resistance. Shielding gas use matters.
• Post-weld cleaning: The oxide layer at the weld zone is cleaned and the protective layer is allowed to re-form. Skipping this step means corrosion shows up here first.
• Tank internal cleaning: Weld slag and swarf residue are cleaned out. Carbon steel swarf left inside a stainless tank means both contamination and system contamination.
• Interior surface condition: The tank interior needs to be smooth and cleanable to keep the oil clean.
• Port locations: Suction, return and drain ports must be stainless and correctly positioned.

All of these steps take time and care; they don't appear as separate line items on the quote, but they determine how many years the tank will last. A stainless tank being surprisingly cheap usually shows one of these steps was skipped.

Audits and Compliance in Food Facilities

In food production facilities, a hydraulic unit is an item that draws attention during audits. Any system carrying oil-leak risk is assessed from a hygiene standpoint. What we account for in the design at these facilities:

• Placement: The unit is positioned as far as practical from the product line and open product areas.
• Leak visibility: Layout and floor arrangement chosen so a possible leak is spotted early.
• Containment: A drip tray or collection basin planned where needed.
• Cleanability: Reducing corners that trap dirt, and slopes that prevent water pooling.
• Oil selection: Using an appropriate grade of oil in zones with product contact risk.
• Record-keeping accessibility: An accessible, labelled design so maintenance and cleaning records can be kept.

If you operate at an audited facility, knowing what points the auditor has flagged before directly improves the design. Sharing this information is one of the most valuable inputs you can give us.

On hygienic lines, an oil leak isn't just a maintenance issue — it's a non-conformance that can stop production. That's why we especially recommend planned maintenance at these facilities: catching a small leak early can mean saving an entire shift.

Stainless Hydraulic Unit Repair and Overhaul

Stainless hydraulic unit repair and stainless hydraulic power unit overhaul are the economical way to renew your existing system. Our scope:

• Fault diagnosis: The source of the problem is identified with pressure, flow and temperature measurements.
• Pump and valve service: Overhaul or replacement with an appropriate equivalent.
• Tank cleaning and inspection: Sludge, varnish and corrosion traces are cleaned; weld zones are examined.
• Corrosion repair: Local damage is fixed; advanced areas are renewed.
• Line and connection renewal: Worn hoses, pipes and fittings are replaced with stainless equivalents.
• Filter and oil renewal: Filter and oil selection matched to ambient conditions.
• Testing and commissioning: The system is tested and handed back running.

Stainless hydraulic unit overhaul is, in most cases, more economical than building a new unit — especially where the tank and chassis are sound, renewing the internal components is the wisest route. The decision is made after inspection, and both options are presented with their price. Where corrosion has advanced and tank wall thickness has reduced, though, we don't insist on repair — safety in a pressurised system always comes before cost.

Special Notes for Food and Hygienic Facilities

In food production, a hydraulic unit's job isn't just generating power — it also has to keep pace with the hygiene regime. Points we pay attention to for these facilities:

• Cleanable surface and layout: Reducing corners that trap dirt, and slopes that prevent water pooling.
• Washdown durability: Protection classes suited to cleaning with pressurised water and detergent; special care on the panel and electrical connections.
• Leak visibility: Early detection of an oil leak is critical for hygiene; layout is planned accordingly.
• Product contact risk: The unit's location and protective measures are assessed to keep it away from the product line.
• Audit readiness: An accessible design so cleaning and maintenance records can be kept.

Describing your facility's cleaning procedure (chemical, temperature, frequency) is the most valuable information you can give us for the right design. It takes the guesswork out of material and protection-level selection. If you operate at an audited facility, knowing what points the auditor has flagged before also directly improves the design.

Stainless Unit Needs by Sector

Not every facility requesting a stainless unit has the same needs. Our main areas of manufacturing and their standout requirements:

Worth noting: not every application requires the highest level. In an enclosed, dry machine room, a stainless unit is an unnecessary cost. On a line with chlorinated cleaning, by contrast, a painted tank means renewal within a few years.

Seeing the facility is the easiest way to determine the right level. In some cases an intermediate solution is enough: a stainless tank with a protected painted chassis, or stainless for the critical zones and standard for the rest. The survey is free within Izmir.

Cost and Payback Calculation

A stainless unit costs more than a standard one. The items that make up the difference:

• Tank material: Stainless sheet is noticeably more expensive than painted sheet. 316 costs more than 304.
• Welding and machining: A special technique, shielding gas and a post-weld cleaning step are required.
• Fasteners: Stainless bolts, nuts, fittings and pipe.
• Panel and electrical protection: A high-protection-class, stainless-housed panel.
• Gaskets and sealing: Special materials resistant to the environment.
• Chassis and legs: Stainless profile or a protected structure.

On the other side of the equation: how often does a painted tank need renewing in a corrosive environment? How often does shed rust clog the filters? How early do the pump and valves wear out? What does it cost if a leak stops production at a hygienic facility?

Add those up, and a stainless solution is usually more economical over the medium term in corrosive environments. Before deciding, look at how often your current system needs renewal and service — those numbers show the payback period fairly clearly.

What We Need From You During Ordering

The information we need to design the right stainless unit:

1. Environment information: Where will the unit go? A washdown area, an enclosed machine room, or outdoors?
2. Cleaning procedure: Which chemical, at what temperature, how often? Is pressurised water used?
3. Chloride status: Is salt water, sea air or a chlorinated product present? If yes, 316 is required.
4. System to be fed: How many cylinders, what force, what speed?
5. Duty regime: Continuous or intermittent? How many hours a day?
6. Space constraints: Area and height allocated for the unit.
7. Electrical infrastructure: Existing panel capacity, voltage, automation needs.
8. Audit requirements: Do you go through hygiene or sector audits? What points have been flagged before?

If you're renewing an existing unit, it's easier still: let us see the old unit, take its nameplate data, and pull the connection dimensions. The new unit drops straight into the old one's place with no changes needed to the machine.

Maintaining a Stainless Unit

Being stainless doesn't mean it can go without maintenance. Practices that extend its life:

• Surface cleaning: Dried chemical residue starts localised corrosion; regular rinsing matters.
• Carbon steel contact: Steel swarf, tools or bolts touching the stainless surface can contaminate it and start rust.
• Oil and filter tracking: Water contamination risk is higher in humid environments; oil clarity should be checked regularly.
• Leak scanning: Even the smallest leak is a serious matter in hygienic environments.
• Temperature monitoring: Overheating finishes off both the oil and the gaskets.
• Panel and electrical check: Sealing gaskets should be checked periodically because of moisture and washdown.

We also carry out these checks as part of a periodic maintenance programme. For units running on critical lines, planned maintenance is always cheaper than unplanned downtime. On hygienic lines, an oil leak isn't just a maintenance issue — it can be a non-conformance that stops production; we especially recommend planned maintenance at these facilities.

Standard or Stainless? A Decision Table

Not every facility needs a stainless unit. Choosing it unnecessarily is a waste of budget; not choosing it where it's needed means early replacement. Our decision criteria:

Intermediate solutions are possible too: a stainless tank with a protected painted chassis, or stainless for critical zones with standard elsewhere. Our aim isn't to sell the most expensive solution, but the one that fits your environment. Seeing the facility during the survey makes this decision much easier — it isn't a call you make from a catalogue.

Managing Oil in a Humid Environment

The environments a stainless unit operates in are usually humid, which creates a separate risk for the hydraulic oil. Water mixing into the oil is a far more common problem in corrosive environments than at standard facilities.

How does water get in?

• Condensation through the tank breather: The tank "breathes"; if the temperature swing is large, water condenses inside. This risk multiplies in a humid environment.
• Splashing during washdown: If the fill port, level gauge or cover gasket is weak, water enters directly.
• A worn rod wiper: The cylinder rod carries outside moisture in with it.
• Heat exchanger leaks: In water-cooled systems, water can pass from the cooler into the oil.

Water's effects are clear: the oil's lubricating power drops, corrosion starts on metal surfaces, the additive package breaks down, and there's a risk of microbial growth. The symptom is typical — the oil turns cloudy like milk.

Measures we take in these environments:

• Choosing a moisture-absorbing type of breather filter
• Positioning fill and level points where they're protected from splashing
• Putting cover gaskets on a regular check programme
• Adding oil clarity to the monthly checklist
• Evaluating water-separating equipment where needed

If water is found, changing the oil alone isn't enough — the entry point needs to be found. Otherwise the new oil ends up in the same state in short order. That's why we examine the whole system in cases of cloudy oil.

The Hidden Cost of Corrosion: Contaminated Oil

The most visible result of a corroded tank is the staining on the outside; but the real damage happens inside. Microscopic rust particles shed from inside the tank mix into the hydraulic oil and set off a chain of wear through the system:

• Filters clog fast: Filter change frequency increases; if unnoticed, the filter goes to by-pass and dirty oil spreads through the whole system.
• The pump wears: Particles abrade the pump's internal surfaces like sandpaper; flow drops, noise increases.
• Valves stick: Buildup on sensitive valve spools disrupts motion; the system starts behaving unpredictably.
• Cylinder seals get cut: Hard particles in the oil cut the seals; leaks start, and cylinder overhaul becomes necessary.
• Oil life shortens: Contaminated oil has to be changed more often.

In other words, the "the tank's rusted, let's just paint it" approach doesn't solve the problem — because the contamination already spread through the system stays in place. In these cases we recommend a system flush and oil change alongside tank renewal. This is the real rationale for choosing a stainless tank: not appearance, but keeping the oil clean and extending the life of every component connected to it. Put the cost of a tank next to the combined value of the pump, valve group and cylinders it feeds, and it becomes clear why the right material choice isn't the expensive option.

A Stainless Unit Maintenance Programme

A unit working in a corrosive environment needs more regular maintenance than one in a standard setting. Our recommended check programme:

Most of these checks take a few minutes and need no tools. Done regularly, both corrosion starting points and hydraulic faults are caught while they're still small.

We set up periodic maintenance agreements for units running on critical lines: we visit at agreed intervals, run through the checklist and report on system health. At facilities undergoing hygiene audits, these records are especially valuable — a regular maintenance history to show an auditor usually clears up questions before they're asked.

Stainless Unit Glossary

Terms that come up in our quotes and reports:

You don't need to know these terms, but we find them useful for anyone who wants to see what's what and why it was chosen on a quote. If a line item is unclear, don't hesitate to ask — we'd rather walk through the quote with you and explain what every item covers.

Stainless Hydraulic Unit Service in Izmir

Our workshop is at Mersinli Mah. 2843 Sk. No:15, Konak / İzmir, in the Mersinli industrial district of Konak. We serve production facilities in Kemalpaşa and Torbalı, where food and beverage plants are concentrated; Aliağa, the hub of chemical and petrochemical industry; Çiğli OIZ, the organised industrial zone; treatment plants; shipyard and port areas; and Bornova, Işıkkent and Pınarbaşı.

Because power units are difficult to transport, a significant share of our work happens on site. Our team arrives with diagnostic equipment, measures on the spot and finishes as much of the job there as possible. If the unit needs to come to the workshop, we manage the teardown, transport and reinstallation. The survey is free within Izmir.

Our preferred approach in stainless applications is to treat the system as a whole: when the unit, cylinders, lines and fasteners are all chosen with the same material logic, the chain of corrosion is broken. The most common problem we see in systems assembled from different suppliers' parts is a single incompatible component rusting the whole system. Call us to talk through your project: 0553 608 69 10. A single visit to your facility is usually enough for us to discuss the right solution.

Frequently Asked Questions