In the highly specialised marine sector, every component installed aboard a vessel plays a critical role in ensuring safe, efficient, and sustainable operations. At DMA Hydraulics & Pneumatics (Pty) Ltd, we understand that even the smallest valve—when correctly specified and expertly installed—can impact everything from operational uptime to compliance with maritime regulations.
Our latest project, the design and installation of valves for a commercial afhaal (fish processing) factory ship, perfectly showcases our expertise in marine hydraulic system design, valve engineering, and turnkey commissioning for vessels operating in demanding conditions.
This blog offers an in-depth look at how DMA tackles complex marine installations, the challenges we overcame, and why our solutions stand out in a crowded field.
Understanding the Marine Environment
Unlike land-based facilities, offshore and marine processing vessels must function flawlessly in some of the world’s harshest environments. Saltwater corrosion, continuous motion, limited space, extreme temperature variations, and long supply cycles all demand equipment that is:
- Corrosion-resistant
- Durable under pressure
- Highly efficient
- Custom-built for the task
For this afhaal factory, we were tasked with creating a complete valve solution that supported water flow control, coolant regulation, and process piping—all under a strict commissioning deadline before the next voyage.
Project Scope: More Than Just Valve Installation
This wasn’t just a case of dropping in a few off-the-shelf valves. Our client required:
- Custom valve design and configuration based on system drawings
- Full marine-grade material compliance (brass, stainless steel, composite seals)
- Integrated pressure testing and flushing
- Onboard commissioning and system balancing
DMA Hydraulics & Pneumatics led the entire project lifecycle—from design to installation and commissioning—ensuring the system delivered seamless performance from day one.
The Importance of Custom Valve Design in Marine Systems
Valves control the direction, flow, and pressure of fluids in hydraulic and pneumatic systems. In a fish processing vessel, this includes:
- Seawater intake and discharge
- Freshwater cooling
- Steam or compressed air distribution
- Process line isolation
- Backflow prevention
A factory vessel may use dozens of valve types across multiple systems, including:
- Ball valves
- Gate valves
- Butterfly valves
- Check valves
- Solenoid and electrically actuated valves
DMA’s design team worked closely with the client’s ship engineer to specify flow rates, operating pressures, and fluid types for every valve location—ensuring optimal sizing and performance across the entire system.
Challenges We Tackled
No marine project is ever “easy,” but this one came with its own set of hurdles:
1. Space Constraints
Marine piping systems are often routed through tight mechanical spaces. Our valve assemblies had to be compact yet accessible for maintenance.
2. Material Integrity
Because the vessel processes seawater and brine, all valves had to be constructed of high-grade stainless steel or corrosion-proof alloys, with long-term resistance to pitting and galvanic corrosion.
3. Process Reliability
Downtime on a factory ship equals lost revenue. Our client couldn’t afford post-installation leaks or flow failures, so every valve was tested at 1.5x the rated pressure before commissioning.
4. Tight Deadlines
The vessel was docked for a limited time before setting sail again. Our team worked extended shifts to complete fabrication, installation, flushing, and testing ahead of schedule.
Step-by-Step: How DMA Delivers Turnkey Valve Systems
Here’s a breakdown of how DMA Hydraulics & Pneumatics executed this project with precision:
1. Site Inspection & System Study
Our engineering team boarded the vessel to inspect existing piping and determine the operational needs of each system. We then created a schematic of the valve locations and requirements.
2. Valve Design & Material Selection
We specified valve types based on:
- Fluid type (water, brine, steam, air)
- Flow rates
- Temperature
- Mounting position
- Operating pressure
- Accessibility
All components met marine-grade ISO and DIN standards.
3. Fabrication & Assembly
Valve assemblies were fabricated at our workshop, complete with flanges, gaskets, pipe bends, and brackets.
4. Pressure Testing & System Flushing
Each valve and section of pipe underwent hydrostatic testing and flushing to remove debris and check for leaks—ensuring total system integrity.
5. Commissioning & Sea Trial Support
After installation, our technicians joined the vessel for sea trials to monitor real-time performance. We calibrated valve settings, checked system pressures, and made final adjustments onboard.
Why It Matters: Efficiency, Longevity & Safety
In the marine industry, an underperforming or corroded valve can:
- Cause flooding or contamination
- Reduce system efficiency
- Lead to emergency repairs at sea
- Jeopardise crew safety and catch quality
Thanks to DMA’s approach, this vessel now has a fully customised, high-efficiency valve system that:
- Enhances operational uptime
- Minimises maintenance cycles
- Meets all compliance standards
- Extends equipment life in saltwater exposure
The DMA Difference
DMA Hydraulics & Pneumatics (Pty) Ltd is not just another hydraulic service provider. We specialise in:
- Full system rebuilds for marine and industrial equipment
- Spare parts sourcing and remanufacturing
- Special product design (valves, manifolds, pipework)
- Pipe bending and hydraulic tubing
- Onsite pressure testing and sea trial commissioning
This project is just one of many that highlight our hands-on expertise and commitment to quality. Whether it’s a new system install or a critical retrofit under time pressure, we deliver results that perform under pressure—literally.
Ready for Your Next Marine Project?
If you operate in the maritime industry and need:
- Hydraulic or pneumatic system design
- Custom valve solutions
- System rebuilds or upgrades
- Commissioning support
…get in touch with the experts at DMA Hydraulics & Pneumatics today.
