When you’re lifting, shifting, or aligning loads measured in tonnes, your choice of jacking equipment can mean the difference between a safe, successful job — and costly delays or damage. High-pressure hydraulic cylinders offer the power and precision required for demanding tasks across construction, transport, and industrial maintenance.
At Enzed Geelong, we supply a wide range of BOSS Hydraulics high-pressure cylinders built for serious lifting. Whether you’re jacking a bridge, positioning heavy machinery, or maintaining a mining fleet, here’s what you need to know to select the right gear.
What Are High-Pressure Hydraulic Cylinders?
These are compact, high-force devices designed to generate immense pushing or pulling force using pressurised hydraulic fluid — often at pressures up to 700 bar (10,000 psi).
Key types include:
- Single-Acting Cylinders: Extend under pressure, retract via spring or load force.
- Double-Acting Cylinders: Extend and retract under pressure — ideal for precise control.
- Lock-Nut Cylinders: Allow safe load holding with mechanical locking collars.
- Low-Profile Cylinders: Perfect for tight-access environments.
With tonnage capacities ranging from 10T to over 200T, and strokes from 25mm to 300mm+, these cylinders are the backbone of many large-scale operations.
Where Are They Used?
1. Civil & Structural Works
- Lifting bridge decks for bearing replacement
- Leveling concrete structures or piers
- Preloading and tensioning applications
2. Heavy Transport & Mobile Mechanics
- Raising trailers, loaders, and heavy haulage
- On-site field servicing of machinery
3. Industrial & Mining Maintenance
- Plant shutdowns and asset lifting
- Pressing, straightening, and heavy assembly tasks
4. Marine & Utilities
- Lock gate maintenance
- Subsea structure support
What to Consider When Choosing a Cylinder
- Load Requirements – What’s the weight and distribution of the load? Factor in safety margin (typically 1.5x the load).
- Stroke Length – How far does the load need to be moved or lifted? Match this to cylinder stroke.
- Available Clearance – Use low-height “pancake” cylinders where space is tight.
- Operating Orientation โ Horizontal? Vertical? Consider how the cylinder will be supported and guided.
- Return Method – Spring return (simpler), load return (for heavy items), or double acting (for full control).
- Environment – Dusty or wet environments may require corrosion-resistant finishes or special seals.
- Accessories – Hoses, couplers, manifolds, and gauges must match cylinder ratings and configurations.
- Pump Type – Manual, electric, or air-over-hydraulic — pump capacity must suit the cylinder and application.
Installation & Safety Considerations
High-pressure jacking is not just about power — it’s about control and safety.
Key practices:
- Never exceed rated pressure or use adapters not rated for 700 bar.
- Always use pressure gauges to monitor operation.
- Support loads with cribbing or locking collars — not fluid pressure alone.
- Bleed the system before use and inspect for leaks, wear, or kinks in hoses.
- Use certified lifting slings and safety gear on site.
Why Choose Enzed Geelong?
We’re not just resellers — we’re trusted partners in your hydraulic systems. Enzed Geelong is an authorised distributor of BOSS Hydraulics, and we offer:
- Expert advice on sizing, compatibility, and job requirements
- Access to Australia’s leading high-pressure lifting products
- Local stock in Geelong with fast shipping Victoria-wide
- Optional on-site installation and system setup
We’ve supported civil projects, roadwork crews, marine maintenance teams, and mobile mechanics with the right gear — and we’re ready to support you.
Explore Our Range
Our online store includes:
- Single-acting jacks (10T–100T+)
- Lock-ring cylinders for safe load-holding
- Low-profile cylinders for tight spaces
- High-pressure hydraulic pumps and hoses
- Pressing and tensioning kits
We also source custom equipment — just reach out.
Get in touch for the right equipment
If your work involves shifting serious weight, the right jacking equipment isn’t just useful — it’s essential. With the support of Enzed Geelong and premium cylinders from BOSS Hydraulics, you get lifting power, safety, and reliability on every job.
๐ Call us or visit the website to browse high-pressure jacking gear today.
Frequently Asked Questions (FAQs)
Can I use a high-pressure hydraulic cylinder with any hydraulic pump?
A: Not all pumps are rated for 700 bar (10,000 psi) operation. Always ensure the pump you choose is pressure-compatible with your cylinder. Using an under-rated pump can result in damage or safety hazards.
What hydraulic oil should I use?
A: Use only ISO-grade hydraulic fluid recommended by the cylinder manufacturer. For BOSS Hydraulics cylinders, consult the specification sheet or ask the Enzed Geelong team.
How do I maintain a hydraulic cylinder?
A: Regularly inspect for leaks, clean fittings, check for rod scoring, and verify pressure ratings on gauges and hoses. Maintenance intervals depend on usage conditions.
Can Enzed Geelong repair my jack or cylinder?
A: We specialise in supplying new high-pressure jacks and accessories. While we don’t offer repair services in-house, we can help diagnose issues and recommend trusted local repairers.
High-Pressure Hydraulic Cylinder Buying Checklist (Graphic)
- โ Load Capacity: Know your required tonnage and apply a 1.5x safety factor
- โ Stroke Length: Match the lifting height or displacement needed
- โ Cylinder Type: Choose single, double-acting, lock-nut, or low-profile as needed
- โ Return Type: Spring return, load return, or double acting?
- โ Clearance: Do you have enough vertical or horizontal room?
- โ Environment: Is the jobsite wet, dirty, or corrosive?
- โ Pump Compatibility: Ensure your pump delivers enough flow and pressure
- โ Hose and Coupler Ratings: All connections must match 700 bar pressure
- โ Accessories: Order gauges, manifolds, shut-off valves, and stands if needed
Real-World Example: Lifting a 100-Tonne Bridge Deck
Recently, a civil engineering crew in regional Victoria needed to lift a 100-tonne bridge deck to replace ageing bearings. The clearance under the deck was less than 300mm, so a low-profile 100T lock-nut cylinder was chosen.
The team paired it with an electric high-flow pump, 3-metre ultra-flex hoses, and pressure gauges rated to 700 bar. Safety cribbing was installed under the deck before retraction.
The result? A smooth, safe lift completed within half a day — with no damage to the structure or risk to personnel.
Enzed Geelong supplied and delivered all components on-site with pre-assembled connections, saving the crew hours of setup time.
Advanced Installation Tips
- Always clean and inspect threads, couplers, and mating surfaces before assembly.
- Use thread sealant where specified — avoid overtightening fittings.
- When using multiple cylinders, synchronise using a flow divider or manifold block.
- Avoid side-loading the cylinder — ensure the ram stays aligned to prevent scoring or jamming.
- Mount the pump in a protected area with adequate ventilation and safe cable routing.
- Anchor or secure hoses away from pinch points or sharp edges to prevent damage during lifting.