Why Choosing the Right Hydraulic Hose Matters
Selecting the wrong hydraulic hose is one of the most common causes of system failure, unplanned downtime, and injury. With hundreds of hose types available, it can be difficult to know where to start. This guide gives you a practical framework for getting it right every time.
Understanding Hydraulic Hose Types
PTFE Hoses
PTFE (polytetrafluoroethylene) hoses are the go-to choice when chemical resistance and high-temperature performance are priorities. The smooth PTFE bore reduces fluid friction, making them ideal for pharmaceutical, chemical processing, and food industry applications. They handle temperatures from -65°C to +260°C and are compatible with virtually all hydraulic fluids.
Food Grade Hoses
For food processing, beverage production, or any application where hydraulic fluid may contact consumables, food grade hoses are essential. These hoses meet FDA and EU food safety regulations, using materials that are non-toxic and easy to clean. Never use a standard industrial hose in a food-contact environment.
High-Pressure Hoses
High-pressure hoses — typically rated to 350 bar and above — are constructed with multiple wire braid or spiral reinforcement layers. They are the backbone of most heavy plant machinery, excavators, agricultural equipment, and industrial hydraulic systems. The construction method directly determines the maximum working pressure.
Low-Pressure Hoses
Not every application requires high-pressure capability. Return lines, suction lines, and drain lines operate at much lower pressures. Low-pressure hoses, often with textile reinforcement, offer the flexibility needed in these areas at a lower cost.
Working Pressure vs Burst Pressure
These two terms cause confusion. Here is what you need to know:
- Working Pressure: The maximum pressure at which the hose is rated to operate safely and continuously. Never exceed this in normal operation.
- Burst Pressure: The pressure at which the hose will fail catastrophically. Burst pressure is typically 4:1 over working pressure — so a hose rated at 300 bar should burst at around 1,200 bar. This safety margin is built in, but it is not a licence to exceed working pressure.
Always specify hose with a working pressure rating above your system’s maximum operating pressure, including any pressure spikes or transients.
Temperature Ratings
Temperature significantly impacts hose life and performance. Every hose has a rated temperature range covering both fluid and ambient conditions. Key points:
- Continuous high-temperature operation degrades the inner tube and outer cover more quickly.
- Cold temperatures can make hoses stiff and brittle — important for outdoor applications in winter.
- PTFE hoses offer the widest temperature range; standard rubber hoses are more limited.
Fluid Compatibility
Not all hoses are compatible with all hydraulic fluids. Using an incompatible fluid can cause the inner tube to swell, deteriorate, or shed particles into the system, contaminating your oil and damaging downstream components.
- Mineral oil: Compatible with most rubber and PTFE hoses.
- HFA/HFB/HFC water-based fluids: Require specific inner tube materials; always check the compatibility chart.
- Phosphate ester (HFD): Requires PTFE or specially rated hoses.
- Biodegradable fluids (HETG, HEES): Compatible with most rubber hoses but confirm with your supplier.
Use the STAMPED Method
A useful memory aid for hose specification is STAMPED: Size, Temperature, Application, Material compatibility, Pressure, Ends/fittings, and Delivery/routing. Working through each factor systematically ensures you do not miss anything critical before ordering.
Build Your Own Hose Assembly
Hydra-Line makes it easy to get a hose assembly built to your exact specification. Use our Build Your Own Hose tool to select your hose type, length, and end fittings. We cut and crimp hose assemblies to order with fast turnaround and UK-wide delivery.
Need Expert Help?
If you are unsure which hose is right for your application, our technical team is here to help. We have been supplying hydraulic hoses to UK industry for years and can advise on even the most demanding applications. Call us on 01782 658535 or email info@hydra-line.co.uk — we are always happy to assist.