Alfagomma Hydraulic Hose | High Pressure Hose & Technical Guide
Alfagomma Hydraulic Hose | High Pressure Hose & Technical Guide
Alfagomma Hydraulic Hose: Technical Guide to Selection, Pressure Ratings and Applications
Choosing the right hydraulic hose is critical for the safety, reliability and efficiency of any hydraulic system. A hydraulic hose must withstand the required working pressure, temperature, hydraulic fluid, mechanical movement and environmental conditions throughout its service life.
Alfagomma hydraulic hoses are used across mobile hydraulics, industrial machinery, construction equipment, agricultural machinery, energy applications and other demanding hydraulic systems.
With a product range covering wire braid, spiral, compact, thermoplastic and PTFE hoses, Alfagomma provides hydraulic hose solutions for a wide range of pressure and application requirements. The manufacturer's current hydraulic portfolio includes hoses, fittings, adapters, quick couplings and related components.
This guide explains the main Alfagomma hydraulic hose types, relevant European standards, hose selection criteria and the most important factors to consider when specifying a hydraulic hose assembly.
What Is an Alfagomma Hydraulic Hose?
An Alfagomma hydraulic hose is a flexible pressure component designed to transfer hydraulic fluid between components of a hydraulic system.
A typical hydraulic hose consists of three main elements:
- Inner tube
- Reinforcement layer
- Outer cover
The inner tube provides compatibility with the hydraulic fluid. The reinforcement determines much of the hose's pressure capability, while the outer cover protects the hose against abrasion, environmental exposure and other external influences.
Alfagomma's hydraulic portfolio includes:
- Textile braid hydraulic hoses
- Wire braid hydraulic hoses
- Wire spiral hydraulic hoses
- Compact hydraulic hoses
- Thermoplastic hydraulic hoses
- PTFE hoses
The company's current product range covers hose sizes from approximately 2 mm to 102 mm depending on hose construction and product family.
Alfagomma Hydraulic Hose Standards
European hydraulic systems frequently require hoses manufactured according to recognised EN and ISO standards.
Depending on the product family, Alfagomma hydraulic hoses are associated with standards including:
- EN 853
- EN 856
- EN 857
- EN 854
- ISO 1436
- ISO 11237
- ISO 18752
- SAE J517
Alfagomma's certification information identifies, for example, its 1SN and 2SN braided hose families with SAE J517 and EN 853, while several multispiral isobaric hose families are certified to ISO 18752.
The exact standard should always be checked against the technical datasheet of the specific hose model rather than assumed from the hose size or appearance.
Alfagomma 1SN Hydraulic Hose
The Alfagomma 1SN hydraulic hose is a single-wire-braid hydraulic hose designed for a wide range of medium and high-pressure hydraulic applications.
The 1SN designation is associated with EN 853 1SN, while equivalent SAE classifications may include SAE 100 R1AT, depending on the specific product.
Typical applications include:
- Mobile hydraulic equipment
- Agricultural machinery
- Construction machinery
- Hydraulic power units
- Industrial machinery
- Hydraulic cylinders
- General hydraulic circuits
Alfagomma's FLEXOR 1SN/AT product family is listed with SAE J517 and EN 853 references.
Alfagomma 2SN Hydraulic Hose
The Alfagomma 2SN hydraulic hose incorporates two steel wire braid reinforcement layers and is designed for higher pressure applications than single-wire-braid hose constructions.
The 2SN classification corresponds to EN 853 2SN, with SAE 100 R2AT commonly used as the corresponding SAE designation.
Typical applications include:
- Construction equipment
- Excavators
- Cranes
- Agricultural machinery
- Hydraulic presses
- Industrial hydraulic systems
- Mobile hydraulic equipment
Alfagomma lists FLEXOR 2SN/AT hose families under SAE J517 and EN 853 classifications.
Alfagomma 4SP Hydraulic Hose
4SP hydraulic hose is a high-pressure, multispiral hydraulic hose designed for demanding hydraulic applications.
It is associated with EN 856 4SP and SAE J517 classifications.
4SP hoses can be suitable for applications where high pressure, mechanical loads and hydraulic impulses are present.
Typical applications may include:
- Heavy construction machinery
- Hydraulic presses
- Mining equipment
- Mobile hydraulic systems
- High-pressure hydraulic circuits
- Industrial machinery
The actual pressure rating, temperature range and minimum bend radius must always be checked for the specific Alfagomma model and size.
Alfagomma 4SH Hydraulic Hose
The Alfagomma 4SH hydraulic hose is a multispiral high-pressure hose intended for demanding hydraulic applications.
The product family is associated with EN 856 4SH and SAE J517 requirements. Alfagomma's certification information includes AG 4SH among its multispiral hydraulic hose products.
4SH hoses are commonly considered for applications such as:
- Heavy-duty construction machinery
- Mining equipment
- High-pressure hydraulic systems
- Hydraulic presses
- Industrial machinery
- Mobile equipment
When selecting a 4SH hose, the working pressure should not be considered in isolation. Dynamic pressure, impulse conditions, temperature and hose routing are equally important.
Alfagomma ISO 18752 Hydraulic Hose
ISO 18752 has become an important reference for high-pressure hydraulic hose applications.
Unlike simply selecting a hose based on nominal pressure, ISO 18752 classifications allow hose performance to be evaluated according to defined pressure and performance requirements.
Alfagomma's product and certification information includes several multispiral isobaric hydraulic hose families complying with ISO 18752, including Alfabiotech and other high-performance product ranges.
These hoses can be particularly relevant for demanding applications where high pressure and repeated hydraulic impulses are expected.
For European OEM and industrial applications, checking the exact ISO 18752 classification of the selected hose can be an important part of the technical specification.
Compact Alfagomma Hydraulic Hoses
Compact hydraulic hoses are designed to provide high pressure capability while allowing more flexible routing and reduced installation space in suitable applications.
Alfagomma's hydraulic range includes compact hose families classified under EN 857 and ISO 11237, including 1SC and 2SC products.
Compact hoses can be advantageous in:
- Mobile machinery
- Compact construction equipment
- Agricultural machinery
- Forklifts
- Tight machine layouts
- Hydraulic control systems
However, a smaller bend radius does not automatically mean that a hose can be installed without considering dynamic movement. The manufacturer's installation requirements should always be followed.
How to Choose the Right Alfagomma Hydraulic Hose
Selecting an Alfagomma hydraulic hose should be based on the complete operating conditions of the system.
The following parameters should be evaluated.
- Working Pressure
The hose's rated working pressure must be suitable for the maximum pressure experienced by the hydraulic circuit.
Do not select a hose only according to the nominal pressure shown on the hydraulic schematic.
Pressure spikes and hydraulic impulses can significantly affect hose performance.
For demanding systems, the following should be considered:
Maximum working pressure + pressure peaks + hydraulic impulses + duty cycle
- Hose Internal Diameter
Correct hydraulic hose sizing is essential for controlling flow velocity and pressure loss.
An undersized hose can result in:
- Increased pressure drop
- Higher fluid velocity
- Increased heat generation
- Energy losses
- Reduced system efficiency
- Increased noise
For this reason, hydraulic hose diameter should be selected according to the required flow rate and acceptable flow velocity.
- Operating Temperature
Temperature is one of the most important factors affecting hydraulic hose life.
Both should be considered:
- Hydraulic fluid temperature
- Ambient temperature
The temperature rating of the selected hose must be suitable for the actual operating conditions.
A hose designed for standard temperatures should not automatically be used in high-temperature applications.
Alfagomma provides dedicated technical information for hydraulic hose selection and application.
- Hydraulic Fluid Compatibility
The hose must be compatible with the hydraulic fluid being used.
Different hydraulic fluids and additives can affect the inner tube material differently.
Before selecting a hose, check:
- Hydraulic oil type
- Fluid temperature
- Additives
- Hose inner tube material
- Manufacturer compatibility information
Alfagomma provides an oil compatibility table covering different hose constructions and hydraulic fluids.
Minimum Bend Radius of Hydraulic Hose
The minimum bend radius is one of the most frequently overlooked parameters when installing hydraulic hoses.
If a hose is bent below its specified minimum bend radius, excessive stress can be introduced into the reinforcement and inner tube.
This can reduce service life and increase the risk of premature failure.
Hose routing should therefore account for:
- Static bending
- Dynamic movement
- Machine vibration
- Thermal expansion
- Relative movement between components
A hose that works correctly in a static installation may require a different configuration when used in a continuously moving application.
Alfagomma Hydraulic Hose Fittings
A hydraulic hose is only as reliable as the complete hose assembly.
The correct combination of:
hose + fitting + ferrule + crimp diameter + installation
is essential.
Alfagomma provides a broad range of hydraulic fittings and adapters, including:
- BSP
- NPT
- Metric
- JIC
- ORFS
- SAE
- Staple connections
The manufacturer also offers carbon steel and stainless steel fitting solutions.
Using an incorrect fitting or crimp specification can result in leakage, hose separation or premature failure.
Alfagomma Hydraulic Hose Assembly and Crimping
Correct crimping is critical when manufacturing a hydraulic hose assembly.
The correct crimping diameter depends on the exact combination of:
- Hose model
- Hose size
- Fitting model
- Ferrule
- Crimping method
A universal crimp diameter should never be assumed for all Alfagomma hoses.
Alfagomma provides dedicated crimping information and a technical database for its hose and fitting combinations.
For professional hydraulic hose assembly, the manufacturer's current crimping specifications should be used.
Common Hydraulic Hose Installation Mistakes
Even a high-quality hydraulic hose can fail prematurely if it is incorrectly installed.
Common problems include:
Excessive bending
Installing a hose below the recommended bend radius can damage the reinforcement structure.
Hose twisting
A hydraulic hose should not be installed under torsional stress.
Incorrect hose length
A hose that is too short can experience excessive tension during machine movement.
A hose that is excessively long can increase the risk of abrasion, pressure loss and uncontrolled movement.
Poor hose routing
Hoses should be routed away from sharp edges, excessive heat and moving components where possible.
Incorrect fitting
The fitting must be compatible with both the hose and the hydraulic system connection.
Incorrect crimping
Under-crimping and over-crimping can both create serious assembly problems.
Hydraulic Hose Protection
In demanding applications, additional hose protection may be required.
Depending on the operating environment, protection can include:
- Spiral hose guards
- Abrasion sleeves
- Protective covers
- Fire-resistant protection
- Clamps
- Hose routing systems
Alfagomma also offers hose guard solutions designed to protect hydraulic hoses against external abrasion and hazardous environmental conditions.
Protection should be selected according to the actual risk rather than added without considering hose movement and heat dissipation.
Alfagomma Hydraulic Hose Applications
Alfagomma hydraulic hoses are used in a wide range of mobile and industrial applications.
Typical sectors include:
- Construction machinery
- Agricultural machinery
- Mining equipment
- Hydraulic presses
- Industrial automation
- Steel industry
- Energy equipment
- Mobile hydraulics
- Hydraulic power units
- Lifting equipment
- Material handling equipment
- OEM machinery
The manufacturer's hydraulic portfolio is specifically positioned for both mobile and industrial applications.
Hydraulic Hose Maintenance
Regular inspection can help identify potential problems before a hose failure occurs.
Inspect hydraulic hoses for:
- Oil leakage
- Cracks
- Abrasion
- Bulging
- Cuts
- Exposed reinforcement wires
- Excessive bending
- Damaged fittings
- Signs of overheating
A damaged hydraulic hose should not simply be repaired with temporary methods if the hose assembly is no longer safe for service.
The correct replacement should be selected according to the original operating requirements.
Alfagomma provides technical guidance covering hydraulic hose selection, storage, use and maintenance.
Alfagomma Hydraulic Hose for European Industrial Applications
For European hydraulic equipment manufacturers and industrial users, selecting a hose according to recognised EN and ISO standards can simplify technical specification and product selection.
Depending on the application, specifications may reference:
EN 853 → 1SN / 2SN
EN 857 → 1SC / 2SC
EN 856 → 4SP / 4SH / R12 / R13
ISO 1436 → Wire braid hydraulic hoses
ISO 11237 → Compact hydraulic hoses
ISO 18752 → High-performance isobaric hydraulic hoses
The exact classification should always be confirmed against the current manufacturer's technical documentation.
Alfagomma Hydraulic Hose Supplier and Hose Assembly
Choosing the right supplier is important when purchasing hydraulic hose assemblies for industrial or OEM applications.
A professional hydraulic hose supplier should be able to support:
- Hose selection
- Technical specification
- Hose and fitting compatibility
- Correct crimping
- Hose identification
- Pressure testing
- Assembly documentation
- Replacement hose identification
- OEM hose production
At Hidroman, we provide hydraulic hose solutions for industrial and mobile hydraulic applications, including hose selection, hose assembly, fitting selection and testing.
For critical applications, we recommend evaluating the complete hose assembly rather than purchasing the hose and fittings separately.
Why Technical Hose Selection Matters
The cheapest hydraulic hose is not necessarily the most economical solution.
A premature hose failure can cause:
- Machine downtime
- Hydraulic oil loss
- Production interruption
- Maintenance costs
- Safety risks
- Unplanned replacement costs
A properly specified hydraulic hose can contribute to improved reliability and longer service life.
The objective should therefore be:
The right hose + the right fitting + the right assembly + the right installation.
Frequently Asked Questions About Alfagomma Hydraulic Hose
Is Alfagomma a hydraulic hose manufacturer?
Yes. Alfagomma has a broad hydraulic product portfolio covering hoses, fittings, adapters, quick couplings and related components. The company states that it has been producing and distributing products globally for more than 60 years.
What standards are used for Alfagomma hydraulic hoses?
Depending on the hose family, Alfagomma products are associated with standards including EN 853, EN 854, EN 856, EN 857, ISO 1436, ISO 11237, ISO 18752 and SAE J517.
What is the difference between 1SN and 2SN hydraulic hose?
The main difference is the reinforcement construction. 1SN uses a single wire braid, while 2SN uses two wire braid reinforcement layers. The appropriate hose depends on the required pressure and application conditions.
What is the difference between 4SP and 4SH?
Both are multispiral high-pressure hydraulic hose classifications associated with EN 856. The correct selection depends on the pressure, impulse conditions, temperature, bend radius and application requirements.
What is an ISO 18752 hydraulic hose?
ISO 18752 defines requirements and classifications for certain hydraulic hose constructions and performance levels. Alfagomma offers several multispiral isobaric hose families associated with ISO 18752.
How do I select the correct hydraulic hose size?
Hose size should primarily be selected according to the required flow rate and acceptable fluid velocity, while also considering pressure, temperature, routing and connection requirements.
Can Alfagomma hydraulic hoses be used with different hydraulic oils?
Fluid compatibility depends on the specific hose construction and hydraulic fluid. Always check the manufacturer's compatibility information before selecting the hose. Alfagomma provides an oil compatibility reference for its hydraulic hose products.
How should Alfagomma hydraulic hoses be crimped?
The hose and fitting combination should be matched according to the manufacturer's current crimping specifications. Crimp diameter should not be estimated or transferred from another hose/fitting combination.
Conclusion
Selecting an Alfagomma hydraulic hose is not simply a matter of choosing a hose with the highest pressure rating.
The correct solution depends on the complete application:
Pressure + flow rate + temperature + hydraulic fluid + bend radius + movement + fittings + installation environment.
Alfagomma's extensive hydraulic hose portfolio provides solutions ranging from standard wire braid hoses to compact, multispiral, thermoplastic and PTFE constructions. Its product portfolio also includes hydraulic fittings, adapters and hose protection solutions.
For European hydraulic applications, selecting products according to the appropriate EN, ISO and SAE standards can help ensure that the hose specification matches the technical requirements of the hydraulic system.
If you are looking for Alfagomma hydraulic hoses, hydraulic hose assemblies, high-pressure hydraulic hoses or custom hydraulic hose solutions, Hidroman can support you with technical hose selection, fitting configuration, assembly and testing.
Contact Hidroman for your hydraulic hose requirements and technical quotation.