High Pressure Grease Hose

Product Overview

A High Pressure Grease Hose is a specialized flexible conduit designed to safely transport grease and other high-viscosity lubricants under extreme pressure within automated lubrication systems. By definition, this rubber hose consists of a black oil-resistant synthetic rubber tube, reinforced with one or two high tensile steel wire braids, and covered with a black abrasion and weather-resistant synthetic rubber outer layer. This construction ensures reliable performance in the most demanding industrial environments, from china’s manufacturing hubs to global mining sites.

The core structure of this Wire Braided Hose features a seamless synthetic rubber tube, a single or double layer of high-tensile steel wire braiding for reinforcement, and a durable synthetic rubber cover. This design directly addresses the common failure points of standard hoses, such as bursting under pressure spikes or degrading due to ozone and abrasion. For engineers and procurement managers, understanding this specification is the first step toward a reliable hydraulic solution.

Key performance parameters include a broad temperature range from -40°C to +121°C, making it suitable for arctic and high-heat applications. Working pressures reach up to 400 bar (5800 psi) for the 2-wire version, with a 4:1 safety factor (bursting pressure at four times the working pressure). This High Pressure Hose also maintains a tight bend radius, simplifying Assembly in compact machinery. For example, the PGH64-2 model handles 400 bar, bursting at 1600 bar, while maintaining a 102mm bend radius.

Compared to standard hoses, this product offers four core advantages. First, its superior pulse life, validated by tests exceeding 200,000 cycles, reduces unexpected downtime. Second, the wire reinforcement provides excellent kink resistance and flexibility for easy routing. Third, the outer cover is highly resistant to abrasion, oil, and weather, ensuring a long service life in harsh conditions. Fourth, it supports OEM ODM customization for fittings, length, and branding, backed by full support from a professional manufacturer.

Primary applications include high pressure grease delivery for construction equipment (excavators, loaders), mining machinery (rock drills, hydraulic supports), metallurgical forging presses, shipboard machinery, injection molding machines, and agricultural equipment. This hose solves critical pain points for facility managers and contractors, including frequent hose bursts leading to production stoppages, safety hazards from high-pressure fluid leaks, high maintenance cost from short hose life, and compatibility issues with different greases and fittings. By choosing a verified supplier, you mitigate these operational risks.

This hose is manufactured by a leading factory and producer with ISO 9001 certification. Each production batch meets standard EN 853 (or equivalent SAE 100R1/R2) requirements. We offer a full supply chain solution, from raw material traceability to 100% factory testing. For bulk or wholesale inquiries, contact us for a discount. Download the full technical pdf from our website or request a sample to test its quality.

Product Advantages

• Superior High Pressure Capability: Engineered for systems up to 400 bar (5800 psi), eliminating burst risks.
• Exceptional Pulse Fatigue Life: Withstands over 200,000 impulse cycles at 133% working pressure, meeting ISO 6803 standards for long-term reliability.
• Wide Thermal Stability: Reliable operation from -40°C to +121°C, solving cold-start and high-temperature breakdown issues.
• Abrasion & Weather Resistant Cover: The synthetic rubber outer layer resists ozone, UV, and physical wear, ideal for outdoor mining and construction sites.
• Flexible & Kink Resistant: Tight bend radius (e.g., 102mm for 1/4″) simplifies installation in tight machinery compartments.
• Full Compatibility: Works with mineral oils, synthetic hydraulic fluids, water-glycol, and bio-oils. Supports crimped fittings, reusable fittings, adapters, flanges, and protective sleeves.
• OEM ODM & Customization: We are a china-based manufacturer offering custom lengths, branded printing, and tailored hose assembly solutions.

Detailed Technical Specifications Table

Note: Other diameters (3/8″, 1/2″, etc.) available upon request. Request the full specification table in pdf format from our supplier team.

Structure and Materials

• Tube (Inner Layer): Black, oil-resistant, heat-resistant synthetic rubber. Ensures media purity and minimal flow resistance, preventing degradation from grease and hydraulic oils.
• Reinforcement Layer: One or two high tensile steel wire braids. This Wire Braided Hose construction provides the foundational strength to handle high impulse pressures. The 2-wire version (e.g., PGH64-2) delivers double the working pressure.
• Cover (Outer Layer): Black, abrasion-resistant, weather-resistant synthetic rubber. Protects against mechanical damage, ozone cracking, and UV exposure, extending service life in outdoor applications.

Why Choose Wire Braided Over Wire Spiral Hose?

For High Pressure Grease Hose applications (typically under 5800 psi), a Wire Braided Hose offers superior flexibility and a smaller bend radius compared to a Wire Spiral Hose, which is designed for ultra-high pressure (over 6000 psi) and larger diameters. The braided construction balances strength with maneuverability, making it the right solution for lubrication lines on mobile equipment. Always refer to the specification sheet to match the reinforcement type with your system’s maximum pressure.

Application Industries

Primary Sectors

• Construction & Engineering: Excavators, loaders, concrete pump trucks, and hydraulic breakers – where grease lines are subjected to constant vibration and pressure spikes.
• Mining Equipment: Hydraulic roof supports (longwall mining), rock drills, and crushers. The hose’s rugged cover resists sharp rock abrasion.
• Industrial Manufacturing: Injection molding machines, die-casting machines, and presses that require automated grease delivery to platens and linkages.
• Metallurgy & Forging: Steel mills, continuous casters, and forging presses where radiant heat and contamination are common.
• Marine & Offshore: Deck machinery, steering gear systems, and hatch covers – demanding corrosion-resistant fittings and weather-proof covers.
• Agriculture & Forestry: Large tractors, combine harvesters, and timber harvesters needing reliable lubrication in dusty, wet, or muddy fields.

Precise Selection Professional Guide

1. It’s More Than a Hose: The Hose Assembly Solution
A bare rubber hose is only half the product. A complete hose assembly includes crimped fittings, reusable fittings, adapters, or flanges. For high pressure grease, crimped fittings are recommended for a permanent, leak-free seal. We provide:

• Fittings Match Guide: NPT, BSP, JIC (37° flare), and ORFS threads available.
• Assembly Process: Our factory uses computer-controlled crimping machines to ensure precise compression.
• Pre-assembled Advantage: Factory-made assemblies are 100% proof-pressure tested, eliminating field assembly errors.

2. High Pressure Grease Hose vs. World Standards
This High Pressure Hose complies with international standard EN 853 1SN / 2SN, SAE 100R1 / R2, and ISO 1436. When comparing to a Wire Spiral Hose (SAE 100R12/R13), remember:

• Braided (this hose): Higher flexibility, lower cost, ideal for pressures up to 400 bar.
• Spiral: Lower flexibility, higher cost, for pressures >400 bar and extreme pulse applications.
  For 99% of grease systems, a 2-wire braided hose is the optimal choice.

3. Solving Industry Pain Points

• Pain Point: Frequent burst on excavator boom grease lines.
  • Our Solution: The 2-wire braided reinforcement handles pressure spikes up to 1600 bar bursting pressure. Our -40°C to +121°C rubber resists oil thinning at high temps.
• Pain Point: Short hose life in underground coal mines.
  • Our Solution: The abrasion-resistant cover and ability to add protective sleeves or guards extend service life. Request flame-retardant cover options.
• Pain Point: Leaks at fitting connections in freezing environments.
  • Our Solution: Pre-assembled crimped fittings from our factory maintain seal integrity. Use our reusable fittings only for field repairs with proper training.

Technical Standards and Certifications

We are a china-based manufacturer with ISO 9001:2015 certification for quality management. All products are traceable by batch number. Download our test report pdf to review third-party validation.

Brand and Quality Assurance

As a professional producer and distributor with over 15 years of experience, we ensure every meter of High Pressure Grease Hose meets the highest standards.

Visualized Quality Management Process

• Raw Material Incoming Inspection: Testing rubber compounds for tensile strength and hardness. Checking steel wire for tensile consistency.
• Online Production: Real-time monitoring of extrusion (tube concentricity), braiding (wire tension), and vulcanization (temperature/pressure curves).
• 100% Factory Testing: Every hose is hydrostatically tested at 1.5x working pressure for 60 seconds – zero leaks allowed.
• Laboratory Validation: We operate a pulse test bench (ISO 6803) and burst test machine (ISO 1402).

Third-Party Certifications & Customer Testimonials

• Certifications: ISO 9001, CE Marking, and application-specific certifications available upon request.
• Customer Case: “After switching to HENGHUA’s 2-wire braided hose, our injection molding plant’s hydraulic maintenance costs dropped by 50%. No unplanned downtime in 8 months.” – Facility Manager, Germany.

Sustainability & Compliance

• RoHS & REACH Compliant: No restricted substances. Safe for global supply chains.
• Recyclability: The rubber hose and steel wire can be reclaimed at end-of-life, reducing landfill waste.

Installation, Operation, and Maintenance Guide

1. Inspection Before Installation: Check the specification markings. Ensure the High Pressure Grease Hose is free of cuts, kinks, or blisters. Never use a damaged hose.
2. Routing: Maintain the recommended bend radius. Use protective sleeves or guards if the hose will rub against sharp edges or hot surfaces.
3. Fitting Attachment: For crimped fittings, use only the crimper and dies specified by the manufacturer. For reusable fittings, follow the torque sequence exactly. For flanges, use new O-rings each time.
4. Proof Pressure Test: After assembly, test the complete line at 1.5x working pressure. Use safety shields.
5. Operation: Never exceed the working pressure rating. Avoid pressure spikes from rapid valve closure.
6. Maintenance: Inspect regularly for leaks, cover damage, or end fitting corrosion. Replace immediately if bulging or leaks occur.
7. Storage: Store in a cool, dry place away from ozone (e.g., electric motors) and direct sunlight.

Frequently Asked Questions (FAQ)

Q1: What is the definition of a High Pressure Grease Hose?
A: It is a flexible rubber hose with a wire braid reinforcement, specifically designed to safely convey grease under high pressure (up to 5800 psi) in automated lubrication systems.

Q2: Can I buy in bulk and get a discount?
A: Yes. As a wholesale supplier and factory, we offer competitive price and cost savings for bulk orders. Contact us for a discount based on quantity.

Q3: What fittings work best with this hose?
A: For permanent installations, crimped fittings are best. For field repairs where you have training, reusable fittings work. We also provide adapters, flanges, and protective sleeves.

Q4: How do I get the full technical specification PDF?
A: Request the pdf from our support team via email or download it directly from our product page. The specification includes impulse test data and detailed chemical compatibility.

Q5: Are you an exporter? Do you support OEM ODM?
A: Yes, we are a professional exporter and producer. We offer full OEM ODM service including custom printing, packaging, and length manufacturing.

Q6: How does this compare to a Wire Spiral Hose?
A: This Wire Braided Hose is more flexible and cost-effective for pressures up to 400 bar. A Wire Spiral Hose is for ultra-high pressure (>600 bar) and larger diameters. Most grease systems use braided hoses.

Q7: What is the standard working temperature?
A: -40°C to +121°C. This High Pressure Hose maintains flexibility in cold starts and integrity under high-temperature operation.

Ready to supply your operation with reliable, long-life High Pressure Grease Hose?

• Request a Quote: Get a competitive price for bulk or wholesale orders.
• Download the PDF: Receive the full technical specification and test report.
• Ask an Expert: Our engineers can help you select the right hose assembly, fittings, and protective sleeves.

Contact us today for a solution that reduces downtime and lowers your total cost of ownership.