QISHANR 4GS High Viscosity Mineral Refrigeration Oil 1L - ISO 56 Naphthenic Compressor Lubricant

Company Introduction

Guangzhou Qishanr Technologies Co., Ltd. is a professional manufacturer and supplier focusing on R&D, production and sales of high-performance refrigeration lubricants, base oils and functional additives. With over 10 years of production experience, our self-owned brand QISHANR features excellent compatibility and interchangeability with mainstream compressors. Our products are SGS certified and comply with international industry standards, widely used in air conditioning, ultra-low temperature refrigeration and heat pump systems. We provide professional model selection technical support and flexible OEM / ODM customization services, delivering reliable and cost-effective lubrication solutions for global customers.

QISHANR 4GS Refrigeration Oil Overview

QISHANR 4GS belongs to the GS Series (Naphthenic Mineral Refrigeration Oil) product line, formulated with selected highly-refined naphthenic base oils. As the ISO VG 56 heavy-grade member of the series, 4GS delivers approximately twice the kinematic viscosity of the 3GS grade (56 cSt vs. 29 cSt @40°C), making it the optimal choice for larger compressors and higher-temperature operating conditions where superior bearing film strength is required. Its wax-free composition ensures reliable low-temperature fluidity down to -33°C, while the elevated viscosity and 185°C flash point provide robust protection under sustained heavy loads. Fully interchangeable with Suniso 4GS/4GSD specifications, and cross-referenced with Hanbell HBR-A01, York/Frick C, McQuay C, and Fusheng FS055M.

Key Features & Benefits

• High Viscosity (ISO VG 56): With 56 cSt kinematic viscosity at 40°C, 4GS provides superior film strength at elevated operating temperatures, specifically engineered for larger screw and reciprocating compressors with higher bearing loads where ISO VG 32 is insufficient.
• Excellent Chemical Stability: Maintains chemical integrity when interacting with refrigerants and metal components across a wide temperature range, ensuring long-term system reliability in demanding commercial applications.
• Outstanding Thermal Stability: High 185°C flash point resists thermal breakdown at compressor discharge temperatures, eliminating carbon deposits at valves and discharge ports in larger commercial and industrial compressors.
• Wax-Free Naphthenic Formula: Prevents separation of flocculent wax from the oil-refrigerant mixture at low-temperature points, maintaining clean system operation and reliable oil return.
• Low Pour Point (-33°C): Maintains reliable fluidity in refrigerant lines under cold operating conditions, ensuring proper oil circulation and compressor lubrication during cold starts and low-temperature cycles.
• High Dielectric Strength: Provides excellent electrical insulating properties for hermetic and semi-hermetic compressor motor windings, safe for direct-contact motor cooling designs.
• Prevents Deposit Formation: Protects bearing surfaces from varnish and sludge, prevents plugging of oil ports and capillary lines, and eliminates general system deterioration for extended service intervals.
• OEM Equivalent Cross-Reference: Direct replacement for Hanbell HBR-A01, York/Frick C, McQuay C, Fusheng FS055M, and fully interchangeable with Suniso 4GS/4GSD specifications.

Technical Specifications

Applications & Refrigerant Compatibility

Compatible Refrigerants: CFCs (R12, R502), HCFCs (R22), R717 (Ammonia), R600a (Isobutane), R290 (Propane), and other traditional refrigerants.

Compressor Types: Particularly suited for larger screw and reciprocating compressors in heavy-duty commercial and industrial applications where ISO VG 56 viscosity grade is specified. Also compatible with scroll compressors in commercial HVAC systems requiring higher viscosity lubrication.

Typical Applications:

• Large commercial refrigeration systems (supermarkets, cold storage warehouses, food processing plants)
• Industrial refrigeration and process cooling equipment with high compressor loads
• Commercial air conditioning and heat pump systems with elevated operating temperatures
• Hermetic and semi-hermetic compressor units requiring ISO 56 viscosity grade

OEM Equivalent Cross-Reference

QISHANR 4GS is a direct replacement for the following OEM-specified ISO 56 mineral refrigeration oils:

For additional OEM cross-references or to confirm compatibility with your specific compressor model, please contact our technical support team with your compressor make, model, and current oil specification.

Why Choose QISHANR 4GS?

• Proven Quality: SGS certified, meeting international refrigeration industry standards. Our independently developed synthetic base oils ensure reliable batch-to-batch consistency across the entire GS series product line.
• Viscosity Selection Guidance: Our senior engineering team helps you select between 3GS (ISO VG 32, 29 cSt) for standard-duty applications and 4GS (ISO VG 56, 56 cSt) for heavy-duty compressors requiring higher film strength and elevated temperature performance.
• Global Supply Chain: Annual production capacity of 6,000 tons across the full lubricant portfolio. Established partnerships with international base oil suppliers guarantee stable raw material supply and consistent product quality.
• OEM & Customization: Support personalized packaging design, material selection, and private label services. Custom viscosity blending and OEM specification matching available upon request.
• Complete Export Documentation: Provide MSDS, Certificate of Origin (CO), CE certification, and transportation identification reports for smooth international shipping and customs clearance.
• Flexible Logistics: Sea freight, land transport, air freight, and express delivery options available. Direct factory-to-destination port or door-to-door service with competitive freight rates.

Frequently Asked Questions

Q: What is the difference between QISHANR 3GS and 4GS?
A: The primary difference is viscosity. 4GS has a kinematic viscosity of 56 cSt @40°C (ISO VG 56), approximately double that of 3GS at 29 cSt (ISO VG 32). 4GS is designed for larger compressors and applications requiring higher film strength and elevated temperature operation. Additionally, 4GS has a higher flash point (185°C vs. 175°C) for better high-temperature stability. Our technical team can help you select the correct viscosity grade for your specific compressor model and operating conditions.

Q: Can QISHANR 4GS replace Suniso 4GS or other OEM oils?
A: Yes. QISHANR 4GS is fully interchangeable with Suniso 4GS/4GSD and cross-referenced with major OEM specifications including Hanbell HBR-A01, York/Frick C, McQuay C, and Fusheng FS055M. If your compressor specifies an ISO VG 56 mineral refrigeration oil, QISHANR 4GS is a direct-fit replacement. Contact us with your compressor model for a confirmed compatibility analysis.

Q: Is QISHANR 4GS suitable for ammonia (R717) refrigeration systems?
A: Yes. QISHANR 4GS is fully compatible with R717 (ammonia) industrial refrigeration systems. Its higher viscosity (56 cSt) provides excellent lubrication in ammonia compressors which typically operate at higher discharge temperatures. The naphthenic base oil ensures good miscibility and chemical stability with ammonia refrigerant across the full operating temperature range.

Q: Can QISHANR 4GS be mixed with 3GS or other mineral refrigeration oils?
A: Mineral refrigeration oils of the same type (MO) can generally be mixed without adverse chemical reactions. However, mixing 4GS (ISO VG 56) with a lighter grade like 3GS (ISO VG 32) will alter the final viscosity and may compromise lubrication performance. We recommend a complete oil change when switching grades to ensure the compressor receives the specified viscosity. For retrofits or top-ups, consult our technical team for guidance.

Q: Do you support third-party testing?
A: Yes, we fully support third-party quality testing to verify that QISHANR 4GS meets required specifications before application. SGS and other accredited laboratory testing reports are available upon request.

Q: What packaging sizes are available for QISHANR 4GS?
A: Standard packaging includes 1L, 4L, 5L, 18.9L, 20L, and 200L options. Custom packaging sizes can be arranged for bulk orders. All packaging is sealed to prevent moisture ingress during storage and transport.

Q: How can I place an order or request a sample?
A: Contact us directly through our website inquiry form, email, or phone. We provide product samples for evaluation and offer competitive pricing for bulk orders. Our technical team can assist with viscosity grade selection between our 3GS (ISO VG 32) and 4GS (ISO VG 56) grades based on your specific compressor requirements.