{"id":541,"date":"2026-07-20T02:45:49","date_gmt":"2026-07-20T02:45:49","guid":{"rendered":"https:\/\/n2-compressor.com\/?post_type=product&p=541"},"modified":"2026-07-20T02:48:39","modified_gmt":"2026-07-20T02:48:39","slug":"lw-52-3-nitrogen-compressor","status":"publish","type":"product","link":"https:\/\/n2-compressor.com\/uk\/product\/lw-52-3-nitrogen-compressor\/","title":{"rendered":"LW-52\/3 Nitrogen Compressor \u2013 High-Capacity Oil-Free N2 Booster for Industrial Air Separation"},"content":{"rendered":"
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LW-52\/3 Nitrogen Compressor \u2013 High-Capacity Oil-Free N2 Booster for Industrial Air Separation<\/h1>\n

Delivering 52 m\u00b3\/min at 0.30 MPa discharge pressure, the LW-52\/3 is a two-stage, two-row oil-free piston nitrogen compressor engineered for large-scale cryogenic air separation and VPSA nitrogen generation plants. Zero lubricant contamination, continuous-duty rated, and built for 24\/7 industrial reliability.<\/p>\n

\u0417\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u043e\u0457 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0457<\/a>
\nView N2 Compressor Series<\/a><\/div>\n

\"LW-52\/3<\/p>\n<\/div>\n

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\u041e\u0433\u043b\u044f\u0434 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0443<\/h2>\n

The LW-52\/3 nitrogen compressor<\/strong> is a flagship model in our oil-free piston compressor lineup, purpose-built for nitrogen boosting duties in cryogenic air separation and vacuum pressure swing adsorption (VPSA) systems. With a massive capacity of 52 m\u00b3\/min<\/strong> and a discharge pressure of 0.30 MPa<\/strong>, this unit bridges the gap between primary air separation and downstream nitrogen distribution networks.<\/p>\n

Unlike lubricated alternatives that risk oil contamination in high-purity nitrogen streams, the LW-52\/3 operates on a completely oil-free lubrication system<\/strong>. This design eliminates the need for downstream oil-removal filtration, reduces maintenance complexity, and ensures compliance with stringent purity requirements for food packaging, pharmaceutical blanketing, and electronics manufacturing.<\/p>\n

The compressor features a two-stage, two-row (\u4e8c\u5217\u4e8c\u7ea7)<\/strong> configuration that optimizes thermodynamic efficiency across the pressure ratio. Each stage is independently cooled, maintaining discharge temperatures within safe operating limits even during continuous 24\/7 operation. The robust cast-iron frame and precision-machined crankshaft assembly are rated for over 80,000 hours<\/strong> of service life under standard maintenance protocols.<\/p>\n

\"LW<\/p>\n<\/div>\n

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Technical Specifications \u2013 LW-52\/3<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\nValue<\/th>\nUnit<\/th>\n<\/tr>\n<\/thead>\n
\u041c\u043e\u0434\u0435\u043b\u044c<\/td>\nLW-52\/3<\/td>\n\u2013<\/td>\n<\/tr>\n
\u0412\u0456\u0437\u0435\u0440\u0443\u043d\u043e\u043a<\/td>\nTwo-stage, Two-row (\u4e8c\u5217\u4e8c\u7ea7)<\/td>\n\u2013<\/td>\n<\/tr>\n
\u041c\u0456\u0441\u0442\u043a\u0456\u0441\u0442\u044c<\/td>\n52<\/td>\n\u043c\u00b3\/\u0445\u0432<\/td>\n<\/tr>\n
\u0422\u0438\u0441\u043a \u043d\u0430\u0433\u043d\u0456\u0442\u0430\u043d\u043d\u044f<\/td>\n0.30<\/td>\n\u041c\u041f\u0430<\/td>\n<\/tr>\n
Compressor Size (L \u00d7 W \u00d7 H)<\/td>\n2995 \u00d7 1600 \u00d7 2170<\/td>\nmm<\/td>\n<\/tr>\n
\u0412\u0430\u0433\u0430<\/td>\n4.28<\/td>\nt<\/td>\n<\/tr>\n
\u041f\u043e\u0442\u0443\u0436\u043d\u0456\u0441\u0442\u044c<\/td>\n220<\/td>\n\u043a\u0412\u0442<\/td>\n<\/tr>\n
\u041d\u0430\u043f\u0440\u0443\u0433\u0430<\/td>\n380 \/ 6k or 10k<\/td>\nV<\/td>\n<\/tr>\n
\u0413\u0430\u0437\u043e\u0432\u0435 \u0441\u0435\u0440\u0435\u0434\u043e\u0432\u0438\u0449\u0435<\/td>\nNitrogen (N\u2082)<\/td>\n\u2013<\/td>\n<\/tr>\n
Lubrication<\/td>\n\u0411\u0435\u0437 \u043e\u043b\u0456\u0457<\/td>\n\u2013<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* All specifications are rated at standard reference conditions (ISO 1217, Annex C). Actual performance may vary based on site altitude, ambient temperature, and inlet conditions.<\/em><\/p>\n<\/div>\n

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Key Features & Engineering Advantages<\/h2>\n

1. Oil-Free Piston Technology<\/h3>\n

The LW-52\/3 employs a self-lubricating piston ring and rider band system<\/strong> constructed from advanced PTFE composite materials. This eliminates the risk of hydrocarbon contamination in the nitrogen stream\u2014a critical requirement for food-grade nitrogen (ISO 8573-1 Class 0 oil content) and pharmaceutical applications. The oil-free design also reduces the total cost of ownership by eliminating oil changes, filter replacements, and oil-separation equipment.<\/p>\n

2. Two-Stage Thermodynamic Optimization<\/h3>\n

With a two-stage compression arrangement<\/strong>, the LW-52\/3 splits the overall pressure ratio across two cylinders, reducing the discharge temperature per stage and improving volumetric efficiency. Inter-stage cooling is provided by a dedicated shell-and-tube heat exchanger, maintaining gas temperatures below 160\u00b0C even at maximum continuous load. This thermal management extends valve life and reduces the risk of polymerization in nitrogen streams containing trace oxygen.<\/p>\n

3. Heavy-Duty Frame & Crankshaft<\/h3>\n

The compressor block is cast from GG25 gray cast iron<\/strong> with integral cooling water jackets. The forged steel crankshaft is dynamically balanced to ISO 1940 G2.5 standards, minimizing vibration transmission to the foundation. The two-row configuration provides inherent force balance, reducing the need for massive concrete inertia blocks\u2014an important consideration for retrofit installations in existing air separation plants.<\/p>\n

4. Flexible Voltage Configuration<\/h3>\n

The 220 kW drive motor is available in 380V, 6kV, or 10kV<\/strong> configurations, allowing direct integration into medium-voltage industrial distribution networks without additional step-down transformers. This flexibility is particularly valuable for large-scale air separation facilities where 6kV or 10kV bus systems are standard, reducing electrical infrastructure costs and improving overall energy efficiency.<\/p>\n

\"nitrogen<\/p>\n<\/div>\n

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Application Scenarios<\/h2>\n

Cryogenic Air Separation Plants<\/h3>\n

In cryogenic ASU (Air Separation Unit) facilities, the LW-52\/3 serves as the primary nitrogen booster<\/strong> between the cold box and the gaseous nitrogen distribution header. Its 52 m\u00b3\/min capacity matches the output of medium-scale ASUs producing 1,000\u20132,000 Nm\u00b3\/h of gaseous nitrogen. The 0.30 MPa discharge pressure is optimized for pipeline distribution to downstream consumers such as steel mills, chemical plants, and LNG liquefaction facilities.<\/p>\n

\"nitrogen<\/p>\n

VPSA Nitrogen Generation Systems<\/h3>\n

For VPSA nitrogen generator<\/a> installations, the LW-52\/3 compresses the low-pressure nitrogen product (typically 0.05\u20130.10 MPa) to distribution pressure. The oil-free design is essential here because VPSA systems produce nitrogen at relatively high purity (99.5\u201399.9%), and any oil contamination would degrade the product quality and damage downstream molecular sieves.<\/p>\n

Petrochemical & Refinery Blanketing<\/h3>\n

Refinery tank farms and petrochemical storage facilities require large volumes of nitrogen for tank blanketing and inerting<\/strong> to prevent explosive vapor formation. The LW-52\/3’s continuous-duty rating and high flow capacity make it ideal for serving multiple storage tanks simultaneously through a centralized nitrogen header. The 0.30 MPa pressure is sufficient to overcome tank pressure relief valve settings and maintain positive pressure during product withdrawal cycles.<\/p>\n

\"nitrogen<\/p>\n

Food Packaging & Modified Atmosphere<\/h3>\n

In food packaging lines using modified atmosphere packaging (MAP)<\/strong>, nitrogen displaces oxygen to extend shelf life. The LW-52\/3’s oil-free certification ensures compliance with FDA 21 CFR and EU 1935\/2004 food contact regulations. The high flow rate supports multiple packaging machines operating in parallel, making it suitable for large-scale snack food, dairy, and ready-meal production facilities.<\/p>\n<\/div>\n

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Material & Construction<\/h2>\n

The LW-52\/3 is built from materials selected for compatibility with nitrogen service and long-term industrial durability:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Component<\/th>\n\u041c\u0430\u0442\u0435\u0440\u0456\u0430\u043b<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Cylinder Block<\/td>\nGray Cast Iron<\/td>\nGG25 \/ HT250<\/td>\n<\/tr>\n
Crankshaft<\/td>\nForged Alloy Steel<\/td>\n42CrMo4, Q&T<\/td>\n<\/tr>\n
Piston Rings<\/td>\nPTFE Composite<\/td>\nSelf-lubricating, oil-free<\/td>\n<\/tr>\n
Valve Plates<\/td>\nStainless Steel<\/td>\nSS304 \/ SS316<\/td>\n<\/tr>\n
Cooling Water Jackets<\/td>\nCast Iron with Epoxy Lining<\/td>\nCorrosion-resistant<\/td>\n<\/tr>\n
Intercooler<\/td>\nCarbon Steel Shell \/ SS Tubes<\/td>\nASME VIII Div.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All pressure-bearing components are designed to ASME BPVC Section VIII Division 1<\/strong> or equivalent Chinese GB 150 standards. Weld joints undergo 100% radiographic inspection (RT) and hydrostatic testing at 1.5\u00d7 design pressure before shipment.<\/p>\n

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Installation & Maintenance Guidelines<\/h2>\n

Foundation Requirements<\/h3>\n

The LW-52\/3 weighs 4.28 tonnes and generates minimal unbalanced forces due to its two-row opposed-cylinder design. A reinforced concrete inertia block<\/strong> of minimum 8 tonnes is recommended, mounted on vibration isolation pads (natural frequency < 8 Hz). The foundation must support the full weight plus a dynamic factor of 1.5. Allow minimum 1.5m clearance on all sides for maintenance access.<\/p>\n

Cooling Water System<\/h3>\n

Cooling water flow requirement is approximately 45 m\u00b3\/h<\/strong> at 32\u00b0C inlet temperature. Water quality should meet industrial standards: pH 6.5\u20138.5, total hardness < 300 mg\/L as CaCO\u2083, suspended solids < 50 mg\/L. A closed-loop cooling tower with side-stream filtration is recommended for tropical climates to prevent scale formation in intercooler tubes.<\/p>\n

Maintenance Schedule<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Interval<\/th>\nService Item<\/th>\nAction<\/th>\n<\/tr>\n<\/thead>\n
Daily<\/td>\nVisual Inspection<\/td>\nCheck oil levels, leaks, abnormal noise<\/td>\n<\/tr>\n
250 hours<\/td>\nFilter & Valve Check<\/td>\nInspect suction\/discharge valves for carbon buildup<\/td>\n<\/tr>\n
1,000 hours<\/td>\nPiston Ring Inspection<\/td>\nMeasure ring groove clearance, replace if > 0.3mm<\/td>\n<\/tr>\n
4,000 hours<\/td>\nMajor Overhaul<\/td>\nReplace piston rings, rider bands, valve plates<\/td>\n<\/tr>\n
8,000 hours<\/td>\nCrankshaft & Bearing<\/td>\nInspect main bearings, measure crankshaft runout<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Because the LW-52\/3 is oil-free, the maintenance burden is significantly lower than lubricated alternatives. There are no oil filters to replace, no oil analysis to perform, and no oil separator elements to monitor. The primary wear items are the PTFE piston rings and rider bands<\/strong>, which typically last 4,000\u20136,000 hours depending on operating conditions.<\/p>\n

\"nitrogen<\/p>\n<\/div>\n

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Compliance & Safety Certifications<\/h2>\n

The LW-52\/3 nitrogen compressor meets or exceeds the following international standards and regulatory requirements:<\/p>\n

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Pressure Equipment<\/strong>
\nASME BPVC Section VIII Div.1, GB 150, PED 2014\/68\/EU (Module A)<\/span><\/div>\n
Electrical Safety<\/strong>
\nIEC 60034-1 (Rotating Machines), IEC 60204-1 (Machine Safety)<\/span><\/div>\n
Oil-Free Certification<\/strong>
\nISO 8573-1 Class 0 (Oil Content), T\u00dcV Rheinland Tested<\/span><\/div>\n
Quality Management<\/strong>
\nISO 9001:2015, ISO 14001:2015<\/span><\/div>\n<\/div>\n
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\u26a0\ufe0f Safety Notice<\/strong><\/p>\n

Nitrogen is an asphyxiant gas. All LW-52\/3 installations must include oxygen deficiency monitoring in enclosed compressor rooms. Ventilation rates must maintain oxygen levels above 19.5% per OSHA 29 CFR 1910.146. Emergency shutdown systems should be tied to O\u2082 sensors with automatic alarm at 19.5% and hard shutdown at 18.0%.<\/p>\n<\/div>\n

\"nitrogen<\/p>\n<\/div>\n

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Performance & Efficiency Analysis<\/h2>\n

The LW-52\/3 achieves a specific power consumption of approximately 4.23 kW per m\u00b3\/min<\/strong> of nitrogen delivered at 0.30 MPa. This places it in the top quartile of efficiency for oil-free piston compressors in this capacity range. For comparison, typical lubricated screw compressors in similar applications consume 4.5\u20135.0 kW\/m\u00b3\/min, while older single-stage piston designs may exceed 5.5 kW\/m\u00b3\/min.<\/p>\n

Over an 8,000-hour annual operating cycle, the LW-52\/3’s efficiency advantage translates to approximately 180,000\u2013350,000 kWh of energy savings<\/strong> versus less efficient alternatives. At an industrial electricity rate of $0.08\/kWh, this represents $14,400\u2013$28,000 in annual operating cost reduction\u2014often recovering the incremental capital investment within 2\u20133 years.<\/p>\n

The total cost of ownership for nitrogen compression<\/a> is further reduced by the elimination of oil-related consumables. A typical lubricated compressor of this size consumes 200\u2013400 liters of lubricating oil annually, plus oil filter elements, separator cartridges, and waste oil disposal costs. The LW-52\/3’s oil-free design eliminates these recurring expenses entirely.<\/p>\n<\/div>\n

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Customization & OEM Capabilities<\/h2>\n

Beyond the standard LW-52\/3 configuration, we offer extensive customization to match specific plant requirements:<\/p>\n