{"id":553,"date":"2026-07-20T05:30:00","date_gmt":"2026-07-20T05:30:00","guid":{"rendered":"https:\/\/n2-compressor.com\/?post_type=product&p=553"},"modified":"2026-07-20T05:30:00","modified_gmt":"2026-07-20T05:30:00","slug":"lw-50-8-nitrogen-compressor","status":"publish","type":"product","link":"https:\/\/n2-compressor.com\/ru\/product\/lw-50-8-nitrogen-compressor\/","title":{"rendered":"LW-50\/8 Nitrogen Compressor \u2013 High-Flow Oil-Free N2 Booster for Medium-Pressure Industrial Distribution"},"content":{"rendered":"
\n

<\/p>\n

\n

LW-50\/8 Nitrogen Compressor \u2013 High-Flow Oil-Free N2 Booster for Medium-Pressure Industrial Distribution<\/h1>\n

Engineered to deliver 50 m\u00b3\/min at 0.80 MPa discharge pressure, the LW-50\/8 is a two-stage, two-row oil-free piston nitrogen compressor purpose-built for large-scale cryogenic air separation backup, high-pressure VPSA nitrogen boosting, and extensive industrial pipeline distribution networks. Zero lubricant contamination, continuous-duty rated, and optimized for demanding 24\/7 industrial environments.<\/p>\n

Request a Quote<\/a>
\nView N2 Compressor Series<\/a><\/div>\n

\"LW-50\/8<\/p>\n<\/div>\n

<\/p>\n

\n

\u041e\u0431\u0437\u043e\u0440 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0430<\/h2>\n

The LW-50\/8 nitrogen compressor<\/strong> stands as a high-capacity workhorse within our oil-free piston compressor lineup, engineered to bridge the demanding gap between primary nitrogen generation and medium-pressure distribution infrastructure. With an impressive rated capacity of 50 m\u00b3\/min<\/strong> coupled with a robust discharge pressure of 0.80 MPa<\/strong>, this unit addresses the most challenging requirements of large-scale cryogenic air separation plants, high-pressure VPSA booster stations, and extensive petrochemical pipeline networks.<\/p>\n

What fundamentally differentiates the LW-50\/8 from conventional lubricated compressors is its entirely oil-free compression pathway<\/strong>. The piston rings and rider bands are precision-crafted from advanced self-lubricating PTFE composite formulations that function without any hydrocarbon-based lubricants. This intrinsic design ensures the nitrogen stream remains completely devoid of oil contamination\u2014a non-negotiable attribute for applications mandating ISO 8573-1 Class 0 certification, encompassing food packaging nitrogen, pharmaceutical inerting, semiconductor process gas delivery, and high-purity chemical blanketing.<\/p>\n

The compressor architecture implements a two-stage, two-row (\u4e8c\u5217\u4e8c\u7ea7)<\/strong> configuration that strategically partitions the total pressure ratio across dual compression cylinders. This staged methodology reduces per-stage discharge temperatures, enhances volumetric efficiency, and significantly prolongs the operational lifespan of valves and piston rings. Each compression stage incorporates an independent intercooler, maintaining gas temperatures within safe thermal envelopes even during sustained maximum-load continuous operation. The reinforced cast-iron frame and precision-machined forged steel crankshaft assembly are rated for exceeding 100,000 hours<\/strong> of reliable service under standard preventive maintenance protocols.<\/p>\n

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

<\/p>\n

\n

Technical Specifications \u2013 LW-50\/8<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\nUnit<\/th>\n<\/tr>\n<\/thead>\n
\u041c\u043e\u0434\u0435\u043b\u044c<\/td>\n\u041b\u0412-50\/8<\/td>\n\u2013<\/td>\n<\/tr>\n
\u0428\u0430\u0431\u043b\u043e\u043d<\/td>\nTwo-stage, Two-row (\u4e8c\u5217\u4e8c\u7ea7)<\/td>\n\u2013<\/td>\n<\/tr>\n
\u0415\u043c\u043a\u043e\u0441\u0442\u044c<\/td>\n50<\/td>\n\u043c\u00b3\/\u043c\u0438\u043d<\/td>\n<\/tr>\n
\u0414\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 \u0432\u044b\u0445\u043e\u0434\u0435<\/td>\n0.80<\/td>\n\u041c\u041f\u0430<\/td>\n<\/tr>\n
Compressor Size (L \u00d7 W \u00d7 H)<\/td>\n2630 \u00d7 1600 \u00d7 2235<\/td>\nmm<\/td>\n<\/tr>\n
\u041c\u0430\u0441\u0441\u0430<\/td>\n6.50<\/td>\nt<\/td>\n<\/tr>\n
\u0412\u043b\u0430\u0441\u0442\u044c<\/td>\n350<\/td>\n\u043a\u0412\u0442<\/td>\n<\/tr>\n
\u041d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435<\/td>\n380 \/ 6k or 10k<\/td>\nV<\/td>\n<\/tr>\n
\u0413\u0430\u0437\u043e\u0432\u0430\u044f \u0441\u0440\u0435\u0434\u0430<\/td>\nNitrogen (N\u2082)<\/td>\n\u2013<\/td>\n<\/tr>\n
Lubrication<\/td>\n\u0411\u0435\u0437 \u043c\u0430\u0441\u043b\u0430<\/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

<\/p>\n

\n

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

1. Advanced Oil-Free PTFE Composite Sealing System<\/h3>\n

The LW-50\/8 deploys a proprietary self-lubricating piston ring and rider band assembly<\/strong> manufactured from high-density PTFE composites reinforced with glass fiber and bronze particulate additives. This advanced material matrix achieves a dynamic coefficient of friction below 0.07 without any external hydrocarbon lubrication, completely eliminating the risk of oil vapor carryover into the nitrogen product stream. For industrial buyers operating within regulated sectors, this translates directly to ISO 8573-1 Class 0 compliance<\/strong> without the substantial capital investment and ongoing maintenance burden associated with downstream oil-filtration, coalescing, and activated carbon purification systems.<\/p>\n

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

The two-stage compression architecture<\/strong> of the LW-50\/8 is thermodynamically calibrated for the 0.80 MPa discharge pressure target. By distributing the pressure ratio between a dedicated low-pressure cylinder and a high-pressure cylinder, the compressor achieves a substantially lower mean effective temperature per individual stage. An engineered shell-and-tube intercooler positioned between stages efficiently removes the heat of compression, maintaining discharge temperatures consistently below 150\u00b0C even at maximum continuous rated load. This sophisticated thermal management strategy extends valve plate operational life by approximately 40% compared to single-stage compressors subjected to equivalent overall pressure ratios, while simultaneously reducing the risk of thermal polymerization in nitrogen streams containing trace oxygen impurities.<\/p>\n

3. Heavy-Duty Force-Balanced Frame Construction<\/h3>\n

The main compressor block is cast from GG25 gray cast iron<\/strong> (equivalent to ASTM A48 Class 30B) featuring integral cooling water passages machined directly into the casting. The two-row opposed-cylinder arrangement delivers inherent first-order force cancellation, reducing the unbalanced inertial forces transmitted to the foundation by over 85% compared to conventional single-row designs. This mechanical advantage permits the LW-50\/8 to operate on a substantially lighter foundation block (minimum 10 tonnes versus 16+ tonnes for comparable single-row equivalents), significantly reducing civil engineering expenditure and simplifying retrofit installations within existing compressor houses or air separation facilities.<\/p>\n

4. Flexible Multi-Voltage Motor Configuration<\/h3>\n

The LW-50\/8 is driven by a 350 kW high-efficiency three-phase induction motor<\/strong> available in 380V, 6kV, or 10kV configurations conforming to IEC 60034-1 IE3 efficiency class. The 380V option integrates seamlessly into existing low-voltage industrial distribution infrastructure, while the 6kV and 10kV variants enable direct connection to medium-voltage bus systems prevalent in large-scale air separation and petrochemical facilities. This voltage flexibility eliminates the necessity for additional step-down transformers in medium-voltage environments, reducing electrical infrastructure capital costs and improving overall system energy efficiency by minimizing transformer losses.<\/p>\n

\"LW-50\/8<\/p>\n<\/div>\n

<\/p>\n

\n

Application Scenarios<\/h2>\n

Large-Scale Cryogenic Air Separation Backup & Peak Shaving<\/h3>\n

Within cryogenic ASU operations, the LW-50\/8 functions as a high-capacity backup nitrogen booster<\/strong> or peak-shaving compressor of exceptional reliability. When the primary air separation unit encounters a cold box upset, molecular sieve contamination event, or scheduled maintenance outage, the LW-50\/8 can seamlessly maintain nitrogen supply to critical downstream consumers drawing from liquid nitrogen storage vaporizers. Its substantial 0.80 MPa discharge pressure provides ample head for feeding medium to high-pressure distribution headers serving steel mill inerting systems, chemical reactor blanketing, LNG plant purge gas networks, and pipeline injection stations. The oil-free design assumes paramount importance in backup scenarios where nitrogen purity integrity cannot be compromised during primary system unavailability.<\/p>\n

\"LW-50\/8<\/p>\n

High-Pressure VPSA Nitrogen Booster Stations<\/h3>\n

Vacuum Pressure Swing Adsorption (VPSA) nitrogen generators produce gaseous nitrogen at near-atmospheric pressure (typically 0.05\u20130.10 MPa). The LW-50\/8 nitrogen booster<\/a> compresses this low-pressure product to 0.80 MPa for distribution to demanding point-of-use applications. The oil-free compression pathway is absolutely critical in VPSA service because any hydrocarbon contamination would irreversibly poison the carbon molecular sieve adsorbent, permanently degrading the nitrogen generator’s separation efficiency and necessitating costly complete adsorbent bed replacement. The 50 m\u00b3\/min capacity matches the output of large VPSA installations producing 2,000\u20133,000 Nm\u00b3\/h of 99.5\u201399.9% purity nitrogen.<\/p>\n

Petrochemical & Refinery High-Pressure Pipeline Injection<\/h3>\n

Refinery tank farms, petrochemical storage terminals, and chemical process plants require substantial volumes of nitrogen for high-pressure tank blanketing, pipeline inerting, and process vessel purging<\/strong> to prevent explosive vapor formation and maintain product integrity. The LW-50\/8’s 0.80 MPa discharge pressure delivers adequate head to overcome significant pipeline friction losses over distances exceeding 3 km, making it eminently suitable for centralized nitrogen supply architectures serving multiple process units, storage tanks, and loading stations simultaneously. The continuous-duty rating and high flow capacity ensure uninterrupted nitrogen availability during extended maintenance campaigns that may span several weeks.<\/p>\n

\"LW-50\/8<\/p>\n

Food & Beverage High-Speed Modified Atmosphere Packaging<\/h3>\n

Large-scale food packaging facilities operating high-speed production lines require substantial nitrogen flow for modified atmosphere packaging (MAP)<\/strong>, controlled atmosphere storage, and nitrogen flushing of packaging equipment. The LW-50\/8’s impressive 50 m\u00b3\/min capacity can simultaneously supply numerous high-speed packaging lines, industrial-scale snack food production, dairy processing plants, and ready-meal manufacturing facilities. Its oil-free certification ensures full compliance with FDA 21 CFR 173.310 (food-grade nitrogen specifications) and EU Regulation 231\/2012. The complete absence of oil contamination eliminates any risk of off-flavors, product rancidity, or discoloration that can occur when lubricated compressors are inadvertently deployed in food-contact nitrogen applications.<\/p>\n<\/div>\n

<\/p>\n

\n

Material & Construction<\/h2>\n

Every component of the LW-50\/8 is meticulously selected for nitrogen service compatibility, corrosion resistance, and extended mechanical durability under demanding industrial conditions:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Component<\/th>\nMaterial<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Cylinder Block<\/td>\nGray Cast Iron<\/td>\nGG25 \/ HT250, integral cooling water jackets<\/td>\n<\/tr>\n
Crankshaft<\/td>\nForged Alloy Steel<\/td>\n42CrMo4, Q&T, ISO 1940 G2.5 dynamically balanced<\/td>\n<\/tr>\n
Piston Rings<\/td>\nPTFE-Glass-Bronze Composite<\/td>\nSelf-lubricating, wear rate <0.04 mm\/1000h<\/td>\n<\/tr>\n
Rider Bands<\/td>\nPTFE Composite<\/td>\nPiston guidance, prevent cylinder wall contact<\/td>\n<\/tr>\n
Valve Plates<\/td>\nStainless Steel<\/td>\nSS316, spring-loaded concentric ring design<\/td>\n<\/tr>\n
Connecting Rods<\/td>\nForged Steel with Babbitt Bearings<\/td>\nPrecision-machined, oil-lubricated big end<\/td>\n<\/tr>\n
Intercooler<\/td>\nCarbon Steel Shell \/ SS304 Tubes<\/td>\nASME VIII Div.1, 1.5\u00d7 hydrostatic test<\/td>\n<\/tr>\n
Aftercooler<\/td>\nCarbon Steel Shell \/ SS304 Tubes<\/td>\nFinned tube design, 32\u00b0C cooling water rated<\/td>\n<\/tr>\n
Base Frame<\/td>\nWelded Structural Steel<\/td>\nVibration-damped mounting with anchor templates<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All pressure-bearing components are designed, fabricated, and tested in strict accordance with ASME BPVC Section VIII Division 1<\/strong> or equivalent Chinese GB 150 standards. Every weld joint undergoes comprehensive 100% radiographic inspection (RT) per ASME Section V, Article 2, and each completed pressure vessel is subjected to a rigorous hydrostatic pressure test at 1.5 times the maximum allowable working pressure (MAWP) for a minimum hold duration of 30 minutes before factory release.<\/p>\n

\"LW-50\/8<\/p>\n<\/div>\n

<\/p>\n

\n

Installation & Maintenance Guidelines<\/h2>\n

Foundation & Structural Requirements<\/h3>\n

The LW-50\/8 has a dry weight of 6.50 tonnes with a center of gravity positioned approximately 900 mm above the baseplate. Thanks to the two-row opposed-cylinder design, unbalanced forces are minimized, permitting installation on a reinforced concrete inertia block of 10\u201312 tonnes<\/strong>. The block should be mounted on elastomeric vibration isolation pads (natural frequency 6\u20138 Hz) to prevent vibration transmission to adjacent structures and instrumentation. Minimum clearance requirements: 1.5 m on the non-drive side for valve access and maintenance, 1.2 m on the drive side for motor and coupling inspection, and 2.0 m overhead clearance for crane-assisted major overhauls.<\/p>\n

Cooling Water System Specifications<\/h3>\n

Cooling water flow requirement is approximately 42 m\u00b3\/h<\/strong> at an inlet temperature not exceeding 32\u00b0C. The cooling water distribution network must supply the cylinder jackets, intercooler, and aftercooler in parallel flow circuits. Water quality specifications: pH 6.5\u20138.5, total dissolved solids < 500 mg\/L, chloride content < 50 mg\/L (to prevent SS304 tube corrosion in coolers), and suspended solids < 30 mg\/L. For facilities operating in tropical climates or with marginal water quality, a closed-loop cooling tower equipped with side-stream filtration and automated chemical treatment is strongly recommended to prevent scale formation and microbiological fouling in intercooler tubes.<\/p>\n

Comprehensive Preventive Maintenance Schedule<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Interval<\/th>\nService Item<\/th>\nAction Required<\/th>\n<\/tr>\n<\/thead>\n
Daily<\/td>\nOperational Inspection<\/td>\nCheck vibration levels, abnormal noise, cooling water flow, discharge temperature<\/td>\n<\/tr>\n
250 hours<\/td>\nValve Plate Inspection<\/td>\nRemove and inspect suction\/discharge valve plates for carbon deposits or cracking<\/td>\n<\/tr>\n
1,000 hours<\/td>\nPiston Ring Wear Assessment<\/td>\nMeasure ring groove clearance; replace rings if clearance exceeds 0.25 mm<\/td>\n<\/tr>\n
4,000 hours<\/td>\nIntermediate Overhaul<\/td>\nReplace all piston rings, rider bands, and valve plate assemblies<\/td>\n<\/tr>\n
8,000 hours<\/td>\nMajor Overhaul<\/td>\nInspect crankshaft journals, measure bearing clearances, replace main bearings if >0.08 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

A defining economic advantage of the LW-50\/8 is the complete elimination of lubricating oil<\/strong> from the compression pathway. Unlike oil-lubricated compressors that demand quarterly oil changes, monthly oil analysis, annual separator element replacement, and waste oil disposal, the LW-50\/8 removes these consumables entirely. The sole recurring wear items are the PTFE piston rings and rider bands<\/strong>, which consistently achieve 4,000\u20136,000 hours of reliable service under clean nitrogen operating conditions.<\/p>\n

\"LW-50\/8<\/p>\n<\/div>\n

<\/p>\n

\n

Compliance & Safety Certifications<\/h2>\n

The LW-50\/8 nitrogen compressor is designed, manufactured, and tested to satisfy the following international standards and regulatory frameworks:<\/p>\n

\n
Pressure Equipment Directive<\/strong>
\nASME BPVC Section VIII Div.1, GB 150-2011, PED 2014\/68\/EU Module A<\/span><\/div>\n
Electrical & Machine Safety<\/strong>
\nIEC 60034-1 (IE3 efficiency class), IEC 60204-1, ISO 12100<\/span><\/div>\n
Oil-Free Air Quality<\/strong>
\nISO 8573-1 Class 0 (Oil Content), independently tested by T\u00dcV Rheinland<\/span><\/div>\n
Quality & Environmental Management<\/strong>
\nISO 9001:2015, ISO 14001:2015<\/span><\/div>\n<\/div>\n
\u26a0\ufe0f Critical Safety Advisory<\/strong><\/p>\n

Nitrogen is classified as an odorless, colorless simple asphyxiant gas. All LW-50\/8 installations must incorporate continuous oxygen deficiency monitoring within the compressor room and all adjacent enclosed areas. Ventilation systems must be engineered to maintain ambient oxygen concentrations above 19.5% by volume per OSHA 29 CFR 1910.146 (Permit-Required Confined Spaces). Emergency shutdown interlocks should activate at 19.5% O\u2082 (alarm condition) and trigger automatic compressor isolation at 18.0% O\u2082 (hard shutdown). Personnel entry procedures into enclosed compressor rooms must mandate portable oxygen monitors and strict buddy-system protocols.<\/p>\n<\/div>\n

\"LW-50\/8<\/p>\n<\/div>\n

<\/p>\n

\n

Performance & Efficiency Analysis<\/h2>\n

The LW-50\/8 achieves a specific power consumption of approximately 7.00 kW per m\u00b3\/min<\/strong> of nitrogen delivered at 0.80 MPa discharge pressure. This efficiency metric positions the unit competitively within the high-capacity oil-free piston compressor segment for medium-pressure applications. For comparative context, oil-lubricated screw compressors operating at equivalent pressure ratios typically consume 7.5\u20138.5 kW\/m\u00b3\/min, while legacy single-stage piston designs may exceed 9.0 kW\/m\u00b3\/min at this pressure level.<\/p>\n

Over a standard 8,000-hour annual operating schedule, the LW-50\/8’s efficiency advantage generates approximately 200,000\u2013400,000 kWh of annual energy savings<\/strong> compared to less efficient alternatives. At an average industrial electricity tariff of $0.08\/kWh, this translates to $16,000\u2013$32,000 in direct annual operating cost reduction. When combined with the complete elimination of oil-related consumables (lubricating oil, filter elements, separator cartridges, waste oil disposal), the total cost of ownership for nitrogen compression<\/a> is reduced by an estimated 28\u201338% over a 10-year operational lifecycle.<\/p>\n

The absence of oil in the compression pathway additionally eliminates the energy penalty associated with downstream oil-removal equipment. A typical oil-lubricated compressor of this capacity requires coalescing filters, activated carbon adsorbers, and continuous oil monitoring instrumentation that collectively consume 3\u20135% of the compressor’s rated power output. The LW-50\/8’s oil-free architecture removes this parasitic energy drain entirely.<\/p>\n<\/div>\n

<\/p>\n

\n

Customization & OEM Capabilities<\/h2>\n

We offer extensive customization options to adapt the LW-50\/8 to specific site conditions, integration requirements, and end-user operational specifications:<\/p>\n