{"id":552,"date":"2026-07-20T05:26:22","date_gmt":"2026-07-20T05:26:22","guid":{"rendered":"https:\/\/n2-compressor.com\/?post_type=product&p=552"},"modified":"2026-07-20T05:26:22","modified_gmt":"2026-07-20T05:26:22","slug":"lw-30-8-nitrogen-compressor","status":"publish","type":"product","link":"https:\/\/n2-compressor.com\/kk\/product\/lw-30-8-nitrogen-compressor\/","title":{"rendered":"LW-30\/8 Nitrogen Compressor \u2013 High-Flow Oil-Free N2 Booster for Medium-Pressure Pipeline Distribution"},"content":{"rendered":"
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LW-30\/8 Nitrogen Compressor \u2013 High-Flow Oil-Free N2 Booster for Medium-Pressure Pipeline Distribution<\/h1>\n

Delivering 30 m\u00b3\/min at 0.80 MPa discharge pressure, the LW-30\/8 is a two-stage, two-row oil-free piston nitrogen compressor engineered for medium-scale cryogenic air separation, VPSA nitrogen booster stations, and industrial pipeline networks requiring elevated pressure head. Zero lubricant contamination, continuous-duty rated, and built for 24\/7 operational reliability.<\/p>\n

\u0411\u0430\u0493\u0430 \u0441\u04b1\u0440\u0430\u0443<\/a>
\nView N2 Compressor Series<\/a><\/div>\n

\"LW-30\/8<\/p>\n<\/div>\n

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\u04e8\u043d\u0456\u043c\u0433\u0435 \u0448\u043e\u043b\u0443<\/h2>\n

The LW-30\/8 nitrogen compressor<\/strong> occupies a strategically important position in our oil-free piston compressor lineup, bridging medium-flow nitrogen generation with elevated-pressure distribution requirements. With a rated capacity of 30 m\u00b3\/min<\/strong> and a discharge pressure of 0.80 MPa<\/strong>, this unit serves as the backbone of medium-scale cryogenic air separation plants, industrial VPSA booster installations, and nitrogen pipeline networks where higher pressure head is required to overcome distribution friction losses.<\/p>\n

What sets the LW-30\/8 apart from conventional lubricated compressors is its fully oil-free compression pathway<\/strong>. The piston rings and rider bands are precision-manufactured from self-lubricating PTFE composite materials that operate without hydrocarbon lubricants, ensuring the nitrogen stream remains entirely free of oil contamination. This intrinsic oil-free characteristic is indispensable for applications mandating ISO 8573-1 Class 0 certification, including food packaging nitrogen, pharmaceutical reactor inerting, electronics-grade process gas, and chemical synthesis feedstock.<\/p>\n

The compressor architecture adheres to a two-stage, two-row (\u4e8c\u5217\u4e8c\u7ea7)<\/strong> configuration that partitions the total pressure ratio across two compression cylinders. This staged approach reduces the discharge temperature per stage, enhances volumetric efficiency, and prolongs the operational life of valves and sealing elements. Each compression stage is equipped with an independent intercooler, maintaining gas temperatures within thermally safe operating envelopes even during sustained maximum-load operation. The robust cast-iron frame and dynamically balanced forged steel crankshaft are rated for a minimum service life of 120,000 hours<\/strong> under standard preventive maintenance protocols.<\/p>\n

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

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Technical Specifications \u2013 LW-30\/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>\nLW-30\/8<\/td>\n\u2013<\/td>\n<\/tr>\n
\u04e8\u0440\u043d\u0435\u043a<\/td>\nTwo-stage, Two-row (\u4e8c\u5217\u4e8c\u7ea7)<\/td>\n\u2013<\/td>\n<\/tr>\n
\u0421\u044b\u0439\u044b\u043c\u0434\u044b\u043b\u044b\u0493\u044b<\/td>\n30<\/td>\n\u043c\u00b3\/\u043c\u0438\u043d<\/td>\n<\/tr>\n
\u0428\u044b\u0493\u0430\u0440\u0443 \u049b\u044b\u0441\u044b\u043c\u044b<\/td>\n0.80<\/td>\n\u041c\u041f\u0430<\/td>\n<\/tr>\n
Compressor Size (L \u00d7 W \u00d7 H)<\/td>\n2890 \u00d7 1600 \u00d7 2173<\/td>\nmm<\/td>\n<\/tr>\n
\u0421\u0430\u043b\u043c\u0430\u049b<\/td>\n4.12<\/td>\nt<\/td>\n<\/tr>\n
\u049a\u0443\u0430\u0442<\/td>\n200<\/td>\n\u043a\u0412\u0442<\/td>\n<\/tr>\n
\u0412\u043e\u043b\u044c\u0442\u0430\u0436<\/td>\n380 \/ 6k or 10k<\/td>\nV<\/td>\n<\/tr>\n
\u0413\u0430\u0437 \u043e\u0440\u0442\u0430\u0441\u044b<\/td>\nNitrogen (N\u2082)<\/td>\n\u2013<\/td>\n<\/tr>\n
Lubrication<\/td>\nOil-free<\/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 PTFE Composite Sealing System<\/h3>\n

The LW-30\/8 employs a proprietary self-lubricating piston ring and rider band assembly<\/strong> manufactured from high-density PTFE composites reinforced with glass fiber and bronze particulates. This material formulation achieves a dynamic coefficient of friction below 0.08 without any external hydrocarbon lubrication, completely eliminating the risk of oil vapor carryover into the nitrogen product stream. For operators in regulated industries, this translates directly to ISO 8573-1 Class 0 compliance<\/strong> without the capital investment, operating costs, and maintenance burden of downstream oil-filtration trains.<\/p>\n

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

The two-stage compression architecture<\/strong> of the LW-30\/8 is thermodynamically optimized for the 0.80 MPa discharge pressure target. By distributing the pressure ratio between a low-pressure cylinder and a high-pressure cylinder, the compressor achieves a lower mean effective temperature per stage. A dedicated shell-and-tube intercooler between stages removes the heat of compression, maintaining discharge temperatures below 155\u00b0C even at maximum continuous load. This thermal management strategy extends valve plate service life by approximately 35% compared to single-stage compressors operating at equivalent overall pressure ratios, and it prevents thermal degradation of the PTFE sealing elements that could otherwise occur at elevated temperatures.<\/p>\n

3. Heavy-Duty Cast-Iron Frame with Inherent Force Balance<\/h3>\n

The main compressor block is cast from GG25 gray cast iron<\/strong> (equivalent to ASTM A48 Class 30B) with integral cooling water passages machined into the cylinder barrels. The two-row opposed-cylinder arrangement provides natural first-order force cancellation, reducing the unbalanced inertia forces transmitted to the foundation by over 80% compared to single-row designs of equivalent capacity. This mechanical advantage permits the LW-30\/8 to operate on a relatively modest foundation block (minimum 7 tonnes versus 12+ tonnes for single-row equivalents), reducing civil engineering costs and simplifying retrofit installations within existing compressor houses or machinery rooms.<\/p>\n

4. Flexible Voltage Configuration for Industrial Integration<\/h3>\n

The 200 kW drive motor is available in 380V, 6kV, or 10kV<\/strong> configurations, allowing seamless integration into diverse industrial electrical distribution architectures. The standard 380V option is ideal for facilities with existing low-voltage infrastructure, while the 6kV and 10kV variants eliminate the need for step-down transformers in large-scale air separation plants where medium-voltage bus systems are standard. This voltage flexibility reduces electrical infrastructure costs, improves overall energy efficiency by minimizing transformer losses, and simplifies the commissioning process.<\/p>\n

\"LW-30\/8<\/p>\n<\/div>\n

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Application Scenarios<\/h2>\n

Medium-Scale Cryogenic Air Separation Plants<\/h3>\n

In cryogenic ASU facilities producing 600\u20131,500 Nm\u00b3\/h of gaseous nitrogen, the LW-30\/8 serves as the primary nitrogen booster<\/strong> between the cold box and the medium-pressure distribution header. Its 30 m\u00b3\/min capacity aligns precisely with the output of medium-scale ASUs, while the 0.80 MPa discharge pressure provides sufficient head for pipeline distribution over distances up to 3 km to downstream consumers such as steel mill inerting stations, chemical reactor blanketing systems, and LNG plant purge gas networks. The oil-free design is particularly critical in ASU service because any hydrocarbon contamination would degrade the cryogenic separation efficiency and potentially damage downstream molecular sieve dryers.<\/p>\n

\"LW-30\/8<\/p>\n

VPSA Nitrogen Booster Stations<\/h3>\n

Vacuum Pressure Swing Adsorption (VPSA) nitrogen generators produce gaseous nitrogen at near-atmospheric pressure (0.05\u20130.10 MPa). The LW-30\/8 nitrogen booster<\/a> compresses this low-pressure product to 0.80 MPa for distribution to point-of-use applications. The oil-free compression path is absolutely essential in VPSA service because any hydrocarbon contamination would poison the carbon molecular sieve adsorbent, permanently degrading the nitrogen generator’s separation efficiency and necessitating costly adsorbent replacement. The 0.80 MPa discharge pressure is particularly advantageous for VPSA installations serving multiple consumers through a branched distribution network where pressure losses are significant.<\/p>\n

Petrochemical & Refinery Pipeline Nitrogen Injection<\/h3>\n

Refinery tank farms, petrochemical storage facilities, and process plants require large volumes of nitrogen for tank blanketing, inerting, and pipeline purging<\/strong> to prevent explosive vapor formation and maintain product quality. The LW-30\/8’s 0.80 MPa discharge pressure provides ample head to overcome pipeline friction losses over distances up to 3 km, making it suitable for centralized nitrogen supply to multiple storage tanks, process vessels, and flare systems through a single distribution header. The continuous-duty rating ensures uninterrupted nitrogen availability during extended turnaround maintenance campaigns that may span several weeks.<\/p>\n

\"LW-30\/8<\/p>\n

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

Large-scale food packaging facilities and processing plants require high-flow nitrogen for modified atmosphere packaging (MAP)<\/strong>, controlled atmosphere storage, and inert gas flushing of processing equipment. The LW-30\/8’s 30 m\u00b3\/min capacity can simultaneously supply multiple high-speed packaging lines, industrial ovens, and storage silos, while its oil-free certification ensures compliance with FDA 21 CFR 173.310 (food-grade nitrogen) and EU Regulation 231\/2012. The absence of oil contamination eliminates the risk of off-flavors, rancidity, or product discoloration that can occur when lubricated compressors are used in food-contact applications, protecting brand reputation and avoiding costly product recalls.<\/p>\n<\/div>\n

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Material & Construction<\/h2>\n

Every component of the LW-30\/8 is selected for nitrogen compatibility, corrosion resistance, and long-term mechanical integrity under continuous-duty operation:<\/p>\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 water jackets<\/td>\n<\/tr>\n
Crankshaft<\/td>\nForged Alloy Steel<\/td>\n42CrMo4, Q&T, ISO 1940 G2.5 balanced<\/td>\n<\/tr>\n
Piston Rings<\/td>\nPTFE-Glass-Bronze Composite<\/td>\nSelf-lubricating, wear rate <0.05 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, concentric ring spring-loaded 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 inlet<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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

\"LW-30\/8<\/p>\n<\/div>\n

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Installation & Maintenance Guidelines<\/h2>\n

Foundation Requirements<\/h3>\n

The LW-30\/8 has a dry weight of 4.12 tonnes and a center of gravity approximately 820 mm above the baseplate. Thanks to the two-row opposed-cylinder design, the unbalanced forces are minimal, allowing installation on a reinforced concrete inertia block of 7\u20139 tonnes<\/strong>. The block should be mounted on elastomeric vibration isolators (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 service, and 2.0 m overhead for crane access during major overhauls.<\/p>\n

Cooling Water System<\/h3>\n

The LW-30\/8 requires approximately 28 m\u00b3\/h of cooling water<\/strong> at an inlet temperature not exceeding 32\u00b0C. The cooling water distribution circuit supplies the cylinder jackets, intercooler, and aftercooler in parallel. 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 the coolers), suspended solids < 30 mg\/L, and total hardness < 300 mg\/L as CaCO\u2083. For sites with marginal water quality or high ambient temperatures, a closed-loop cooling tower with side-stream filtration and chemical treatment is strongly recommended to prevent scale formation and corrosion.<\/p>\n

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

The oil-free design of the LW-30\/8 dramatically reduces maintenance complexity compared to lubricated alternatives. There are no oil changes to schedule, no oil samples to send for laboratory analysis, no filter elements to stock and replace, and no oil separator cartridges to monitor. The only recurring wear items are the PTFE piston rings and rider bands<\/strong>, which typically achieve 4,000\u20136,000 hours of service life under clean nitrogen conditions. This maintenance simplification translates directly to reduced labor costs, lower spare parts inventory, and higher equipment availability.<\/p>\n

\"LW-30\/8<\/p>\n<\/div>\n

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Compliance & Safety Certifications<\/h2>\n

The LW-30\/8 nitrogen compressor is designed, manufactured, and tested to meet or exceed the following international standards and regulatory frameworks:<\/p>\n

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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), IEC 60204-1, ISO 12100 (machinery safety)<\/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<\/strong>
\nISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management)<\/span><\/div>\n<\/div>\n
\u26a0\ufe0f Critical Safety Advisory<\/strong><\/p>\n

Nitrogen is classified as a simple asphyxiant gas. All LW-30\/8 installations must incorporate continuous oxygen deficiency monitoring in the compressor room and all adjacent areas where nitrogen leakage could accumulate. Ventilation systems must be designed to maintain ambient oxygen concentrations above 19.5% volume per OSHA 29 CFR 1910.146 (Permit-Required Confined Spaces). Emergency shutdown interlocks should activate at 19.5% O\u2082 (alarm) and trigger automatic compressor isolation at 18.0% O\u2082 (hard shutdown). Personnel entry procedures into enclosed compressor rooms must include portable oxygen monitors and a buddy-system protocol.<\/p>\n<\/div>\n

\"LW-30\/8<\/p>\n<\/div>\n

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Performance & Efficiency Analysis<\/h2>\n

The LW-30\/8 achieves a specific power consumption of approximately 6.67 kW per m\u00b3\/min<\/strong> of nitrogen delivered at 0.80 MPa discharge pressure. This efficiency metric positions the unit competitively within the 20\u201340 m\u00b3\/min oil-free piston compressor segment, particularly considering the elevated discharge pressure relative to lower-pressure models. For comparison, oil-lubricated screw compressors in similar applications typically consume 7.0\u20137.8 kW\/m\u00b3\/min, while legacy single-stage piston designs may exceed 8.5 kW\/m\u00b3\/min at equivalent pressure ratios.<\/p>\n

Over a standard 8,000-hour annual operating schedule, the LW-30\/8’s efficiency advantage yields approximately 80,000\u2013200,000 kWh of annual energy savings<\/strong> compared to less efficient alternatives. At an average industrial electricity tariff of $0.08\/kWh, this represents $6,400\u2013$16,000 in direct operating cost reduction per year. When combined with the 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 20\u201330% over a 10-year operational life.<\/p>\n

The absence of oil in the compression path also eliminates the energy penalty associated with downstream oil-removal equipment. A typical oil-lubricated compressor of this size requires coalescing filters, activated carbon adsorbers, and monitoring instrumentation that collectively consume 3\u20135% of the compressor’s power output. The LW-30\/8’s oil-free design removes this parasitic load entirely, further improving the net system efficiency.<\/p>\n<\/div>\n

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Customization & OEM Capabilities<\/h2>\n

We offer comprehensive customization options to adapt the LW-30\/8 to specific site conditions, integration requirements, and end-user specifications:<\/p>\n