Descrição
Compressor de nitrogênio LW-60/8 – Booster de N2 isento de óleo de ultra-alta capacidade para redes industriais exigentes de 0,80 MPa
Engineered to deliver 60 m³/min at 0.80 MPa discharge pressure, the LW-60/8 is a two-stage, two-row oil-free piston nitrogen compressor purpose-built for mega-scale cryogenic air separation, high-pressure VPSA booster stations, and intensive petrochemical pipeline distribution. Zero lubricant contamination, continuous-duty rated, and optimized for relentless 24/7 industrial operation at elevated pressure.
Visão geral do produto
O LW-60/8 nitrogen compressor represents the pinnacle of our oil-free piston compressor portfolio, engineered to satisfy the most demanding nitrogen boosting requirements in large-scale industrial gas infrastructure. With an exceptional 60 m³/min capacity combinado com um robusto pressão de descarga de 0,80 MPa, this unit stands as the workhorse of mega-scale cryogenic air separation plants, high-pressure VPSA booster stations, and intensive petrochemical distribution networks where both flow and pressure are non-negotiable.
What distinguishes the LW-60/8 from conventional lubricated alternatives is its intrinsically oil-free compression pathway. The piston rings and rider bands are fabricated from proprietary self-lubricating PTFE composite materials that operate entirely without hydrocarbon lubricants. This design philosophy ensures the nitrogen product stream remains absolutely free of oil contamination, achieving Certificação ISO 8573-1 Classe 0 without any downstream purification equipment. For operators in food processing, pharmaceutical manufacturing, semiconductor fabrication, and petrochemical processing, this native oil-free characteristic eliminates the capital expenditure, maintenance burden, and energy penalty of oil-filtration systems.
The compressor architecture follows a dois estágios, duas linhas (二列二级) configuration that optimally distributes the substantial pressure ratio across two compression cylinders. This staged approach is essential for managing the thermal loads associated with 0.80 MPa discharge pressure while preserving the dimensional integrity of the PTFE sealing elements. Each stage incorporates an independent high-efficiency intercooler, ensuring gas temperatures remain within safe operating envelopes even during sustained maximum-capacity operation. The massive cast-iron frame and dynamically balanced forged steel crankshaft are rated for a minimum service life of 120.000 horas De acordo com os protocolos de manutenção padrão.
Technical Specifications – LW-60/8
| Parâmetro | Valor | Unidade |
|---|---|---|
| Modelo | LW-60/8 | – |
| Padrão | Dois estágios, duas filas (二列二级) | – |
| Capacidade | 60 | m³/min |
| Pressão de descarga | 0.80 | MPa |
| Dimensões do compressor (C × L × A) | 2380 × 1500 × 2560 | mm |
| Peso | 6.50 | t |
| Poder | 350 | kW |
| Tensão | 6 mil ou 10 mil | V |
| Meio gasoso | Nitrogênio (N₂) | – |
| Lubrificação | Sem óleo | – |
* Todas as especificações são classificadas em condições de referência padrão (ISO 1217, Anexo C). O desempenho real pode variar dependendo da altitude do local, da temperatura ambiente e das condições de entrada.
Principais características e vantagens de engenharia
1. High-Temperature PTFE Composite Sealing Technology
The LW-60/8 employs an advanced conjunto de anel de pistão autolubrificante e cinta de guia manufactured from proprietary PTFE composites reinforced with glass fiber, carbon graphite, and bronze particulates. This material formulation achieves a coefficient of friction below 0.06 without any external hydrocarbon lubrication, completely eliminating oil vapor carryover into the nitrogen product stream. The rings are specifically engineered for the elevated discharge temperatures associated with 0.80 MPa operation, maintaining dimensional stability and sealing effectiveness up to 185°C. For industrial gas operators, this delivers Conformidade nativa com a norma ISO 8573-1 Classe 0 without the capital cost, maintenance complexity, or energy penalty of downstream oil-filtration equipment.
2. Advanced Two-Stage Thermodynamic Optimization
O arquitetura de compressão de dois estágios of the LW-60/8 is thermodynamically optimized for the demanding 0.80 MPa discharge pressure target. By dividing the substantial overall pressure ratio between a low-pressure cylinder and a high-pressure cylinder, the compressor achieves a significantly lower mean effective temperature per stage compared to single-stage designs. A dedicated high-efficiency shell-and-tube intercooler between stages removes the heat of compression, maintaining discharge temperatures below 160°C even at maximum continuous load. This thermal management is critical for preserving PTFE ring integrity and extending valve plate service life by approximately 45% versus single-stage alternatives operating at equivalent pressure ratios.
3. Estrutura maciça de ferro fundido com equilíbrio de força superior
A estrutura principal é fundida a partir de GG25 ferro fundido cinzento (equivalent to ASTM A48 Class 30B) with integral cooling water passages machined directly into the casting. The arranjo de cilindros opostos em duas fileiras provides natural first-order force cancellation, reducing the unbalanced inertia forces transmitted to the foundation by over 85% compared to single-row designs of equivalent capacity. This mechanical advantage permits installation on a reinforced concrete inertia block of minimum 12 tonnes (versus 18+ tonnes for single-row equivalents), significantly reducing civil engineering costs and simplifying retrofit installations in existing compressor houses where foundation capacity may be constrained.
4. Medium-Voltage Motor Drive for Large-Scale Integration
The LW-60/8 is driven by a 350 kW medium-voltage induction motor available in either 6kV or 10kV configurations, conforming to IEC 60034-1 efficiency class IE3. The medium-voltage drive eliminates the need for oversized low-voltage switchgear and impractically heavy-gauge cabling that would be required for a 380V motor of this power rating. Direct integration into industrial medium-voltage distribution networks reduces electrical infrastructure costs, minimizes I²R losses in power cabling, and improves overall energy efficiency. For facilities with 6kV or 10kV bus systems standard in large industrial plants, the LW-60/8 offers seamless electrical compatibility.
Cenários de aplicação
Instalações de separação de ar criogênica em megaescala
In mega-scale cryogenic ASU facilities producing 3,000–8,000 Nm³/h of gaseous nitrogen, the LW-60/8 serves as the reforçador de nitrogênio primário de alta capacidade between the cold box and the distribution header. Its 60 m³/min capacity matches the output of the largest single-train ASUs, while the 0.80 MPa discharge pressure provides ample head for long-distance pipeline distribution to downstream consumers such as integrated steel complexes, petrochemical crackers, and LNG liquefaction trains. The oil-free design is absolutely critical in these applications because any oil contamination would compromise the purity of nitrogen supplied to the most sensitive processes, including semiconductor wafer fabrication and pharmaceutical aseptic filling lines served by the same distribution network.
High-Pressure VPSA Nitrogen Booster Stations
Para grandes geradores de nitrogênio VPSA que produzem nitrogênio com pureza de 99,5–99,9% a pressão próxima da atmosférica, o LW-60/8 nitrogen booster compresses the low-pressure product to 0.80 MPa for high-pressure distribution. The elevated discharge pressure is particularly valuable for VPSA installations serving extensive industrial parks or multiple facilities through a centralized high-pressure header, where pressure losses across the distribution network can be substantial. The oil-free compression path is non-negotiable in VPSA service because hydrocarbon contamination would irreversibly poison the carbon molecular sieve adsorbent, permanently degrading separation efficiency and necessitating costly complete adsorbent replacement.
Intensive Petrochemical High-Pressure Nitrogen Systems
In large petrochemical complexes and refinery operations, the LW-60/8 provides high-pressure nitrogen for reactor inerting, catalyst preservation, pipeline purging, emergency vessel injection, and hydrotest filling. The 0.80 MPa discharge pressure is sufficient to overcome the pressure ratings of the largest process vessels and reactor systems, allowing direct nitrogen injection without intermediate boosting stages. The continuous-duty rating ensures uninterrupted nitrogen availability during extended turnaround campaigns that may span several weeks. The oil-free certification is mandatory for petrochemical applications where nitrogen contacts catalyst beds or enters process streams that must remain completely hydrocarbon-free.
Integrated Steel Mill High-Pressure Inerting
Large integrated steel mills with multiple blast furnaces, basic oxygen furnaces, and continuous casting lines require enormous volumes of nitrogen for blast furnace gas sealing, tundish inerting, ladle metallurgy, and coke oven gas purging. The LW-60/8’s 60 m³/min capacity can serve multiple blast furnaces or an entire casting complex simultaneously through a centralized high-pressure nitrogen header. The 0.80 MPa discharge pressure provides adequate head to overcome the back-pressure of the largest blast furnace gas systems and maintain positive sealing gas flow at all tuyere levels. The oil-free design prevents oil contamination of blast furnace gas, which would foul downstream gas cleaning equipment and compromise the quality of recovered blast furnace gas used for power generation and heating.
Materiais e construção
The LW-60/8 is constructed from premium materials selected for nitrogen compatibility, high-pressure service, and extended operational life under demanding conditions:
| Componente | Material | Especificação |
|---|---|---|
| Bloco de cilindros | Ferro fundido cinzento | GG25 / HT250, camisas de refrigeração a água integradas |
| Cambota | Aço liga forjado | 42CrMo4, Q&T, ISO 1940 G2.5 balanceado dinamicamente |
| Anéis de Pistão | Compósito de PTFE-Vidro-Carbono-Bronze | Self-lubricating, high-temp rated to 185°C |
| Pulseiras de motociclista | Compósito de PTFE | Piston guidance, anti-scuffing, wear rate <0.035 mm/1000h |
| Placas de válvulas | Aço inoxidável | SS316, design com mola de anel concêntrico |
| Bielas | Aço forjado com mancais de metal antifricção | Encosto de biela usinado com precisão e lubrificado a óleo |
| Intercooler | Carcaça em aço carbono / Tubos em aço inoxidável 316 | ASME VIII Div.1, teste hidrostático 1,5×, retenção de 30 min |
| Resfriador posterior | Carcaça em aço carbono / Tubos em aço inoxidável 316 | High-efficiency finned tube, 32°C cooling water |
| Estrutura de base | Aço estrutural | Fabricação soldada, bases de montagem com amortecimento de vibração. |
Todos os componentes que suportam pressão são projetados e fabricados em estrita conformidade com ASME BPVC Seção VIII Divisão 1 ou de acordo com as normas chinesas GB 150. Cada junta soldada passa por inspeção radiográfica (RT) 100%, conforme a Seção V, Artigo 2 da ASME, e cada vaso de pressão finalizado é submetido a um teste de pressão hidrostática a 1,5 vezes a pressão máxima de trabalho admissível (PMTA) por um período mínimo de 30 minutos.
Diretrizes de Instalação e Manutenção
Requisitos de fundação e estrutura
The LW-60/8 has a dry weight of 6.50 tonnes and a center of gravity approximately 950 mm above the baseplate. Thanks to the two-row opposed-cylinder design, unbalanced forces are minimal, permitting installation on a reinforced concrete inertia block of 12–14 tonnes. The block should be mounted on elastomeric vibration isolators (natural frequency 6–8 Hz) to prevent vibration transmission to adjacent structures and sensitive instrumentation. Minimum clearance requirements: 1.5 m on the non-drive side for valve access, 1.2 m on the drive side for motor maintenance, and 2.0 m overhead for crane access during major overhauls.
Projeto de Sistema de Água de Refrigeração
A demanda de água para resfriamento é de aproximadamente 60 m³/h at an inlet temperature not exceeding 32°C. The water distribution circuit supplies the cylinder jackets, intercooler, and aftercooler in parallel branches. Water quality specifications: pH 6.5–8.5, total dissolved solids < 500 mg/L, chloride content < 50 mg/L (to prevent SS316 tube corrosion in the coolers), suspended solids < 30 mg/L, and total hardness < 300 mg/L as CaCO₃. For sites with marginal water quality, a closed-loop cooling tower with side-stream filtration and chemical treatment is strongly recommended to prevent scale formation and corrosion.
Cronograma de Manutenção Preventiva
| Intervalo | Item de serviço | Ação necessária |
|---|---|---|
| Diário | Inspeção Operacional | Check vibration levels, abnormal noise, cooling water flow, discharge temperature |
| 250 horas | Inspeção da placa da válvula | Remova e inspecione as válvulas de sucção/descarga quanto a depósitos de carbono, fadiga da mola ou rachaduras. |
| 1.000 horas | Avaliação do desgaste dos anéis do pistão | Measure ring groove clearance; replace rings if clearance exceeds 0.22 mm |
| 4.000 horas | Revisão Intermediária | Substitua todos os anéis de pistão, anéis de guia e conjuntos de placas de válvulas. |
| 8.000 horas | Revisão geral | Inspecione os munhões do virabrequim, meça a folga dos mancais principais e substitua os mancais se a folga for superior a 0,08 mm. |
The oil-free design of the LW-60/8 dramatically reduces maintenance complexity compared to lubricated alternatives. There are no oil changes to schedule, no lubricating oil samples to analyze, no oil filter elements to replace, and no oil separator cartridges to monitor. The primary consumable wear items are the Anéis de pistão e anéis de guia de PTFE, which typically achieve 4,000–6,000 hours of service life under clean nitrogen conditions. This maintenance simplification translates to lower labor costs, reduced spare parts inventory, and higher equipment availability.
Certificações de Conformidade e Segurança
The LW-60/8 nitrogen compressor is designed, manufactured, and tested to meet or exceed the following international standards and regulatory frameworks:
ASME BPVC Seção VIII Div.1, GB 150-2011, PED 2014/68/EU Módulo A
IEC 60034-1 (eficiência IE3), IEC 60204-1, ISO 12100 segurança de máquinas
ISO 8573-1 Classe 0 (Teor de Óleo), testado independentemente pela TÜV Rheinland.
ISO 9001:2015 (Gestão da Qualidade), ISO 14001:2015 (Gestão Ambiental)
Nitrogen is classified as a simple asphyxiant gas. All LW-60/8 installations must incorporate continuous oxygen deficiency monitoring in the compressor room and all adjacent areas where nitrogen leakage could accumulate. Ventilation systems must be engineered 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% O₂ (alarm) and trigger automatic compressor isolation at 18.0% O₂ (hard shutdown). Personnel entry procedures into enclosed compressor rooms must include portable oxygen monitors and a buddy-system protocol.
Análise de desempenho e eficiência
The LW-60/8 achieves a specific power consumption of approximately 5.83 kW per m³/min of nitrogen delivered at 0.80 MPa discharge pressure. This efficiency metric is competitive for an ultra-high-capacity oil-free piston compressor operating at an elevated pressure ratio, positioning the unit favorably within the 50–70 m³/min capacity class. For comparison, oil-lubricated screw compressors in similar high-pressure applications typically consume 6.2–7.0 kW/m³/min, while legacy single-stage piston designs may exceed 8.0 kW/m³/min at equivalent discharge pressures.
Over a standard 8,000-hour annual operating schedule, the LW-60/8’s efficiency advantage generates approximately 180,000–420,000 kWh of annual energy savings compared to less efficient alternatives. At an average industrial electricity tariff of $0.08/kWh, this represents $14,400–$33,600 in direct operating cost reduction per year. When combined with the complete elimination of oil-related consumables (lubricating oil, filter elements, separator cartridges, waste oil disposal, and oil analysis), the custo total de propriedade para compressão de nitrogênio é reduzida em cerca de 22–32% ao longo de uma vida útil operacional de 10 anos.
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 and pressure rating requires coalescing filters, activated carbon adsorbers, and continuous oil monitoring instrumentation that collectively consume 3–5% of the compressor’s power output. The LW-60/8’s oil-free design removes this parasitic load entirely, further improving effective system efficiency.
Personalização e capacidades OEM
We offer extensive customization options to adapt the LW-60/8 to specific site conditions, integration requirements, and end-user specifications:
- Pacotes completos montados em skid: The compressor, motor, intercooler, aftercooler, instrumentation, and control panel are pre-assembled on a structural steel skid with integrated lifting lugs and anchor bolt templates. This approach reduces field installation time by approximately 60% and minimizes commissioning risks through comprehensive factory pre-testing of all systems.
- Configurações de áreas perigosas: Estão disponíveis invólucros para motores e componentes elétricos em conformidade com as normas ATEX Zona 2 e IECEx para instalações em unidades petroquímicas onde atmosferas explosivas podem estar ocasionalmente presentes. Detecção de gás integrada e intertravamentos automáticos de ventilação podem ser incorporados ao sistema de controle.
- Controle Avançado de Processos: Optional Siemens S7-1200 or Allen-Bradley CompactLogix PLC with 10-inch HMI touchscreen, remote monitoring via Modbus TCP/IP or OPC-UA, and seamless integration with plant DCS/SCADA systems. Automatic load/unload control and variable frequency drive (VFD) compatibility optimize part-load efficiency and reduce mechanical wear during startup.
- Sistemas de proteção ambiental: C5-M marine-grade coating systems for coastal or offshore installations; tropicalized electrical components for ambient temperatures up to 55°C; and IP54-rated acoustic enclosures that reduce noise emission from 85 dB(A) to 72 dB(A) at 1 meter, suitable for indoor installations without dedicated compressor houses.
- Programas OEM e de marca própria: Cores de tinta personalizadas, placas de identificação com a marca e pacotes de documentação localizados estão disponíveis para distribuidores de equipamentos a gás e integradores de sistemas. Manuais técnicos, listas de peças de reposição e procedimentos de manutenção podem ser fornecidos em vários idiomas.
Configurações personalizadas estão disponíveis em Quantidade mínima de encomenda: 1 unidadeA análise técnica e a elaboração da proposta geralmente levam de 5 a 7 dias úteis. O prazo de entrega padrão é de 12 a 14 semanas; pedidos repetidos são entregues em 8 a 10 semanas após a confirmação do pedido.
Case Study: Petrochemical Complex Nitrogen Distribution Overhaul
Cliente: A major petrochemical complex in the Middle East with three ethylene crackers, two polyethylene plants, and a polypropylene unit
Desafio: The complex’s nitrogen supply was provided by three aging oil-lubricated compressors (two European brands, one Asian brand, 16–22 years in service) feeding a common 0.60 MPa distribution header. The compressors were experiencing progressive oil carryover into the nitrogen stream, contaminating catalyst beds in the ethylene crackers and causing polymerization issues in the polyethylene reactors. Maintenance costs had escalated to $120,000/year, and the 0.60 MPa pressure was insufficient for new high-pressure reactor inerting requirements. The complex required a minimum 55 m³/min at 0.80 MPa to meet expanded production targets.
Solução: Nós fornecemos um LW-60/8 oil-free nitrogen compressor as the new primary compressor, configured on a custom skid with integrated intercooler, aftercooler, and a Siemens S7-1200 PLC control panel with full SCADA integration. The 0.80 MPa discharge pressure met all new high-pressure inerting requirements, while the oil-free design eliminated contamination of catalyst beds and polymerization reactors. A 10 m³ surge vessel was installed upstream to buffer demand fluctuations from the multiple process units. The two existing compressors were retained as backup units.
Resultados quantificados após 24 meses:
- Teor de nitrogênio no óleo: Reduzido de 5,8 mg/m³ para <0,01 mg/m³, obtendo a certificação ISO 8573-1 Classe 0
- Catalyst bed replacement frequency: Extended from 18 months to 48 months, saving $180,000/year in catalyst costs
- Polymerization reactor contamination events: Eliminado completamente, improving on-spec production by 2.1%
- Custo anual de manutenção: Reduzido em 48% ($120,000 to $62,400) through elimination of oil-related repairs
- Consumo de energia: Melhorado pela versão 8.2% versus the primary replaced unit, saving approximately $24,800/year
- Tempo de inatividade não planejado: Eventos zero in 24 months of continuous operation
“The LW-60/8 has completely transformed our nitrogen reliability. The elimination of oil contamination has extended our catalyst life by 2.5× and eliminated reactor contamination events. Our maintenance team has been redeployed to proactive tasks instead of constant oil-related repairs. The payback period was under 16 months.” — Diretor de Operações, Complexo Petroquímico
Perguntas frequentes e guia de seleção
Produtos e soluções relacionados
LW-52/8 High-Capacity Nitrogen Compressor
A slightly lower-capacity sibling delivering 52 m³/min at 0.80 MPa, ideal for applications where the full 60 m³/min of the LW-60/8 is not required. Offers identical oil-free technology and engineering standards.
Compressores de nitrogênio de alta pressão da série DW
Designed for discharge pressures from 0.40 MPa to 2.00 MPa, the DW series covers nitrogen injection, high-pressure pipeline boosting, and chemical synthesis applications. Capacities from 2 to 130 m³/min.
Compressores isentos de óleo de múltiplos estágios da série ZW
Compressores verticais de múltiplos estágios, isentos de óleo, para oxigênio, nitrogênio, hidrogênio e gases especiais. Pressões de descarga de até 9,00 MPa para enchimento de gases de alta pressão, carregamento de cilindros e aplicações em processos químicos.
Para uma visão geral completa dos nossos produtos/serviços, entre em contato conosco. compressor de nitrogênio industrial Para obter informações sobre nosso portfólio, que inclui compressores de oxigênio isentos de óleo, compressores de hidrogênio, compressores de dióxido de carbono e soluções personalizadas para gases especiais, entre em contato com nossa equipe de engenharia de aplicações ou consulte nosso catálogo de produtos online.
Ready to Transform Your Ultra-High-Capacity Nitrogen System?
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