Descrição
LW-52/8 Nitrogen Compressor – High-Capacity Oil-Free N2 Booster for 0.80 MPa Industrial Distribution
Delivering 52 m³/min at 0.80 MPa discharge pressure, the LW-52/8 is a two-stage, two-row oil-free piston nitrogen compressor engineered for large-scale cryogenic air separation, high-pressure VPSA nitrogen boosting, and demanding petrochemical pipeline distribution networks. Zero lubricant contamination, continuous-duty rated, and built for 24/7 industrial reliability at elevated pressure.
Visão geral do produto
O LW-52/8 nitrogen compressor stands as a high-performance flagship within our oil-free piston compressor lineup, engineered specifically for applications demanding both substantial flow capacity and elevated discharge pressure. With an impressive 52 m³/min capacity coupled with a pressão de descarga de 0,80 MPa, this unit addresses the most demanding nitrogen boosting requirements in large-scale industrial gas infrastructure.
What sets the LW-52/8 apart from conventional alternatives is its caminho de compressão totalmente isento de óleo. The piston rings and rider bands are precision-machined from advanced self-lubricating PTFE composite materials that operate without any hydrocarbon lubricants. This intrinsic oil-free characteristic ensures the nitrogen product stream remains completely uncontaminated, achieving Certificação ISO 8573-1 Classe 0 natively. For operators in food processing, pharmaceutical manufacturing, and electronics fabrication, this eliminates the capital expenditure and ongoing maintenance burden of downstream oil-removal filtration systems.
A arquitetura do compressor emprega um dois estágios, duas linhas (二列二级) configuration that optimally distributes the 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 integrity of the PTFE sealing elements. Each stage features an independent intercooler, ensuring gas temperatures remain within safe operating envelopes even during sustained maximum-capacity operation. The robust 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-52/8
| Parâmetro | Valor | Unidade |
|---|---|---|
| Modelo | LW-52/8 | – |
| Padrão | Dois estágios, duas filas (二列二级) | – |
| Capacidade | 52 | m³/min |
| Pressão de descarga | 0.80 | MPa |
| Dimensões do compressor (C × L × A) | 2360 × 1655 × 2235 | mm |
| Peso | 6.00 | 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. Advanced Oil-Free PTFE Composite Sealing System
The LW-52/8 employs a proprietary conjunto de anel de pistão autolubrificante e cinta de guia manufactured from high-density PTFE composites reinforced with glass fiber and bronze particulates. This material formulation achieves a coefficient of friction below 0.06 without any external hydrocarbon lubrication, completely eliminating the risk of oil vapor carryover into the nitrogen product stream. For industrial gas operators, this translates to Conformidade nativa com a norma ISO 8573-1 Classe 0 without the capital cost, maintenance burden, or energy penalty of downstream oil-filtration equipment. The PTFE rings are specifically formulated for the elevated discharge temperatures associated with 0.80 MPa operation, maintaining dimensional stability up to 180°C.
2. Optimized Two-Stage Thermodynamic Design
O arquitetura de compressão de dois estágios of the LW-52/8 is thermodynamically optimized for the 0.80 MPa discharge pressure target. By dividing the 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 155°C even at maximum continuous load. This thermal management is critical for preserving PTFE ring integrity and extending valve plate service life by approximately 40% versus single-stage alternatives operating at equivalent pressure ratios.
3. Heavy-Duty Cast-Iron Frame with Inherent Force Balance
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 80% compared to single-row designs of equivalent capacity. This mechanical advantage permits installation on a lighter reinforced concrete inertia block (minimum 10 tonnes versus 15+ tonnes for single-row equivalents), significantly reducing civil engineering costs and simplifying retrofit installations in existing compressor houses where foundation capacity may be limited.
4. Medium-Voltage Motor Drive for Industrial Integration
The LW-52/8 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 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-52/8 offers plug-and-play electrical compatibility.
Cenários de aplicação
Large-Scale Cryogenic Air Separation Plants
In large cryogenic ASU facilities producing 2,000–5,000 Nm³/h of gaseous nitrogen, the LW-52/8 serves as the primary high-pressure nitrogen booster between the cold box and the distribution header. Its 52 m³/min capacity matches the output of large-scale ASUs, while the 0.80 MPa discharge pressure provides sufficient head for long-distance pipeline distribution to downstream consumers such as integrated steel mills, petrochemical complexes, and LNG regasification terminals. The oil-free design is critical in these applications because any oil contamination would compromise the purity of nitrogen supplied to sensitive processes, particularly in semiconductor and pharmaceutical manufacturing facilities 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-52/8 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 multiple consumers through a centralized header, where pressure losses across the distribution network can be substantial. The oil-free compression path is absolutely essential in VPSA service because hydrocarbon contamination would irreversibly poison the carbon molecular sieve adsorbent, degrading separation efficiency and necessitating costly adsorbent replacement.
Petrochemical High-Pressure Nitrogen Injection
In petrochemical and refinery operations, the LW-52/8 provides high-pressure nitrogen for reactor inerting, catalyst preservation, pipeline purging, and emergency nitrogen injection into process vessels. The 0.80 MPa discharge pressure is sufficient to overcome the pressure ratings of typical process vessels and reactor systems, allowing direct nitrogen injection without intermediate boosting. The continuous-duty rating ensures uninterrupted nitrogen availability during extended turnaround and maintenance 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 hydrocarbon-free.
Steel Mill Inerting & Blast Furnace Gas Sealing
Integrated steel mills require massive volumes of nitrogen for blast furnace gas sealing, tundish inerting, and ladle metallurgy operations. The LW-52/8’s 52 m³/min capacity can serve multiple blast furnaces or continuous casting lines simultaneously through a centralized high-pressure nitrogen header. The 0.80 MPa discharge pressure provides adequate head to overcome the back-pressure of blast furnace gas systems and maintain positive sealing gas flow at tuyere level. 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.
Materiais e construção
The LW-52/8 is constructed from premium materials selected for nitrogen compatibility, high-pressure service, and extended operational life:
| 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-Bronze | Autolubrificante, resistente a altas temperaturas até 180°C. |
| Pulseiras de motociclista | Compósito de PTFE | Guia do pistão, anti-desgaste por atrito, taxa de desgaste <0,04 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 | Design com tubos aletados, adequado para água de refrigeração a 32°C. |
| 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-52/8 has a dry weight of 6.00 tonnes and a center of gravity approximately 900 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 10–12 tonnes. The block should be mounted on elastomeric vibration isolators (natural frequency 6–8 Hz) to prevent vibration transmission to adjacent structures and 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 55 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 | Meça a folga na ranhura do anel; substitua os anéis se a folga exceder 0,25 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-52/8 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-52/8 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-52/8 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-52/8 achieves a specific power consumption of approximately 6.73 kW per m³/min of nitrogen delivered at 0.80 MPa discharge pressure. This efficiency metric is commendable for an oil-free piston compressor operating at an elevated pressure ratio, positioning the unit favorably within the 40–60 m³/min capacity class. For comparison, oil-lubricated screw compressors in similar high-pressure applications typically consume 7.0–7.8 kW/m³/min, while legacy single-stage piston designs may exceed 8.5 kW/m³/min at equivalent discharge pressures.
Over a standard 8,000-hour annual operating schedule, the LW-52/8’s efficiency advantage generates approximately 112,000–280,000 kWh of annual energy savings compared to less efficient alternatives. At an average industrial electricity tariff of $0.08/kWh, this represents $8,960–$22,400 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 is reduced by an estimated 20–30% over a 10-year operational life.
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-52/8’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-52/8 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 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: Steel Mill Nitrogen Distribution Upgrade
Cliente: An integrated steel mill in Southeast Asia with two blast furnaces and four continuous casting lines
Desafio: The mill’s existing nitrogen supply consisted of two aging oil-lubricated compressors (European brand, 18 years in service) feeding a common 0.60 MPa distribution header. The compressors were experiencing frequent oil carryover into the nitrogen stream, contaminating blast furnace gas sealing systems and causing tundish nozzle clogging during continuous casting. Maintenance costs had escalated to $85,000/year due to oil-related repairs, and the 0.60 MPa pressure was insufficient for new high-pressure tundish inerting requirements.
Solução: Nós fornecemos um LW-52/8 oil-free nitrogen compressor as a replacement for the primary compressor, configured on a custom skid with integrated intercooler, aftercooler, and a Siemens S7-1200 PLC control panel with SCADA integration. The 0.80 MPa discharge pressure met the new tundish inerting requirements, while the oil-free design eliminated contamination of blast furnace gas and casting systems. A 5 m³ surge vessel was installed upstream to buffer demand fluctuations from the casting lines.
Resultados quantificados após 24 meses:
- Teor de nitrogênio no óleo: Reduced from 4.2 mg/m³ to <0.01 mg/m³, obtendo a certificação ISO 8573-1 Classe 0
- Tundish nozzle clogging incidents: Eliminado completamente, improving casting yield by 1.2%
- Custo anual de manutenção: Reduced by 45% ($85,000 to $46,750) through elimination of oil-related repairs
- Consumo de energia: Improved by 6.8% versus the replaced unit, saving approximately $19,200/year
- Tempo de inatividade não planejado: Eventos zero in 24 months of continuous operation
“The LW-52/8 has transformed our nitrogen supply from a maintenance headache into a reliable utility. The elimination of oil contamination has improved our casting quality and reduced nozzle replacements by 80%. The payback period was under 20 months.” — Chief Engineer, Steel Mill Operations
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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 Optimize Your High-Pressure Nitrogen System?
Nossos engenheiros de aplicação estão à disposição para avaliar suas necessidades de vazão de nitrogênio, condições de sucção, metas de pressão de descarga e restrições de integração. Fornecemos propostas técnicas gratuitas, desenhos de layout de fundações, diagramas de tubulação e instrumentação (P&IDs) e análises detalhadas do custo total de propriedade (TCO) em até 48 horas após o recebimento da sua solicitação.
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