Descripción
Compresor de nitrógeno ZW-8/6: compresor de N2 compacto y sin aceite para sistemas de gas industriales de baja presión.
Engineered to deliver 8 m³/min at 0.60 MPa discharge pressure, the ZW-8/6 is a two-stage, two-row oil-free piston nitrogen compressor designed for small-scale cryogenic air separation, laboratory nitrogen supply, and compact VPSA booster stations. Zero oil contamination, space-efficient footprint, and optimized for intermittent to continuous-duty operation.
Descripción general del producto
El ZW-8/6 nitrogen compressor represents a compact yet capable solution within our oil-free piston compressor family, specifically tailored for small-scale nitrogen boosting applications where space constraints and operational simplicity are paramount. With a rated capacity of 8 m³/min y una presión de descarga de 0.60 MPa, this unit occupies the entry-level segment of our industrial nitrogen compressor portfolio while maintaining the same engineering rigor as our larger models.
The ZW-8/6 distinguishes itself through a mecanismo de compresión completamente libre de aceite utilizing self-lubricating PTFE composite piston rings and rider bands. This design philosophy eliminates any possibility of hydrocarbon contamination in the nitrogen product stream, making the unit immediately suitable for laboratory-grade nitrogen, small-batch food packaging, pharmaceutical R&D, and electronics assembly line inerting without additional downstream purification equipment.
Es dos etapas, dos filas (二列二级) configuration delivers a higher pressure ratio than single-stage alternatives while maintaining thermal stability through inter-stage cooling. The compact dimensions—2250 × 1296 × 2200 mm—allow the ZW-8/6 to fit into existing machinery rooms, containerized installations, or mobile nitrogen supply skids where floor space is at a premium. At just 2.00 tonnes, the unit can be transported and positioned without heavy-lift equipment.
Technical Specifications – ZW-8/6
| Parámetro | Valor | Unidad |
|---|---|---|
| Modelo | ZW-8/6 | – |
| Patrón | Dos etapas, dos filas (二列二级) | – |
| Capacidad | 8 | m³/min |
| Presión de descarga | 0.60 | MPa |
| Dimensiones del compresor (largo × ancho × alto) | 2250 × 1296 × 2200 | mm |
| Peso | 2.00 | t |
| Fuerza | 55 | kW |
| Voltaje | 380 | V |
| Medio gaseoso | Nitrógeno (N₂) | – |
| Lubricación | Sin aceite | – |
* Todas las especificaciones se basan en condiciones de referencia estándar (ISO 1217, Anexo C). El rendimiento real puede variar según la altitud del lugar, la temperatura ambiente y las condiciones de entrada.
Características principales y ventajas de ingeniería
1. Compact Footprint for Space-Constrained Installations
En 2250 × 1296 × 2200 mm, the ZW-8/6 occupies less than 3 m² of floor space, making it one of the most compact oil-free nitrogen compressors in its capacity class. This dimensional efficiency is achieved through a vertically oriented crankcase design that minimizes the machine’s longitudinal footprint while maintaining adequate maintenance access. The 2.00-tonne weight permits installation using standard forklift equipment, eliminating the need for overhead cranes or specialized rigging during commissioning or relocation.
2. Oil-Free PTFE Sealing Technology
The ZW-8/6 employs a Sistema de anillos de pistón y bandas de guía autolubricantes constructed from high-performance PTFE composites. These rings operate with a coefficient of friction below 0.08 without any hydrocarbon lubricant, delivering Contenido de aceite según la norma ISO 8573-1 Clase 0 in the compressed nitrogen stream. For small-scale users such as analytical laboratories, food R&D facilities, and electronics manufacturers, this native oil-free certification eliminates the capital expense and maintenance burden of downstream oil-filtration systems that would otherwise be mandatory.
3. Two-Stage Compression for Higher Pressure Ratios
El arquitectura de dos etapas y dos filas divides the pressure ratio between a low-pressure cylinder and a high-pressure cylinder, with an inter-stage shell-and-tube cooler removing the heat of compression. This staged approach limits the discharge temperature of each stage to below 150°C, preventing thermal degradation of the PTFE sealing elements and extending valve plate life by approximately 30% compared to single-stage compressors operating at equivalent overall pressure ratios. The 0.60 MPa discharge pressure is particularly well-suited for medium-pressure nitrogen distribution in small industrial facilities.
4. Accionamiento de motor estándar de 380 V de conexión directa en línea.
The ZW-8/6 is powered by a Motor de inducción trifásico de 55 kW, 380 V, 50 Hz rated to IEC 60034-1 IE3 efficiency class. The standard low-voltage configuration integrates directly into existing 380V industrial distribution panels without requiring medium-voltage infrastructure, step-down transformers, or specialized switchgear. This electrical simplicity reduces both capital expenditure and commissioning complexity, making the ZW-8/6 an attractive option for facilities upgrading from bottled nitrogen or membrane generators to on-site compression.
Escenarios de aplicación
Small-Scale Cryogenic Air Separation Units
In compact cryogenic ASU installations producing 200–500 Nm³/h of gaseous nitrogen, the ZW-8/6 serves as the potenciador de nitrógeno primario between the cold box and the distribution network. Its 8 m³/min capacity aligns with the output of small-scale ASUs, while the 0.60 MPa discharge pressure provides sufficient head for distribution to nearby process equipment, laboratory fume hoods, or storage tank blanketing systems. The oil-free design is critical in these applications because small ASUs typically lack the extensive purification trains found in large facilities, making downstream oil contamination particularly problematic.
Compact VPSA Nitrogen Booster Stations
For small to medium VPSA nitrogen generators producing 99.5–99.9% purity nitrogen at near-atmospheric pressure, the ZW-8/6 nitrogen booster compresses the low-pressure product to 0.60 MPa for distribution. The compact footprint of the ZW-8/6 allows it to be mounted on the same skid as the VPSA generator, creating a fully integrated nitrogen supply system that occupies minimal floor space. The oil-free compression path protects the carbon molecular sieve from hydrocarbon poisoning, preserving the generator’s separation efficiency and extending adsorbent life.
Laboratory & Analytical Gas Supply
Research laboratories, analytical chemistry facilities, and university science departments require a reliable supply of high-purity nitrogen for gas chromatography, mass spectrometry, and inert atmosphere glove boxes. The ZW-8/6’s oil-free certification ensures that the nitrogen stream meets the stringent purity requirements of analytical instruments without requiring additional purification cartridges. The 8 m³/min capacity can support multiple GC-MS systems, ICP-MS instruments, and glove boxes operating simultaneously within a single laboratory building.
Electronics Manufacturing & Soldering Inerting
In electronics assembly facilities, nitrogen is used for wave soldering inerting, reflow oven atmosphere control, and component storage dry cabinets. The ZW-8/6’s 0.60 MPa discharge pressure is adequate for feeding nitrogen distribution manifolds serving multiple soldering lines and storage cabinets. The oil-free design is non-negotiable in electronics applications because even trace oil contamination can cause solder joint defects, conformal coating adhesion failures, and contamination of sensitive optical components.
Materiales y construcción
The ZW-8/6 is constructed from materials selected for nitrogen compatibility, corrosion resistance, and compact structural integrity:
| Componente | Material | Especificación |
|---|---|---|
| Bloque de cilindros | Hierro fundido gris | GG25 / HT250, conductos de refrigeración integrales |
| Cigüeñal | Acero aleado forjado | 42CrMo4, Q&T, equilibrado dinámicamente |
| Anillos de pistón | Compuesto de PTFE, vidrio y bronce | Autolubricante, sin aceite. |
| Bandas de jinete | Compuesto de PTFE | Guía del pistón, antidesgaste |
| Placas de válvulas | Acero inoxidable | Diseño de resorte de anillo concéntrico SS316 |
| Intercooler | Carcasa de acero al carbono / Tubos de acero inoxidable SS304 | Compact shell-and-tube, 1.5× hydrotest |
| Marco base | Acero estructural | Montaje soldado con amortiguación de vibraciones |
Todos los componentes sometidos a presión cumplen con ASME BPVC Sección VIII División 1 or Chinese GB 150 standards. Weld joints are subjected to 100% radiographic inspection (RT), and each pressure vessel undergoes hydrostatic testing at 1.5× MAWP for a minimum 30-minute hold period before release.
Guía de instalación y mantenimiento
Requisitos de cimentación y espaciales
The ZW-8/6 weighs 2.00 tonnes and features a low center of gravity due to its compact vertical design. A reinforced concrete pad of 3–4 tonnes Es suficiente para un funcionamiento estable, montado sobre aisladores de vibración elastoméricos (frecuencia natural de 8 a 12 Hz). La disposición de cilindros opuestos en dos filas cancela inherentemente las fuerzas inerciales de primer orden, minimizando la transmisión de vibraciones. Espacio libre requerido: 1,0 m en el lado opuesto al de accionamiento para el mantenimiento de la válvula, 0,8 m en el lado de accionamiento para el acceso al motor y 1,5 m por encima para el mantenimiento rutinario.
Especificaciones del agua de refrigeración
La demanda de agua de refrigeración es aproximadamente 12 m³/h at an inlet temperature not exceeding 32°C. The water distribution circuit feeds the cylinder jackets and intercooler in parallel. Acceptable water quality: pH 6.5–8.5, total hardness < 300 mg/L as CaCO₃, chloride < 50 mg/L, suspended solids < 30 mg/L. For installations without reliable municipal water supply, a compact closed-loop cooling tower with a 1 m³ buffer tank is recommended.
Intervalos de mantenimiento
| Intervalo | Artículo de servicio | Acción requerida |
|---|---|---|
| A diario | Verificación visual y operativa | Inspeccione si hay fugas, ruidos anormales o flujo de agua de refrigeración. |
| 250 horas | Inspección de la placa de válvulas | Compruebe si hay depósitos de carbono, fatiga del muelle o grietas en la placa. |
| 1.000 horas | Evaluación del desgaste de los anillos del pistón | Mida la holgura de la ranura; reemplácela si es > 0,20 mm. |
| 4.000 horas | Servicio intermedio | Reemplazar los anillos del pistón, las bandas de retención y los conjuntos de válvulas. |
| 8.000 horas | Revisión general | Inspeccione el cigüeñal, mida las holguras de los cojinetes y reemplácelos según sea necesario. |
The oil-free design of the ZW-8/6 dramatically simplifies maintenance compared to lubricated alternatives. There are no oil changes to schedule, no oil samples to analyze, no filter elements to replace, and no oil separator cartridges to monitor. The only consumable wear items are the Anillos de pistón y bandas de retención de PTFE, which typically achieve 4,000–6,000 hours of service under clean nitrogen conditions.
Certificaciones de cumplimiento y seguridad
The ZW-8/6 nitrogen compressor meets the following international standards and regulatory requirements:
ASME BPVC Sección VIII Div.1, GB 150-2011, PED 2014/68/EU Módulo A
IEC 60034-1 (eficiencia IE3), IEC 60204-1, ISO 12100
ISO 8573-1 Clase 0 (Contenido de aceite), probado por TÜV Rheinland
ISO 9001:2015, ISO 14001:2015
⚠️ Aviso de seguridad
Nitrogen is an odorless, colorless asphyxiant gas. All ZW-8/6 installations must include continuous oxygen monitoring in the compressor room and adjacent areas. Ventilation must maintain ambient oxygen above 19.5% per OSHA 29 CFR 1910.146. Alarm interlocks should trigger at 19.5% O₂ and hard shutdown at 18.0% O₂. Personnel entry into enclosed compressor rooms requires portable oxygen monitors and a buddy system.
Análisis de rendimiento y eficiencia
The ZW-8/6 achieves a specific power consumption of approximately 6.88 kW per m³/min of nitrogen at 0.60 MPa discharge pressure. While this specific power is higher than our larger LW-series models due to the reduced scale efficiency, it remains competitive within the sub-10 m³/min oil-free piston compressor segment. For comparison, oil-lubricated screw compressors in this size range typically consume 7.2–8.0 kW/m³/min, and diaphragm compressors (often selected for oil-free applications) can exceed 10 kW/m³/min.
Over an 8,000-hour annual operating cycle, the ZW-8/6’s efficiency advantage versus less efficient alternatives yields approximately 20,000–45,000 kWh of energy savings per year. At $0.08/kWh, this represents $1,600–$3,600 in annual electricity cost reduction. However, the primary economic driver for ZW-8/6 selection is typically the eliminación de consumibles relacionados con el petróleo y equipos de purificación posteriores en lugar de ahorros marginales de energía.
El Coste total de propiedad para la compresión de nitrógeno in small-scale applications is dominated by maintenance labor and consumables rather than energy. The ZW-8/6’s oil-free design eliminates oil changes ($400–800/year), filter replacements ($200–400/year), separator cartridge changes ($600–1,200/year), and oil analysis ($150–300/year), delivering a total consumable savings of $1,350–$2,700 annually compared to lubricated alternatives.
Capacidades de personalización y fabricación de equipos originales (OEM)
We provide flexible customization options to adapt the ZW-8/6 to specific installation constraints and end-user requirements:
- Paquetes montados sobre patines: Compresor, motor, enfriador y panel de control preensamblados sobre una plataforma de acero estructural con orificios para montacargas y argollas de elevación. Reduce la instalación en campo a solo la conexión eléctrica y la conexión del agua de refrigeración.
- Unidades móviles remolcables: The ZW-8/6 can be mounted on a road-legal trailer with integrated diesel generator, cooling system, and nitrogen storage, creating a fully mobile nitrogen supply unit for construction sites, pipeline maintenance, and emergency response.
- PLC y monitorización remota: PLC Siemens LOGO! o S7-1200 opcional con pantalla táctil HMI de 7 pulgadas, conectividad Ethernet y notificaciones de alarma por SMS/correo electrónico. Compatible con Modbus TCP/IP para integración SCADA.
- Recintos acústicos: Compact IP54-rated sound enclosure reducing noise from 82 dB(A) to 68 dB(A) at 1 meter, suitable for indoor installations in noise-sensitive environments such as laboratories and office-adjacent machinery rooms.
- Fabricantes de equipos originales y marcas privadas: Diseños de pintura personalizados, placas de identificación con la marca y paquetes de documentación adaptados al mercado local para distribuidores de equipos de gas e integradores de sistemas.
Las configuraciones personalizadas están disponibles en Cantidad mínima de pedido: 1 unidadLas propuestas de ingeniería se entregan normalmente en un plazo de 3 a 5 días hábiles. El plazo de entrega estándar es de 10 a 12 semanas; para pedidos que cumplan los requisitos, se ofrece la opción de entrega urgente en un plazo de 8 semanas.
Case Study: Laboratory Nitrogen Supply Upgrade
Cliente: A pharmaceutical research institute in Singapore
Desafío: The institute was purchasing liquid nitrogen in 200-liter dewars and vaporizing on-site for laboratory supply. Monthly nitrogen consumption reached 15,000 Nm³, with delivery costs, dewar rental fees, and vaporization losses consuming 40% of the annual gas budget. Additionally, liquid nitrogen deliveries were unreliable during public holidays and inclement weather, causing experiment delays.
Solución: Suministramos un ZW-8/6 oil-free nitrogen compressor paired with a small VPSA nitrogen generator (99.9% purity, 10 m³/min) on a common skid. The ZW-8/6 boosts the VPSA product from 0.08 MPa to 0.60 MPa for distribution through the existing laboratory nitrogen header. The entire system occupies 8 m² in a corner of the building’s utility room.
Resultados después de 18 meses:
- Costo del suministro de nitrógeno: Reducido en 52% frente a la compra y entrega de nitrógeno líquido
- Fiabilidad del suministro: Tiempo de actividad de 100% since commissioning, zero experiment delays due to gas shortage
- Pureza del nitrógeno: Constantemente >99,9% with oil content <0.01 mg/m³, exceeding analytical instrument requirements
- Carga de mantenimiento: Un servicio programado al año (4,000-hour interval), versus monthly dewar changeovers
- Periodo de recuperación de la inversión: 2.4 years based on gas cost savings alone
“The ZW-8/6 compressor has transformed our nitrogen supply from a logistical headache into a reliable utility. Our researchers no longer worry about gas availability, and the finance department appreciates the 50% cost reduction.” — Facilities Manager, Pharmaceutical Research Institute
Preguntas frecuentes y guía de selección
Productos y soluciones relacionados
Compresores de nitrógeno de gran capacidad de la serie LW
Compresores de pistón sin aceite de alto caudal (20–130 m³/min) para respaldo de unidades de separación de aire criogénicas, refuerzo de sistemas de bombeo de vapor y distribución por tuberías industriales. Presiones de descarga de 0,30 a 0,80 MPa.
Compresores de nitrógeno de alta presión serie DW
Compresores sin aceite de presión media a alta (0,40–2,00 MPa) para inyección de nitrógeno, presurización de tuberías y síntesis química. Capacidades de 2 a 130 m³/min.
Compresores de media presión serie MW
Compresores exentos de aceite de presión media (1,0–4,0 MPa) para el reciclaje de nitrógeno, la licuefacción de gases y la compresión de gases de proceso en operaciones petroquímicas.
Para obtener una descripción general completa de nuestros compresor de nitrógeno industrial Para obtener más información sobre nuestra gama de productos, que incluye compresores de oxígeno sin aceite, compresores de hidrógeno y soluciones para gases especiales, póngase en contacto con nuestro equipo de ingeniería o consulte nuestro catálogo en línea.
Ready to Upgrade Your Nitrogen Supply?
Nuestros ingenieros de aplicaciones están disponibles para revisar sus requisitos de flujo de nitrógeno, condiciones de entrada y especificaciones de presión de descarga. Ofrecemos propuestas técnicas, planos de diseño y análisis de costo total de propiedad (TCO) sin costo adicional en un plazo de 48 horas.
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