{"id":548,"date":"2026-07-20T03:48:50","date_gmt":"2026-07-20T03:48:50","guid":{"rendered":"https:\/\/n2-compressor.com\/?post_type=product&p=548"},"modified":"2026-07-20T03:49:41","modified_gmt":"2026-07-20T03:49:41","slug":"zw-6-7-nitrogen-compressor","status":"publish","type":"product","link":"https:\/\/n2-compressor.com\/es\/producto\/zw-6-7-nitrogen-compressor\/","title":{"rendered":"Compresor de nitr\u00f3geno ZW-6\/7: compresor de N2 de precisi\u00f3n sin aceite para aplicaciones de procesos de presi\u00f3n media."},"content":{"rendered":"
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Compresor de nitr\u00f3geno ZW-6\/7: compresor de N2 de precisi\u00f3n sin aceite para aplicaciones de procesos de presi\u00f3n media.<\/h1>\n

Delivering 6 m\u00b3\/min at 0.70 MPa discharge pressure, the ZW-6\/7 is a two-stage, two-row oil-free piston nitrogen compressor engineered for precision process control, small-scale VPSA nitrogen boosting, and medium-pressure industrial gas distribution. Zero lubricant contamination, compact footprint, and optimized for reliable continuous-duty operation.<\/p>\n

Solicitar presupuesto<\/a>
\nVer la serie de compresores N2<\/a><\/div>\n

\"ZW-6\/7<\/p>\n<\/div>\n

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Descripci\u00f3n general del producto<\/h2>\n

El ZW-6\/7 nitrogen compressor<\/strong> is a precision-engineered member of our oil-free piston compressor family, purpose-built for applications demanding both compact dimensions and elevated discharge pressure. With a rated capacity of 6 m\u00b3\/min<\/strong> y una presi\u00f3n de descarga de 0,70 MPa<\/strong>, this unit occupies a unique niche between small laboratory compressors and large industrial boosters, serving process industries that require medium-pressure nitrogen in moderate flow quantities.<\/p>\n

Unlike conventional lubricated compressors that necessitate elaborate downstream purification trains, the ZW-6\/7 operates on a fully oil-free compression principle<\/strong>. Its PTFE composite piston rings and rider bands function without hydrocarbon lubricants, ensuring the nitrogen product stream maintains ISO 8573-1 Class 0 oil content certification. This inherent purity is indispensable for pharmaceutical process inerting, electronics soldering atmosphere control, and precision chemical synthesis where even trace oil contamination can compromise product integrity.<\/p>\n

El dos etapas, dos filas (\u4e8c\u5217\u4e8c\u7ea7)<\/strong> architecture divides the compression workload across paired cylinders, with an inter-stage cooler maintaining gas temperatures within safe thermal envelopes. Despite its modest 6 m\u00b3\/min capacity, the ZW-6\/7 achieves a 0.70 MPa discharge pressure through optimized thermodynamic staging\u2014delivering the pressure performance of larger units within a footprint of just 720 \u00d7 763 \u00d7 1475 mm<\/strong> and a weight of 0.80 tonnes<\/strong>.<\/p>\n

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

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Technical Specifications \u2013 ZW-6\/7<\/h2>\n
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Par\u00e1metro<\/th>\nValor<\/th>\nUnidad<\/th>\n<\/tr>\n<\/thead>\n
Modelo<\/td>\nZW-6\/7<\/td>\n\u2013<\/td>\n<\/tr>\n
Patr\u00f3n<\/td>\nDos etapas, dos filas (\u4e8c\u5217\u4e8c\u7ea7)<\/td>\n\u2013<\/td>\n<\/tr>\n
Capacidad<\/td>\n6<\/td>\nm\u00b3\/min<\/td>\n<\/tr>\n
Presi\u00f3n de descarga<\/td>\n0.70<\/td>\nMPa<\/td>\n<\/tr>\n
Dimensiones del compresor (largo \u00d7 ancho \u00d7 alto)<\/td>\n720 \u00d7 763 \u00d7 1475<\/td>\nmm<\/td>\n<\/tr>\n
Peso<\/td>\n0.80<\/td>\nt<\/td>\n<\/tr>\n
Fuerza<\/td>\n45<\/td>\nkW<\/td>\n<\/tr>\n
Voltaje<\/td>\n380<\/td>\nV<\/td>\n<\/tr>\n
Medio gaseoso<\/td>\nNitr\u00f3geno (N\u2082)<\/td>\n\u2013<\/td>\n<\/tr>\n
Lubricaci\u00f3n<\/td>\nSin aceite<\/td>\n\u2013<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* Todas las especificaciones se basan en condiciones de referencia est\u00e1ndar (ISO 1217, Anexo C). El rendimiento real puede variar seg\u00fan la altitud del lugar, la temperatura ambiente y las condiciones de entrada.<\/em><\/p>\n<\/div>\n

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Caracter\u00edsticas principales y ventajas de ingenier\u00eda<\/h2>\n

1. Ultra-Compact Vertical Design<\/h3>\n

The ZW-6\/7 achieves exceptional space efficiency through a vertically oriented crankcase<\/strong> that minimizes longitudinal footprint while preserving full maintenance access. At 720 \u00d7 763 \u00d7 1475 mm<\/strong>, the unit occupies less than 0.55 m\u00b2 of floor area\u2014comparable to a standard office desk. This dimensional economy makes the ZW-6\/7 ideal for installations in crowded utility rooms, containerized systems, mobile nitrogen supply trailers, and retrofit applications where existing machinery rooms lack space for larger equipment. The 0.80-tonne weight permits positioning by standard pallet jack or manual hydraulic lift, eliminating the need for overhead cranes or forklift equipment.<\/p>\n

2. Sistema de sellado avanzado de PTFE sin aceite<\/h3>\n

The ZW-6\/7 employs a Conjunto de anillo de pist\u00f3n autolubricante y banda de apoyo<\/strong> manufactured from high-density PTFE composites reinforced with glass fiber and bronze micro-particles. This material matrix achieves a dynamic coefficient of friction below 0.08 without any hydrocarbon lubricant, delivering Contenido de aceite seg\u00fan la norma ISO 8573-1 Clase 0<\/strong> certification directly at the compressor discharge. For process industries where nitrogen purity is non-negotiable\u2014such as pharmaceutical sterile manufacturing, electronics wafer fabrication, and food-grade packaging\u2014this native oil-free performance eliminates the capital expense, energy penalty, and maintenance burden of downstream coalescing filters, activated carbon adsorbers, and oil monitoring instrumentation.<\/p>\n

3. Two-Stage Thermodynamic Optimization for 0.70 MPa<\/h3>\n

El two-stage, two-row compression architecture<\/strong> is specifically optimized for the 0.70 MPa discharge pressure target. The first-stage cylinder compresses nitrogen from suction pressure to an intermediate pressure, after which a shell-and-tube intercooler reduces the gas temperature before second-stage compression to final discharge pressure. This staged approach limits the pressure ratio per cylinder to approximately 2.6:1, maintaining discharge temperatures below 145\u00b0C and preventing thermal degradation of the PTFE sealing elements. The two-row opposed-cylinder arrangement provides inherent first-order force balance, reducing vibration transmission to the foundation by over 80% compared to single-row designs of equivalent capacity.<\/p>\n

4. Efficient 45 kW 380V Direct Drive<\/h3>\n

The ZW-6\/7 is driven by a 45 kW, 380V, 50Hz three-phase induction motor<\/strong> conforming to IEC 60034-1 IE3 premium efficiency standards. The standard 380V configuration integrates directly into conventional industrial electrical panels without requiring medium-voltage infrastructure, specialized switchgear, or step-down transformers. This electrical simplicity is particularly advantageous for small and medium enterprises upgrading from bottled nitrogen or membrane generators to on-site compression, as it minimizes electrical installation costs and commissioning complexity. The motor is direct-coupled to the crankshaft via a flexible disc coupling, eliminating belt maintenance and alignment issues.<\/p>\n

\"ZW-6\/7<\/p>\n<\/div>\n

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Escenarios de aplicaci\u00f3n<\/h2>\n

Small-Scale VPSA Nitrogen Booster Stations<\/h3>\n

For compact VPSA nitrogen generators producing 500\u20131,500 Nm\u00b3\/h of 99.5\u201399.9% purity nitrogen at near-atmospheric pressure, the ZW-6\/7 serves as the ideal booster companion<\/strong>. Its 6 m\u00b3\/min capacity aligns with the output of small to medium VPSA units, while the 0.70 MPa discharge pressure provides sufficient head for distribution to multiple point-of-use stations within a facility. The ZW-6\/7 nitrogen booster<\/a> can be skid-mounted alongside the VPSA generator, creating a fully integrated on-site nitrogen supply system with a combined footprint under 15 m\u00b2. The oil-free compression path is essential because any hydrocarbon contamination would irreversibly poison the carbon molecular sieve adsorbent, degrading separation efficiency and necessitating costly adsorbent replacement.<\/p>\n

\"ZW-6\/7<\/p>\n

Pharmaceutical Process Inerting & Sterile Manufacturing<\/h3>\n

Pharmaceutical manufacturing facilities require nitrogen for reactor inerting, sterile powder conveying, vial headspace purging, and lyophilization chamber atmosphere control<\/strong>. The ZW-6\/7’s 0.70 MPa discharge pressure is well-suited for feeding medium-pressure nitrogen headers serving multiple process skids, while its oil-free certification ensures compliance with FDA 21 CFR 211 (Current Good Manufacturing Practice) and EU GMP Annex 1 (Manufacture of Sterile Medicinal Products). The compact dimensions allow installation within existing pharmaceutical utility corridors without disrupting cleanroom layouts or requiring structural modifications.<\/p>\n

Electronics Assembly & Semiconductor Support<\/h3>\n

In electronics manufacturing, nitrogen is deployed for reflow soldering atmosphere control, wave soldering inerting, dry cabinet storage, and component tape-and-reel packaging<\/strong>. The ZW-6\/7’s 6 m\u00b3\/min capacity can simultaneously supply multiple soldering lines and storage cabinets within a medium-sized electronics assembly facility. The oil-free design is absolutely critical in this sector because even sub-ppm oil contamination can cause solder joint defects, conformal coating delamination, and contamination of optical sensors or camera modules. The 0.70 MPa pressure provides adequate head for nitrogen distribution through standard polyethylene or copper piping networks spanning up to 500 meters.<\/p>\n

\"ZW-6\/7<\/p>\n

Precision Chemical Synthesis & Catalyst Protection<\/h3>\n

Specialty chemical manufacturers and catalyst producers utilize nitrogen for reactor blanketing, catalyst bed preservation, solvent degassing, and product transfer under inert atmosphere<\/strong>. The ZW-6\/7’s 0.70 MPa discharge pressure is sufficient for pressurized transfer of sensitive chemicals between process vessels and for maintaining positive pressure in catalyst storage silos. The oil-free compression ensures that no hydrocarbon contaminants are introduced into the process stream, which is particularly important for catalyst manufacturing where trace oil can poison active sites and reduce catalytic efficiency by 15\u201330%.<\/p>\n<\/div>\n

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Materiales y construcci\u00f3n<\/h2>\n

The ZW-6\/7 is fabricated from materials meticulously selected for nitrogen compatibility, corrosion resistance, and compact structural integrity:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Componente<\/th>\nMaterial<\/th>\nEspecificaci\u00f3n<\/th>\n<\/tr>\n<\/thead>\n
Bloque de cilindros<\/td>\nHierro fundido gris<\/td>\nGG25 \/ HT250, precision-machined bores<\/td>\n<\/tr>\n
Cig\u00fce\u00f1al<\/td>\nAcero aleado forjado<\/td>\n42CrMo4, Q&T, ISO 1940 G2.5 equilibrado<\/td>\n<\/tr>\n
Anillos de pist\u00f3n<\/td>\nCompuesto de PTFE, vidrio y bronce<\/td>\nSelf-lubricating, wear rate <0.04 mm\/1000h<\/td>\n<\/tr>\n
Bandas de jinete<\/td>\nCompuesto de PTFE<\/td>\nPiston lateral guidance, anti-scuffing<\/td>\n<\/tr>\n
Placas de v\u00e1lvulas<\/td>\nAcero inoxidable<\/td>\nAcero inoxidable SS316, anillo conc\u00e9ntrico con resorte<\/td>\n<\/tr>\n
Intercooler<\/td>\nCarcasa de acero al carbono \/ Tubos de acero inoxidable SS304<\/td>\nCompact design, 1.5\u00d7 hydrotest<\/td>\n<\/tr>\n
Marco base<\/td>\nAcero estructural<\/td>\nWelded, vibration-isolated mounting pads<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All pressure-bearing components are designed and manufactured in accordance with ASME BPVC Secci\u00f3n VIII Divisi\u00f3n 1<\/strong> or Chinese GB 150 standards. Weld joints undergo 100% radiographic inspection (RT), and each pressure vessel is hydrostatically tested at 1.5\u00d7 MAWP for a minimum 30-minute hold period. The compact intercooler is specifically engineered for the ZW-6\/7’s flow rate and pressure ratio, with tube-side velocities optimized for heat transfer efficiency without excessive pressure drop.<\/p>\n

\"ZW-6\/7<\/p>\n<\/div>\n

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Gu\u00eda de instalaci\u00f3n y mantenimiento<\/h2>\n

Requisitos de cimentaci\u00f3n y espaciales<\/h3>\n

The ZW-6\/7 weighs just 0.80 tonnes and features a remarkably low center of gravity due to its vertical design. A losa de hormig\u00f3n armado de 1,5 a 2,0 toneladas<\/strong> is sufficient for stable operation, mounted on elastomeric vibration isolators (natural frequency 10\u201315 Hz). The two-row opposed-cylinder design inherently cancels first-order inertial forces, minimizing vibration transmission to adjacent sensitive equipment such as analytical balances or optical instruments. Required clearances: 0.6 m on the non-drive side for valve access, 0.5 m on the drive side for motor maintenance, and 1.0 m overhead for lifting the motor or compressor head.<\/p>\n

Especificaciones del agua de refrigeraci\u00f3n<\/h3>\n

La demanda de agua de refrigeraci\u00f3n es aproximadamente 8 m\u00b3\/h<\/strong> at an inlet temperature not exceeding 32\u00b0C. The compact intercooler and cylinder jackets share a common cooling water circuit. Acceptable water quality: pH 6.5\u20138.5, total hardness < 250 mg\/L as CaCO\u2083, chloride < 50 mg\/L, suspended solids < 20 mg\/L. For installations without municipal water supply, a small closed-loop cooling system with a 0.5 m\u00b3 buffer tank and compact air-blast cooler is sufficient.<\/p>\n

Programa de mantenimiento preventivo<\/h3>\n
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Intervalo<\/th>\nArt\u00edculo de servicio<\/th>\nAcci\u00f3n requerida<\/th>\n<\/tr>\n<\/thead>\n
A diario<\/td>\nInspecci\u00f3n operativa<\/td>\nCheck for leaks, abnormal vibration, cooling water flow, discharge temperature<\/td>\n<\/tr>\n
250 horas<\/td>\nValve Plate Check<\/td>\nInspect suction\/discharge valves for carbon buildup, spring fatigue, or cracking<\/td>\n<\/tr>\n
1.000 horas<\/td>\nPiston Ring Assessment<\/td>\nMeasure ring groove clearance; replace if > 0.18 mm<\/td>\n<\/tr>\n
4.000 horas<\/td>\nRevisi\u00f3n intermedia<\/td>\nReemplace todos los anillos de pist\u00f3n, las bandas de retenci\u00f3n y los conjuntos de placas de v\u00e1lvulas.<\/td>\n<\/tr>\n
8.000 horas<\/td>\nRevisi\u00f3n general<\/td>\nInspect crankshaft journals, measure bearing clearances, replace as required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

The oil-free architecture of the ZW-6\/7 eliminates the entire category of lubricant-related maintenance tasks. There are no oil changes to schedule, no oil analysis laboratory contracts to maintain, no filter elements to stock, and no oil separator cartridges to monitor. The sole recurring consumables are the Anillos de pist\u00f3n y bandas de retenci\u00f3n de PTFE<\/strong>, which typically achieve 4,000\u20136,000 hours of service life under clean nitrogen conditions. For a facility operating 6,000 hours per year, this translates to a single scheduled maintenance event annually.<\/p>\n

\"ZW-6\/7<\/p>\n<\/div>\n

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Certificaciones de cumplimiento y seguridad<\/h2>\n

The ZW-6\/7 nitrogen compressor meets or exceeds the following international standards and regulatory frameworks:<\/p>\n

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Equipos a presi\u00f3n<\/strong>
\nASME BPVC Secci\u00f3n VIII Div.1, GB 150-2011, PED 2014\/68\/EU M\u00f3dulo A<\/span><\/div>\n
Seguridad el\u00e9ctrica y de maquinaria<\/strong>
\nIEC 60034-1 (eficiencia IE3), IEC 60204-1, ISO 12100<\/span><\/div>\n
Calidad del aire libre de aceite<\/strong>
\nISO 8573-1 Clase 0 (Contenido de aceite), probado de forma independiente por T\u00dcV Rheinland.<\/span><\/div>\n
Calidad y medio ambiente<\/strong>
\nISO 9001:2015, ISO 14001:2015<\/span><\/div>\n<\/div>\n
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\u26a0\ufe0f Aviso de seguridad<\/strong><\/p>\n

Nitrogen is an odorless, colorless asphyxiant gas that displaces oxygen without warning. All ZW-6\/7 installations must incorporate continuous oxygen deficiency monitoring in the compressor room and adjacent corridors. Ventilation systems must be engineered to maintain ambient oxygen concentrations above 19.5% volume per OSHA 29 CFR 1910.146. Alarm interlocks should activate at 19.5% O\u2082 and trigger automatic compressor isolation at 18.0% O\u2082. Personnel entry into enclosed compressor rooms requires portable oxygen monitors, two-way communication, and a buddy system. Never enter a nitrogen-enriched atmosphere without self-contained breathing apparatus (SCBA).<\/p>\n<\/div>\n

\"ZW-6\/7<\/p>\n<\/div>\n

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An\u00e1lisis de rendimiento y eficiencia<\/h2>\n

The ZW-6\/7 achieves a specific power consumption of approximately 7.50 kW per m\u00b3\/min<\/strong> of nitrogen delivered at 0.70 MPa discharge pressure. While this specific power is higher than our larger LW-series models due to the reduced scale efficiency inherent in smaller compressors, it remains competitive within the sub-10 m\u00b3\/min oil-free piston segment. For comparison, oil-lubricated screw compressors in this capacity range typically consume 8.0\u20139.0 kW\/m\u00b3\/min, and diaphragm compressors (frequently specified for oil-free applications) can exceed 11 kW\/m\u00b3\/min.<\/p>\n

Over a 6,000-hour annual operating schedule, the ZW-6\/7’s efficiency advantage versus less efficient alternatives yields approximately 18,000\u201336,000 kWh of energy savings<\/strong> per year. At $0.08\/kWh, this represents $1,440\u2013$2,880 in annual electricity cost reduction. However, the dominant economic justification for ZW-6\/7 selection in most applications is the elimination of oil-related consumables and downstream purification infrastructure<\/strong> en lugar de ahorros marginales de energ\u00eda.<\/p>\n

El Coste total de propiedad para la compresi\u00f3n de nitr\u00f3geno<\/a> in small to medium applications is driven primarily by maintenance labor, consumables, and capital depreciation rather than energy. The ZW-6\/7’s oil-free design eliminates oil changes ($300\u2013600\/year), filter replacements ($150\u2013300\/year), separator cartridge changes ($400\u2013800\/year), and oil analysis ($100\u2013200\/year), delivering total consumable savings of $950\u2013$1,900 annually compared to lubricated alternatives. Additionally, the absence of downstream oil-removal equipment (coalescing filters, activated carbon adsorbers, oil monitors) eliminates capital costs of $8,000\u2013$15,000 and associated energy penalties of 3\u20135% of compressor power.<\/p>\n<\/div>\n

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Capacidades de personalizaci\u00f3n y fabricaci\u00f3n de equipos originales (OEM)<\/h2>\n

We offer extensive customization options to adapt the ZW-6\/7 to specific installation constraints, process requirements, and end-user preferences:<\/p>\n