ZW-8/6 氮气压缩机 – 适用于低压工业气体系统的紧凑型无油氮气增压器

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.

产品概述

这 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 以及排放压力 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 completely oil-free compression mechanism 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.

Its 两级两排（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 毫米—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

* 所有规格均在标准参考条件下（ISO 1217，附录 C）测得。实际性能可能因现场海拔、环境温度和进气条件而异。

主要特性及工程优势

1. Compact Footprint for Space-Constrained Installations

At 2250 × 1296 × 2200 毫米, 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 自润滑活塞环和带状制动系统 constructed from high-performance PTFE composites. These rings operate with a coefficient of friction below 0.08 without any hydrocarbon lubricant, delivering ISO 8573-1 0级含油量 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

这 两级两排架构 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. Standard 380V Direct-On-Line Motor Drive

The ZW-8/6 is powered by a 55千瓦、380伏、50赫兹三相感应电机 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.

应用场景

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 primary nitrogen booster 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.

材料与施工

The ZW-8/6 is constructed from materials selected for nitrogen compatibility, corrosion resistance, and compact structural integrity:

所有承压部件均符合以下规定： ASME BPVC 第 VIII 节第 1 部分 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.

安装和维护指南

基础及空间要求

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 is sufficient for stable operation, mounted on elastomeric vibration isolators (natural frequency 8–12 Hz). The two-row opposed-cylinder arrangement inherently cancels first-order inertial forces, minimizing vibration transmission. Required clearances: 1.0 m on the non-drive side for valve maintenance, 0.8 m on the drive side for motor access, and 1.5 m overhead for routine service.

冷却水规格

冷却水需求量约为 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.

维护周期

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 聚四氟乙烯活塞环和活塞环带, which typically achieve 4,000–6,000 hours of service under clean nitrogen conditions.

合规与安全认证

The ZW-8/6 nitrogen compressor meets the following international standards and regulatory requirements:

性能与效率分析

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 淘汰与石油相关的消耗品和下游净化设备 而不是微不足道的节能。

这 氮气压缩的总拥有成本 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.

定制化和OEM能力

We provide flexible customization options to adapt the ZW-8/6 to specific installation constraints and end-user requirements:

• 撬装式组件： 预组装的压缩机、电机、冷却器和控制面板安装在带有叉车槽和吊环的结构钢底座上。现场安装仅需连接电源和冷却水即可。
• 移动拖车单元： 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及远程监控： Optional Siemens LOGO! or S7-1200 PLC with 7-inch HMI touchscreen, Ethernet connectivity, and SMS/email alarm notifications. Compatible with Modbus TCP/IP for SCADA integration.
• 声学封闭空间： 紧凑型 IP54 防护等级隔音罩，可将 1 米处的噪音从 82 分贝（A）降低到 68 分贝（A），适用于对噪音敏感的室内环境，例如实验室和办公室附近的机房。
• OEM 和自有品牌： 为燃气设备分销商和系统集成商提供定制涂装方案、品牌铭牌和本地化文档包。

可提供自定义配置 最小起订量 1 件工程方案通常会在 3-5 个工作日内交付。标准交付时间为 10-12 周；符合条件的订单可享受 8 周内加急交付服务。

Case Study: Laboratory Nitrogen Supply Upgrade

客户： A pharmaceutical research institute in Singapore

挑战： 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.

解决方案： 我们提供了 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.

18 个月后的结果：

• Nitrogen supply cost: 减少了 52% versus liquid nitrogen purchase and delivery
• Supply reliability: 100% uptime since commissioning, zero experiment delays due to gas shortage
• 氮气纯度： 始终 >99.9% with oil content <0.01 mg/m³, exceeding analytical instrument requirements
• 维护负担： One scheduled service per year (4,000-hour interval), versus monthly dewar changeovers
• 投资回收期： 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

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