{"id":599,"date":"2026-07-21T07:53:16","date_gmt":"2026-07-21T07:53:16","guid":{"rendered":"https:\/\/n2-compressor.com\/?post_type=product&p=599"},"modified":"2026-07-21T07:53:17","modified_gmt":"2026-07-21T07:53:17","slug":"zw-3-3-70-nitrogen-compressor","status":"publish","type":"product","link":"https:\/\/n2-compressor.com\/pt\/produto\/zw-3-3-70-nitrogen-compressor\/","title":{"rendered":"Compressor de nitrog\u00eanio ZW-3.3\/70 | Booster de N2 isento de \u00f3leo de 3,3 m\u00b3\/min para aplica\u00e7\u00f5es industriais de ultra-alta press\u00e3o de 7,00 MPa"},"content":{"rendered":"
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ZW-3.3\/70 Nitrogen Compressor \u2013 Ultra-High-Pressure Oil-Free N2 Booster for 7.00 MPa Demanding Applications<\/p>\n

Engineered to deliver 3.3 m\u00b3\/min at 7.00 MPa discharge pressure, the ZW-3.3\/70 is a two-stage, two-row oil-free piston nitrogen compressor designed for ultra-high-pressure nitrogen injection, gas cylinder filling, and critical petrochemical process applications. Zero oil contamination, heavy-duty construction, and optimized for continuous-duty operation at extreme pressure.<\/p>\n

Solicite um or\u00e7amento<\/a>
\nVeja a s\u00e9rie de compressores N2<\/a><\/div>\n

\"ZW-3.3\/70<\/p>\n<\/div>\n

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Vis\u00e3o geral do produto<\/h2>\n

O ZW-3.3\/70 nitrogen compressor<\/strong> represents the pinnacle of our oil-free piston compressor engineering, purpose-built for applications where ultra-high discharge pressure is the absolute requirement. With a rated capacity of 3.3 m\u00b3\/min<\/strong> e um excepcional 7.00 MPa discharge pressure<\/strong>, this unit occupies a specialized niche in the industrial gas compression landscape, serving the most demanding nitrogen boosting requirements in heavy industry.<\/p>\n

What distinguishes the ZW-3.3\/70 from all alternatives is its caminho de compress\u00e3o totalmente isento de \u00f3leo<\/strong> combined with extreme pressure capability. The piston rings and rider bands are fabricated from advanced self-lubricating PTFE composite materials specifically formulated for ultra-high-pressure service. This design ensures the nitrogen stream remains completely uncontaminated by hydrocarbons even at 7.00 MPa, where oil contamination would be most concentrated and most difficult to remove. For operators in oil & gas, aerospace, and critical manufacturing, this native oil-free certification eliminates the need for complex and expensive downstream purification trains.<\/p>\n

A arquitetura do compressor emprega um dois est\u00e1gios, duas linhas (\u4e8c\u5217\u4e8c\u7ea7)<\/strong> configuration that is thermodynamically essential for managing the extreme pressure ratio required to achieve 7.00 MPa from typical inlet conditions. Each stage is independently cooled through high-efficiency intercoolers, ensuring gas temperatures remain within safe operating envelopes and preserving the integrity of the PTFE sealing elements under the most severe thermal stress. The reinforced frame construction and heavy-duty crankshaft assembly are engineered for a minimum service life of 100,000 hours<\/strong> De acordo com os protocolos de manuten\u00e7\u00e3o padr\u00e3o.<\/p>\n

\"ZW-3.3\/70<\/p>\n<\/div>\n

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Technical Specifications \u2013 ZW-3.3\/70<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Par\u00e2metro<\/th>\nValor<\/th>\nUnidade<\/th>\n<\/tr>\n<\/thead>\n
Modelo<\/td>\nZW-3.3\/70<\/td>\n\u2013<\/td>\n<\/tr>\n
Padr\u00e3o<\/td>\nDois est\u00e1gios, duas filas (\u4e8c\u5217\u4e8c\u7ea7)<\/td>\n\u2013<\/td>\n<\/tr>\n
Capacidade<\/td>\n3.3<\/td>\nm\u00b3\/min<\/td>\n<\/tr>\n
Press\u00e3o de descarga<\/td>\n7.00<\/td>\nMPa<\/td>\n<\/tr>\n
Dimens\u00f5es do compressor (C \u00d7 L \u00d7 A)<\/td>\n1920 \u00d7 1900 \u00d7 2580<\/td>\nmm<\/td>\n<\/tr>\n
Peso<\/td>\n3.97<\/td>\nt<\/td>\n<\/tr>\n
Poder<\/td>\n75<\/td>\nkW<\/td>\n<\/tr>\n
Tens\u00e3o<\/td>\n380<\/td>\nV<\/td>\n<\/tr>\n
Meio gasoso<\/td>\nNitrog\u00eanio (N\u2082)<\/td>\n\u2013<\/td>\n<\/tr>\n
Lubrifica\u00e7\u00e3o<\/td>\nSem \u00f3leo<\/td>\n\u2013<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* Todas as especifica\u00e7\u00f5es s\u00e3o classificadas em condi\u00e7\u00f5es de refer\u00eancia padr\u00e3o (ISO 1217, Anexo C). O desempenho real pode variar dependendo da altitude do local, da temperatura ambiente e das condi\u00e7\u00f5es de entrada.<\/em><\/p>\n<\/div>\n

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Principais caracter\u00edsticas e vantagens de engenharia<\/h2>\n

1. Ultra-High-Pressure Oil-Free PTFE Sealing Technology<\/h3>\n

The ZW-3.3\/70 employs a proprietary conjunto de anel de pist\u00e3o autolubrificante e cinta de guia<\/strong> manufactured from ultra-high-performance PTFE composites specifically engineered for 7.00 MPa service. These rings are reinforced with high-density glass fiber and bronze particulates to achieve a coefficient of friction below 0.05 without any external hydrocarbon lubrication. At 7.00 MPa discharge pressure, the partial pressure of oil vapor would be approximately 23 times higher than at 0.30 MPa, making oil contamination catastrophic and virtually impossible to remove downstream. The ZW-3.3\/70’s native oil-free design delivers Conformidade com a norma ISO 8573-1 Classe 0<\/strong> without any downstream filtration, a feat that is technically impossible for lubricated compressors at this pressure level. The PTFE formulation is rated for continuous operation at temperatures up to 200\u00b0C, ensuring sealing integrity under the extreme thermal stress of ultra-high-pressure compression.<\/p>\n

2. Compress\u00e3o em dois est\u00e1gios para rela\u00e7\u00f5es de press\u00e3o extremas<\/h3>\n

O arquitetura de compress\u00e3o de dois est\u00e1gios<\/strong> of the ZW-3.3\/70 is not merely preferred but absolutely mandatory for achieving 7.00 MPa from typical inlet pressures of 0.05\u20130.10 MPa. The overall pressure ratio of approximately 70:1 to 140:1 is split between a low-pressure cylinder and a high-pressure cylinder, with each stage operating at a thermodynamically manageable pressure ratio. A high-capacity shell-and-tube intercooler between stages removes the substantial heat of compression, maintaining discharge temperatures below 170\u00b0C and preventing thermal degradation of the PTFE sealing elements. Without staged compression, the theoretical discharge temperature would exceed 350\u00b0C, far beyond the safe operating limit of any known sealing material. The two-stage design also improves volumetric efficiency by reducing the re-expansion losses that would plague a single-stage machine at such extreme pressure ratios.<\/p>\n

3. Heavy-Duty Reinforced Frame for Ultra-High-Pressure Loads<\/h3>\n

A estrutura principal \u00e9 fundida a partir de GG25 ferro fundido cinzento<\/strong> with substantially reinforced wall sections, additional ribbing, and integral cooling water passages. The high-pressure cylinder features wall thicknesses approximately 40% greater than standard cylinders, with stress-relieving heat treatment after machining. The arranjo de cilindros opostos em duas fileiras<\/strong> provides natural first-order force cancellation, which is critical for ultra-high-pressure compressors where the peak gas forces on the pistons can exceed 50 tonnes per cylinder. This mechanical advantage reduces the unbalanced inertia forces transmitted to the foundation by over 80%, permitting installation on a reinforced concrete inertia block of 6\u20138 tonnes rather than the 12+ tonnes that would be required for a single-row design of equivalent pressure capability.<\/p>\n

4. Standard 380V Industrial Motor Drive with High-Torque Design<\/h3>\n

The ZW-3.3\/70 is driven by a Motor de indu\u00e7\u00e3o trif\u00e1sico de 75 kW, 380 V, 50 Hz<\/strong> conforming to IEC 60034-1 efficiency class IE3, with a high-torque design optimized for the starting loads of ultra-high-pressure piston compressors. The standard low-voltage configuration integrates directly into existing 380V industrial distribution panels without requiring medium-voltage infrastructure. The motor is oversized relative to the running power requirement to provide the high starting torque necessary to overcome the initial compression resistance when starting against 7.00 MPa discharge pressure. This electrical simplicity makes the ZW-3.3\/70 accessible to a wide range of industrial facilities regardless of their electrical infrastructure scale.<\/p>\n

\"ZW-3.3\/70<\/p>\n<\/div>\n

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Cen\u00e1rios de aplica\u00e7\u00e3o<\/h2>\n

Enchimento de cilindros de nitrog\u00eanio de ultra-alta press\u00e3o<\/h3>\n

The ZW-3.3\/70 is purpose-built for filling industrial and medical nitrogen cylinders to 15\u201320 MPa<\/strong> through a staged compression system. While the compressor’s 7.00 MPa discharge pressure does not reach cylinder filling pressure directly, it serves as a highly efficient first-stage booster that dramatically reduces the compression ratio required of the downstream high-pressure filling compressor. By boosting nitrogen from 0.05\u20130.10 MPa to 7.00 MPa, the ZW-3.3\/70 reduces the filling compressor’s required pressure ratio by approximately 60%, improving overall system efficiency and extending the life of the expensive high-pressure stage. The oil-free design is absolutely mandatory for cylinder filling because any oil contamination would be trapped in the cylinders and delivered to end-users, potentially contaminating their processes and violating gas quality standards.<\/p>\n

\"ZW-3.3\/70<\/p>\n

Inje\u00e7\u00e3o de nitrog\u00eanio em po\u00e7os de petr\u00f3leo e g\u00e1s<\/h3>\n

In upstream oil and gas operations, the ZW-3.3\/70 nitrogen booster<\/a> provides high-pressure nitrogen for opera\u00e7\u00f5es de recupera\u00e7\u00e3o avan\u00e7ada de petr\u00f3leo (EOR), estimula\u00e7\u00e3o de po\u00e7os e eleva\u00e7\u00e3o a g\u00e1s<\/strong>. The 7.00 MPa discharge pressure is sufficient to inject nitrogen into reservoir formations at depths up to 2,000 meters, where reservoir pressures typically range from 5\u201315 MPa. The oil-free design is critical in oilfield applications because any oil contamination in the nitrogen would alter the wettability of the reservoir rock, reducing oil recovery efficiency and potentially causing formation damage. The compact footprint and 3.97-tonne weight allow the unit to be mounted on mobile skids for deployment to remote well sites.<\/p>\n

Aerospace Pressure Testing & Component Validation<\/h3>\n

Aerospace manufacturers and testing facilities require ultra-high-pressure nitrogen for pressure testing of aircraft components, hydraulic system validation, and fuel tank inerting system testing<\/strong>. The ZW-3.3\/70’s 7.00 MPa discharge pressure is adequate for hydrostatic and pneumatic testing of fuselage sections, landing gear components, and fuel system hardware. The oil-free certification ensures that test nitrogen meets the stringent cleanliness requirements of aerospace standards (AS9100, NADCAP), where even trace oil contamination could interfere with non-destructive testing or leave residues that affect component performance.<\/p>\n

\"ZW-3.3\/70<\/p>\n

High-Pressure Chemical Synthesis & Process Inerting<\/h3>\n

In chemical process industries, the ZW-3.3\/70 provides ultra-high-pressure nitrogen for high-pressure reactor inerting, catalyst bed preservation, and supercritical fluid extraction processes<\/strong>. The 7.00 MPa discharge pressure is sufficient to maintain inert atmospheres in high-pressure reactors operating at 5\u20136 MPa, providing a safety margin above the process pressure. The oil-free design is mandatory for chemical synthesis because oil contamination would poison catalysts, contaminate reaction products, and potentially create hazardous conditions in oxygen-sensitive reactions. The 3.3 m\u00b3\/min capacity can support multiple high-pressure reactors operating in parallel within a single process unit.<\/p>\n<\/div>\n

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Materiais e constru\u00e7\u00e3o<\/h2>\n

The ZW-3.3\/70 is constructed from premium materials selected for ultra-high-pressure nitrogen compatibility, extreme thermal resistance, and maximum structural integrity:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Componente<\/th>\nMaterial<\/th>\nEspecifica\u00e7\u00e3o<\/th>\n<\/tr>\n<\/thead>\n
Bloco de Cilindros (LP)<\/td>\nFerro fundido cinzento<\/td>\nGG25 \/ HT250, espessura de parede padr\u00e3o<\/td>\n<\/tr>\n
Bloco de Cilindros (HP)<\/td>\nFerro fundido cinzento<\/td>\nGG25 \/ HT250, reinforced wall + heavy ribbing, stress-relieved<\/td>\n<\/tr>\n
Cambota<\/td>\nA\u00e7o liga forjado<\/td>\n42CrMo4, Q&T, ISO 1940 G2.5 balanceado dinamicamente<\/td>\n<\/tr>\n
An\u00e9is de Pist\u00e3o<\/td>\nUltra-High-Pressure PTFE Composite<\/td>\nHigh-density glass fiber + bronze, 200\u00b0C rated, 7 MPa certified<\/td>\n<\/tr>\n
Pulseiras de motociclista<\/td>\nComp\u00f3sito de PTFE<\/td>\nPiston guidance, anti-scuffing, wear rate <0.03 mm\/1000h<\/td>\n<\/tr>\n
Placas de v\u00e1lvulas<\/td>\nA\u00e7o inoxid\u00e1vel<\/td>\nSS316, ultra-high-pressure concentric ring design<\/td>\n<\/tr>\n
Bielas<\/td>\nA\u00e7o forjado com mancais de metal antifric\u00e7\u00e3o<\/td>\nEngrenagem de biela robusta, usinada com precis\u00e3o e lubrificada a \u00f3leo.<\/td>\n<\/tr>\n
Intercooler<\/td>\nCarca\u00e7a em a\u00e7o carbono \/ Tubos em a\u00e7o inoxid\u00e1vel 316<\/td>\nASME VIII Div.1, teste hidrost\u00e1tico 1,5\u00d7, reten\u00e7\u00e3o de 30 min<\/td>\n<\/tr>\n
Resfriador posterior<\/td>\nCarca\u00e7a em a\u00e7o carbono \/ Tubos em a\u00e7o inoxid\u00e1vel 316<\/td>\nTubo aletado de alta press\u00e3o, adequado para \u00e1gua de refrigera\u00e7\u00e3o a 32\u00b0C.<\/td>\n<\/tr>\n
Tubula\u00e7\u00e3o de Alta Press\u00e3o<\/td>\nA\u00e7o inoxid\u00e1vel sem emendas<\/td>\nSS316, ANSI Class 900 flanges, 100% X-ray inspected<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Todos os componentes que suportam press\u00e3o s\u00e3o projetados e fabricados em estrita conformidade com ASME BPVC Se\u00e7\u00e3o VIII Divis\u00e3o 1<\/strong> or Chinese GB 150 standards. Every weld joint undergoes 100% radiographic inspection (RT) per ASME Section V, Article 2, and each completed pressure vessel is subjected to a hydrostatic pressure test at 1.5 times the maximum allowable working pressure (MAWP) for a minimum hold period of 30 minutes. High-pressure piping systems are fabricated from seamless SS316 with ANSI Class 900 flanged connections and are 100% X-ray inspected to ensure leak-tight integrity at 7.00 MPa operating pressure.<\/p>\n

\"ZW-3.3\/70<\/p>\n<\/div>\n

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Diretrizes de Instala\u00e7\u00e3o e Manuten\u00e7\u00e3o<\/h2>\n

Requisitos de funda\u00e7\u00e3o e estrutura<\/h3>\n

The ZW-3.3\/70 has a dry weight of 3.97 tonnes and a center of gravity approximately 800 mm above the baseplate. A reinforced concrete inertia block of 6\u20138 tonnes<\/strong> is required for stable operation, mounted on heavy-duty elastomeric vibration isolators (natural frequency 6\u20138 Hz). The two-row opposed-cylinder design cancels first-order inertial forces, but the ultra-high-pressure gas loads generate substantial frame stresses that require a robust foundation. Minimum clearance requirements: 1.2 m on the non-drive side for valve access, 1.0 m on the drive side for motor maintenance, and 1.8 m overhead for crane access. The high-pressure discharge piping must be properly supported with spring hangers and expansion joints to accommodate thermal expansion and prevent vibration-induced fatigue at 7.00 MPa.<\/p>\n

Projeto de Sistema de \u00c1gua de Refrigera\u00e7\u00e3o<\/h3>\n

A demanda de \u00e1gua para resfriamento \u00e9 de aproximadamente 15 m\u00b3\/h<\/strong> at an inlet temperature not exceeding 32\u00b0C. The water distribution circuit supplies the cylinder jackets and intercooler in parallel, with the intercooler receiving priority flow allocation due to its critical role in thermal management. Given the extreme pressure ratio, the intercooler must remove a substantial quantity of heat between stages to prevent thermal damage to the high-pressure cylinder’s PTFE sealing elements. Water quality specifications: pH 6.5\u20138.5, total dissolved solids < 500 mg\/L, chloride content < 30 mg\/L (strict limit for SS316 corrosion protection at high pressure), suspended solids < 20 mg\/L, and total hardness < 250 mg\/L as CaCO\u2083. A closed-loop cooling tower with side-stream filtration and chemical treatment is strongly recommended.<\/p>\n

Cronograma de Manuten\u00e7\u00e3o Preventiva<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Intervalo<\/th>\nItem de servi\u00e7o<\/th>\nA\u00e7\u00e3o necess\u00e1ria<\/th>\n<\/tr>\n<\/thead>\n
Di\u00e1rio<\/td>\nInspe\u00e7\u00e3o Operacional<\/td>\nCheck vibration, abnormal noise, cooling water flow, discharge pressure, temperature, leak detection<\/td>\n<\/tr>\n
200 horas<\/td>\nInspe\u00e7\u00e3o da placa da v\u00e1lvula<\/td>\nRemove and inspect suction\/discharge valves for carbon deposits, spring fatigue, cracking, seat wear<\/td>\n<\/tr>\n
800 hours<\/td>\nAvalia\u00e7\u00e3o do desgaste dos an\u00e9is do pist\u00e3o<\/td>\nMeasure ring groove clearance; replace rings if clearance exceeds 0.18 mm<\/td>\n<\/tr>\n
2.500 horas<\/td>\nRevis\u00e3o Intermedi\u00e1ria<\/td>\nReplace all piston rings, rider bands, and valve plate assemblies; inspect cylinder bores<\/td>\n<\/tr>\n
5.000 horas<\/td>\nRevis\u00e3o geral<\/td>\nInspect crankshaft journals, measure main bearing clearances, replace bearings if >0.06 mm; inspect frame<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

The oil-free design of the ZW-3.3\/70 dramatically simplifies maintenance compared to lubricated alternatives, though the ultra-high-pressure operation demands more frequent inspection than lower-pressure models. There are no oil changes, no oil analysis, no filter replacements, and no separator cartridge changes. The primary consumable wear items are the An\u00e9is de pist\u00e3o e an\u00e9is de guia de PTFE<\/strong>, which typically achieve 2,500\u20134,000 hours of service life under clean nitrogen conditions at 7.00 MPa. The high-pressure valve plates require more frequent inspection due to the extreme mechanical stress, with replacement intervals of 2,000\u20133,000 hours.<\/p>\n

\"ZW-3.3\/70<\/p>\n<\/div>\n

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Certifica\u00e7\u00f5es de Conformidade e Seguran\u00e7a<\/h2>\n

The ZW-3.3\/70 nitrogen compressor is designed, manufactured, and tested to meet or exceed the following international standards and regulatory frameworks:<\/p>\n

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Equipamentos sob press\u00e3o<\/strong>
\nASME BPVC Se\u00e7\u00e3o VIII Div.1, GB 150-2011, PED 2014\/68\/EU M\u00f3dulo A<\/span><\/div>\n
Seguran\u00e7a el\u00e9trica e de m\u00e1quinas<\/strong>
\nIEC 60034-1 (efici\u00eancia IE3), IEC 60204-1, ISO 12100 seguran\u00e7a de m\u00e1quinas<\/span><\/div>\n
Certifica\u00e7\u00e3o sem \u00f3leo<\/strong>
\nISO 8573-1 Classe 0 (Teor de \u00d3leo), testado independentemente pela T\u00dcV Rheinland.<\/span><\/div>\n
Qualidade e Meio Ambiente<\/strong>
\nISO 9001:2015, ISO 14001:2015<\/span><\/div>\n<\/div>\n
\u26a0\ufe0f Aviso de Seguran\u00e7a Cr\u00edtico \u2013 Opera\u00e7\u00e3o em Ultra-Alta Press\u00e3o<\/strong><\/p>\n

Nitrogen is classified as a simple asphyxiant gas. At 7.00 MPa discharge pressure, the stored energy in the compressed gas and the risk of rapid gas release are extreme. All ZW-3.3\/70 installations must incorporate: (1) Continuous oxygen deficiency monitoring in the compressor room and all adjacent areas; (2) High-pressure discharge piping equipped with pressure relief valves rated at 110% of MAWP and rupture discs as secondary protection; (3) Emergency isolation valves on both suction and discharge that close automatically on alarm; (4) Ventilation systems maintaining ambient oxygen above 19.5% per OSHA 29 CFR 1910.146; (5) Emergency shutdown interlocks activating at 19.5% O\u2082 (alarm) and triggering hard isolation at 18.0% O\u2082; (6) Personnel trained in ultra-high-pressure gas safety protocols before operating or maintaining this equipment. All high-pressure piping must be inspected annually for corrosion, erosion, and mechanical damage.<\/p>\n<\/div>\n

\"ZW-3.3\/70<\/p>\n<\/div>\n

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An\u00e1lise de desempenho e efici\u00eancia<\/h2>\n

The ZW-3.3\/70 achieves a specific power consumption of approximately 22.73 kW per m\u00b3\/min<\/strong> of nitrogen delivered at 7.00 MPa discharge pressure. This specific power figure reflects the substantial thermodynamic work required for ultra-high-pressure compression from atmospheric inlet. Within the ultra-high-pressure oil-free compressor segment (discharge pressure >5.00 MPa), this efficiency is highly competitive. For comparison, diaphragm compressors\u2014the primary alternative for oil-free ultra-high-pressure service\u2014typically consume 25\u201335 kW\/m\u00b3\/min at equivalent pressures, while oil-lubricated reciprocating compressors consume 20\u201325 kW\/m\u00b3\/min but introduce unacceptable oil contamination.<\/p>\n

Over an 8,000-hour annual operating cycle, the ZW-3.3\/70’s efficiency advantage versus diaphragm compressors yields approximately 60,000\u2013120,000 kWh of annual energy savings<\/strong>. At $0.08\/kWh, this represents $4,800\u2013$9,600 in direct electricity cost reduction per year. However, the primary economic driver for ZW-3.3\/70 selection is typically the combination of oil-free certification, higher capacity, and lower capital cost<\/strong> compared to diaphragm alternatives. A diaphragm compressor with equivalent oil-free certification and 3.3 m\u00b3\/min capacity would cost 4\u20136 times more than the ZW-3.3\/70 and occupy significantly more space.<\/p>\n

O custo total de propriedade para compress\u00e3o de nitrog\u00eanio de ultra-alta press\u00e3o<\/a> is dominated by capital cost, maintenance labor, and equipment availability rather than marginal energy differences. The ZW-3.3\/70’s piston design offers superior maintainability compared to diaphragm compressors, with shorter overhaul times and lower spare parts costs. The absence of oil eliminates the need for expensive high-pressure oil-filtration systems that would be mandatory with lubricated alternatives at 7.00 MPa.<\/p>\n<\/div>\n

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Personaliza\u00e7\u00e3o e capacidades OEM<\/h2>\n

We offer comprehensive customization options to adapt the ZW-3.3\/70 to specific site conditions, integration requirements, and end-user specifications:<\/p>\n