Descripción
Where the ZR 145 VSD Sits in the Oil-Free Range
The ZR 145 VSD belongs to the ZR/ZT 75-160 VSD+ range, the oil-free line that Atlas Copco builds with dual NEOS drive bodies and a permanent magnet motor in every machine. Two drive modules give the ZR 145 VSD its 145 kW of installed power, and the VSD+ control sweeps them across a wide speed window so the flow follows the demand of the plant without unloaded running.
The platform shares one design from 75 to 160 kW, which keeps the service concept and the parts logic identical for every machine a plant operates beside it. The water-cooled machines one step down in this range are covered by the ZR 110 VSD.
The letter Z marks the oil-free architecture. The compression elements inject no oil into the air stream, so the delivered air carries no added oil and the machine serves food, pharmaceutical, electronics and textile processes that certify their air supply. The R marks the water-cooled branch: cooling water takes the heat out of the oil circuit, the elements and the motor, which keeps the package compact and stable in warm plant rooms.
Two Pressure Classes: 10.4 and 13 bar
The ZR 145 VSD comes as a 10.4 bar(e) machine and as a 13 bar(e) machine. In the 10.4 class the VSD+ Pack is rated at four pressure settings: at the minimum of 4 bar(e) it produces 78.2 to 430.6 l/s (165.6 to 912.3 cfm), at the effective setting of 7 bar(e) it produces 78.8 to 415.2 l/s (167 to 879.7 cfm).
At 9 bar(e) the machine delivers 78.6 to 383.2 l/s (166.5 to 811.9 cfm), and at the maximum of 10.4 bar(e) it still delivers 77.6 to 360.5 l/s (164.3 to 763.9 cfm).
The rated data of the VSD+ Pack lists the flow band at each of the four settings for the 50 Hz supply.
In the 13 bar class the Pack is rated from a minimum setting of 9 bar(e), where it produces 78.5 to 360.2 l/s (166.3 to 763.2 cfm), through an effective setting of 10.4 bar(e) with 77.2 to 359.6 l/s (163.6 to 762 cfm), up to the maximum of 13 bar(e) with 75.6 to 316.8 l/s (160.2 to 671.3 cfm).
A plant that runs high-pressure processes takes the 13 bar class and feeds its network straight from the package.
Technical Specifications of the ZR 145 VSD
The figures below are copied from the official ZR/ZT 75-160 VSD+ technical data. Unit performance is measured according to ISO 1217, Annex E, Edition 4 (2009), under the reference conditions of 0% relative humidity, 1 bar absolute inlet pressure and 20°C intake temperature. Free Air Delivery is measured at the effective working pressure.
Rated Data of the VSD+ Pack, 10.4 Class
The Pack build carries the compressor, the gear train, the drives and the controls in one water-cooled enclosure of 2500 kg (5512 lb). The four pressure settings of the 50 Hz supply read as follows.
| Escenario | Presión (bar(e)) | FAD (l/s) | FAD (cfm) |
|---|---|---|---|
| ZR 145 VSD+ – 10.4, Minimum | 4 | 78.2-430.6 | 165.6-912.3 |
| ZR 145 VSD+ – 10.4, Effective | 7 | 78.8-415.2 | 167-879.7 |
| ZR 145 VSD+ – 10.4, 9 bar setting | 9 | 78.6-383.2 | 166.5-811.9 |
| ZR 145 VSD+ – 10.4, Maximum | 10.4 | 77.6-360.5 | 164.3-763.9 |
Installed motor power stands at 145 kW (200 hp) across the settings, and the A-weighted emission sound pressure level at the work station reads 70 dB(A). The value is measured according to ISO 2151:2008 with the sound intensity scanning method of ISO 9614-2 and carries the total uncertainty of +/- 3 dB(A). At that level the water-cooled package stays well inside the sound range of an industrial hall.
Rated Data of the VSD+ Pack, 13 bar Class
The 13 bar class of the ZR 145 VSD shares the enclosure and the drive system and is rated at three pressure settings.
| Escenario | Presión (bar(e)) | FAD (l/s) | FAD (cfm) |
|---|---|---|---|
| ZR 145 VSD+ – 13, Minimum | 9 | 78.5-360.2 | 166.3-763.2 |
| ZR 145 VSD+ – 13, Effective | 10.4 | 77.2-359.6 | 163.6-762 |
| ZR 145 VSD+ – 13, Maximum | 13 | 75.6-316.8 | 160.2-671.3 |
The installed motor power stays at 145 kW (200 hp), and the emission sound pressure level of the 13 bar class reads 72 dB(A) under the same measurement basis. The 13 bar build carries its own engineering: special coating and seals designed for higher temperatures, an oil cooler redesigned for higher oil temperatures, gear sets selected for the 13 bar outlet pressure, and an optimized interstage pressure through high pressure stage speed control.
Datos nominales de la versión iMD con todas las funciones
The Full Feature build adds the integrated iMD dryer, the heat-of-compression unit that dries the air inside the same enclosure. Because the dryer works with heat the process already produces, the FAD band of the 10.4 class shifts to the ratings below.
| Escenario | Presión (bar(e)) | FAD (l/s) | FAD (cfm) |
|---|---|---|---|
| ZR 145 VSD+ – 10.4, Minimum | 6 | 79-431 | 167-914 |
| ZR 145 VSD+ – 10.4, Effective | 7 | 79-415 | 167-880 |
| ZR 145 VSD+ – 10.4, 9 bar setting | 9 | 79-383 | 167-812 |
| ZR 145 VSD+ – 10.4, Maximum | 10.4 | 78-361 | 164-764 |
The iMD package reads 3380 kg (7400 lb) in the published data, and the installed motor power stays at 145 kW (200 hp) across the settings.
Datos nominales del paquete iMDG Split
El modelo iMDG divide el concepto «Full Feature» en dos paquetes diseñados específicamente: el «Compressor Pack» y el secador de tambor, que constituye una unidad independiente en el suelo. Los datos nominales de este concepto dividido son los siguientes.
| Escenario | Presión (bar(e)) | FAD (l/s) | FAD (cfm) |
|---|---|---|---|
| ZR 145 VSD+ – 10.4, Minimum | 6 | 79-431 | 167-914 |
| ZR 145 VSD+ – 10.4, Effective | 7 | 79-415 | 167-880 |
| ZR 145 VSD+ – 10.4, 9 bar setting | 9 | 79-383 | 167-812 |
| ZR 145 VSD+ – 10.4, Maximum | 10.4 | 78-361 | 164-764 |
The iMDG concept reads 3720 kg (8220 lb) across the packages in the published data, and the split layout lets a plant place the dryer where the air network wants it, which shortens the piping between drying and point of use.
Dimensiones y peso
The 110-160 platform table that shares the footprint with this machine lists the standard enclosure at 2431 x 1660 x 2000 mm with a weight of 2920 kg, and the Full Feature build at 340.0 x 166.0 x 200.0 cm with a weight of 3720 kg. One floor bay takes the whole machine, and the water connections sit on the side the installation plan reserves for them.
Dos unidades NEOS sin pérdidas por descarga
Two NEOS drive bodies, each with its own permanent magnet motor, split the 145 kW of installed power between them. The VSD+ control divides the demand across the two modules and sweeps their speed with the plant load.
The ZR 145 VSD follows the demand curve without the unload and blow-off phases that waste energy on fixed-speed machines. The split between two modules lowers the mechanical and thermal load of each element at part load, and the Elektronikon controller keeps both drives inside their operating window as the flow follows the demand.
La refrigeración por agua y el recorrido del aire en dos etapas
Air enters the ZR 145 VSD through the inlet filter and passes the first compression stage, which lifts the pressure to an intermediate level. The pulsation dampener steadies the flow before the intercooler, the automated moisture separation removes the condensate, and the second stage brings the air to its final pressure with the efficiency that two-stage compression gives over a single stage at these ratios.
The cooling water serves the intercooler and aftercooler that condition the compressed air, the oil coolers that hold the oil temperature at its optimum, and the jackets of the motor and the elements. The oil loop pumps cooled oil through a high efficiency filter to the gear train, and bypass valves protect the filter while the pressure stays stable across the speed range of the drive.
Pureza del aire de clase 0 para procesos críticos
The ZR 145 VSD is certified to ISO 8573-1 Class 0, the strictest oil quality class of the standard, and the oil-free element design adds no oil to the air at any point of the speed window. Together with the ISO 1217 performance rating and the ISO 9001 manufacturing certificate, the machine carries the documents that audited processes ask for.
El secador integrado por calor de compresión
In the Full Feature builds the drying function uses the heat of compression instead of external energy. In the iMD package the whole drying function lives inside the compressor enclosure. In the iMDG split concept part of the main flow is cooled in the precooler and aftercooler while the remaining flow regenerates the adsorption drum, so the dryer imposes no purge loss on the network and no separate power feed.
Control y supervisión
The Elektronikon controller of the ZR 145 VSD manages the pressure band, the two drive modules and the dryer, and it logs the operating data that a maintenance team needs. The display shows the state of each module, and the controller communicates with plant systems so a central room can supervise several machines as one supply group. Service planners read the logged hours and the component states directly from the controller.
Opciones y soluciones de ingeniería
The platform options list adapts the machine to the site: energy recovery units that put the cooling heat to work, sound attenuation packages, connection sets for the water circuit, and control accessories that link the machine into a master-supply network. The build and the pressure class of the ZR 145 VSD are selected at order time, and the Pack, iMD and iMDG concepts share the same base design for later plant extensions.
Applications of the ZR 145 VSD
The water-cooled 145 kW step fits plants that run a continuous oil-free demand: PET and bottle lines, laboratories and central medical supplies, food and beverage halls, and textile mills that certify their air. The 13 bar class feeds high-pressure processes straight from the package, and the flow band of 75.6 to 430.6 l/s follows the batch rhythm of the production day.
Water cooling makes the ZR 145 VSD a natural choice in plants that already operate a cooling water circuit, because the package needs no ductwork to the outside and keeps its rated output in hot plant rooms. Where the site wants dry air without extra dryer hardware, the iMD and iMDG builds deliver Class 0 air with the dew point already controlled inside the supply.
Service and Support Around the ZR 145 VSD
Service access on the ZR 145 VSD follows the layout of the platform: one side of the enclosure carries the routine service points, and the fluid, filter and separator kits match the shared design of the 75-160 family. Atlas Copco backs the installed base with a global service organization, and the genuine parts of the machine follow the service plan that ships with it.
Preguntas frecuentes
What does the ZR 145 VSD deliver at maximum pressure?
The 10.4 bar class produces 77.6 to 360.5 l/s (164.3 to 763.9 cfm) at its maximum setting, and the 13 bar class produces 75.6 to 316.8 l/s (160.2 to 671.3 cfm) at 13 bar(e).
Is the ZR 145 VSD water-cooled?
Yes. The R in the model name marks the water-cooled branch, and the cooling water serves the intercooler, the aftercooler, the oil circuit and the jackets of the motor and the elements.
¿Hasta qué punto está libre de aceite el aire?
La máquina cuenta con la certificación ISO 8573-1 Clase 0, y el diseño sin aceite del elemento no añade aceite al flujo de aire a ninguna velocidad del control VSD+.
¿Cuál es la diferencia entre iMD e iMDG?
Both are heat-of-compression dryer concepts. The iMD integrates the dryer inside the compressor package, while the iMDG delivers the drum dryer as a separate engineered package that places where the air network needs it.
What is special about the 13 bar class?
The 13 bar class carries special coating and seals for higher temperatures, a redesigned oil cooler, gear sets selected for the 13 bar outlet pressure, and an optimized interstage pressure through high pressure stage speed control.
How loud is the ZR 145 VSD?
The rated emission sound pressure level at the work station is 70 dB(A) in the 10.4 class and 72 dB(A) in the 13 bar class, measured according to ISO 2151:2008 and ISO 9614-2 with a total uncertainty of +/- 3 dB(A).
Kari Taipale –
Our PET line needs oil-free air at high pressure, and the ZR 145 VSD delivers it straight from the package at the 13 bar setting. The water circuit matched our existing headers, both drive modules follow the blow cycle without unloading, and the integrated dryer keeps the dew point where our quality team wants it. Seadweer confirmed the build and the pressure class in one reply.