Catalogue-documented family

Variable Frequency Water-Lubricated Oil-Free Screw Air Compressor

Name: Variable Frequency Water-Lubricated Oil-Free Screw Air Compressor
Brand: Ever-Power

Demand-following oil-free compressed-air family with catalogue rows from 7.5 to 320 kW and working-pressure options of 0.8, 1.0 and 1.25 MPa. FAD is printed as a range for each model and pressure row.

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Variable Frequency Water-Lubricated Oil-Free Screw Air Compressor — Catalogue-derived compressor engineering visual for this product family; visible source logos and unrelated marks are excluded. Final configuration, dimensions and interfaces require an approved drawing.

17catalogue model codes

0.8–1.25 MPaprinted working pressures

7.5–320 kWprinted motor power range

Page 12source evidence

Catalogue technical data

Model and performance table

Source boundary: transcribed from supplied catalogue page 12. Values are reproduced as printed. Blank or merged-cell interpretation is not silently extrapolated. The approved quotation and drawing control the order.

Model	Pressure MPa	Pressure psi	FAD m³/min	FAD cfm	Power kW	Power HP	Noise dB(A)	Weight kg	Dimensions L×W×H mm	Source note
CM08PVF	0.8	116	0.45-1.15	16-41	7.5	10	58	630	1550×775×1445	air-cooled data
CM08PVF	1	145	0.41-1.02	14-36	7.5	10	58	500	1350×774×1150	water-cooled data
CM11PVF	0.8	116	0.62-1.55	22-55	11	15	58	650	1550×775×1445	air-cooled data
CM11PVF	1	145	0.53-1.32	19-47	11	15	58	520	1350×774×1150	water-cooled data
CM11PVF	1.25	181	0.48-1.02	17-36	11	15	58	520	1350×774×1150	water-cooled data
CM15PVF	0.8	116	0.96-2.40	34-85	15	20	63	900	1900×1000×1635	air-cooled data
CM15PVF	1	145	0.85-2.12	30-75	15	20	63	750	1680×1000×1335	water-cooled data
CM15PVF	1.25	181	0.64-1.61	23-57	15	20	63	750	1680×1000×1335	water-cooled data
CM18PVF	0.8	116	1.24-3.10	44-109	18.5	25	65	970	1900×1000×1635	air-cooled data
CM18PVF	1	145	1.05-2.62	37-93	18.5	25	65	820	1680×1000×1335	water-cooled data
CM18PVF	1.25	181	0.85-2.13	30-75	18.5	25	65	820	1680×1000×1335	water-cooled data
CM22PVF	0.8	116	1.40-3.50	49-124	22	30	65	1000	1900×1000×1635	air-cooled data
CM22PVF	1	145	1.25-3.13	44-111	22	30	65	850	1680×1000×1335	water-cooled data
CM22PVF	1.25	181	1.04-2.61	37-92	22	30	65	850	1680×1000×1335	water-cooled data
CM30PVF	0.8	116	2.00-5.00	71-177	30	40	66	1150	1950×1050×1780	air-cooled data
CM30PVF	1	145	1.68-4.20	59-148	30	40	66	1080	1900×1050×1430	water-cooled data
CM30PVF	1.25	181	1.52-3.18	54-112	30	40	66	1080	1900×1050×1430	water-cooled data
CM37PVF	0.8	116	2.44-6.10	86-215	37	50	67	1170	1950×1050×1780	air-cooled data
CM37PVF	1	145	2.09-5.22	74-184	37	50	67	1100	1900×1050×1430	water-cooled data
CM37PVF	1.25	181	1.92-4.81	68-170	37	50	67	1100	1900×1050×1430	water-cooled data
CM45PVF	0.8	116	3.12-7.80	110-275	45	60	68	1930	3040×1280×1800	air-cooled data
CM45PVF	1	145	2.45-6.13	87-216	45	60	68	1430	2200×1350×1530	water-cooled data
CM45PVF	1.25	181	2.26-5.65	80-200	45	60	68	1430	2200×1350×1530	water-cooled data
CM55PVF	0.8	116	3.84-9.60	136-339	55	75	70	2050	3040×1280×1800	air-cooled data
CM55PVF	1	145	3.44-8.60	121-304	55	75	70	1550	2200×1350×1530	water-cooled data
CM55PVF	1.25	181	2.97-7.42	105-262	55	75	70	1550	2200×1350×1530	water-cooled data
CM75PVF	0.8	116	5.16-12.90	182-455	75	100	73	2450	3040×1280×1800	air-cooled data
CM75PVF	1	145	4.57-11.42	161-403	75	100	73	1790	2200×1350×1530	water-cooled data
CM75PVF	1.25	181	3.93-9.83	139-347	75	100	73	1790	2200×1350×1530	water-cooled data
CM90PVF	0.8	116	6.52-16.30	230-576	90	125	73	3900	3750×1850×2180	air-cooled data
CM90PVF	1	145	5.81-14.52	205-513	90	125	73	2160	2500×1400×1580	water-cooled data
CM90PVF	1.25	181	4.92-12.30	174-434	90	125	73	2160	2500×1400×1580	water-cooled data
CM110PVF	0.8	116	7.76-19.40	274-685	110	150	78	4000	3750×1850×2180	air-cooled data
CM110PVF	1	145	6.76-16.90	239-597	110	150	78	2270	2500×1400×1580	water-cooled data
CM110PVF	1.25	181	6.04-15.10	213-533	110	150	78	2270	2500×1400×1580	water-cooled data
CM132PVF	0.8	116	8.88-22.21	314-784	132	180	78	4150	3750×1850×2180	air-cooled data
CM132PVF	1	145	8.15-20.38	288-720	132	180	78	2350	2500×1400×1580	water-cooled data
CM132PVF	1.25	181	7.31-18.29	258-646	132	180	78	2350	2500×1400×1580	water-cooled data
CM160PVF	0.8	116	11.54-28.85	407-1019	160	220	78	5300	4300×2000×2500	air-cooled data
CM160PVF	1	145	9.81-24.52	346-866	160	220	78	3720	3100×1700×2090	water-cooled data
CM160PVF	1.25	181	8.87-22.17	313-783	160	220	78	3720	3100×1700×2090	water-cooled data
CM200PV	0.8	116	14.65-36.63	517-1293	200	270	78	3750	3100×1700×2090	water-cooled model
CM200PV	1	145	13.10-32.70	463-1155	200	270	78	3750	3100×1700×2090	water-cooled model
CM200PV	1.25	181	11.09-27.72	392-979	200	270	78	3750	3100×1700×2090	water-cooled model
CM250PV	0.8	116	17.15-42.88	606-1514	250	340	78	3900	3100×1700×2090	water-cooled model
CM250PV	1	145	15.60-39.00	551-1377	250	340	78	3900	3100×1700×2090	water-cooled model
CM250PV	1.25	181	13.87-34.64	490-1223	250	340	78	3900	3100×1700×2090	water-cooled model
CM320PV	0.8	116	23.64-59.10	835-2087	320	430	80	4850	3600×2800×2000	water-cooled model
CM320PV	1	145	21.40-53.50	756-1889	320	430	80	4850	3600×2800×2000	water-cooled model
CM320PV	1.25	181	19.30-48.25	681-1704	320	430	80	4850	3600×2800×2000	water-cooled model

Catalogue technical table crop for Variable Frequency Water-Lubricated Oil-Free Screw Air Compressor — High-resolution crop from catalogue page 12; use the HTML table for accessibility and the crop for visual cross-check.

How to read the table: select a pressure row first, then compare FAD, motor power, cooling form, noise, weight and outline dimensions. FAD is catalogue data; verify reference inlet conditions and permitted tolerances in the quotation.

What this product family is

This family is intended for installations where compressed-air demand changes over time. The catalogue expresses FAD as a range for each pressure row, so the range—not merely the motor nameplate—is the starting point for a selection discussion. A variable-frequency package should be selected against a measured or defensibly estimated demand profile, the minimum stable operating point, required header pressure and the pressure loss through dryers, filters, receivers and the PSA or VPSA process. The catalogue does not state a universal turndown guarantee, so the lower end of every printed range should be treated as model-specific source data rather than a promise that every installation can operate continuously at that value.

The intended application scope includes PSA/VPSA oxygen-generation feed air, pharmaceutical and food process air, electronics production, laboratories, and other duties where oil-free air and demand-following control are important. The compressor is a source of compressed air. For a medical oxygen plant it normally sits upstream of the oxygen generator, air treatment and buffer vessels. It is not a compressor for oxygen gas and it should never be connected to oxygen-enriched gas unless a separate design explicitly approves that service.

Model range represented in the catalogue

CM08PVFCM11PVFCM15PVFCM18PVFCM22PVFCM30PVFCM37PVFCM45PVFCM55PVFCM75PVFCM90PVFCM110PVFCM132PVFCM160PVFCM200PVCM250PVCM320PV

Cutaway view of an enclosed water-lubricated oil-free compressor package — Catalogue-derived component view used to explain package integration; final component selection is order-specific.

Engineering selection

Turn an air requirement into a defensible compressor selection

1. Define the duty point

State normal, minimum and peak FAD; required pressure at the process inlet; operating hours; start-stop limitations; and whether a single unit, duty/standby pair or sequenced station is required. Use actual plant measurements when replacing an existing machine. Do not add an arbitrary safety factor without documenting why it is needed.

2. Build the pressure budget

The model table gives compressor working pressure. The process receives less after pressure losses through the aftercooler, separator, dryers, filters, check valves, receiver, distribution header and oxygen-generation skid. Calculate the worst credible pressure loss at peak flow and dirty-filter condition.

3. Define air quality

Write the required ISO 8573-1 class notation for particles, water and oil at the stated measurement point. The catalogue presents an oil-free/Class 0 marketing claim, but a purchase specification should request the exact class triplet, test method, sampling point and evidence for the offered configuration.

Integration into a PSA or VPSA medical oxygen system

In a pressure-swing adsorption system, clean compressed air is the feedstock from which nitrogen is preferentially adsorbed. Compressor selection therefore affects oxygen-plant throughput, cycle stability, adsorbent protection and total energy use. The site must coordinate compressor FAD and pressure with the oxygen generator's validated inlet window rather than choosing both packages independently. A feed-air receiver can reduce short-cycle demand, while correctly sized filtration and drainage protect the downstream process from condensate and particulates.

The health-facility oxygen system is wider than the compressor. It may include inlet filtration, air treatment, oxygen generator, analyzer, product receiver, booster or filling system where permitted, alarms, reserve supply, pipeline distribution and documented commissioning. The compressor page therefore does not claim that the machine alone creates medical oxygen or that it is a certified medical device. Local regulations, pharmacopoeial requirements, risk management and the oxygen-system supplier's validation control the final project.

For medical-air service, the required quality and monitoring regime can be different from feed air for an oxygen generator. The buyer should identify whether the air will contact patients, drive instruments, feed a PSA plant, or serve a general industrial utility. Never merge these duties under a generic “medical compressor” label without a piping and hazard review.

Safety boundary: this catalogue describes air compressors. Oxygen-enriched gas is highly oxidizing. Do not use these machines to compress oxygen unless the quotation, materials, cleaning process, lubrication concept and risk assessment explicitly state oxygen service.

Water-cooled and air-cooled compressor flow diagrams — Catalogue flow diagrams retained as engineering context. Verify the offered cooling arrangement on the approved P&ID.

Cooling, water and site utilities

The catalogue distinguishes air-cooled values with an “F” suffix and orange data in the standard-pressure tables, while models without “F” are described as water-cooled. This distinction changes package dimensions and weight, and it changes the buyer's utility checklist. For air cooling, confirm maximum ambient temperature, altitude, ventilation path, recirculation risk, inlet cleanliness and the heat rejected to the compressor room. For water cooling, specify inlet temperature, allowable temperature rise, water quality, pressure, flow, fouling allowance, corrosion control and whether the circuit is once-through, tower water or closed loop.

Water-lubricated compression also requires attention to water quality and separator performance. The supplied catalogue illustrates a lubricating-water filtration system, water cooler and water/air separation barrel. The order specification should identify consumables, drainage, water make-up, winterization and the consequences of a utility-water interruption. These details are not fully defined in the catalogue and remain engineering-review items.

Electrical data must include site voltage, phase, frequency, permitted voltage variation, earthing, short-circuit level, motor starting constraints, VFD harmonic requirements where relevant, and the control interface. Catalogue kW and HP values are model-table fields, not a complete electrical schedule.

Installation and commissioning workflow

Approve the model, pressure row, cooling form and outline dimensions against the latest commercial quotation and general arrangement drawing.
Check foundation loading, lifting points, access clearances, door removal space, ventilation and maintenance routes. Catalogue weight is useful for planning but the final shipping and operating weight should be confirmed.
Clean and pressure-test downstream piping independently. Install flexible connectors only where permitted and support piping so nozzle loads are not transferred to the package.
Install the air receiver, drains, relief devices, isolation valves and non-return valves in the correct order. Never isolate a pressure vessel from its relief device.
Confirm rotation, oil-free water circuit readiness, cooling-water flow or ventilation, electrical protection, emergency stop, alarm contacts and remote permissives.
Commission against a documented test sheet: inlet conditions, discharge pressure, FAD or process throughput, temperatures, vibration, noise, dew point, differential pressures, drain operation and oxygen-generator response.
Record baseline readings for later maintenance. Training should cover normal shutdown, emergency response, lockout/tagout, water-system care, filter replacement and alarm escalation.

Commissioning should not be reduced to “machine starts and makes pressure.” A medical oxygen project needs a traceable handover showing that the compressor, treatment train and oxygen system operate together through normal, peak, standby and fault scenarios.

Maintenance and troubleshooting

Use the supplied operation manual and serial-number-specific parts list. A useful maintenance plan separates daily condition checks from calendar tasks, running-hour tasks and condition-based interventions. Daily checks can include pressure, temperature, drain function, abnormal sound, water level or quality indicators, cooling performance and alarm history. Planned work may include intake and process filtration, cooling surfaces, water filtration, separator inspection, electrical connections, safety devices and calibration of critical instruments.

Low pressure at the process can result from excessive demand, a dirty intake, downstream pressure loss, a control set point, a leaking valve or a compressor problem. High temperature can result from ventilation recirculation, inadequate cooling water, fouled heat exchange surfaces, incorrect water flow or high ambient conditions. Frequent starts often indicate insufficient receiver volume, an unsuitable control band, leakage or a machine that is oversized for the minimum demand. Diagnose the system before replacing major parts.

For oxygen-generation duty, trend oxygen purity and production together with compressor pressure and FAD. A falling oxygen result may come from air supply, air treatment, valve timing, adsorbent condition, analyzer issues or downstream leakage. The compressor should not be blamed—or cleared—without correlated data.

RFQ and drawing-approval checklist

Application and whether air feeds PSA/VPSA, medical air, PET blowing or another process
Required FAD at normal, minimum and peak demand
Required process pressure and estimated downstream pressure loss
Site altitude, ambient temperature and humidity
Air-cooled or water-cooled preference and utility details
Power supply, voltage, phase, frequency and controls interface
ISO 8573-1 particle/water/oil class target and sampling point
Required redundancy, receiver volume and operating hours
Local pressure-equipment, electrical and machinery compliance requirements
Indoor/outdoor installation and enclosure/IP expectations
Noise limit and measurement condition
Languages, documents, certificates and inspection plan required with the order

Final manufacture and shipment must follow the approved quotation, model schedule, wiring diagram, P&ID and general arrangement drawing. The website table is a selection aid and evidence transcription; it does not replace the signed project documents.

Frequently asked questions

Is this an oxygen compressor?

No. The catalogue supports oil-free compressed-air packages. In a medical oxygen plant the machine normally supplies air to the PSA/VPSA generator. Oxygen-gas compression requires a separate oxygen-service design.

Can the website table be used as the purchase specification?

Use it for shortlist and RFQ preparation. The approved quotation and drawing must resolve cooling form, voltage, options, exact interfaces, ambiguous merged cells and project compliance.

What does the F suffix mean?

The catalogue footnote states that CM-F indicates an air-cooled model and orange data are air-cooled parameters. Models without F are water-cooled.

Does oil-free automatically mean medical grade?

No. Oil-free compression addresses one contamination route. Medical oxygen or medical air quality depends on the complete system, treatment, monitoring, commissioning and applicable regulation.

How should variable and fixed speed be compared?

Compare the measured demand profile, minimum demand, pressure stability, control method, sequencing plan, lifecycle energy and maintenance—not only motor power or maximum FAD.