LGJ-4.0/35TS (PM)
3.5 MPa · 4.0 Nm³/min
45 kW installed / 41 kW shaft
620 rpm · 1800 kg
15 t/h circulating water
2400 × 1350 × 1850 mm
Foshan Nanhai
DMG Foshan: PET compression paths, cooling and installation choices
Separate water-lubricated Dolphin, four-stage Eagle and Bull pressure variants before specifying a blowing-line system.
GUANGDONG DMG · FOSHAN NANHAI
PET air selection starts with the compression path
DMG’s April 2025 bilingual catalogue identifies the company as 广东大满贯压缩机有限公司 / Guangdong DMG Compressor Co., Ltd. Its company page locates the business in Shishan, Nanhai District, Foshan, and dates establishment to 2015. It presents research, manufacturing and sales of PET high-pressure systems alongside lower-pressure screw and laser-cutting equipment.
The independent PTXPO 2025 event directory lists Guangdong DMG Compressor at booth 1627. This records exhibition participation; it is not product approval or an audited assessment of manufacturing capacity.
DOLPHIN · WATER-LUBRICATED SCREW + PISTON BOOSTER
Separate circulating water from water consumption
DMG describes water lubrication, cooling and sealing in the screw stage, followed by an oil-free piston booster. Its stainless-component and oil-free statements concern the machine presentation; process-air purity and the complete treatment system need their own acceptance requirements.
OGV-6.0/40PM · published point
- Pressure / flow
- 4.0 MPa · 6.0 Nm³/min
- Installed / shaft
- 67 kW / 60 kW
- Speed / mass
- 530 rpm · 2500 kg
- Enclosure
- 2800 × 1500 × 1500 mm
20 t/h is the circulating-water entry
It does not establish fresh-water consumption, evaporation loss or cooling-tower sizing by itself. Agree inlet temperature, water quality, pressure, heat rejection and the supply/return arrangement. Ask for separate lubrication-water and external cooling circuit diagrams.
The same row lists DN40 high-pressure exhaust and 1½ inch in a separate inlet/outlet diameter column. Identify each connection on the selected package drawing before ordering site piping.
For comparison, the separate OGW-30/40PM row lists 30 Nm³/min at 4.0 MPa, 310/279 kW installed/shaft, 9000 kg and 125 t/h circulating water. This larger duty is a different machine; it is not the OGV-6 unit’s operating range.
Dolphin model points and utility details →EAGLE · FOUR-STAGE SCREW / PISTON
The same air duty can require a different foundation
The Eagle technical heading calls this a four-stage oil-free screw/piston system. Its detail text discusses a two-stage screw front end and water cooling of lubrication oil, cylinders and packing. Obtain the actual stage and circuit diagrams: an oil-free air-side claim does not mean every mechanical circuit contains no oil.
The 16 Nm³/min entries below share pressure and two power figures, while speed, mass and package height differ. Preserve the complete model designation for the layout and quotation.
| Designation | Speed / mass | Dimensions | Shared table entries |
|---|---|---|---|
| LGV2-16/40PM | 520 rpm 4500 kg | 3820 × 2050 × 1770 mm | 145 kW installed 131 kW shaft 50 t/h water · DN50 exhaust |
| LGW2-16/40PM | 350 rpm 6000 kg | 3820 × 2050 × 2100 mm | 145 kW installed 131 kW shaft 50 t/h water · DN50 exhaust |
The table uses Nm³/min. Establish its normal-volume reference and compare it with the blowing-machine consumption basis. Installed and shaft power are separate ratings, neither a measured package-input guarantee nor a production-cycle energy bill.
Eagle paired duties, dimensions and circuit questions →BULL · MULTISTAGE / DOUBLE-ACTING PISTON
35TS and 40 identify different pressure selections
DMG describes double-acting piston boosting, stainless air/water pipework, skid installation and a common fault-diagnostic panel. The quotation should specify the actual variable-frequency/permanent-magnet motor arrangement and control/protection interfaces.
Select pressure at the blow-moulding machine, allow for system losses and define receiver/recovery operation. Do not combine one row’s flow with another row’s discharge pressure.
LGV-8.0/40 PM
4.0 MPa · 8.0 Nm³/min
85 kW installed / 77 kW shaft
580 rpm · 2438 kg
25 t/h circulating water
2800 × 1500 × 1500 mm
The Bull table’s LGV-6.0/40 row lists 2480 kg, while the 8.0 row lists 2438 kg. These source figures are retained without an invented correction; obtain current lifting and foundation drawings. A skid still needs service access, utility connections and an agreed installation plan.
Bull pressure-specific rows and installation scope →BLOWING LINE · AIR QUALITY · DELIVERY SCOPE
Turn the catalogue into a usable site specification
Supply a production-cycle duty
Blowing-machine demand and its volume reference, bottle format, base/peak consumption, cycle, pressure at the use point, receiver volume and recovery arrangement. Obtain the actual paired pressure-flow curve, package input and part-load/control data.
Draw the supply boundary
Compression stages, air-side and mechanical lubrication paths, cooling-water conditions, heat rejection, drains and electrical/control interfaces. Include receiver and pressure-rated piping, dryers, filters, safety protection and access for valves, rings and packing.
Define air-quality acceptance
DMG publishes a TÜV Rheinland conformity-certificate image and CE/ISO statements. Obtain readable current documents with model scope, test conditions and issuer verification. Oil-free compression alone does not establish complete particle/moisture quality, food-process acceptance or breathing-air approval. Agree treatment, sampling point and destination requirements.
Agree commissioning and ownership
The service page describes component and complete-machine inspection, commissioning and training, with a one-year normal-use warranty statement followed by paid service. Its pandemic-era travel wording is not a current overseas-engineer guarantee. Put warranty start/exclusions, site preparation, engineer availability/travel, remote support, manuals, wear parts and response arrangements into the order.
Questions before selecting a DMG PET system
Can I compare Nm³/min directly with any m³/min air-demand figure?
Agree normal-volume reference temperature, pressure and humidity, plus the blowing-machine consumption basis. Convert only after both references are known; the printed units alone do not establish equivalence.
Does an oil-free heading mean there is no lubricating oil anywhere?
No. Air-side compression and mechanical lubrication have different boundaries. Eagle’s own text discusses lubrication-oil cooling. Obtain the offered machine’s circuit drawings and model-specific purity evidence.
Will the manufacturer automatically send an engineer overseas?
Agree actual destination coverage, travel, availability, costs and remote support in the quotation. Older service-page wording is not an unconditional current commitment.
Specify the blowing-line air system
Send Dolphin, Eagle or Bull selection, pressure, flow reference, production cycle, cooling utilities and process-air acceptance targets.
Prepare a DMG enquirySpecification pages
Specification pages for DMG product types
| Duty | Write on the RFQ |
|---|---|
| 30 bar oil-free compressor | Specify whether 30 bar is gauge or absolute pressure, where it is required and how much air must be supplied at that point. A 30 bar working duty does not, by itself, identify a compressor architecture, motor size or air-quality class. |
| 40 bar PET compressor | PET blowing at 40 bar(g) is a high-pressure oil-free duty. Cavities, bottle volume and recovery pressure size the skid — not the word “PET compressor”. |
| Compressor for PET bottle blowing | Bottle blowing is a high-pressure oil-free process. The blower OEM’s pressure and the cavity count size the compressor, not the word PET. |
Product information
Information reviewed 2026-10-08. Specifications apply only to the models and conditions stated.
DMG: Separate water-lubricated Dolphin, four-stage Eagle and Bull pressure variants before specifying a blowing-line system.
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