Compressed air that keeps working at sea.
Marine screw compressors, starting air packages and industrial compressed-air systems engineered for salt fog, vibration and continuous duty — certified for the world's classification societies.
Designed, built and certified in-house
R&D
In-house compressor-element and system design. Holds 12 patents, including a design patent for the marine water-cooled screw air compressor (No. 8074130), and operates a factory energy-efficiency laboratory verified to GB 19153-2019 Grade 1.
Manufacturing & QA
The Jiading manufacturing and R&D base handles element assembly and full-unit testing. Every unit is performance-, leak- and pressure-tested before dispatch, and ships with material certificates, test reports and class survey documents; third-party witnessed testing can be arranged.
Systems & Approvals
ISO 9001 / ISO 14001 / ISO 45001 certified, with CCS type approval, BV Mode II recognition, ABS approval, RS type approval and ECM European type approval. A recognised National High-Tech Enterprise (Certificate No. GR202431000556).
One manufacturer, every air duty
From 0.7 to 40 m³/min and 8 to 15 bar in the marine screw range, plus starting air and complete treatment packages — built in our own 40,000 m² Shanghai manufacturing base.
Marine Screw Compressors
Water- and air-cooled GRF packages for nitrogen generation, service and instrument air, with class-certified pressure parts.
View marine range →
Industrial Compressors
SH series: PM variable-frequency and fixed-speed screw compressors, single- and two-stage, 4-in-1 combined, laser-cutting and low-pressure lines, 7.5–450 kW.
View industrial range →
Air Treatment & Skid Packages
Dryers, filters, receivers and complete instrument-air skids with P&ID and DCS integration for offshore EPCs.
View treatment & packages →Every air duty on a vessel, covered
Starting air, service air, instrument air, nitrogen feed, scrubbers, FSRU and offshore platforms — each with a proven reference.
Engine Starting
- Up to 30 bar starting air sets
- WFC-90 + receivers
- FSRU & cargo vessel references
Service & Deck Air
- 7–8 bar compact units
- Retrofit-friendly footprints
- 20+ MSC vessel retrofits
Instrument & N₂ Feed
- < 3 ppm oil carry-over
- Desiccant dryer skids
- Chemical tanker & FSRU fleets
Offshore & FPSO
- 690 V / 316L / 30-year design
- DCS + RS-485 integration
- PETRONAS & CNOOC references
3,000+ marine installations worldwide
PETRONAS Sepat FPSO
Utility & instrument air package, 690 V, 30-year design life, three units.
Wison F462 FSRU
Two-stage water-cooled GRF-300DSCW plus starting and service air on one vessel.
MSC Container Fleet
30 sets across 20+ vessels, delivered inside dry-dock windows.
A Shanghai compressor maker since 1999
Shanghai Shengyi Compressor Co., Ltd. (brand DLOL) develops, manufactures and services screw air compressors and air purification equipment, exporting to Asia, Europe, the Americas, Australia, Africa and the Middle East.
