Is water-lubricated the same as dry oil-free screw?
No. Gairs publishes water-injected single-screw. Dry twin-screw is a different OEM conversation.
Shanghai (Songjiang)
Gairs Songjiang: water-lubricated oil-free single-screw
Songjiang specialist. Public OGW lines are water-injected single-screw — not a dry twin-screw badge.
Duty sheet
Songjiang oil-free sheet
- OGWBY VSD vs OGWYD low-pressure vs OGWYE medium-pressure
- Outlet pressure band (low vs medium) and FAD
- ISO 8573-1 class at package outlet
- RO water / stainless air-end questions if the duty needs them
- FOB Shanghai
Shanghai
Songjiang single-screw oil-free shop
Gairs (Shanghai Gairs Machinery) is a Songjiang OEM for water-lubricated oil-free single-screw compressors. The English desk publishes three official OGW rows: OGWBY VSD, OGWYD low-pressure and OGWYE medium-pressure. Those are different pressure bands. Treating them as one “oil-free compressor” block is how a duty sheet dies.
Water injection into a single-screw air-end is not a silent piston box and not a dry twin-screw. Stainless pipework and RO water questions belong on oil-free RFQs that actually use this architecture. Two-stage water-lubricated frames exist on the public tree; they are not an extra SKU here.
TÜV is listed from the public-page check. Class 0 is not invented from a brochure headline. The plant remains the seller.
Published series
Gairs OGW rows on this desk
Shortlist across this works, then one English RFQ. Quotes come from the plant.
| Model | Type | Power | Pressure | FAD | Air quality | Plant | |
|---|---|---|---|---|---|---|---|
| GAIRS-OGWBYOGWBY water-lubricated oil-free single-screw VSD | Oil-free | on RFQ | on RFQ bar(g) | on RFQ | oil-free | Gairs | RFQ |
| GAIRS-OGWYDOGWYD low-pressure water-lubricated oil-free | Oil-free | on RFQ | low pressure bar(g) | on RFQ | oil-free | Gairs | RFQ |
| GAIRS-OGWYEOGWYE medium-pressure water-lubricated oil-free | Oil-free | on RFQ | medium pressure bar(g) | on RFQ | oil-free | Gairs | RFQ |
Buyer notes
Water-lubricated vs dry screw
Do you list Class 0 because the English marketing site says it?
TÜV is on the public Chinese file. Class 0 is not printed here unless the works sends the paper for that package.
Can this factory quote a diesel portable 18 bar for mining?
That is not the published series. This page is water-lubricated oil-free single-screw from Songjiang.
Shanghai
Other works in this cluster
Shanghai
Hanbell
Screw air-ends · Refrigeration screw
Shanghai
SCR
PM VSD screw · Oil-free screw/scroll
Shanghai
Fusheng
Oil-injected/oil-free screw · Piston
Shanghai
Success Engine
Oil-injected screw · Oil-free
Gairs: Songjiang specialist. Public OGW lines are water-injected single-screw — not a dry twin-screw badge.
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