Shanghai Gairs Machinery
- Location
- Songjiang, Shanghai
- Core range on this page
- Water-lubricated oil-free single-screw compressors
- Existing product routes
- OGWBY / OGWY · OGWYD · OGWYE
A single-screw specialist with three pressure routes
Shanghai Gairs Machinery develops and manufactures single-screw air compressors. Its water-lubricated range separates ordinary-pressure, low-pressure and medium-pressure variable-speed equipment. Choose from the process pressure and demand, then confirm the model, cooling and utility arrangement.
Traceable technical background
The national standards information platform names Shanghai Gairs Machinery as a drafting organisation for JB/T 11882-2025, the water-injected single-screw compressor industry standard, implemented on 1 November 2025.
Standard drafting is technical involvement. For procurement, request the offered machine's applicable performance and acceptance documents; it is a separate question from certification of a model or installation.
Start with pressure at the process
Keep the required flow with its working pressure. The three routes below use different catalogue records; a maximum flow from one pressure does not size a machine at another.
- 0.7 / 0.85 / 1.0 MPa
Ordinary-pressure variable speed
Compare delivery across the pressure rows for the named OGWY model. Include the required speed-control and cooling version.
Inspect the 22 kW example → - 0.3 / 0.4 MPa
Low-pressure process air
Use the dedicated OGWYD records. Compare demand, distribution losses and air-cooled versus water-cooled installation conditions.
Inspect the 37 kW example → - 3.0 / 4.0 MPa
Medium-pressure supply
Use the OGWYE pressure/model pair and installed-power figure. Include pressure ratings of the complete downstream supply.
Compare the two 6.0 m³/min examples →
Ordinary-pressure route
Same motor, different pressure-matched delivery
OGWBY family / OGWY model table
The product heading uses OGWBY; the original parameter table uses OGWY codes. For OGWY22F/S, the table lists a 22 kW motor, with delivery changing across its three pressure rows.
The F suffix identifies air cooling and S water cooling. The table also distinguishes conventional variable-frequency and permanent-magnet variable-frequency starting designations. Ask for the full current code and drive sheet.
Review the ordinary-pressure family →| Pressure | Air delivery |
|---|---|
| 0.7 MPa | 1.5–3.7 m³/min |
| 0.85 MPa | 1.4–3.4 m³/min |
| 1.0 MPa | 1.2–3.0 m³/min |
For varying demand, compare the proposed control range, minimum stable delivery and package input at the required pressure. Confirm catalogue flow reference conditions and test basis before comparing another supplier's FAD figure.
Low-pressure route
Low-pressure capacity has its own cooling conditions
OGWY37FD air-cooled example
- Motor power
- 37 kW
- At 0.3 MPa
- 10.0 m³/min catalogue delivery
- At 0.4 MPa
- 8.5 m³/min catalogue delivery
- Catalogue supply / drive
- 380 V, 50 Hz · Coupling · Variable-frequency starting
Air cooling or water cooling?
Air-cooled catalogue reference
Air-supply temperature is listed as no more than ambient temperature +15°C. Specify ventilation and actual site ambient conditions.
Water-cooled catalogue reference
The reference is cooling-water inlet temperature +10°C. Include available cooling-water conditions and the manufacturer's required utility scope.
These are relative air-supply temperature references. They are not pressure-dew-point specifications, and do not establish dry air at the process.
Medium-pressure route
Read installed power from the model record
Two air-cooled catalogue examples
| Model / duty | Installed power |
|---|---|
| OGWYE55F-6.0/30 6.0 m³/min at 3.0 MPa | 59 kW |
| OGWYE75F-6.0/40 6.0 m³/min at 4.0 MPa | 75 kW |
The “55” in the first model name is not its listed installed-power value. Keep the complete code, pressure, delivery and power basis in the quotation.
Review medium-pressure model information →Define the complete pressure-rated supply
Include receiver, treatment, connections and downstream components in the order boundary. Request their applicable pressure ratings and inspection documents, plus the selected machine's performance and operating instructions.
Separate the water circuit from air-quality acceptance
Water lubrication is part of the compressor selection. The required quality at the process is a separate system-level requirement. Put both into the enquiry.
Lubricating water
Ask for water-quality limits, treatment and make-up requirements, circulation, drainage and service intervals. Name which equipment and consumables are included.
Cooling utilities
Confirm F or S construction. For air cooling, specify ventilation and ambient conditions; for water cooling, specify inlet conditions and the required cooling arrangement.
Delivered air
State particle, oil and moisture limits at the point of use. Agree the dryer/filter/receiver scope and the sampling location, operating conditions and acceptance records.
Prepare an enquiry that can be compared
Process demand
Pressure at the use point, simultaneous/peak delivery, operating schedule and distribution constraints. Name the ordinary-, low- or medium-pressure route.
Utilities and quality
Electricity, ambient and cooling-water availability; make-up-water conditions; required air-quality limits and treatment/acceptance scope.
Proposed configuration
Full model/control/cooling code, pressure-matched flow, measurement basis, package input, control limits, included water equipment and installation/service documents.
Questions before selecting a Gairs compressor
Can OGWY22F/S deliver 3.7 m³/min at 1.0 MPa?
The reviewed table pairs 3.7 m³/min maximum with 0.7 MPa. At 1.0 MPa it lists 1.2–3.0 m³/min. Keep the pressure and delivery from the same row and confirm the offered configuration's performance basis.
Does the 30 L water figure size my cooling supply?
No. It is listed as lubricating-water volume for OGWY22F/S. Request cooling-water, treatment, make-up and circulation requirements separately for the selected machine.
Is OGWYE55F-6.0/30 a 55 kW package?
The original table lists 59 kW installed power. Request actual package input at your duty; neither a model-name number nor installed power alone establishes measured operating consumption.
Does standard drafting replace a model acceptance report?
No. Gairs' participation in JB/T 11882-2025 is company technical background. Agree applicable model performance, air-quality testing and order documents separately.