| Product Model | DBOIL-4 |
| Kinematic viscosity (40ºC) (mm²/S) | - |
| Kinematic viscosity (mm²/S), 100℃ | - |
| Viscosity Index | - |
| Flow Point（℃） | - |
| Flash Point (℃) | - |
A: Dunham-Bush DBOIL-4 is a mineral refrigeration oil for the R22 system of Dunham-Bush fully enclosed screw compressors.
A: It corresponds to refrigerant R22.
A: Yes. DBOIL-4 is a mineral refrigeration oil.
A: DBOIL-4 can be replaced by Japan SunISO 4GS refrigeration oil.
A: It is confirmed per order against the pack size, the quantity and the destination port, so a trial quantity and a full container load are both workable.
A: Delivery is on any Incoterms 2020 term, and EXW, FOB, CFR and CIF are all available. Payment is on any commonly used method, including T/T, L/C and PayPal.
A: Both routes are available — the China-made pack and the original branded pack — and the quotation states which one it covers.
A: We manufacture refrigeration and compressor oils at our own blending plant in Foshan, Guangdong, which runs at 6,000 tonnes a year, and we match a grade to the compressor model and the refrigerant you are running.
A: A technical data sheet and safety data sheet come with the quotation, and the export documents — CE, Certificate of Origin, MSDS and transport identification reports — are issued with the shipment.
A: Send the compressor model, the refrigerant, the grade shown on the nameplate and the quantity you need. We check the grade against the compressor documentation and the refrigerant you are running, and confirm it with the quotation.
This oil is manufactured and supplied by Guangzhou Qishanr Technologies Co., Ltd., trading as the brand QISHANR. The company is based in Foshan, Guangdong, adjacent to Guangzhou Port, and has been producing lubricants for more than 10 years from its own blending plant. That plant runs at an annual capacity of 6,000 tonnes, which is what allows us to hold stock on the grades we list and quote firm lead times rather than promising on behalf of a third party.
Refrigeration oils are the core of the business, but they are not the whole plant. The same lines produce general industrial lubricants, so a mixed enquiry that covers both refrigeration oils and ordinary industrial grades can be quoted, packed and shipped together instead of being split across suppliers.
This is not the full range. Specialised ester base oils and lubricant additives are produced in-house as well, which is the reason the synthetic ester grades can be specified to a target rather than bought off a shelf. If the grade you need is not listed above, send the specification or the product you are replacing and we will confirm whether we produce it.
Long-term partners get pricing that reflects a stable manufacturing base rather than a trading margin, and the same technical contact stays with the account from grade selection through to repeat orders.
DBOIL-4 is quoted on the pack size and the destination port rather than on a list price. Send the compressor model, the refrigerant, the grade shown on the nameplate and the quantity you need. We will confirm the grade against the compressor documentation and the refrigerant you are running, and come back with pricing, pack size and lead time. A technical data sheet and safety data sheet come with the quotation, and the China-made pack and the original branded pack can be quoted side by side so the comparison is on landed cost.
Request a QuoteOriginal publication. The product data, specifications and compatibility charts published on this page for Dunham-Bush DBOIL-4 were originally published by QishanrLubricants at qishanrlubricants.com. © 2026 QishanrLubricants. All rights reserved.
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