Daphne FV50S (the manufacturer’s full name is DAPHNE HERMETIC OIL FV50S) is a polyvinyl ether refrigeration and air-conditioning lubricant supplied by Idemitsu Kosan Co., Ltd. The manufacturer prints a measured viscosity of 50.69 cSt at 40 °C for this grade, which places it at ISO VG 46, and its safety data sheet for the product also gives the pour point (-37.5 °C), the flash point (206 °C, Cleveland open cup) and the density (0.9315 g/cm³ (15 °C)). The oil is used with HFC refrigerants such as R-134a, R-404A, R-407C and R-410A in refrigeration and air-conditioning compressors that specify a PVE lubricant. The manufacturer identifies the base fluid as a polyvinyl ether (PVE) synthetic, and the manufacturer states the product is intended as a lubricant for refrigeration and air-conditioning compressors running HFC refrigerants. The published physical data comes from the manufacturer’s own safety data sheet for the product, which is the document this page quotes against.
One figure is worth stating plainly, because it sits on a boundary. The manufacturer measures this grade at 50.69 cSt at 40 °C, and the upper edge of the ISO 3448 viscosity band called ISO VG 46 is 50.6 cSt. The measured value is therefore 0.09 cSt above the band edge, which is inside the tolerance of a routine viscosity measurement, so the grade is sold and specified as ISO VG 46. We give both numbers here rather than round one of them away, so that the buyer can check them against the manufacturer’s own sheet.
We manufacture and supply refrigeration and compressor oils at our own blending plant in Foshan, China, and we supply a synthetic refrigeration oil at the nearest listed grade as Qishanr QSL-46H, our own synthetic refrigeration oil at the nearest listed grade. There is no fixed minimum order — it is confirmed per order, because a single can and a full container load are both workable and the figure moves with the pack size, the quantity and the destination. Delivery is on any Incoterms 2020 term — EXW, FOB, CFR, CIF, DDP and every other rule — and payment is on any commonly used method, including T/T, L/C and PayPal. Send the compressor model, the refrigerant and the oil type on the nameplate and we will confirm what we can supply before quoting. QISHANR is a refrigeration oil manufacturer and wholesale supplier, and the grades we list are supplied in bulk to distributors, HVACR service companies and compressor OEMs worldwide.
Daphne FV50S is supplied on published terms: the specification, the price terms, the payment terms and the documents are the same for every buyer, and they can be quoted without a site visit. The minimum order is deliberately left open, because it is judged case by case: the grade, the quantity, the pack size, the shipping terms and the container load all move it, so a single can and a full container load are both workable and neither is treated as the normal case. Send us the quantity, the destination port and whether your own brand goes on the container, and those three turn the table below into a firm quotation. Documents and lead time work the same way on every order: the technical data sheet and safety data sheet come with the quotation, and the certificate of analysis for the delivered batch comes with the shipment. This grade is supplied wholesale and in bulk — to distributors, HVACR service companies, compressor OEMs and private-label buyers — as well as in single packs and sample quantities.
| Item | Terms for Daphne FV50S |
|---|---|
| Minimum order quantity | Not a fixed figure — confirmed per order, because it is judged case by case: the grade, the pack size, the quantity, the shipping terms and the container load all move it, so a single can and a full container load are both workable |
| Payment terms | Any commonly used payment method — T/T, L/C, PayPal and every other option — confirmed with the order |
| Price terms | Any Incoterms 2020 term — EXW, FOB, CFR, CIF, DDP and every other rule — quoted against your destination port |
| Supply ability | 1,000 pieces per year on this grade, at our blending plant in Foshan — this is the figure for our equivalent, not the annual capacity of the plant |
| Origin | The original Idemitsu Daphne product, or an equivalent manufactured at our own plant in Foshan, China |
| Supply options | The original Idemitsu Daphne FV50S oil, or Qishanr QSL-46H (our own synthetic refrigeration oil at the nearest listed grade), manufactured at our blending plant in Foshan, China |
| Who buys this grade | Distributors and resellers who stock refrigeration oil, HVACR and refrigeration service companies, compressor OEMs filling new equipment, and buyers who need private-label or own-brand packing. Wholesale and bulk orders are the norm; trial and sample quantities are also supplied. |
| Grade confirmation | Send the compressor model, the refrigerant and the oil type on the nameplate. The manufacturer identifies this product as a polyvinyl ether lubricant for HFC systems, and the measured viscosity at 40 °C is 50.69 cSt (ISO VG 46), so the match is made on the lubricant family, the viscosity band and the refrigerant together. |
| Measured viscosity | The manufacturer prints 50.69 cSt at 40 °C for this grade. The figures quoted on this page are the typical values printed by the manufacturer in its own safety data sheet for this product; the manufacturer describes them as guidance for safe handling and states they are not to be treated as a quality specification. We reproduce them as a reference point and confirm the current data sheet with every quotation. |
| Pour point and flash point | Pour point -37.5 °C and flash point 206 °C (Cleveland open cup), as published by the manufacturer. The pour point is the low-temperature limit at which the oil still flows, and it is the figure that matters first when a system runs at a low evaporating temperature; the flash point is reported under an open-cup method, and it is not the same number as a closed-cup figure would be. |
| Base fluid | PVE (polyvinyl ether) is a synthetic refrigeration lubricant used with HFC refrigerants such as R-134a, R-404A, R-407C and R-410A. It is a different chemistry from POE (polyol ester): both are synthetic, but they are not freely interchangeable in a system, so a top-up is made with the same lubricant family the compressor was charged with. |
| Documents issued with the order | Technical data sheet, safety data sheet, and a certificate of analysis for the delivered batch |
| Handling and storage | Store sealed, away from direct sunlight, and keep the container closed between top-ups. PVE lubricants absorb moisture from the air, so a container should be resealed immediately after use and the oil should not be decanted into an unlined steel drum where it can pick up rust and moisture. A top-up is made with the same lubricant family the compressor was charged with, not with whatever is on the shelf. |
Supply ability is stated for this grade rather than for the plant as a whole. It is not the annual capacity of the blending plant.
The manufacturer publishes this data for the product itself rather than for a compressor series, so the final word on fitness is the compressor maker’s own charge instruction.
A refrigeration lubricant is chosen for the job it does inside the circuit, not for a single headline number. The manufacturer’s data for this grade, read together with how a PVE lubricant behaves in an HFC system, points to a specific set of problems the oil is there to solve.
| System need | How Daphne FV50S meets it |
|---|---|
| Lubricity at the bearing | The manufacturer rates this product as a refrigeration and air-conditioning compressor lubricant for HFC service, with a measured viscosity of 50.69 cSt at 40 °C (ISO VG 46) that is matched to the load and the speed of the compressor it is specified for. |
| Miscibility with HFC refrigerant | PVE lubricants are used with HFC refrigerants such as R-134a, R-404A, R-407C and R-410A precisely because the oil has to travel with the refrigerant around the circuit and return to the compressor. PVE (polyvinyl ether) is a synthetic refrigeration lubricant used with HFC refrigerants such as R-134a, R-404A, R-407C and R-410A. It is a different chemistry from POE (polyol ester): both are synthetic, but they are not freely interchangeable in a system, so a top-up is made with the same lubricant family the compressor was charged with. |
| Low-temperature flow | The pour point published for this grade is -37.5 °C. That figure is the low-temperature end at which the oil still flows, and it is read first whenever a system runs a low evaporating temperature. |
| Thermal and chemical stability | The flash point is published as 206 °C under the Cleveland open cup method. A synthetic PVE base is chosen over a mineral oil where the discharge temperature and the refrigerant chemistry demand more stability than a mineral oil gives. |
| Correct family after a service fill | Because PVE and POE are different chemistries, the practical benefit of identifying this exact grade is that a top-up or a re-charge is made with the same lubricant family and the same viscosity band the compressor was built around. |
| Sourcing the right grade | The four DAPHNE grades on this page span ISO VG 32 to ISO VG 68, so a buyer can match the compressor’s requirement across a range rather than being forced onto a single product. |
Read as a whole, the data answers the questions that actually come up at a service desk: which lubricant family, which viscosity band, how cold it can run and how stable it is when hot. The figures quoted on this page are the typical values printed by the manufacturer in its own safety data sheet for this product; the manufacturer describes them as guidance for safe handling and states they are not to be treated as a quality specification. We reproduce them as a reference point and confirm the current data sheet with every quotation.
A refrigeration oil order goes wrong for a small number of predictable reasons, and each step below removes one of them. None of the steps needs a site visit; all of them can be answered from the compressor nameplate and the invoice.
If the nameplate is missing or unreadable, send a photograph of the compressor and the system details and we will work from that.
The table below reproduces the physical data the manufacturer publishes for this grade, as printed in its own document for the product. The figures quoted on this page are the typical values printed by the manufacturer in its own safety data sheet for this product; the manufacturer describes them as guidance for safe handling and states they are not to be treated as a quality specification. We reproduce them as a reference point and confirm the current data sheet with every quotation.
| Property | Daphne FV50S | Method / note as printed |
|---|---|---|
| Base fluid | PVE (polyvinyl ether) | Manufacturer’s designation |
| Viscosity at 40 °C | 50.69 cSt | Kinematic viscosity, as published |
| ISO viscosity grade | ISO VG 46 | Grade identification; the measured value is 0.09 cSt above the band edge (see note) |
| Pour point | -37.5 °C | As published |
| Flash point | 206 °C | Cleveland open cup |
| Density | 0.9315 g/cm³ (15 °C) | As published |
| Product code | 32450893 | Manufacturer’s product code |
| Refrigerant | HFC (R-134a, R-404A, R-407C, R-410A) | Application as published |
| Data source | Manufacturer safety data sheet for DAPHNE HERMETIC OIL FV50S (32450893) | Reproduced as printed |
★ Boundary note for this grade: the manufacturer measures 50.69 cSt at 40 °C, and the upper edge of the ISO VG 46 band is 50.6 cSt, so the measured value is 0.09 cSt above the edge — inside the tolerance of a routine measurement. Both numbers are given so the buyer can check them against the manufacturer’s own sheet.
The four grades listed here are all polyvinyl ether refrigeration oils from the same manufacturer, and they differ mainly by viscosity. The figures are taken from the manufacturer’s own documents for each grade, so the row can be read across without leaving the page.
| Grade | ISO VG | Viscosity at 40 °C | Pour point | Flash point | Product code |
|---|---|---|---|---|---|
| FVC32D | ISO VG 32 | 32.4 cSt | -47.5 °C | 178 °C | 32450850 |
| FV50S | ISO VG 46 | 50.69 cSt | -37.5 °C | 206 °C | 32450893 |
| FVC68D | ISO VG 68 | 66.57 cSt | -37.5 °C | 206 °C | 32450842 |
| FV68S | ISO VG 68 | 69.6 cSt | -32.5 °C | 210 °C | 32450877 |
★ This page is for FV50S. The other grades are shown so that the viscosity and the pour point can be compared directly; each is quoted from the manufacturer’s own document for that grade.
The DAPHNE HERMETIC OIL range covers a spread of viscosities for HFC refrigeration and air-conditioning compressors. The four grades tabulated on this page are the ones we list, from the lightest to the heaviest, and this grade is marked in the right-hand column.
The ISO VG column is the band the measured 40 °C viscosity falls in. This grade sits on the boundary and the note in its data table records both numbers.
Buyers arrive at this page either from the product name on a container or from the compressor they need to fill. This table maps both routes to the same answer, and states plainly which of the names are the manufacturer’s own designations and which are ours.
| Name or reference | What it is | Notes |
|---|---|---|
| FV50S | Manufacturer’s product name | The short name this grade is ordered under |
| DAPHNE HERMETIC OIL FV50S | Manufacturer’s full product name | As printed on the manufacturer’s own document |
| 32450893 | Manufacturer’s product code | The code the manufacturer uses for this grade |
| ISO VG 46 | ISO 3448 band | The band the measured 40 °C viscosity falls in (this grade sits 0.09 cSt above the band edge) |
| PVE | Lubricant family | Polyvinyl ether — a synthetic refrigeration lubricant for HFC systems |
| Qishanr QSL-46H | Our equivalent | Our own synthetic refrigeration oil at the nearest listed grade, from our plant in Foshan, China |
The manufacturer’s names and codes are reproduced as printed. The equivalent row is our own product and is labelled as ours.
The manufacturer prints a measured viscosity of 50.69 cSt at 40 °C for this grade, which falls inside the ISO VG 46 band of ISO 3448. That is why the grade is presented here with its class number: the number is not a marketing label, it is the band the manufacturer’s own measurement lands in.
The figures quoted on this page are the typical values printed by the manufacturer in its own safety data sheet for this product; the manufacturer describes them as guidance for safe handling and states they are not to be treated as a quality specification. We reproduce them as a reference point and confirm the current data sheet with every quotation.
The manufacturer measures 50.69 cSt at 40 °C and the upper edge of the ISO VG 46 band is 50.6 cSt, so the reading sits 0.09 cSt above the band edge. That is inside the repeatability of a routine kinematic viscosity measurement, so the grade is quoted and specified as ISO VG 46. Rather than round either figure, both the measured value and the band edge are given so the grade can be checked against the manufacturer’s own sheet.
The manufacturer publishes this data for the product itself rather than for a compressor series, so the compatibility of a given compressor with this oil should be confirmed against the compressor maker’s own charge instructions and against the refrigerant in use. The viscosity and the pour point on this page are the values the manufacturer prints, reproduced as printed, and they are not a substitute for the compressor maker’s own recommendation.
PVE (polyvinyl ether) is a synthetic refrigeration lubricant used with HFC refrigerants such as R-134a, R-404A, R-407C and R-410A. It is a different chemistry from POE (polyol ester): both are synthetic, but they are not freely interchangeable in a system, so a top-up is made with the same lubricant family the compressor was charged with.
PVE lubricants are used with HFC refrigerants such as R-134a, R-404A, R-407C and R-410A precisely because the oil has to travel with the refrigerant around the circuit and return to the compressor. Where the compressor maker has specified a PVE charge, that is the family to keep in the system.
The four grades in this DAPHNE range span from the lightest at 32.4 cSt to the heaviest at 69.6 cSt at 40 °C, which is what lets a compressor requirement be matched across a range rather than accepted as whatever single grade happens to be on the shelf.
The pour point is the number that decides whether a lubricant is usable in a low-temperature application: this grade is published at -37.5 °C, so a system whose evaporating temperature approaches that figure needs the miscibility and the flow checked before the charge is confirmed.
The viscosity, pour point, flash point and density on this page are the values the manufacturer prints in its own document for the product, reproduced as printed and rounded no further. Where a figure sits on a band edge the band edge is shown alongside it, so nothing on the page has to be taken on trust.
The flash point is the Cleveland open cup value, which is not directly comparable with a closed-cup figure and is not treated as one here.
We supply the original Idemitsu Daphne product, and we also manufacture a synthetic refrigeration oil at the nearest listed grade at our own blending plant in Foshan, China, in your own branded container or a custom pack format.
That means a single order can carry both the original grade and our own equivalent, so a buyer comparing a branded charge with a cost-down option does not have to open two supply channels to do it.
A: The manufacturer publishes 50.69 cSt at 40 °C for this grade, identified as ISO VG 46. This value sits 0.09 cSt above the upper edge of the ISO VG 46 band (50.6 cSt), which is within the tolerance of a routine viscosity measurement, so the grade is sold and specified as ISO VG 46.
A: Both are synthetic refrigeration lubricants used with HFC refrigerants, but PVE is polyvinyl ether and POE is polyol ester. They are different chemistries and are not freely interchangeable in a running system, so a top-up or a re-charge is made with the same lubricant family the compressor was built around.
A: The manufacturer identifies this product as a lubricant for refrigeration and air-conditioning compressors running HFC refrigerants, such as R-134a, R-404A, R-407C and R-410A. If your system uses a different refrigerant, confirm the lubricant family on the compressor nameplate before ordering.
A: The manufacturer publishes a pour point of -37.5 °C for this grade. It is the low-temperature end at which the oil still flows, and it is the first figure to check when a system runs a low evaporating temperature, because below it the oil can stop moving and stop returning to the compressor.
A: The published flash point is 206 °C, measured by the Cleveland open cup method. Because it is an open-cup figure it should not be compared directly with a closed-cup flash point, which is typically lower for the same oil.
A: The manufacturer publishes a density of 0.9315 g/cm³ (15 °C) for this grade.
A: No — not as a matter of routine. PVE and POE are different chemistries, and a top-up is made with the same lubricant family the compressor was charged with. If a system has to change family, that is a deliberate conversion with the oil flushed and the compressor maker’s instruction followed, not a top-up.
A: No fixed figure. The minimum is confirmed per order, because it moves with the grade, the quantity, the pack size and the destination. A single can and a full container load are both workable.
A: Yes. We supply the original Idemitsu Daphne product, and we also supply a synthetic refrigeration oil at the nearest listed grade manufactured at our own blending plant in Foshan, China, in your own branded container or a custom pack format.
A: The technical data sheet and safety data sheet come with the quotation, and a certificate of analysis for the delivered batch comes with the shipment.
A: Read the refrigerant and the lubricant family off the compressor nameplate, then match the viscosity band. This grade is ISO VG 46. If the compressor calls for a different band, one of the neighbouring DAPHNE grades on this page is the correct match.
A: Price is quoted on any Incoterms 2020 term — EXW, FOB, CFR, CIF, DDP and every other rule — against your destination port. Payment is on any commonly used method, including T/T, L/C and PayPal. Both are confirmed on the order rather than fixed in advance.
Every physical figure on this page is taken from a document published by the manufacturer rather than from our own measurement, so each one can be checked before the order is placed. This is the set of sources and what each one establishes.
| Source | What it establishes |
|---|---|
| Idemitsu Kosan Co., Ltd. — Safety Data Sheet for DAPHNE HERMETIC OIL FV50S (product code 32450893) | The manufacturer’s own document for this product. It identifies the base fluid as a polyvinyl ether (PVE), states the intended use with HFC refrigerants, and prints the physical data reproduced on this page — viscosity at 40 °C, pour point, flash point (Cleveland open cup) and density — together with the statement that the values are guidance for safe handling rather than a quality specification. |
| ISO 3448:1992 — Industrial liquid lubricants — ISO viscosity classification | The band system that gives every grade on this page its class number. The measured 40 °C viscosity printed by the manufacturer for FV50S is 50.69 cSt, which places it at ISO VG 46. The upper edge of that band is 50.6 cSt, so the reading sits 0.09 cSt above the edge; both figures are shown on this page rather than rounded. |
| Our own equivalent grade — Qishanr QSL-46H | The synthetic refrigeration oil we manufacture at our own blending plant in Foshan, China, at the nearest listed grade, for buyers comparing an original-brand charge with a cost-down option. |
The manufacturer’s names, codes and figures are reproduced as printed in its own document. The data is quoted as a reference point and the current data sheet is confirmed with every 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.
Send the compressor model, the refrigerant and the oil type on the nameplate, together with the quantity and the destination port. We will confirm the grade, the documents and the terms before quoting, and there is no fixed minimum order to work around.
Request a QuoteOriginal publication. The product data, specifications and compatibility charts published on this page for Daphne FV50S refrigeration oil were originally published by QishanrLubricants on 2026-08-05 at qishanrlubricants.com. © 2026 QishanrLubricants. All rights reserved.
Media, resellers and B2B evaluation. You are welcome to cite this page. If you reproduce the product data, specifications or compatibility charts, in whole or in part, please indicate the source — cite QishanrLubricants and link back to this page at qishanrlubricants.com.
Citing data or viewpoints. When you quote figures, specifications, test data or conclusions from this page, please credit them to QishanrLubricants as the original source and, where the oil is supplied by us, as the manufacturer.
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