By Qishanr Technical Team · Published 11 September 2026
Customer field report · scroll compressor assembly · bulk supply
Direct answer: A customer assembling scroll compressors has replaced Bitzer BSE32 with Qishanr QSL-32H. Both are ISO VG32 polyol ester oils, so the change matches on oil family and on viscosity grade — the two things that decide whether an assembly-line fill behaves like the oil it replaces. What the customer reports from moving this grade into bulk supply is consistent quality order after order, at a lower overall cost. Below are the reference data, the cross-reference names, and the controls that keep a line's oil consistent from lot to lot.
| Item | Detail |
|---|---|
| End use | Scroll compressor assembly — factory fill on a production line |
| Oil replaced | Bitzer BSE32 — ISO VG32 polyol ester |
| Oil supplied | Qishanr QSL-32H — ISO VG32 full synthetic polyol ester (POE) |
| Buying pattern | Bulk, repeat orders |
| Customer observation | Consistent quality across bulk orders |
| Commercial result | Lower cost than the previous oil |
The source for this case is a single customer message, quoted in full:
“We use this oil for scroll compressor assembly, replacement for Bitzer BSE32. Consistent quality for bulk orders, save our cost.”
Three things stand out for anyone buying oil for a production line: the oil goes into new-build compressors rather than into service top-ups, the grade it displaces is Bitzer's own ISO VG32 ester, and the order pattern is bulk and repeat. Those three facts decide what the purchase has to get right.
Bitzer BSE32 and Qishanr QSL-32H are both ISO VG32 polyol ester lubricants formulated for HFC refrigerants, so a change from one to the other stays inside the same chemistry family and the same viscosity grade. On an assembly line that matters more than it does in service work: the oil is the last fluid to enter the compressor before it is sealed and shipped, and the grade decision is then repeated on every unit that follows. Matching family and grade is what keeps the fill like-for-like from the first compressor to the ten-thousandth.
A VG32 ester answers all five. The part that has to be engineered on the buying side is the sixth requirement, which never appears on a data sheet: the same oil, in the same condition, arriving again next quarter.
In aftermarket service, oil is judged one machine at a time and the top-up matters less than the diagnosis around it. On an assembly line the same grade is drawn from the same drum, station after station, all year. That shifts the centre of gravity of the purchase from the specification sheet to the consistency between deliveries.
The viscosity sits inside the ISO VG32 window, the base-oil chemistry is the same, the additive package is the same, and the batch behaves the way the last batch did. For a line that has already proved a fill in its own testing, that repeatability is the whole value of the second order.
A lot number on every drum lets a production question be answered from paperwork — which batch of oil went into which shift of units — rather than from memory.
Line-side supply works best when the pack size matches consumption and the dispensing equipment: too large and the drum sits open collecting moisture, too small and the line stops for reordering. A scheduled bulk supply keeps the line running without parking a year of stock in the warehouse.
These are the QSL-32H reference values used across our refrigeration oil guides — the figures a line-fill review starts from.
| Property | QSL-32H reference value | Why it matters in assembly |
|---|---|---|
| Base oil / grade | Full synthetic polyol ester (POE), ISO VG32 | Same family and grade as BSE32 — a like-for-like line fill. |
| Viscosity @ 40 °C | 33.3 cSt | Inside the ISO VG32 window, so the fill matches the specified grade. |
| Viscosity @ 100 °C | 6.0 mm²/s | Holds film strength at the discharge end of the compressor. |
| Viscosity index | 130 | Keeps viscosity stable across a plant's ambient range. |
| Density @ 20 °C | 1024 kg/m³ | Converts between the volume a dispenser doses and the mass on the paperwork. |
| Flash point (COC) | 235 °C | Thermal margin for high discharge temperature duty. |
| Pour point | −50 °C | Keeps the oil flowing for low-temperature builds. |
| Available packaging | 1 L / 5 L / 10 L / 20 L / 200 L | Lets a line-side fill and a bulk drum draw on the same sealed product. |
Full product details and the packaging options are on the Qishanr QSL-32H product page.
BSE32 is Bitzer's own ISO VG32 ester for HFC refrigeration duty. QSL-32H sits in the same family and the same viscosity grade, which is what makes it a usable cross-reference for a build that already specifies a VG32 POE. Names that buyers compare against QSL-32H in this grade:
A cross-reference list is the start of a selection, not the end of one. Match the grade to the compressor documentation, fix the refrigerant the build uses, agree the oil charge per unit and the dispensing setup, and the same list becomes a released line fill. Our QSL-68H cross-reference guide walks through the same comparison method on the VG68 grade.
Consistency is bought as much as it is manufactured. This is the routine that puts it under the buyer's control:
The customer's own summary of the switch was lower cost. For a production line that number has three parts, and only one of them is on the quotation:
The cheapest drum and the lowest cost per assembled compressor are frequently two different numbers. The comparison that holds is total annual cost at a fixed grade and a fixed supply rhythm.
| Best fit | Where to choose differently |
|---|---|
| Scroll compressors on HFC refrigerants where the build already specifies an ISO VG32 polyol ester. | Builds that specify a different viscosity grade, or a PAG / PVE oil for a different refrigerant family. |
| Assembly lines moving from Bitzer BSE32, or from another VG32 ester, to a second source at a lower cost. | A build whose documentation names one approved oil and does not permit an alternative. |
| Buyers placing repeat bulk orders who need lot numbers and batch values travelling with each delivery. | One-off purchases where pack-size flexibility and delivery rhythm change nothing about the cost. |
Both are ISO VG32 polyol ester oils for HFC refrigeration, so the change stays within one oil family and one viscosity grade — the condition for a like-for-like fill. Confirm the requirement against the compressor documentation and the refrigerant the build uses before the grade is released on the line.
Yes. QSL-32H is formulated for HFC systems including R134a, R404A, R407C and R410A, and is used in scroll, reciprocating, screw and centrifugal compressors. Its miscibility with the refrigerant and its pour point of −50 °C make it suitable for both comfort cooling and low-temperature builds.
Yes. Bulk supply is scheduled against your annual volume with packaging from 20 L and 200 L drums, and each delivery carries its lot number so the fill can be traced to a production run. Tell us the pack size your dispensing station uses and the rhythm the line runs at.
The grade you need, compressor type and model, refrigerant, oil charge per unit, annual volume, preferred pack size, how the oil is dosed on the line, destination port, and the documentation your quality team requires. With those details the quotation comes back as a line-fill offer rather than a price for a drum.
Moving a production line onto a second-source VG32 ester? Send the grade, the compressor family and your annual volume, and we will come back with a bulk supply plan and lot documentation.
