What type of refrigeration oil should I use for my screw compressor?

Screw compressors typically require POE (Polyol Ester) oils for HFC refrigerants like R134a and R407C, or mineral oils for HCFC systems like R22. The viscosity grade (usually ISO VG 32-68) depends on the compressor manufacturer's specifications. Brands like Bitzer recommend BSE series POE oils, while FUSHENG systems often use mineral oil formulations.

What is the difference between POE and mineral refrigeration oil?

POE (Polyol Ester) oils are synthetic lubricants designed for HFC refrigerants (R134a, R404A, R407C, R410A) and are hygroscopic, requiring careful moisture control. Mineral oils (MO) are petroleum-based, used with CFC and HCFC refrigerants (R22, R502), and are less expensive but incompatible with modern HFC systems. POE oils offer better thermal stability and miscibility with newer refrigerants.

How do I select the right refrigeration oil for a centrifugal chiller?

For centrifugal chillers, select oil based on the OEM specification (e.g., Trane OIL00037, York PureOil S), the refrigerant type (R123 low-pressure or R134a medium-pressure), and the required viscosity grade. Most modern centrifugal chillers use POE oils with ISO VG 32-68. Always verify compatibility with the chiller manufacturer's technical bulletin and ensure the oil meets the required pour point for your operating conditions.

R-410A Refrigerant Gas 11.3KG (25LBS),HFC Refrigerants,R410A

Description

Introduction:

R410A also called Puron, or HFC-410A is a rose-colored, no flammable HFC refrigerant gas for HVAC units and refrigeration compressors.

It is an ideal substitution for R22 refrigerant gas. HFC-410A is a hy brid of refrigerant gas consisting of 50% R32 and 50% R125 but not any chlorine.

As a chlorine-free refrigerant gas, R410A is very beneficial for the environment and does not harm the structural layers of the atmosphere.

This R410 has no impurities and stabilizers, so it’s recommended to use in new domestic ac units, refrigeration condenser units, etc.

Specification:

Name	Blend of Difluromethane & Pentafluroethane
Model	R410a, HFC-410a, R-410a
Classification	HFC Refrigerant - Blend
Formula	CH2 F2, CHF2CF3
Cas No.	75-10-5 / 354-33-6
Replacement for	HCFC R-22 Freon

Application:

R410A is suitable for new high-pressure systems, such as water cooling equipment, cabinet units, close control units and cooling devices in comfort air conditioning systems, residential & commercial air-conditioning,industrial refrigeration, chillers, and centrifugal compressors. The refrigerant is used in many commercial and industrial refrigeration applications.