Emkarate RL 100H

Emkarate RL 100H is an ISO VG 100 synthetic polyolester (POE) lubricant formulated specifically for refrigeration and air-conditioning compressors using HFC refrigerants. The VG 100 grade serves screw and heavy reciprocating duty where bearing loads demand more film than VG 68 provides.

The Emkarate RL family is the most OEM-approved, most recognized POE line in the market — more than one billion compressors worldwide have been factory-filled with Emkarate RL. It provides effective wear protection for steel and aluminium surfaces, is suitable for both initial fill and service fill, and its combination of low-temperature characteristics with chemical and thermal stability supports a wide operating temperature range.

The number in the name is the ISO viscosity grade, and that is what you match. We stock RL 32H (scroll and small reciprocating), RL 68H (the default mid-viscosity service grade), RL 100H (heavy reciprocating and screw platforms that specify VG 100) and RL 170H (screw-compressor duty). Read the grade off the compressor nameplate or the OEM service manual — not off the refrigerant, and not from what the last engineer left in the plant room.

A heavier grade is not a safer choice. VG 100 is specified where bearing loading and oil-injection design require it; using it in a machine designed for VG 32 or VG 68 hurts oil return and can starve the circuit. The reverse — running a VG 100 machine on a lighter oil because that is what was in stock — costs bearings. If the nameplate is unreadable, send us the compressor model and we will confirm the grade.

Do not substitute across lubricant families. POE is not interchangeable with mineral oil (R-22, R-12 plant), with alkylbenzene, or with automotive PAG oils.

Handle POE as a moisture-sensitive product. It draws water from the air far faster than mineral oil, and that moisture becomes acid inside a running system. Keep the pack sealed until charging, use an opened container promptly, never decant into an open jug, and fit a fresh filter drier with every oil change.

Order RL 100H when a screw compressor, large semi-hermetic reciprocating machine or industrial chiller specifies an ISO VG 100 polyolester — scheduled oil changes, oil-separator top-ups and post-overhaul refills on plant where the OEM has called out that grade.