Sullair LS-Series (LS 10–25S)

Name: Sullair LS-Series (LS 10–25S)
Brand: Sullair

40–250 hp direct-drive oil-flooded rotary screw platform. Runs Sullube polyglycol fluid on 8k-hour change intervals.

Type

Oil-flooded rotary screw

Power

40–250 hp

Flow

150–1,300 cfm

Pressure

100–200 psig

Cooling

air-or-water

Drive

direct

Lubrication

oil-flooded

Models

LS-10, LS-16, LS-20, LS-25, LS-25S

Years produced

LS platform in production since 1980s; multiple refreshes; current cabinet ~2015.

Sound level

~72–80 dB(A) @ 1 m.

Dimensions

LS-16: ~74"×48"×72"; LS-25S: ~130"×54"×82".

Weight

LS-10 ~3,500 lb; LS-25S ~8,000 lb.

Ambient range

40–115 °F standard; high-ambient package available.

Motor efficiency

NEMA Premium TEFC / IP55.

Starter

Wye-Delta standard; VSD variants use Yaskawa or similar drive.

Integrated dryer

-JD variants ship with integrated dryer.

Warranty

SullairCare programs; long-block airend rebuild programs.

Control modes

Load/Unload
Modulation
Dual Control
VSD

Typical applications

Heavy manufacturing
Aerospace
Petrochemical
Marine

Specs & intervals below are from publicly published OEM literature and long-standing field practice. Torque values, exact revision-dated part numbers, and safety-critical settings vary by serial number — always cross-check the unit’s OEM manual and nameplate before ordering parts or performing service.

Fluid

Spec: Sullair Sullube (polyglycol) — 8,000 hr; AWF for elevated ambient

Change interval: 8,000 hr

Approved alternatives

AWF (elevated ambient)
24KT (high-hour hospital / hot ambient)

Torque guidance

Separator canister torque per OEM sheet; MPCV spring preload set at factory — do not modify.

Always verify torque values against the OEM service manual for the specific serial number.

Wear parts

Category	Interval	Source
Air filter (heavy-duty radial)	2,000 hr or ΔP
Fluid filter (spin-on or cartridge)	2,000 hr
Separator element	4,000 hr
Sullube fluid	8,000 hr
MPCV rebuild kit	8,000 hr
Coupling insert	Inspect at each service
Motor bearings	Per motor plate

Consumable part numbers change by revision and region — pull the current number from the OEM portal.

Parts cross-reference

OEM part numbers with commonly-cited aftermarket equivalents. Verify against the nameplate and OEM parts portal before ordering — dimensionally similar filters can still be wrong for the application.

Air filter

Intake air filter

OEM

02250135-149, 88290006-013

Aftermarket

P181054— Donaldson
PA2848— Baldwin
SA 16006— Hifi

VerifiedConfirmed against a public OEM or aftermarket catalog / cross-reference tool at time of entry.LikelyCommonly cited in the vendor's cross tool or long-standing field usage; not independently re-verified against the current OEM parts list.UnverifiedDimensional lookalike or user-reported.

P181054— DonaldsonLikely
source
PA2848— BaldwinLikely
source
SA 16006— HifiLikely
source

Oil / fluid filter

Fluid filter (spin-on)

OEM

250025-525, 02250168-053

Aftermarket

P550779— Donaldson
B7350— Baldwin
LF3335— Fleetguard
SO 6603— Hifi

P550779— DonaldsonLikely
source
B7350— BaldwinLikely
source
LF3335— FleetguardLikely
source
SO 6603— HifiLikely
source

Air-oil separator

Air-oil separator element

OEM

02250100-755, 02250153-499

Aftermarket

P522449— Donaldson
OAS30001— Baldwin
OS 5205— Hifi

P522449— DonaldsonLikely
source
OAS30001— BaldwinLikely
source
OS 5205— HifiLikely
source

Lubricant

Sullube 32 (PAG)

OEM

250022-669 (5 gal), 250022-670 (55 gal)

Aftermarket

PG-8000-32— Summit
Compro XL-S 32— Petro-Canada

PG-8000-32— SummitUnverified
Compro XL-S 32— Petro-CanadaUnverified
Verify PAG compatibility.

PAG lubricant. NEVER mix with PAO, diester, or petroleum.

Need to look up a number across all models? Use the parts cross-reference search.

Preventive maintenance

Daily

Check fluid level in sight glass at running temp
Listen for unusual noise / vibration
Check discharge pressure & temperature vs baseline
Verify condensate drain function
Log package amps if metered

Weekly

Blow down receiver and drain traps
Check for oil carryover at first drop leg
Inspect for fluid or air leaks around airend and separator tank
Verify safety valve is not weeping

Every 2,000 hr / 6 mo

Change fluid filter
Change air filter (or sooner per ΔP)
Sample fluid for TAN / metals / water
Clean cooler exterior with low-pressure air (never > 30 psi against fins)

Every 4,000 hr / 12 mo

Change separator element
Change fluid
Inspect scavenge line & orifice for coking
Check coupling / belt alignment & wear
Torque electrical lugs to spec (typ. 45–75 in-lb #4–2/0 AWG)

Every 8,000 hr

Rebuild inlet valve
Rebuild minimum-pressure check valve
Regrease or replace motor bearings per OEM interval
Verify safety valve setpoint against gauge

Common faults & first checks

High sump temp — thermal valve or cooler
Change separator alarm — do fluid+filter as full kit
Cold-start separator ΔP false alarm — recheck after 30 min run
MPCV stuck at unload — sump won't blow down

Known issues & field notes

Sullube absorbs water aggressively — check for water in fluid at each PM in humid plants
Retrofitting from Sullube to PAO requires 3 flushes with new fluid

Controller(s)

Sullair Supervisor / WS Controller — Supervisor: 5.7" color TFT with membrane keys; WS Signal: 4-line 20-char monochrome LCD.

Strengths

Sullube 8k-hour fluid life
Robust for heavy-duty industrial
Wide dealer network in NA
Long airend life

Weaknesses

Sullube must not be mixed with mineral or PAO
Retrofitting to non-Sullube fluid requires airend flush procedure

Field notes

LS-Series is Sullair's core industrial screw. Available in fixed-speed and VSD.