Kaeser ASD / BSD / CSD Series

Name: Kaeser ASD / BSD / CSD Series
Brand: Kaeser

30–165 hp direct-drive rotary screw family. ASD is the small-frame; BSD/CSD/CSDX step up in flow. All use Sigma Control 2 and Sigma Profile airends.

Type

Oil-flooded rotary screw

Power

30–165 hp (22–125 kW)

Flow

120–830 cfm

Pressure

80–217 psig (5.5–15 bar)

Cooling

air-or-water

Drive

direct

Lubrication

oil-flooded

Models

ASD 30–60, BSD 60–100, CSD 82–125, CSDX 137–165

Years produced

ASD/BSD ~2005 – present; CSD/CSDX ~2007 – present.

Sound level

~66–75 dB(A) @ 1 m depending on frame (enclosed).

Dimensions

ASD: ~48"×35"×63"; BSD: ~60"×39"×70"; CSD: ~76"×47"×74"; CSDX: ~84"×54"×79".

Weight

ASD 30 ~1,300 lb up to CSDX 165 ~5,000 lb depending on frame & cooling.

Ambient range

40–115 °F (4–46 °C) air-cooled; water-cooled higher.

Motor efficiency

IE3 / NEMA Premium TEFC standard. IE4 optional on newer builds.

Starter

Wye-Delta standard; SFC variants use Siemens VFD.

Integrated dryer

T-variants include refrigerated dryer & filtration package.

Warranty

5-year airend / 2-year package typical.

Control modes

Dual
Quadro
Vario
Continuous
Dynamic
Automatic

Typical applications

General plant air
Auto assembly
Food & beverage (with SR fluid)

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: Sigma Fluid S-460 or SR (food-grade optional)

Capacity: ASD: ~8 gal, BSD: ~11 gal, CSD: ~13 gal, CSDX: ~17 gal

Change interval: 8,000 hr / 2 yr

Approved alternatives

Sigma Fluid SR (H1 food grade)
Sigma Fluid FG-460

Wear parts

Category	Interval	Source
Air filter (dry, panel or radial)	2,000 hr or ΔP
Oil filter (spin-on, dual on CSDX)	2,000 hr
Separator element	4,000 hr
Sigma Fluid	8,000 hr
Motor bearings (regrease)	4,000 hr / per motor plate
Coupling element (Centaflex or equivalent)	Inspect annually
MPCV rebuild kit	16,000 hr / as needed
Inlet valve rebuild kit	16,000 hr / as needed

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

6.4143.0 (ASD/BSD), 6.4162.0 (CSD)

Aftermarket

P780522— Donaldson
PA2691— Baldwin
C 30 850/2— Mann-Filter

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.

P780522— DonaldsonLikely
source
PA2691— BaldwinLikely
source
C 30 850/2— Mann-FilterLikely
source

Oil / fluid filter

Fluid filter

OEM

6.1982.0

Aftermarket

P550426— Donaldson
B7577— Baldwin
SO 6119— Hifi

P550426— DonaldsonLikely
source
B7577— BaldwinLikely
source
SO 6119— HifiLikely
source

Air-oil separator

Sigma Fluid separator (integrated)

OEM

6.3574.0 (ASD), 6.3577.0 (BSD), 6.3580.0 (CSD)

Aftermarket

P785390— Donaldson
OS 5316— Hifi

P785390— DonaldsonLikely
source
OS 5316— HifiLikely
source

Different element per frame size — do not substitute across ASD/BSD/CSD.

Lubricant

Sigma Fluid S-460

OEM

9.4717.0

Aftermarket

Rarus SHC 1025— Mobil
Tegra 46— Chevron

Rarus SHC 1025— MobilUnverified
Tegra 46— ChevronUnverified

Controller memory battery

Sigma Control 2 memory battery

OEM

7.7002.0

Aftermarket

BR-2/3AGCT4A— Panasonic

BR-2/3AGCT4A— PanasonicUnverified
3 V lithium; replace with power on to preserve params.

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

Motor bearing failure on units run past regrease interval
Cooler pluggage in dusty environments — schedule quarterly cabinet vac
Sigma Control 2 comm faults after firmware update — reload known-good SD image
Coupling wear on hard-loaded ASD after 20k hr

Known issues & field notes

Water-cooled variants prone to fouled tube bundles in hard-water plants — RO or softened supply recommended
CSDX oil pump priming on cold-climate installs — cabinet heater option worth spec'ing

Controller(s)

Sigma Control 2 — 2-line 20-character alphanumeric backlit LCD (STN), 4 discrete status LEDs (Power, Running, Communication, Alarm), 12-key membrane keypad with soft menu keys.

Strengths

Sigma Profile airend efficiency
Water-cooled option for hot ambient
SFC variants offer VFD
Excellent parts availability in NA

Weaknesses

Dealer-only parts pricing on Sigma-branded consumables
SFC drive rebuild is dealer-scope

Field notes

Backbone of Kaeser's industrial screw line. Available as air-cooled, water-cooled, and VFD (SFC).