Tamrotor Marine Compressor 04013221

Tamrotor Marine Compressor Code: 04013221 Rotary Screw Air Compressor

The Tamrotor Code: 04013221 is a rotary screw marine air compressor/screw compressor element (airend) engineered for demanding shipboard duty cycles. Built by Tamrotor (Gardner Denver OEM / TMC legacy standard) in Finland, this positive-displacement, oil-injected rotary screw unit supplies consistent working air, control air, and pneumatic automation services for commercial merchant vessels, offshore platforms, supply vessels, and specialized tankers.

The 04013221 bare element and assembled skid package withstand high ambient engine room temperatures (up to +55°C), high-vibration environments, and roll/pitch variations under rough sea conditions. This unit delivers continuous pulse-free airflow with minimal internal recirculation losses, high volumetric efficiency, and low specific power consumption across full-load and modulating unloading profiles.

Technical Details

Model Details

• Brand / Original Manufacturer: Tamrotor Marine Compressors
• OEM Part Number / Code: 04013221
• Standard Dry Weight: Approximately 57.0 kg (125.7 lbs) bare-shaft
• Origin: Finland

Part Number Cross-References & Supersessions:

• Tamrotor Core Code: 0401-3221 / 04013221
• Related Assembly Lineage: 04013223RB (Factory Remanufactured Code)
• Marine Packager Cross-Ref: TMC Tamrotor Series E-line / Tempest Modular Air Ends
• Equivalent Impeller/Airend Housing Series: Tamrotor Enduro / Tempest Series marine configurations

Compatibility

• TMC (Tamrotor Marine Compressors) Packaged Units: Direct drop-in replacement for E-Series marine screw compressors (e.g., TMC E12, TMC E15, and Tempest compact skid sets).
• Drive Motor Matching: Directly pairs with marine-rated IEC frame electric motors (IEC 132M, 160M/L, 2-pole or 4-pole, 3-Phase 380V/440V/480V, 50/60 Hz, IP55/IP56).
• Transmission Compatibility: Configured for high-torque V-belt drive sheaves (SPB/SPC taper-lock pulleys) or flexible claw/spider direct-drive couplings.
• Auxiliary Equipment: Direct drop-in match for Mann & Hummel or OEM Tamrotor spin-on oil separators and modular thermostatic mixing valves (TMV).

Key Features

1. Marine-Optimized Asymmetric Profile: Precision-machined rotor geometry reduces clearance blow-back, minimizing internal recirculation losses and delivering maximum CFM per kilowatt.
2. Rigid One-Piece Iron Casing: Thick-walled EN-GJL-250 casting absorbs harsh hull torsional deflections and dampens acoustic resonance within crowded shipboard machinery spaces.
3. Pre-Loaded Precision Marine Bearing Stack: Features dual angular-contact thrust bearings combined with heavy cylindrical roller bearings to counteract high belt tension and axial load reversals.
4. Zero-Leakage Multi-Lip Shaft Sealing: Triple-barrier Viton/PTFE dynamic shaft seals equipped with an active vacuum scavenge port to prevent lubricating oil loss along the drive stub.
5. High Thermal Tolerance: Engineered to operate seamlessly in poorly ventilated tropical engine rooms with continuous ambient machinery-space temperatures up to +55°C.

Frequently Asked Questions

What is the exact function of the Tamrotor 04013221 compressor block?

The 04013221 unit is the central rotary screw air end (compression core) of a marine air compressor package. It receives raw atmospheric air via the suction valve, mixes it with synthetic oil for lubrication and cooling, compresses the air/oil pocket along the helical screws, and discharges it to the vessel’s primary air/oil separator reservoir.

Can this unit be used for starting air systems on main diesel engines?

No. Rotary screw compressors typically operate between 7.0 and 13.0 bar g (service and control air levels). Main engine direct air starting requires high-pressure reciprocating piston compressors capable of 30.0 bar g. The 04013221 is engineered for ship service air, pneumatic controls, valve automation, and nitrogen generation supply lines.

Which lubricating oil is approved for this rotary screw compressor?

You must use OEM-specified synthetic screw compressor oil with an ISO VG 46 or ISO VG 68 viscosity grade, fortified with demulsifying agents, oxidation inhibitors, and anti-foam additives. Mineral motor oils or hydraulic fluids must never be used, as they will foam, fail to demulsify condensed water, and rapidly clog the spin-on separator element.

What is the typical overhaul interval for the internal bearing stack?

Under standard marine operating parameters with clean oil and correct operating temperatures, the precision bearings have an operational lifespan of 20,000 to 24,000 running hours. Immediate overhaul is recommended if high-frequency spectrum vibration exceeds 4.5 mm/s RMS or if metallic debris is detected in the scavenge filter line.