Sealing Cover Kit – SICOMA MAO 3000/2000 – MOSAP8

The MOSAP8 Sealing Cover Kit serves as the vital "axial loading plate" in the shaft sealing setup of SICOMA MAO 3000/2000 twin-shaft mixers. It plays an important role in keeping the system intact in ready-mix concrete batching plants and is built to turn mechanical force into even circular pressure.

By anchoring the protective elements to the main housing, the Sealing Cover Kit MOSAP8, ensures that the elastomeric seals (such as the Yellow Vulkandisk) remain actively compressed. This creates a live, impenetrable barrier against abrasive concrete slurry, preventing leakage and extending the service life of the bearing group.

Kit Contents: What's in the box?:

(Note: This kit provides the complete hardware set required for closing the sealing chamber.)

• 1x MOSAP8: Sealing Cover (Pressure Flange)
• 4x MOSAP12: Tie Rods M6 (L=110mm)
• 4x DAM06: Self-Locking Nuts M6

Component Insights & Functions:

• MOSAP8 (Sealing Cover): A pipe-steel flange machined to precise flatness. Its task is to distribute the clamping load evenly against the sealing stack, preventing seal extrusion.
• MOSAP12 (Tie Rods): These 110mm fully threaded rods serve as the tensioning backbone. Their specific length allows them to traverse the thick sealing pack of the MAO 3000/2000 series, deeply anchoring the assembly.
• DAM06 (Nuts):  These self-locking nuts prevent "back-off" from the mixer's shaking loads.

Technical snapshot:

• Mixer Model: SICOMA MAO 3000/2000 (Twin Shaft)
• Part Type: Axial Clamping / Sealing Cover Group
• Cover Dimensions: ID 159 mm | OD 210 mm | Thickness 12 mm
• Material: Heat-treated steel
• Mounting Interface: 4-hole standard connection

Abbreviations:

• ID / OD: Inner Diameter / Outer Diameter

Why replacement matters?:

A drop in clamping force due to cover warping, assembly errors, or fatigue allows micro-movements of the sealing unit.

• Grease leakage begins as the pressure on the Vulkandisk fades.
• Fretting corrosion may develop on mating surfaces.
• In advanced stages, the lack of retention allows slurry to bypass the seals, leading to bearing contamination and unplanned batching plant downtime.

What to check before ordering:

This clamping ring is an integral part of the MOSACOM sealing kit, but the MOSAP8 designation is a spacer ring category, not a universal part number.

• Compatibility Alert: Dimensions (ID 159mm / OD 210mm) are specific to certain Sicoma mixer models (MAO 3000). It is not interchangeable with covers from the MAO 1500 or 4500 series.
• Recommendation: Ensuring caliper measurement of the shaft diameter and verification of the Sicoma spare parts catalog against the mixer's serial number is the only way to guarantee the correct item.

Installation notes:

• Cleanliness: Assembly integrity relies on the absolute cleanliness of both the cover faces and the mating rubber seal surface.
• Torque Strategy: Tightening using MOSAP12 studs and DAM06 nuts must be performed in a criss-cross (star) pattern and incrementally.
• Alignment: Precise axial alignment of the mounting holes with the housing and other rings (MOSAP10 and MOSAP 9) is critical to prevent binding or cocking.