Mono Compact C18B Pump
Spare Parts for Compact C18B Pump
Product Summary
The Mono Compact C18B represents a premium two-stage progressive cavity pump engineered for the most demanding high-flow industrial applications. Combining substantial pumping capacity with precision engineering, this heavy-duty model delivers exceptional performance in challenging process environments requiring both high pressures and flow rates.
- Maximum Flow Capacity: Large frame two-stage design provides industry-leading flow rates while maintaining the smooth, pulse-free operation essential for sensitive process applications
- Industrial-Grade Construction: Heavy-duty cast iron body and reinforced internal components engineered for continuous duty cycles in harsh operating conditions
- Advanced Pin Joint System: Sealed universal joint configuration ensures reliable torque transmission with extended service intervals and field-proven durability
- Superior Self-Priming: Exceptional suction lift capability exceeding 8 metres enables flexible installation positioning and eliminates need for flooded suction arrangements
- Process Versatility: Wide selection of elastomer and rotor materials available to handle everything from food-grade products to aggressive chemicals and abrasive slurries
Spare Parts List
Item = exploded-diagram reference from the Mono Compact manual (OMMP/032/01). Ordered by pump model + item. This page is for the Mono Compact C18B. The mechanical seal carries the real OEM part number for this model's shaft size.
| Select | Qty | Item | Part Number | Description | Material / Spec |
|---|---|---|---|---|---|
| 1 | 22A | 22A | Stator (specify elastomer) | C18B stator 24.6 kg; nitrile std / others to suit fluid | |
| 1 | 25A | 25A | Rotor | C18B rotor 33.7 kg; hard-chrome / stainless | |
| 1 | 26A | 26A | Coupling Rod | C18B rod/joint 12.3 kg | |
| 1 | 29A | 29A | Coupling Rod Pin | - | |
| 1 | 29B | 29B | Coupling Rod Pin | - | |
| 1 | 29C | 29C | Shaft Pin | - | |
| 1 | 32A | 32A | Drive Shaft | C18B shaft 8.7 kg | |
| 1 | 10A | M085139G | Mechanical Seal (DIN L1K, 85mm shaft) | OEM seal M085139G | |
| 1 | 65A | 65A | Mechanical Seal Carrier / Gland Section | - | |
| 1 | 66A | 66A | Abutment Ring | - | |
| 1 | 74A | 74A | Sleeve (Rotor / Shaft) | - | |
| 1 | 74B | 74B | Sleeve (Rotor / Shaft) | - | |
| 1 | 28A | 28A | Sealing Cover | - | |
| 1 | 28B | 28B | Sealing Cover | - | |
| 1 | 01A | 01A | Body (Standard Cast Iron) | - | |
| 1 | 23A | 23A | Suction Chamber | - | |
| 1 | 23B | 23B | Suction Chamber Extension | - | |
| 1 | 24A | 24A | End Cover | - | |
| 1 | 42A | 42A | Thrower | - | |
| 1 | 15A | 15A | Thrower Guard | - | |
| 1 | 62A | 62A | Support Foot | - | |
| 1 | 20B | 20B | Gasket - Gland | Non-asbestos | |
| 1 | P401 | P401 | Toroidal Seal Ring | - | |
| 1 | P402 | P402 | Toroidal Seal Ring | - | |
| 1 | P403 | P403 | Spiral Retaining Ring | - | |
| 1 | P404 | P404 | Spiral Retaining Ring | - | |
| 1 | P405 | P405 | Tie - Sealing Cover | - | |
| 1 | P406 | P406 | Tie - Sealing Cover | - | |
| 1 | 95A | 95A | Stator Tie Rod | - | |
| 1 | P104 | P104 | Hex Head Bolt | - | |
| 1 | P105 | P105 | Hex Nut | - | |
| 1 | P106 | P106 | Washer | - | |
| 1 | P107 | P107 | Single Coil Spring Washer | - | |
| 1 | P109 | P109 | Hex Nut | - | |
| 1 | P201 | P201 | Taper Plug | - | |
| 1 | P202 | P202 | Taper Plug | - | |
| 1 | P203 | P203 | Hex Socket Setscrew | - | |
| 1 | P509 | P509 | Toroidal Seal Ring | - | |
| 1 | P510 | P510 | Toroidal Seal Ring | - |
Item references are from the OEM manual for identification only; weights are guidance per the manual and exact build (stage count, quantities, gland packing vs mechanical seal) is confirmed at quote. Some references may not appear on every build. Associated washers/nuts and lubricants are available per the manual on request.
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Curve | Compact C18B / Two-Stage |
| Rated Power | Varies by application (typically 7.5 - 15 kW) |
| Voltage / Frequency | 240V/415V / 50Hz (other voltages available) |
| Rated Current | Application dependent |
| Discharge Connection | Flanged (size varies by application) |
| Impeller Type | Progressive Cavity (Helical Rotor/Stator) |
| Installation Type | Horizontal Baseplate Mounted |
Troubleshooting, Common Faults & Solutions
No Discharge from Pump
Likely Cause: Incorrect rotation direction, pump unprimed, or blocked delivery line
Action / Part: Verify motor rotation matches nameplate arrow, prime pump with liquid, clear blockages in discharge pipework
Loss of Capacity / Reduced Flow
Likely Cause: Worn rotor/stator elements, insufficient NPSH, or air entering suction line
Action / Part: Replace rotor (25A) and/or stator (22A), increase suction head, check gland adjustment and pipe joints for air leaks
Pump Stalls at Start-Up
Likely Cause: Product viscosity too high, low voltage, or drive train failure
Action / Part: Heat product to reduce viscosity, verify electrical supply voltage, inspect coupling rod (26A) and pin joints (29A, 29B, 29C) for damage
Excessive Noise and Vibration
Likely Cause: Misaligned coupling, worn bearings, or insecure pump mounting
Action / Part: Check and adjust alignment to motor/gearbox, replace shaft bearings (lubricate with BP LC2 grease), tighten all baseplate mounting bolts
Excessive Gland or Seal Leakage
Likely Cause: Worn drive shaft, damaged mechanical seal, or inadequate gland flush
Action / Part: Replace drive shaft (32A) if gland area worn, install new mechanical seal assembly (10A), ensure proper seal flush fluid flow
Motor Overheats / Excessive Power Draw
Likely Cause: Delivery pressure above rated limit, gland overtightened, or pump speed too high
Action / Part: Check for delivery line blockages, loosen packed gland to allow slight drip, reduce pump speed, verify relief valve setting
Rapid Stator Wear / Premature Failure
Likely Cause: Dry running, abrasive product, or product temperature exceeding rating
Action / Part: Install dry-run protection device, ensure pump always primed before starting, cool product or upgrade to temperature-rated stator material, replace with new stator (22A)
Stuffing Box Rapidly Consumes Packing
Likely Cause: Worn shaft surface in packing area
Action / Part: Inspect drive shaft (32A) for wear grooves, replace shaft if gland area damaged, ensure regular gland maintenance schedule
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