Mono Compact C14B Pump

Spare Parts for Compact C14B Pump

This page lists replacement and compatible spare parts for Mono pumps.
Pump Spares Direct is an independent supplier and is not affiliated with, endorsed by, or authorised by Mono.

Image shown for pump identification purposes only.

Product Summary 

The Mono Compact C14B is a two-stage progressive cavity pump engineered for demanding industrial applications requiring enhanced pressure capability. Combining dual-cavity helical rotor technology with sealed pin joint drive, this pump delivers reliable high-pressure performance with excellent suction characteristics across diverse operating conditions.

  • Two-Stage High Pressure: Dual-cavity configuration provides superior pressure generation capability while maintaining smooth, pulsation-free flow for demanding transfer applications
  • Pin Joint Drive System: Sealed universal joint coupling rod design ensures reliable torque transmission with accessible maintenance points and extended service intervals
  • Exceptional Self-Priming: Achieves suction lift exceeding 8 metres with robust air-handling performance, enabling flexible installation above supply vessels
  • Bi-Directional Capability: Reversible rotation functionality provides operational versatility for specialized process requirements and emergency situations
  • Robust Construction: Available in cast iron or stainless steel with multiple elastomer options ensuring chemical compatibility and temperature resistance for varied applications

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Spare Parts List

Select the required parts below to include them in your quote request.

OEM part numbers are referenced for identification purposes only.
All parts listed are suitable for use in Mono C14B pumps.

Exploded Parts Views 

Exploded view shown for reference only. Part numbering may vary by configuration.

Key Technical Specifications 

Select Qty Part Number Description Material / Spec
1 C14B-KIT-FULL Complete Rotor/Stator Service Kit Includes rotor, stator, gaskets
1 C14B-KIT-SEAL Mechanical Seal Service Kit Complete seal assembly with gaskets
1 C14B-KIT-PIN Pin Joint Service Kit Complete joint assembly with pins
1 22A Stator Assembly Nitrile rubber (MTM grade) - 7.1 kg
1 25A Rotor Assembly Stainless steel helical - 4.5 kg
1 26A Coupling Rod Assembly Pin joint type - 1.2 kg
1 32A Drive Shaft 45mm diameter, hardened steel - 1.7 kg
1 10A Mechanical Seal Assembly DIN L1K type, 45mm shaft (M045139G)
1 65A Mechanical Seal Carrier Cast iron housing
2 29A Coupling Rod Pin Hardened steel
2 29B Coupling Rod Pin (Drive End) Hardened steel
1 29C Shaft Pin Hardened steel
1 28A Sealing Cover (Suction End) Rubber boot seal
1 28B Sealing Cover (Drive End) Rubber boot seal
1 75A Rotor/Shaft Sleeve Stainless steel protective sleeve
1 75B Rotor/Shaft Sleeve (Secondary) Stainless steel protective sleeve
4 95A Stator Tie Bar High tensile steel tie rod
1 23A Suction Chamber Cast iron housing
1 24A End Cover Cast iron end plate
1 01A Pump Body Cast iron main casing
1 42A Thrower Shaft protection disc
1 15A Thrower Guard Protective cover assembly
1 66A Abutment Ring Seal support ring
2 62A Support Foot Cast iron mounting foot
1 20B Gland Gasket Non-asbestos material
2 P401 Seal Ring Toroidal seal ring
2 P402 Seal Ring (Large) Toroidal seal ring
2 P403 Spiral Retaining Ring Spring steel
2 P404 Spiral Retaining Ring (Secondary) Spring steel
Parameter Value
Model / Curve Compact C14B / Two-Stage
Rated Power Varies by application (typically 4.0 - 7.5 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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