Mono CP25 Pump
Spare Parts for CP25 Pump
Product Summary
The Mono CP25 is a compact progressive cavity (helical rotor/stator) pump built for long, trouble-free service across light-industrial, agricultural and domestic duties. It transfers wine and beverages, runs filling machines, doses weak acids and alkalis, and handles sump, septic, sullage, brine-injection and spear-point water-supply applications.
- Gentle, self-priming flow: smooth, low-shear progressive-cavity pumping with a suction lift up to 6 metres.
- Fluid-matched stators: five elastomer options — nitrile, natural rubber, high nitrile, Hypalon and fluoroelastomer — for chemical compatibility.
- Close-coupled electric drive: supplied with a single- or three-phase motor; single-phase units include a thermal overload.
- Quick to service: rotor and stator replace with basic tools, keeping maintenance downtime low.
- Rated to 80°C: suitable for warm process fluids within the pump’s temperature limit.
Spare Parts List
Ref. = item number on the exploded assembly diagram. Part numbers per Mono CP Range manual MPA514/8 (CP25 ELEC build).
| Select | Qty | Ref. | Part Number | Description | Material / Spec |
|---|---|---|---|---|---|
| 1 | 2200 | RR CP25 2200 | Stator (Nitrile - Standard) | Nitrile rubber | |
| 1 | 2200 | RA CP25 2200 | Stator (Natural Rubber) | Natural rubber | |
| 1 | 2200 | RJ CP25 2200 | Stator (High Nitrile) | High nitrile rubber | |
| 1 | 2200 | RH CP25 2200 | Stator (Hypalon) | Hypalon (CSM) | |
| 1 | 2200 | RV CP25 2200 | Stator (Fluoroelastomer) | Fluoroelastomer (FKM) | |
| 1 | 2500 | SF CP25 2520 | Rotor (316 / HCP - Standard) | 316 stainless, hard chrome plated | |
| 1 | 2500 | SF CP25 2500 | Rotor (316 Stainless) | 316 stainless steel | |
| 1 | 2500 | SF SWP25 2500 | Rotor (Solar) | Solar pump application | |
| 1 | 1050 | RV CP11 1050 | Mechanical Seal (Carbon / Ceramic / Fluoro) | Carbon/ceramic, fluoro elastomer | |
| 1 | 1050 | ST CP11 1050 | Mechanical Seal (Carbon / Stainless Steel) | Carbon/stainless | |
| 1 | 1050 | ZU CP11 1050 | Mechanical Seal (Carbon / Tufnol) | Carbon/Tufnol | |
| 1 | 1050 | TU CP11 1050 | Mechanical Seal (Tungsten) | Tungsten carbide | |
| 1 | 2010 | RR CP11 2010 | O-Ring (Standard) | Nitrile | |
| 1 | 2010 | RV CP11 2010 | O-Ring (Fluoro) | Fluoroelastomer | |
| 1 | 0100 | AC CP11 0100 | Pump Body | Cast (shared CP11/CP25 frame) | |
| 1 | 2400 | AC CP11 2400 | End Cover | Cast | |
| 1 | 4700 | AC CP25 4700 | Stator Support | Cast | |
| 1 | 4200 | RR CP11 4200 | Thrower | Shaft protection disc | |
| 1 | 0400 | OO CP00 0430 | Plug, Nylon (Hex Head 1/4" BSPT) | Fill plug | |
| 1 | 0600 | AL CP25 0611 | Nameplate | - | |
| 8 | P105 | SUN S0547 | Bolt (P105) | Hex head | |
| 4 | P103 | K113260F | Bolt (P103) | Hex head | |
| 4 | P104 | K113220F | Bolt (P104) | Hex head | |
| 8 | P111 | SUN S0545 | Nut (P111) | Hex nut | |
| 16 | P109 | W112051F | Washer (P109) | Flat washer | |
| 16 | P108 | W112251F | Spring Washer (P108) | Lock washer | |
| 2 | — | R104112F | Drive Screw (nameplate) | - | |
| 1 | 0200 | CPE0501CSTFM | Motor 240V Single-Phase | With thermal overload | |
| 1 | 0200 | CPE0503TFM | Motor 415V Three-Phase | - |
OEM part numbers are referenced for identification purposes only. Parts listed suit the Mono CP25 (close-coupled electric) build. Bare-shaft drive components and the OEM mech-seal/O-ring kit are available on request.
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Build | CP25 (close-coupled electric) |
| Pump Type | Progressive cavity (helical rotor / stator) |
| Operating Speed | 1450 RPM standard (800–1500 RPM with frequency controller) |
| Typical Capacity | ~27.7 L/min (365 GPH) at 240 kPa (35 psi) |
| Maximum Suction Lift | 6 metres |
| Maximum Fluid Temperature | 80°C |
| Rotation | Clockwise (viewed from shaft end) |
| Mounting | Horizontal baseplate; suction port horizontal |
| Motor – 240V Single-Phase | CPE0501CSTFM (with thermal overload) |
| Motor – 415V Three-Phase | CPE0503TFM |
Capacity figure is the manual’s rated-duty (pickling-set) value — confirm against your actual duty point. Stator elastomer should be selected for the pumped fluid.
Troubleshooting, Common Faults & Solutions
Motor Will Not Run
Likely Cause: Thermal overload tripped, blown fuse/power failure, motor defect, or faulty pressure switch (pressure system)
Action / Part: Reset thermal overload (red button on capacitor box for single-phase), check electrical supply and fuses, verify pressure switch operation, test motor windings
No Liquid Delivered / Pump Will Not Prime
Likely Cause: Pump not filled before starting, air leak on suction, discharge head too high, suction lift too high, inlet pipe not submerged, or damaged stator/rotor
Action / Part: Fill pump with liquid through plug (OO CP00 0430) adjacent to suction port, check all suction line joints for air leaks, verify suction lift is within 6 metre maximum, ensure inlet pipe adequately submerged, replace stator (RR CP800 2200) and/or rotor (SF CP800 2520) if worn
Not Enough Liquid Delivered
Likely Cause: Air leak on suction, discharge head too high, suction lift too high, inlet pipe not submerged, or viscosity greater than rating
Action / Part: Check all suction connections for air leaks, verify system head within pump rating, reduce suction lift, increase inlet pipe submersion depth, heat product to reduce viscosity if too thick
Loss of Liquid After Starting
Likely Cause: Air or gas in liquid, air leak on suction, insufficient net inlet head, or blocked inlet
Action / Part: Check for air entrainment in pumped liquid, inspect suction line for leaks, increase suction head, clear inlet blockage including foot valve/strainer
Pump is Noisy (Cavitation)
Likely Cause: Air or gas in liquid, blocked foot valve/strainer, restriction in line, or excessive suction lift
Action / Part: Eliminate air entrainment, clean foot valve and strainer, remove restrictions in suction line, reduce suction lift below 6 metre maximum
Pump Vibrates
Likely Cause: Cavitation (see above) or pump not bolted down firmly
Action / Part: Address cavitation issues, secure all pump mounting bolts firmly to baseplate, check support foot (AL CP800 6200) mounting
Pump Will Not Give Rated Pressure
Likely Cause: Worn stator, rotor, or both
Action / Part: Replace stator (RR CP800 2200) and rotor (SF CP800 2520) - always replace together as matched set, check mechanical seal (OO CP800 1060) condition
Motor Runs Hot
Likely Cause: Viscosity greater than rating, voltage/frequency differ from rating, thermal overload set too low, motor defect, or pump overloaded
Action / Part: Note: Motor normally runs too hot to hold. Reduce product viscosity, verify voltage matches motor rating (240V or 415V), adjust thermal overload setting (three-phase), check motor current draw, verify motor (CPE1251CSM for 240V, CPE1253M for 415V)
Thermal Overload Trips Out
Likely Cause: Low voltage, too frequent starting (single-phase), overload set too low (three-phase), pump overloaded, or motor not protected from sun
Action / Part: Verify voltage at motor terminals, reduce start/stop frequency, adjust thermal overload setting, check current draw against motor rating, provide motor shade/ventilation
Pump Starts Too Often (Pressure System)
Likely Cause: Incorrect pressure switch setting, leaking non-return valve, leak in system, pressure tank too small, or air pre-charge too low
Action / Part: Adjust pressure switch cut-in/cut-out settings, replace non-return valve, repair system leaks, install larger pressure tank, check/adjust pressure tank air pre-charge, inspect air bag in pressure tank
Incorrect Rotation (Three-Phase)
Likely Cause: Three-phase wiring incorrect
Action / Part: CRITICAL: Remove pump from motor before checking direction. Running pump in reverse can cause rotor to unscrew from motor shaft causing severe damage. Correct rotation is clockwise viewed from shaft end. If incorrect, swap any two of the three-phase supply wires
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