Pump Rotor and Stator for MONO Progressive Cavity Pump Replacement

The core wear pair — In a MONO-type progressing cavity pump the rotor is a single helical screw that rotates inside a stator whose bore is lined with an elastomer. The rotor and the stator liner form a sealing line that traps fluid and moves it toward the discharge. Because this contact pair does the actual pumping, it is normally the first thing to wear and the part most often reordered.

How a replacement rotor and stator are made — For a made-to-order or replacement set supplied to suit a MONO-type pump, the usual steps are:

1. Identify the pump — model / size, number of stages, and the duty fluid and temperature.
2. Check the worn part — measure the rotor or read the stator compound code where it is marked, and note the helix type (single or double start).
3. Choose the liner compound — matched to the fluid (see Material), since the wrong rubber shortens life more than anything else.
4. Build the rotor — steel stock is turned and ground to the helical profile, then given a wear-resistant surface such as hard chrome.
5. Build the stator — the casing is prepared and the elastomer is formed and bonded to the bore in the correct profile.
6. Verify and pair — profile and dimensions are checked, and rotor and stator are supplied as a matched set where the job calls for it.

Brand note: MONO is referenced here for identification and compatibility purposes only. We are not affiliated with, authorised by, or endorsed by the original manufacturer.

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We have a series of professional technologies and product brands that can provide you with leading technical services, sales support and product supporting solutions - empowering you with pumps, frequency converters, servo drives, PLC servo drives HMI, industrial control cabinets, motors, Reduced motors, mechanical seals and systems, couplings, gearboxes and engineering solutions (overseas on-site service of 3D scanning reverse molding of pump replacement parts to your satisfaction, and on-site equipment debugging services by overseas dispatched engineers).

For a rotor and stator set, packing is arranged by part:

• Rotor — wrapped and cushioned so the ground helical surface is not knocked or corroded in transit.
• Stator — kept from being squeezed or bent, since a damaged liner promptly loses its seal line.
• Larger parts — wooden crate suitable for sea freight as needed.
• Custom packing — we can follow a customer's specified packing requirement.

Transport mode is chosen by size, weight, and required lead time: express, sea freight, air shipping, land transport, or post.