Robbins & Myers 311-9062-000 EPDM Stator and Seal Kit for Moyno 500 Model 205
The 311-9062-000 is the EPDM stator and seal kit for the Moyno 500 205 Models, covering 20501 and 20502. It gathers the parts that actually wear in a progressing cavity pump into one package: stator and shaft seal. Buying them together means the pump goes back together with every soft part renewed rather than with a new stator running against tired hardware.
A conversion kit is also the usual way to move a pump onto a different liquid. Elastomer compatibility rather than mechanical wear is what limits many installations, and changing the soft parts is far cheaper than changing the pump. EPDM covers an approximate range of 10 to 210 F in service. Check the rotor condition while the pump is open, because a rotor with worn plating will abrade the new stator quickly and is not included in a kit of this type. The 205 pumps run a phenolic or 316 stainless rotor that is not part of this kit and is ordered separately if it is worn.
Key Features
- Genuine Robbins & Myers Moyno stator and seal kit
- Contains the stator and shaft seal
- EPDM elastomer throughout
- Matched to the Moyno 500 205 Models, covering 20501 and 20502
- Approximate elastomer service range of 10 to 210 F
- Suits both a wear overhaul and an elastomer conversion
- Direct replacement parts, no modification required
Applications
- Moyno 500 205 Models, covering 20501 and 20502 progressing cavity pumps
- Full wet end overhaul of a pump that has lost pressure and flow
- Converting a pump to a different elastomer for a new liquid
- Rebuilding after a dry running incident
- Planned maintenance on metering and transfer duties
- Industrial, marine, dockside and washdown installations
Specifications
- Brand: Robbins & Myers
- Manufacturer: Robbins & Myers (Moyno)
- Manufacturer Part Number: 311-9062-000
- Part Type: Pump repair and conversion kit
- Kit Contents: stator and shaft seal
- Material: EPDM
- Elastomer Service Range: approximately 10 to 210 F
- Fits: Moyno 500 205 Models, covering 20501 and 20502
- Condition: New
- Kit Components: Stator 330-6381-320, mechanical seal 320-6497-000
Frequently Asked Questions
Q: Can this kit be used to change the elastomer on a pump that is not worn out?
Yes, that is one of its intended uses. If the liquid has changed and the existing compound is not suited to it, converting the soft parts is far cheaper than replacing the pump.
Q: What should be inspected while the pump is apart?
The rotor surface, the bearings for roughness, the shaft for a groove where the seal ran, and the housing bore for scoring. All four are quick to check and all four affect how long the new parts last.
Q: Is there anything to do differently on first start up after a rebuild?
Flood the wet end before starting so the new stator and seal are never run dry, confirm the direction of rotation, and run against an open discharge for the first minute before loading the pump.
Q: Does the kit include the rotor?
No. Kits of this type cover the soft parts and the drive components listed, not the rotor. The rotor is ordered separately when inspection shows worn plating, scoring or flatted crests on the helix.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct stator and seal kit before you order.
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