Robbins & Myers 320-5888-000 Adapter Plate Gasket for Moyno 500 Pumps
This adapter plate gasket closes a static joint in the Moyno 500 400 Series grinder pumps 41502, 42202, 43302 and 44402. It is a single use item: once it has been compressed and taken a set against the mating faces, it will not seal reliably a second time.
Gaskets are the cheapest part in any pump and the one most often reused out of convenience, which is why a rebuilt pump so often weeps from a flange rather than from the shaft. A compressed gasket has already conformed to one particular set of faces in one particular position, and it will not do so again. Fit a new one on every reassembly, clean both faces back to bare metal first, and pull the fasteners down evenly rather than one at a time. It seals the adaptor plate to the pump body, which is the joint opened when the drive end is separated from the motor.
Key Features
- Genuine Robbins & Myers Moyno replacement adapter plate gasket
- Cut for the Moyno 500 400 Series grinder pumps 41502, 42202, 43302 and 44402 joint
- Correct thickness, which on some joints also sets clearance
- Seals the bolted joint without relying on sealant
- Single use item intended for renewal at every reassembly
- Direct replacement, no trimming or modification needed
Applications
- Moyno 500 400 Series grinder pumps 41502, 42202, 43302 and 44402 progressing cavity pumps
- Reassembly after any strip down that opens the joint
- Curing a weep or drip from a bolted flange
- Planned maintenance and spares holding
- Rebuilds following a stator, rotor or seal replacement
- Industrial, marine, dockside and washdown installations
Specifications
- Brand: Robbins & Myers
- Manufacturer: Robbins & Myers (Moyno)
- Manufacturer Part Number: 320-5888-000
- Part Type: Adapter plate gasket, static joint
- Quantity Used: One per joint
- Service: Single use, renew at every reassembly
- Fits: Moyno 500 400 Series grinder pumps 41502, 42202, 43302 and 44402
- Condition: New
Frequently Asked Questions
Q: How tight should the fasteners be?
Even matters more than tight. Pull them down in a crossing pattern in two or three passes, and stop at the point where the gasket is compressed rather than crushed, since over tightening extrudes it and causes the leak it was meant to prevent.
Q: Can it be reused if it still looks perfect?
It will look perfect and still leak. The material has already taken a set against one particular position of one particular pair of faces and cannot conform a second time.
Q: How many should be kept as spares?
Two is a sensible minimum on a pump in regular service, so a torn gasket during a strip down never becomes the reason the pump stays out of service.
Q: Can sealant be used instead of a gasket?
Not on a joint designed around one. The gasket sets a defined thickness as well as sealing, and replacing it with sealant changes the clearance between the parts and can squeeze into passages where it does not belong.
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 adapter plate gasket before you order.
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