Moyno® 344 Pump Parts
OEM-compatible replacement components and part-number cross-references for supported Moyno® 344 progressive cavity pumps.
ACCA Pumps organizes 344 rotors, stators, flexible joints, drive shafts, bearings, sealing components and service hardware using the OEM 500 Series service structure.
344 Engineering Overview
The 344 is part of the Moyno® 500 Series 300-model family. It uses a flexible joint to transmit torque between the drive shaft and rotor while accommodating eccentric rotor motion. Model 34411 is a packing-gland configuration. The service manual specifies four 3/16-inch square packing rings and grease lubrication during assembly.
Flexible-Joint Drive
Inspect the shaft, flexible joint and rotor together during overhaul because wear in one component can affect adjacent drive-train parts.
Model Identification
Use the complete model suffix and serial number. Material and sealing variations can change the applicable OEM part number.
Rotor & Stator Selection
The 344 uses model-specific rotor and stator part numbers listed in the OEM service documentation.
344 Engineering Data
| Engineering Data | Specification |
|---|---|
| Pump Family | Moyno® 500 Series |
| Base Model | 344 |
| Joint Design | Flexible joint |
| Suction Port | 3/4 in NPT (1 in NPT on 08 version) |
| Discharge Port | 3/4 in NPT |
| Maximum Discharge Pressure | 40 PSI |
| Maximum Speed | 1750 RPM |
| Stator Elastomers Listed | NBR, EPDM, FPM |
| Nylon Configurations | Excluded from ACCA 500 Series catalog |
Moyno 344 Replacement Parts Reference
ACCA part numbers use the OEM part number with an A- prefix. The table preserves model and material distinctions from the OEM service documentation; nylon-specific components are omitted.
| Ref. | Component Description | ACCA Part Number | OEM Part Number | Notes / Applicable Types |
|---|---|---|---|---|
| 1 | Pump Body – Cast Iron | A-330-1065-002 | 330-1065-002 | 344 family |
| 1 | Pump Body – 316 Stainless Steel | A-330-1910-002 | 330-1910-002 | 344 family |
| 1 | Pump Body – Packing Gland Model | A-340-1000-001 | 340-1000-001 | 344 family |
| 1A | Discharge Housing | A-340-2362-000 | 340-2362-000 | 344 family |
| 1B | Bearing Housing | A-330-4587-000 | 330-4587-000 | 344 family |
| 1C | Pump Base | A-340-2369-000 | 340-2369-000 | 344 family |
| 2 | Suction Housing – Cast Iron | A-330-1064-002 | 330-1064-002 | 344 family |
| 2 | Suction Housing – 316 Stainless Steel | A-330-1911-002 | 330-1911-002 | 344 family |
| 21 | Stator – NBR | A-340-3504-120 | 340-3504-120 | 344 family |
| 21 | Stator – EPDM | A-340-3504-320 | 340-3504-320 | 344 family |
| 21 | Stator – FPM | A-340-3504-520 | 340-3504-520 | 344 family |
| 22 | Rotor – 416 Stainless Steel | A-320-1841-000 | 320-1841-000 | 344 family |
| 22 | Rotor – 316 Stainless Steel | A-320-2934-000 | 320-2934-000 | 344 family |
| 24 | Flexible Joint – Carbon Steel / NBR | A-320-1511-000 | 320-1511-000 | 344 family |
| 24 | Flexible Joint – 316 SS / NBR | A-320-3759-000 | 320-3759-000 | 344 family |
| 24 | Flexible Joint – 316 SS / EPDM | A-320-6367-000 | 320-6367-000 | 344 family |
| 24 | Flexible Joint – 316 SS / FPM | A-320-4670-000 | 320-4670-000 | 344 family |
| 26 | Drive Shaft – 416 Stainless Steel | A-320-1499-000 | 320-1499-000 | 344 family |
| 26 | Drive Shaft – 316 Stainless Steel | A-320-2938-000 | 320-2938-000 | 344 family |
| 26 | Drive Shaft – Packing Model 34411 | A-320-2448-000 | 320-2448-000 | 344 family |
| 29 | Bearing (2 required) | A-630-0502-031 | 630-0502-031 | 344 family |
| 33 | Bearing Spacer | A-320-1900-000 | 320-1900-000 | 344 family |
| 41 | Packing Gland | A-320-0101-004 | 320-0101-004 | 34411 packing model |
| 42 | Packing | A-340-3396-005 | 340-3396-005 | 34411 packing model |
| 47 | Gland Bolt | A-619-1520-161 | 619-1520-161 | 34411 packing model |
| 66 | Snap Ring | A-320-1506-000 | 320-1506-000 | 344 family |
| 66A | Shaft Snap Ring | A-320-4182000 | 320-4182000 | 344 family |
| 69 | Mechanical Seal – NBR | A-320-2424-000 | 320-2424-000 | 344 elastomer option |
| 69 | Mechanical Seal – EPDM | A-320-6379-000 | 320-6379-000 | 344 elastomer option |
| 69 | Mechanical Seal – FPM | A-320-6501-000 | 320-6501-000 | 344 elastomer option |
| 77 | Slinger Ring | A-320-6382-000 | 320-6382-000 | 344 family |
| 77 | Slinger Ring – Packing Configuration | A-320-6384-000 | 320-6384-000 | 344 family |
| 100 | Pipe Plug (3 required) | A-610-0120-021 | 610-0120-021 | 344 family |
| 112 | Screws (8 required) | A-619-1430-103 | 619-1430-103 | 344 family |
| 112 | Screws – Stainless Configuration | A-320-5968-000 | 320-5968-000 | 344 family |
| 112 | Screws – Packing Configuration | A-619-1430-103 | 619-1430-103 | 344 family |
| 112C | Screws (4 required) | A-619-0890-281 | 619-0890-281 | 344 family |
| 215 | Lock Washer (8 required) | A-320-6464-000 | 320-6464-000 | 344 family |
| KIT | Elastomer Repair / Conversion Kit – NBR | A-311-9031-000 | 311-9031-000 | 344 |
| KIT | Elastomer Repair / Conversion Kit – EPDM | A-311-9030-000 | 311-9030-000 | 344 |
| KIT | Elastomer Repair / Conversion Kit – FPM | A-311-9057-000 | 311-9057-000 | 344 |
344 Repair and Conversion Kits
| Configuration / Elastomer | ACCA Kit Number | OEM Kit Number |
|---|---|---|
| NBR | A-311-9031-000 | 311-9031-000 |
| EPDM | A-311-9030-000 | 311-9030-000 |
| FPM | A-311-9057-000 | 311-9057-000 |
500 Series Internal Construction
Service as an Assembly
During overhaul, inspect the rotor, stator, flexible joint, shaft, bearings and sealing components for coordinated wear.
Related 500 Series Models
Need Help Identifying Moyno 344 Parts?
Send the complete pump model, serial number and OEM part number when available.
Trademark Disclaimer: Moyno® is a registered trademark of its respective owner. References are used solely to identify compatible equipment and replacement applications. ACCA Pumps is an independent aftermarket manufacturer and is not affiliated with or endorsed by the trademark owner.
Complete 344 Replacement Pump
If the application requires a complete pump rather than individual components, review the Moyno 344 compatible replacement pump from ACCA Pumps.
Complete 344 Replacement Pump
If the application requires a complete pump rather than individual replacement parts, review the Moyno 344 compatible replacement pump from ACCA Pumps.