Micropump 81281 Pumphead
Micropump 81281 GB-P25.PVS.A-B1 magnetic drive gear pumphead with PPS gears, 316 stainless steel housing, Viton seals, 0.58 mL/rev displacement and internal bypass.
The Micropump 81281 GB-P25.PVS.A-B1 Magnetic Drive Gear Pumphead is a GB Series suction-shoe pump end designed for precise and smooth fluid delivery. This configuration includes an internal bypass and is built for compatible A-Mount magnetic-drive systems.
The 81281 combines PPS carbon-fiber/PTFE-filled gears, a 316 stainless-steel base and shaft, and Viton static seals. Its suction-shoe technology helps compensate for wear and reduce internal slip during operation.
Micropump 81281 Specifications
- Manufacturer: Micropump
- Part Number: 81281
- Model: GB-P25.PVS.A-B1
- Series: GB
- Product Type: Magnetic Drive Gear Pumphead
- Design: Suction-Shoe with Internal Bypass
- Gear Material: PPS, Carbon Fiber / PTFE Filled
- Base Material: 316 Stainless Steel
- Shaft Material: 316 Stainless Steel
- Static Seal: Viton
- Displacement: Approximately 0.58 mL/rev
- Inlet: 1/8-27 FNPT Side Port
- Outlet: 1/8-27 FNPT Side Port
- Minimum Speed: Approximately 500 RPM
- Maximum Speed: Approximately 5500 RPM
- Maximum System Pressure: 300 PSI
- Maximum Differential Pressure: 75 PSI
- Maximum Temperature: Approximately 350°F depending on operating configuration
- Bypass: Internal Bypass
Key Features
- Suction-shoe magnetic drive gear-pump design
- Internal bypass configuration
- PPS carbon-fiber/PTFE gear material
- 316 stainless-steel base and shaft
- Viton static sealing
- 0.58 mL/rev displacement class
- Compact A-Mount pumphead architecture
- 300 PSI maximum system-pressure rating
Typical Applications
The GB Series is used for compatible chemical transfer, precision dosing, analytical instruments, industrial process equipment, laboratory systems and OEM fluid-control applications.
Pumphead vs Complete Pump
81281 is a pumphead and does not include the external motor drive. A compatible A-Mount drive is required for operation.
Replacement and Operating Notes
Verify the need for the internal-bypass configuration before replacing an existing pumphead. Other GB-P25 variants without the B1 bypass or with different gear and seal materials use different part numbers.
Always confirm fluid compatibility, system pressure, differential pressure, viscosity, speed and temperature before installation.
| Brand | Micropump |
|---|---|
| Product Type | Pump |
| Notes | GB-P25.PVS.A-B1 Pumphead Internal Bypass, Carbon Fiber/PTFE Gears, Viton Static Seal, (No Motor) |
| Micropump Series | GB |
