Gorman-Rupp 02501-247 F-031 Bellows Module Assembly for 16001-144 Compact Metering Pumps
The Gorman-Rupp 02501-247 is the complete two-inch bellows module assembly — factory designation F-031, built with EPT/EPDM elastomers — that forms the entire fluid-handling end of a 16001-144 compact bellows metering pump. Everything the pumped fluid touches lives in this module: the molded bellows itself, the poppet check valves that set flow direction, the seals, and the polypropylene body and connectors. Because the module carries the whole wetted path, replacing it restores a worn or chemically attacked pump to original metering accuracy without pulling the motor, the crank mechanism, or the frame out of service.
Bellows pumps in the 16001 family work by squeezing and relaxing a molded bellows through an adjustable crank, moving fluid between two check valves. There are no dynamic seals, no packing, and no rotating element in contact with the liquid, which is why these pumps are trusted with aggressive photographic chemistry, deionized water, dilute acids and caustics, detergents, and fine slurries that would destroy a conventional gear or diaphragm head. The all-plastic construction and EPDM elastomer package in the 02501-247 give broad compatibility with water-based and oxidizing chemistries, while the self-priming action lets the module pull from a drum or tank below the pump without a foot valve in most installations.
A single 16001 drive can carry as many as four independent modules, each set to its own stroke length and each running out of phase with the others, so proportioning several chemistries from one motor is routine. That also means a module can be swapped or re-elastomered on its own when one leg of a dosing system changes duty. Keeping a spare 02501-247 on the shelf is inexpensive insurance for film and X-ray processors, silver recovery units, wafer washers, analytical instruments, and chemical dispensing equipment where an unplanned stop costs far more than the module does.
Key Features
- Complete drop-in bellows module assembly — restores the full wetted path of the pump in one part
- Factory designation F-031, 2 in. nominal bellows size, EPT/EPDM elastomer package
- Molded polypropylene body and connectors for broad chemical resistance
- EPDM poppet check valves handle clean fluids and fine slurries
- No dynamic seals, no packing, no rotating wetted parts — nothing to leak or score
- Self-priming operation; holds prime between cycles
- Stroke-adjustable metering with repeatable volumetric output
- Runs independently when multiple modules share one drive, allowing true proportioning
- Serviceable in place — module changes without removing motor or drive assembly
- Corrosion-resistant spring-loaded valve design for consistent seating
Applications
- Photographic, X-ray, and dental film processing equipment
- Silver recovery and fixer replenishment systems
- Semiconductor wafer washers and wet-bench processing
- Laboratory, analytical, and blood-analysis instrumentation
- Detergent, sanitizer, and cleaning chemical dispensing
- Water and wastewater treatment chemical dosing
- Floor scrubbers and industrial cleaning machines
- Printing, plating, and photo-chemical process lines
- Thermal therapy and medical fluid circulation equipment
- OEM chemical injection and proportioning skids
Specifications
- Part Number: 02501-247
- Factory Designation: F-031 Module Kit
- Type: Bellows module assembly / pump wet-end kit
- Fits Pump Model: Gorman-Rupp Industries 16001-144 compact bellows metering pump
- Bellows Nominal Size: 2 in.
- Port Size / Connection: 2 in. module barbed tubing connectors, polypropylene
- Elastomer Material: EPT / EPDM
- Body and Connector Material: Polypropylene
- Valve Type: Poppet check valves, spring-loaded
- Valve Spring Material: Corrosion-resistant alloy
- Pump Action: Positive displacement, reciprocating bellows
- Maximum Discharge Pressure: 5 psi (16001 series duty)
- Maximum Fluid Temperature: 140°F (60°C)
- Maximum Fluid Viscosity: 5,000 centistokes
- Priming: Self-priming
- Stroke: Adjustable, proportional metering output
- Modules Per Drive: Up to four independent modules on a single 16001 motor
- Dynamic Seals: None
- Service Note: Reduce pressure rating for sustained fluid temperatures above 120°F
Frequently Asked Questions
Q: Does the 02501-247 include the bellows itself, or only the seals?
A: It is a complete module assembly, not a seal-only kit. The molded bellows, poppet valves, seals, and polypropylene module body all come together as one serviceable unit.
Q: Can I install this module without taking the pump off its mounting?
A: Yes. The module is designed to be removed and replaced from the wet end while the motor, crank mechanism, and mounting stay in place, which is what keeps changeover time short on production equipment.
Q: What does the EPT designation in the part description mean?
A: EPT is Gorman-Rupp's shorthand for the EPDM elastomer package. It signals that the poppets and seals in this module are EPDM rather than fluoroelastomer, hypalon, or a fluoropolymer option.
Q: Will this module meter a different volume than the one it replaces?
A: No. Output is set by bellows size and the stroke adjustment on the drive, so a like-for-like module change returns the pump to its original metering range once the stroke setting is unchanged.
Q: Is EPDM the right elastomer for my fluid?
A: EPDM suits water-based chemistry, photographic solutions, many dilute acids and caustics, and oxidizers, but it is a poor choice for petroleum oils, fuels, and many solvents. Those duties call for one of the alternate elastomer modules in the same size rather than the 02501-247.
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