

OEM fluid section repair kit restoring sealing performance and chemical resistance in Graco 1590HS-PH diaphragm pumps configured with FK/FK/FK wetted materials.
| Pump Series | Configuration | Application |
|---|---|---|
| Graco 1590HS-PH | FK / FK / FK Material Setup | Chemical processing and industrial fluid transfer systems |
| Graco High-Performance AODD Pumps | Exact OEM configuration match required | Corrosive fluid handling and process-critical applications |
The Graco 25R691 is an OEM fluid section repair kit engineered for the 1590HS-PH air-operated double diaphragm pump platform. It is designed to restore critical internal components responsible for sealing, fluid movement, and pressure regulation in demanding industrial and chemical environments.
The configuration 1590HS-PH --, FK, FK, FK identifies the specific wetted materials used in the pump’s fluid section. The FK designation represents chemically resistant elastomer and sealing materials selected for aggressive or corrosive fluid applications, requiring exact configuration matching for safe and reliable operation.
This kit is intended exclusively for Graco 1590HS-PH pumps configured with FK / FK / FK wetted materials. Verification of the pump nameplate is required before installation to ensure correct chemical compatibility and performance reliability.