Graco 15A198 Lower Housing – OEM Regulator Base
The Graco 15A198 Lower Housing serves as the foundation of the Graco pneumatic regulator assembly, providing a robust and precisely machined chamber to support internal components such as springs, diaphragms, and valve mechanisms.
Product Overview
This housing is engineered for durability and longevity under high-pressure conditions. Built from high-grade metal, it ensures structural stability and precise alignment of all internal parts. The 15A198 lower housing is designed to maintain regulator performance over millions of cycles, keeping the regulator’s internal geometry intact and minimizing the risk of leaks or misalignment.
Key Features
- Genuine Graco OEM component — Part Number: 15A198
- High-strength metal construction resists wear and deformation
- Precision machined to maintain internal alignment under pressure
- Provides a stable mounting base for the diaphragm, springs, and valve internals
- Designed to withstand repeated pressure cycling without fatigue
Technical Specifications
| Part Number |
15A198 |
| Description |
Lower Housing / Base of Regulator |
| Material |
High-strength cast or machined metal alloy |
| Application |
Pneumatic regulator assemblies |
| Approximate Weight |
~2.8 lb |
Compatible Systems
- Graco pneumatic regulators (e.g., models in series 233760, 233769, 233770)
- Regulator setups used in finishing sprayers and fluid control systems
Installation
To install the Graco 15A198 Lower Housing correctly:
- Depressurize and drain the regulator before disassembly.
- Remove the existing lower housing carefully, noting the positioning of internal parts.
- Clean the housing cavity to remove old seals, debris, or corrosion.
- Reinsert internal components (spring, diaphragm, valve) into the new housing, ensuring correct orientation.
- Align and secure the upper housing / cap onto the lower housing with proper torque on fasteners.
- Repressurize the regulator slowly and perform a functional test for leaks and proper operation.
Maintenance Tips
- Inspect the lower housing during regular servicing for cracks or signs of wear.
- Check the seating surfaces and seal grooves for corrosion or damage.
- Replace the housing if deformation or leaks are detected; do not attempt to reuse cracked housing.
- When reassembling, use recommended torque values to avoid stressing the housing.
Frequently Asked Questions
It provides a solid base and precise alignment for springs, diaphragms, and valves – ensuring internal components function correctly under pressure.
Yes – the 15A198 Lower Housing is a factory OEM component, built to Graco’s precise standards.
It is designed for use in a variety of Graco pneumatic regulators, including models in the 233760, 233769, and 233770 series.
Only if it shows no signs of wear, cracks, or distortion. Otherwise, replacement is recommended to maintain regulatory integrity.
