Graco 15A191 Upper Housing – OEM Regulator Cap Body
The Graco 15A191 Upper Housing is a precision-engineered OEM component that forms the top enclosure of Graco pneumatic regulator assemblies, securely housing internal parts such as the diaphragm, spring, and valve mechanisms.
Product Overview
This upper housing is manufactured from durable metal to endure high-pressure cycling while maintaining structural integrity. It provides a stable, rigid cap for the regulator, ensuring internal components remain properly aligned, which is vital for consistent pressure regulation and long-term reliability.
Key Features
- Genuine Graco OEM part — Part Number: 15A191
- Rugged metal construction for long-term durability
- Secures diaphragm, spring, and internal valve components in place
- Designed for repeated pressure cycling without deformation
- Maintains precision alignment for optimal sealing and regulator performance
Technical Specifications
| Part Number |
15A191 |
| Description |
Upper Housing / Cap Body |
| Material |
High-strength cast or machined metal alloy |
| Approximate Weight |
~0.67 lb |
| Application |
Pneumatic regulator assemblies (e.g. part of Graco regulator model series) |
Compatible Systems
- Graco pneumatic regulators, including models such as 233760, 233769, and 233810 (as indicated in Graco parts diagrams)
- Other Graco pressure control assemblies that use the upper housing as a structural cap
Installation
To install the Graco 15A191 Upper Housing:
- Ensure the regulator is fully depressurized before removing the old housing.
- Remove screws or fasteners securing the existing upper housing.
- Lift off the housing carefully, taking care not to disturb the diaphragm or spring.
- Inspect internal components (spring, diaphragm, valve) for wear or damage.
- Place the new 15A191 housing in position, aligning mounting holes precisely.
- Reinstall fasteners and torque to the manufacturer’s recommended specification.
- Repressurize the regulator slowly and perform a leak and function test.
Maintenance Recommendations
- Inspect the upper housing during regular maintenance for cracks or deformation.
- Ensure that the mating surfaces for the diaphragm and spring remain clean.
- Replace the housing if structural damage is detected, to prevent regulator failures.
- Use correct torque values on reassembly to avoid warping or over-stressing the housing.
Frequently Asked Questions
It acts as the structural cap for the regulator, holding the diaphragm, spring, and other internal components in place with stability.
Yes, the 15A191 Upper Housing is a factory OEM Graco part, designed for use in Graco pneumatic regulators.
It is used in various Graco pneumatic regulator models, including those in the 233760, 233769, and 233810 series.
Yes — if the housing is free of cracks, deformation, or corrosion, it may be reused. Always inspect carefully before reuse.
