Graco 15C303 Regulator Lower Housing
The Graco 15C303 Regulator Lower Housing is the core structural component for Graco fluid‑pressure regulators. Crafted to support internal regulator mechanisms—such as the diaphragm, valve seat, plugs, and springs—the 15C303 ensures precise pressure control and dependable performance under demanding conditions.
Compatible Machines
- Graco fluid‑pressure regulators requiring a lower housing variant
- Graco high‑precision coating and dispensing systems utilizing regulator assemblies
- Graco industrial finishing equipment where pressure regulation is critical
Key Features
- Precision‑machined housing bore to align regulator internals with minimal play
- Heavy‑duty metal construction to withstand high fluid pressures and cyclic loads
- Multiple porting and threaded access plugs for flexible system integration
- Corrosion‑resistant finish to protect against harsh fluids and environments
- Designed for serviceability–easy removal and access to internal regulator components
Benefits
- Provides a reliable base for the entire regulator mechanism, promoting consistent regulation of fluid pressure
- Extends equipment life by protecting internal components and maintaining alignment under load
- Enhances ease of maintenance with quick access to seals and internals when servicing the regulator
- Supports system integrity by ensuring leak‑free sealing surfaces and robust construction
Technical Specifications
| Part Number |
15C303 |
| Type |
Regulator Lower Housing |
| Material |
Metal alloy (precision machined) |
| Function |
Base housing for pressure‑regulating mechanism |
| Installation |
Mount as part of regulator assembly; fit seals and internals accordingly |
| Use Case |
Replacement housing in Graco regulator assemblies subject to service or damage |
Installation Tips
- Clean all mating surfaces thoroughly before assembly to ensure proper sealing.
- Inspect internal components (diaphragm, valves, O‑rings) when housing is removed and replace as needed.
- Torque all fasteners to the manufacturer‑recommended values to avoid warping or leaks.
- Ensure the housing is aligned correctly with the regulator body and ports to prevent misfit and malfunction.
Why Choose the 15C303?
The 15C303 Regulator Lower Housing is a vital replacement part for maintaining the integrity and performance of Graco regulator systems. Whether rebuilding a regulator or repairing damage, this housing delivers the precision, durability, and serviceability required in high‑performance fluid control applications.
Frequently Asked Questions
If the regulator is leaking, the sealing surfaces are damaged, or the housing is cracked or warped, replacement of the lower housing is recommended.
It depends on condition—while the housing can be replaced independently, it’s good practice to inspect and replace seals and diaphragms concurrently for optimal performance.
Compatibility depends on the specific regulator series. Always refer to your parts diagram or service manual to ensure that the 15C303 housing is listed for your regulator model.
