Graco 15A183 Diaphragm – OEM Regulator Seal
The Graco 15A183 Diaphragm is a precision-engineered, flexible seal designed for use in Graco pneumatic regulator assemblies. It delivers reliable performance by maintaining a tight barrier that isolates internal valve components while enabling consistent pressure regulation.
Product Overview
This diaphragm is crafted from high-grade elastomer designed to handle repeated flexing and high‑cycle stress. It provides a resilient, fatigue-resistant surface that helps to prevent leaks and ensures long-term, dependable regulator function. Being a genuine Graco part, the 15A183 adheres to strict quality standards and pairs perfectly with its intended regulator systems.
Key Features
- OEM Graco part — Part Number: 15A183
- Highly flexible membrane built for high-cycle durability
- Maintains a robust seal under varying pressure conditions
- Resists cracking, thinning, and deformation over time
- Essential for pneumatic regulator assemblies that demand a reliable diaphragm
Technical Specifications
| Part Number |
15A183 |
| Description |
Diaphragm / Seal for Pneumatic Regulator |
| Application |
Pneumatic regulator assemblies (e.g., Graco 233770, 234271) |
| Material Behavior |
Flexible and fatigue-resistant elastomer |
| Approximate Weight |
~0.06 lb |
Compatible Systems
- Graco Pneumatic Regulators (such as part 233770)
- Other Graco self-relieving regulators that use a diaphragm seal
Installation
To install the Graco 15A183 Diaphragm, follow these steps:
- Depressurize the regulator fully before disassembling.
- Remove the diaphragm housing or cover carefully.
- Take out the old diaphragm and check for signs of wear or distortion.
- Place the new 15A183 diaphragm, ensuring it lies flat and aligned.
- Reassemble the housing, keeping internal parts aligned.
- Slowly re-pressurize the system and test for proper sealing and operation.
Maintenance Advice
- Inspect the diaphragm during regular maintenance or whenever regulator performance changes.
- Look for fatigue, cracks, or thinning areas.
- Replace immediately if any damage is found to avoid leaks or regulator failure.
- When reassembling, torque all fasteners to Graco’s recommended specifications.
Frequently Asked Questions
It works as a flexible seal inside the pneumatic regulator, isolating internal parts from fluid or air and enabling controlled pressure regulation.
Yes, the 15A183 diaphragm is an OEM Graco part specifically designed for use in compatible pneumatic regulators.
It is used in certain Graco pneumatic regulators such as part number 233770 and similar assemblies.
Inspect it during routine maintenance or if you notice any change in regulator behavior. Replace the diaphragm if you find any cracks or wear to maintain system integrity.
