Graco 15B729 Coupling
$57.77
$63.00
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The Graco 15B729 Coupling is a high-pressure OEM replacement designed for secure connections in plural-component spray systems. Key features include:
- 3/8-18 NPSM × 3/8-18 NPT connection
- High-strength stainless steel construction
- Supports up to 7,250 psi operating pressure
- Compatible with Graco XM series mixing tubes and manifolds
- Leak-resistant and durable for long-term use
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Graco 15B729 Coupling – High‑Pressure Adapter
The Graco 15B729 Coupling is a robust, OEM-grade fluid adapter engineered for plural‑component and high‑pressure spray systems. Designed to maintain integrity under extreme operating conditions, it provides a reliable seal and connection between mixing tubes and manifolds.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| Part Number | 15B729 |
| Connection Type | 3/8‑18 NPSM (male) × 3/8‑18 NPT (female) |
| Maximum Operating Pressure | 50 MPa (500 bar / 7,250 psi) |
| Maximum Fluid Temperature | 71 °C (160 °F) per Graco spec sheets |
| Material / Wetted Parts | Stainless steel (302/303), PTFE, tungsten carbides, and electroless nickel / other compatible materials per Graco mixing‑tube design |
| Mass / Size | ~ 0.15 lb; dimensions ~ 0.9 in × 1.6 in × 0.95 in per parts‑supplier listing |
| OEM Application | Used in Graco XM plural‑component sprayers (for example, in Graco parts manual) |
Features & Benefits
- High‑pressure rating - Supports up to 7,250 psi fluid pressure, ensuring safe operation in plural‑component systems.
- Secure connection - The 3/8 NPSM × 3/8 NPT configuration provides a tight, leak‑resistant seal.
- Durable construction - Crafted from stainless steel and engineered for long-lasting performance under aggressive fluid conditions.
- OEM compatibility - Designed specifically for Graco plural‑component mixers and manifolds, ensuring proper fit and performance.
- Corrosion-resistant materials - Wetted parts are built with corrosion-resistant metals and PTFE to handle a variety of coating materials.
Applications & Usage
The 15B729 coupling is commonly used in Graco’s high-pressure plural-component systems, especially for mixing tubes, inlets, and manifolds. It ensures a strong, leak-free interface in systems that handle abrasive or reactive coating materials. It is typically found in:
- Graco XM series plural‑component sprayers
- Mixing manifold assemblies
- High-pressure fluid supply lines in two‑component (2K) systems
- Service and repair kits for Graco mixing equipment
Frequently Asked Questions
The coupling is rated for a maximum operating pressure of 50 MPa (500 bar / 7,250 psi), making it suitable for high‑pressure plural‑component systems.
It uses a 3/8‑18 NPSM male thread on one side and a 3/8‑18 NPT female thread on the other, common in Graco mixing inlet assemblies.
No — the 15B729 is a specific coupling designed for a 3/8‑18 NPSM × 3/8‑18 NPT connection. Different part numbers like Graco 162024 are designed for different thread configurations.
The wetted parts include stainless steel (grades 302/303), PTFE, and tungsten carbide, making it suitable for harsh or chemically aggressive coating materials.
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