DELPHI FITTINGS
Part Number: 6902-SS
SAE ORB Male x NPSM Pipe Female Swivel 45° Elbow (Stainless Steel)
Product Overview
The Delphi Fittings Part 6902-SS is a 45° elbow adapter, expertly manufactured from high-grade stainless steel (typically Grade 316 SS). This specialized fitting is designed to create a secure, 45-degree angled connection between a component featuring a male SAE O-Ring Boss (ORB) port and a male NPSM (National Pipe Straight Mechanical) threaded pipe or fitting. It incorporates a male SAE O-Ring Boss thread with an O-ring groove on one end and a female NPSM pipe thread with an integrated swivel nut on the other. The NPSM swivel end is crucial for simplifying installation by allowing easy alignment without twisting the mating component or attached hose. The superior corrosion resistance of stainless steel makes this elbow an ideal solution for demanding applications in marine environments, chemical processing, food and beverage industries, or any system where material integrity and longevity are paramount.
Key Features & Specifications
| Material | High-Grade Stainless Steel (Typically 316 SS for optimal corrosion resistance) |
|---|---|
| End 1 Configuration | Male SAE O-Ring Boss (ORB) (conforming to SAE J1926-1 / ISO 11926-1) |
| End 2 Configuration | Female NPSM Pipe Swivel (National Pipe Straight Mechanical) (threads conforming to ANSI/ASME B1.20.1) |
| Angle | 45 Degrees |
| Body Style | Elbow Adapter with hexagonal (hex) features for secure wrench engagement. |
| Sealing Mechanism | ORB End: Utilizes an elastomeric O-ring (Viton® recommended for stainless steel) which seals effectively against the chamfered boss of the mating female ORB port, providing a high-integrity, leak-proof seal. NPSM Female Swivel End: NPSM threads are straight and are not designed to provide a pressure seal on the threads themselves. Sealing is typically achieved by mechanical means, often with the NPSM female swivel's 30° seat compressing against a corresponding 30° seat on the male NPSM fitting. The swivel nut facilitates tightening without rotating the elbow body or mating component. |
| Corrosion Protection | Inherent to the stainless steel material; typically passivated to enhance surface integrity and corrosion resistance. |
| Primary Function | To provide a 45-degree, leak-proof connection between a male SAE ORB port and a male NPSM pipe or fitting, offering the superior durability and corrosion resistance of stainless steel along with the installation convenience of a swivel nut. |
| Working Pressure | Suitable for hydraulic systems. Specific pressure ratings are dependent on the size of the fitting, the integrity of the NPSM mechanical seal, and the particular application conditions. |
| O-Ring Material (for ORB end) | Viton® (FKM) is strongly recommended for stainless steel applications to ensure compatibility with a wide range of aggressive fluids and extreme temperatures. The O-ring is typically supplied with the fitting. |
Commonly Available Sizes (Part #6902-SS Series)
Delphi Fittings offers the 6902-SS Stainless Steel ORB Male to NPSM Female Swivel 45° Elbow in various common size combinations. Sizes are generally denoted by ORB dash numbers and NPSM nominal pipe sizes.
Examples include (Male ORB x Female NPSM Swivel):
- 6902-04-04-SS: -04 (7/16-20 UNF) ORB Male x 1/4" NPSM Female Swivel
- 6902-06-06-SS: -06 (9/16-18 UNF) ORB Male x 3/8" NPSM Female Swivel
- 6902-08-08-SS: -08 (3/4-16 UNF) ORB Male x 1/2" NPSM Female Swivel
- 6902-12-12-SS: -12 (1-1/16-12 UNF) ORB Male x 3/4" NPSM Female Swivel
- 6902-16-16-SS: -16 (1-5/16-12 UNF) ORB Male x 1" NPSM Female Swivel
Note: Each ORB male end includes an appropriate O-ring (Viton® recommended for stainless steel). The NPSM female swivel end is designed to seal effectively with a standard male NPSM fitting, typically featuring a 30° seat; ensure mating part design is compatible for optimal sealing. For unlisted size combinations, specific material grade requirements (e.g., 316L), or other custom needs, please contact our sales team.
Applications
The Part 6902-SS Stainless Steel 45° Elbow is essential for:
- Connecting components with male SAE O-Ring Boss (ORB) ports to male NPSM (National Pipe Straight Mechanical) threaded pipes or fittings at a 45-degree angle, especially within stainless steel hydraulic systems or those exposed to corrosive elements.
- Optimizing hydraulic line routing where a 45-degree turn is preferable to a 90-degree bend, and where the swivel feature simplifies installation in confined spaces or complex assemblies.
- Use in demanding environments such as marine and offshore applications, chemical processing plants, food and beverage manufacturing equipment, and pharmaceutical production lines where stainless steel's corrosion resistance and material integrity are critical.
- Interfacing ORB ported components with NPSM threaded systems where an angled connection and the benefits of stainless steel are required.
Installation & Usage Guidelines
- Thoroughly clean all ORB threads, the O-ring groove on the ORB male end, NPSM threads, and all mating sealing surfaces (ORB port chamfer, NPSM male fitting seat). Ensure all components are undamaged and free from any contaminants.
- Verify that the O-ring material (Viton® is recommended for stainless steel) for the ORB end is correct for the application's fluid, temperature, and pressure. Ensure the O-ring is correctly lubricated with a system-compatible fluid or O-ring lubricant.
- Carefully install the lubricated O-ring onto the ORB male end of the elbow, ensuring it is properly seated in its groove.
- Thread the ORB male end of the elbow into the female ORB port by hand. Before fully tightening, orient the elbow to the desired 45-degree angle for proper alignment of the NPSM end.
- Once oriented, use a wrench on the elbow's hex body to tighten the ORB connection to the manufacturer's recommended torque specification for that ORB size and stainless steel material.
- Connect the female NPSM swivel end of the elbow to a mating male NPSM fitting. Ensure the sealing surfaces (e.g., 30° seats) are clean and align correctly. The swivel nut allows the elbow body to be held stationary while the nut is tightened independently to the recommended torque or until a proper mechanical seal is achieved. Note that NPSM threads are straight and do not form a seal on the threads themselves; the seal is mechanical.
- Always use appropriate backup wrenches on the elbow's hex body and mating components during tightening. For stainless steel fittings, using a thread lubricant or anti-seize compound (compatible with stainless steel) on the ORB threads is crucial to prevent galling.
Why Choose Delphi Fittings Part 6902-SS?
- Superior Corrosion Resistance: Manufactured from high-grade stainless steel (typically 316 SS), offering maximum durability and service life in harsh chemical, marine, or high-humidity environments.
- Optimized 45° Angled Connection with Swivel: Provides a secure 45-degree transition between ORB and NPSM connections, with the NPSM female swivel simplifying installation, alignment, and preventing line stress.
- Reliable Dual Sealing Integrity: Combines the robust, high-pressure SAE O-Ring Boss (ORB) seal with the effective mechanical seal characteristic of NPSM swivel connections.
- Engineered for High-Pressure Systems: Designed to withstand the demanding pressures encountered in various hydraulic applications (ensure NPSM connection pressure rating is suitable for the application).
- Broad Chemical and Temperature Compatibility: Stainless steel construction allows for use with a wider variety of aggressive fluids and across a broader temperature range.
- Adherence to Industry Standards: Meets SAE J1926 (for the ORB end) and relevant aspects of ANSI/ASME B1.20.1 (for NPSM threads), ensuring proper fit and function.
- Quality-Assured Manufacturing: Produced under Delphi Fittings' rigorous ISO 9001:2015 certified quality management system.
Get a Quote for Part 6902-SS - Stainless Steel SAE ORB Male x NPSM Female Swivel 45° Elbow
For durable, corrosion-resistant 45-degree connections from male ORB ports to male NPSM fittings, featuring the ease of a swivel nut for optimal installation, the Part 6902-SS stainless steel elbow is an excellent and reliable choice for your critical applications. Contact Delphi Fittings today for wholesale pricing, bulk order information, and expert engineering support.
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