DELPHI FITTINGS
Part Number: 6901-SS
SAE ORB Male x NPSM Pipe Female Swivel 90° Elbow (Stainless Steel)
Product Overview
The Delphi Fittings Part 6901-SS is a 90° elbow adapter, expertly crafted from high-quality stainless steel (typically Grade 316 SS). This fitting is specifically designed to create a secure, right-angle connection between a component with a male SAE O-Ring Boss (ORB) port and a male NPSM (National Pipe Straight Mechanical) threaded pipe or fitting. It features 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, allowing for easy alignment without twisting the mating component or attached hose. The inherent 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 resistance to harsh conditions 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 | 90 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 against the chamfered boss of the female ORB port, providing a highly reliable, leak-proof seal. NPSM Female Swivel End: NPSM threads are straight and are not designed to seal on the threads themselves. Sealing is typically achieved by a mechanical means, usually with the NPSM female swivel seating against a 30° cone or chamfer on the mating male NPSM fitting. The swivel nut allows for tightening without rotating the elbow body or mating component. |
| Corrosion Protection | Inherent to the stainless steel material; typically passivated to enhance surface integrity. |
| Primary Function | To provide a 90-degree, leak-proof connection between a male SAE ORB port and a male NPSM pipe or fitting, offering the superior corrosion resistance of stainless steel and the installation convenience of a swivel nut. |
| Working Pressure | Suitable for hydraulic systems. Specific pressure ratings depend on the size of the fitting, the integrity of the NPSM mechanical seal, and the 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 fluids and temperatures. The O-ring is typically supplied with the fitting. |
Commonly Available Sizes (Part #6901-SS Series)
Delphi Fittings offers the 6901-SS Stainless Steel ORB Male to NPSM Female Swivel 90° 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):
- 6901-04-04-SS: -04 (7/16-20 UNF) ORB Male x 1/4" NPSM Female Swivel
- 6901-06-06-SS: -06 (9/16-18 UNF) ORB Male x 3/8" NPSM Female Swivel
- 6901-08-08-SS: -08 (3/4-16 UNF) ORB Male x 1/2" NPSM Female Swivel
- 6901-12-12-SS: -12 (1-1/16-12 UNF) ORB Male x 3/4" NPSM Female Swivel
- 6901-16-16-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 with a standard male NPSM fitting, typically on a 30° seat (please verify mating part design for compatibility). For unlisted size combinations, specific material grade requirements (e.g., 316L), or other custom needs, please contact our sales team.
Applications
The Part 6901-SS Stainless Steel 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 90-degree angle, particularly in systems requiring the corrosion resistance of stainless steel.
- Installations where the swivel feature of the NPSM female end simplifies alignment and tightening, preventing stress or twisting of hoses or rigid lines.
- Use in demanding environments such as marine and offshore applications, chemical processing plants, food and beverage manufacturing, pharmaceutical production, and other industries where exposure to corrosive substances or stringent hygiene standards necessitates stainless steel.
- Interfacing ORB ported components with NPSM threaded systems where a right-angle turn and material integrity are key.
Installation & Usage Guidelines
- Ensure 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) are meticulously clean, 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 without being twisted or pinched.
- Thread the ORB male end of the elbow into the female ORB port by hand. Before fully tightening, orient the elbow to the desired 90-degree angle to ensure correct alignment of the NPSM end for the connecting line.
- 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. The NPSM seal relies on the mechanical compression of the female swivel seat against the male fitting's seat (often a 30° cone). Ensure these sealing surfaces are clean. 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 seal is achieved. No thread sealant is used on NPSM threads for sealing purposes.
- Always use appropriate backup wrenches on the elbow hex 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 6901-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.
- Reliable Angled Connection with Swivel Convenience: Provides a secure 90-degree transition between ORB and NPSM connections, with the NPSM female swivel end simplifying installation and preventing line twist.
- Dual Sealing Integrity: Combines the robust, high-pressure SAE O-Ring Boss (ORB) seal with the effective mechanical seal of the NPSM swivel connection.
- High-Pressure Capability: Engineered to withstand the demanding pressures encountered in various hydraulic systems (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 6901-SS - Stainless Steel SAE ORB Male x NPSM Female Swivel 90° Elbow
For durable, corrosion-resistant 90-degree connections from male ORB ports to male NPSM fittings, featuring the ease of a swivel nut, the Part 6901-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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