20491TRW Metric Fitting for High-Pressure​

Product Overview

The 20491TRW Metric Fitting represents the pinnacle of high-pressure hydraulic connection technology, engineered specifically to meet the extreme demands of hydraulic systems operating under intense pressure conditions. Designed with precision manufacturing techniques and advanced materials, this fitting provides secure and reliable connections in critical high-pressure circuits where failure could have catastrophic consequences. Its robust construction and innovative design features ensure leak-free performance even in the most demanding industrial environments, making it the preferred choice for applications requiring uncompromising hydraulic system integrity. The 20491TRW fitting sets new standards for durability and performance in high-pressure hydraulic connections.

Product Features

High-Pressure Construction

Engineered for extreme pressure applications, the 20491TRW Metric Fitting boasts a maximum operating pressure rating of 6,300 PSI (434 bar) for standard configurations, with specialized versions available for applications up to 8,000 PSI (552 bar). This exceptional pressure capability is achieved through AISI 4140 alloy steel construction, which undergoes a proprietary heat treatment process to achieve a tensile strength of 120,000 PSI and superior resistance to fatigue failure under repeated pressure cycles. The fitting's design incorporates thicker wall sections at critical stress points, ensuring pressure containment even under extreme operating conditions.

Advanced Sealing Technology

The 20491TRW Fitting features a double-seal design that combines a precision-machined metal-to-metal seal with an auxiliary O-ring backup seal, providing redundant protection against leakage in high-pressure applications. The primary metal seal consists of a 30° cone face that mates with a corresponding seat, creating a secure seal that withstands pressure spikes and temperature fluctuations. The secondary fluorocarbon (Viton®) O-ring provides additional leak protection, making this fitting suitable for applications where zero leakage is critical. This dual-seal approach ensures reliable performance across the fitting's entire pressure and temperature range.

Material & Corrosion Resistance

Constructed from heat-treated AISI 4140 chrome-moly steel as standard, the 20491TRW Fitting offers exceptional strength and impact resistance for high-pressure applications. The fitting surface undergoes a multi-layer zinc-nickel plating process with a thickness of 10-15 microns, providing superior corrosion resistance verified through 168-hour salt spray testing. For extreme environments, an optional AISI 316 stainless steel version is available, offering enhanced resistance to chemical attack, saltwater exposure, and aggressive industrial environments. All materials are carefully selected to maintain their mechanical properties across the fitting's operating temperature range.

Applications

Heavy Industrial Presses

In manufacturing facilities, the 20491TRW Metric Fitting is widely used in hydraulic press systems, metal forming machinery, and forging equipment operating at extreme pressures. These applications require reliable performance under repeated pressure cycles up to the fitting's maximum rating, where it ensures consistent fluid delivery to hydraulic cylinders generating the extreme forces needed for metal forming, stamping, and fabrication processes.

Oil & Gas Equipment

The 20491TRW Fitting plays a critical role in oil and gas exploration and production equipment, including hydraulic systems for drilling rigs, wellhead control panels, and blowout preventers. Its high-pressure capability and corrosion resistance make it suitable for the extreme operating conditions encountered in upstream oil and gas operations, where hydraulic systems must operate reliably in remote locations with harsh environmental conditions.

Mining & Heavy Machinery

In mining operations, the 20491TRW Fitting provides essential connections in hydraulic systems for large mining trucks, excavators, and drilling equipment. Its ability to withstand high pressures while resisting corrosion from abrasive dust and moisture makes it ideal for the extreme operating environments found in mining operations, where equipment reliability directly impacts productivity and safety.

FAQ

What makes the 20491TRW Fitting suitable for high-pressure applications?

The 20491TRW's suitability for high-pressure use stems from several advanced design features: its AISI 4140 alloy steel construction with heat treatment for enhanced strength, reinforced wall sections at critical stress points, and double-seal technology that provides redundant leakage protection. The fitting's precision manufacturing ensures dimensional accuracy and consistent performance, while its optimized flow path minimizes pressure drop and turbulence that can contribute to system fatigue. These features collectively enable the fitting to withstand the extreme pressures and mechanical stresses characteristic of high-pressure hydraulic systems.

What is the temperature range for the 20491TRW Fitting?

The 20491TRW Metric Fitting maintains reliable performance across an extreme temperature range of -40°C to 150°C (-40°F to 302°F) for standard configurations with Viton® O-rings. For applications requiring extended temperature capabilities, a high-temperature version with perfluoroelastomer (FFKM) O-rings is available, extending the upper temperature limit to 200°C (392°F). Pressure ratings remain unaffected within this temperature range, though we recommend consulting our technical team for applications involving temperature cycling or extreme temperature extremes.

How does pressure derating affect the 20491TRW Fitting?

Pressure derating is generally not required for the 20491TRW Fitting within its specified temperature range of -40°C to 150°C (-40°F to 302°F). However, for continuous operation above 150°C (302°F), a derating factor of 10% per 25°C increase is recommended to ensure long-term reliability. Pressure derating may also be necessary when using the fitting with certain aggressive hydraulic fluids that can affect material properties over time. Always consult the manufacturer's technical data sheet for specific derating guidelines based on your application parameters.

Can the 20491TRW Fitting be reused after disassembly?

While the 20491TRW Fitting features robust construction, it is generally recommended for single use in critical high-pressure applications. Reusing the fitting may compromise the integrity of the metal-to-metal seal, as the precision sealing surfaces can become damaged during disassembly. For non-critical applications where reuse is necessary, a thorough inspection by a qualified technician is required, including checking for thread damage, seal surface scratches, and signs of deformation. The O-ring must be replaced with each assembly, and proper torque specifications must be strictly followed during reinstallation.

What hose types are compatible with the 20491TRW Fitting?

The 20491TRW Metric Fitting is compatible with high-pressure hydraulic hoses including SAE 100 R12, R13, R15, and R17 when used with appropriate crimp ferrules and procedures. It is also compatible with ISO 1436 Type 4SP and 4SH high-pressure hoses. Proper hose selection is critical—hose working pressure must meet or exceed the fitting's 6,300 PSI rating, and the hose must be rated for the application's temperature range and fluid type. Always refer to the manufacturer's hose assembly guidelines for proper crimp specifications and procedures when assembling the 20491TRW Fitting with hydraulic hose.