Transition hydraulic fittings are precision piping components engineered to address common industry challenges, such as interface incompatibility across standards, cumbersome on-site modifications, and high-pressure leakage failures. Manufactured from solid bar stock using precision machining, these fittings feature a seamless, one-piece design—eliminating the need for welding or assembly from multiple parts. They enable seamless transitions between major thread standards—including DIN 24° cone, NPT, BSPP/BSPT, JIS, and ORFS—thereby avoiding the risks associated with on-site welding, makeshift diameter adjustments, or complex multi-part assemblies.
Available in both carbon steel and stainless steel, the entire product line supports pressures up to 630 bar and is compatible with a wide range of medium-to-high-pressure, heavy-duty hydraulic equipment. We support bulk purchasing of standard stock, custom thread combinations, and global supply, making these fittings suitable for diverse engineering scenarios, including equipment retrofitting, export equipment integration, and mixed-brand piping systems.
1. One-piece, weld-free structure eliminates high-pressure burst risks: Transition Hydraulic Fittings are machined from solid bar stock, bypassing traditional welding methods. The resulting structure is dense and uniform, free from defects such as weld porosity or cold joints. Under conditions of high-frequency pressure pulses and continuous equipment vibration, the fittings do not suffer from weld cracking or localized pressure loss, structurally ensuring the stability of high-pressure system operations.
2. Precision thread matching eliminates interface gaps: Leveraging precision CNC machining, every thread undergoes full inspection using go/no-go gauges, with sealing angles, thread pitch, and tooth profiles strictly adhering to international standards. They offer perfect compatibility with piping components from various brands and standards, preventing issues like micro-leakage and pressure drop caused by excessive gaps or misalignment during mixed-brand connections. 3. Streamlined full-bore design minimizes system pressure drop: The internal flow path is smooth and free of abrupt transitions. Compared to assembled adapter fittings, this design effectively reduces turbulence and flow resistance, lowers hydraulic system pressure loss, ensures stable power output for high-pressure equipment, and is suitable for continuous, long-term operation.
1. Carbon steel for general heavy-duty applications: High-strength, hardened carbon steel offers superior structural integrity and crush resistance. It stably withstands 630-bar high-pressure surges, making it ideal for standard heavy-duty hydraulic systems in mining machinery, metallurgical presses, and construction equipment.
2. Stainless steel for harsh, corrosive environments: Stainless steel provides excellent resistance to rust, acids, alkalis, and salt spray. It is suitable for corrosive conditions—such as offshore drilling platforms, outdoor equipment, and chemical fluid pipelines—significantly extending component service life and reducing the frequency of maintenance and replacement.
3. Comprehensive thread specifications for all connection needs: The range covers major standards including DIN 24° cone, NPT, BSP (male/female), JIS, and ORFS. Supporting various configurations—such as straight, reducing, elbow, and tee fittings—it enables one-stop, cross-standard pipeline modification and connection without the need for additional adapters.
1. Excellent resistance to impulse fatigue: The structure is optimized for the high-frequency pressure pulses found in mining and metallurgical equipment. It withstands long-term cyclic pressure surges without preload loss or connection loosening, solving the common issues of loosening and leakage often seen in standard fittings after a thousand hours of operation.
2. Strong adaptability to high- and low-pressure conditions: Pressure-verified for every specification, these fittings ensure tight, leak-free sealing in low-pressure lines and maintain structural integrity without deformation or extrusion under high pressure. Their pressure-bearing stability far exceeds that of standard general-purpose adapters, making them suitable for mixed high- and low-pressure hydraulic systems.
3. Vibration-resistant, anti-loosening structure: Incorporating the sealing principles of heavy-duty bite-type (ferrule) fittings, this product ensures high-precision interface mating and superior locking stability. It maintains sealing preload even under prolonged high-frequency vibration, eliminating the need for frequent manual re-tightening or inspections.
1. Resolves compatibility issues between old and new equipment standards: Older equipment often uses legacy thread standards, while new equipment adheres to modern international standards. This product serves as a direct adapter, eliminating the need to modify piping or drill new holes and route new lines, thereby significantly reducing retrofit costs and project timelines.
2. Eliminates safety hazards associated with makeshift on-site modifications: Transition Hydraulic Fitting replaces improvised methods—such as on-site welding, grinding, or stacking multiple fittings—with a standardized, ready-to-install product. This eliminates hot work and modification defects, mitigating safety risks and potential leakage issues during installation.
3. Meets multi-regional standards for export equipment: Threaded combination fittings can be customized to match the piping standards of specific export regions, solving trade-related challenges regarding local piping compatibility and the lack of interchangeable parts.
1. Direct supply of a full range of in-stock products: Standard models are kept in stock year-round, with support for direct bulk shipments. This shortens procurement lead times and meets the needs of urgent project requirements and mass equipment production.
2. Non-standard customization and development: Supports the customization of special thread combinations, unique reduction sizes, and irregular fitting structures. Products can be developed and manufactured based on specific equipment drawings and operating parameters, solving challenges related to niche or non-standard piping connections.
3. Comprehensive quality inspection and after-sales support: Bulk orders come with dimensional inspection reports and pressure test documentation to facilitate overseas customs clearance and project acceptance. Additionally, technical guidance on installation and support for selecting the right fittings based on operating conditions are provided to minimize on-site assembly errors.
DIN 24° cone (light and heavy series) – German standard
NPT / NPTF – American taper pipe thread
BSPP (G) / BSPT (R) – British standard pipe thread
JIS – Japanese industrial standard
ORFS – O-ring face seal
ISO 9001:2015 – Quality management system certified
CE 2006/42/EC – EU machinery safety directive compliant
SGS – Material composition verified (available upon request)
100% go/no-go gauge thread inspection, dimensional verification, and pressure testing per batch. Factory pass rate consistently above 99.7%. Each batch includes a complete inspection report and material certificate.
12-month warranty against manufacturing defects.
Technical support via email, phone, or video call for installation guidance and thread compatibility verification.
Batch traceability – production records archived for each batch.
Rapid resupply – standard sizes in stock; custom sizes 15-20 working days.
Free sample – available upon request for customer verification.
24-hour inquiry response.
Address
Changxing Road, Jiangbei District, Ningbo City, Zhejiang Province, China
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