Industrial Instrumentation Fittings & Valves | Precision Compression Tube Fittings
Double Ferrule Compression Technology / Rated up to 10,000 psig / 100% Interchangeable
Sunhy offers a full range of instrumentation fittings designed for critical process control systems in the oil and gas, chemical, power, and semiconductor industries. Our products feature a proven double ferrule design, providing airtight seals under high pressure, high vibration, and thermal cycling conditions. All fittings are manufactured from premium 316/316L stainless steel, Super Duplex 2507, and specialty alloys, fully compliant with ASME B31.1 and B31.3 process piping specifications.
Our Focus
World-Class Manufacturing & Quality Assurance
Equipped with advanced Mazak and Doosan CNC centers, we manufacture instrumentation fittings with exacting tolerances (±0.01mm) and superior surface finishes (Ra 0.4). Backed by ISO 9001 and PED certifications, our automated production lines ensure rapid scalability for both standard stock and custom OEM projects.
Production Scale
- 120+ High-Precision CNC Lathes
- Dedicated production lines for 316L SS
➜ Monthly capacity of 500,000+ fittings ensures stable supply chains for global distributors.
Material Expertise
- Dual Certified 316/316L Stainless Steel
- Handling Exotic Alloys (Monel, Hastelloy, Duplex)
➜ Benefit: Solutions engineered to withstand extreme corrosion and temperatures (-198°C to 648°C).
Rigorous Testing
- Spectrometer Material Analysis (PMI)
- Hydrostatic & Pneumatic Proof Testing
➜ Benefit: Every production lot is heat-code traceable to the mill certificate (EN 10204 3.1).
Our Products
Precision Instrumentation Fittings & Valves
Engineered for absolute reliability in critical fluid systems. Our comprehensive range features double-ferrule technology, process valves, and high-pressure components manufactured from premium 316/316L stainless steel for zero-leakage performance.
Tube Fittings
Industry-standard double ferrule compression design. Ensures leak-tight seals and vibration resistance in process instrumentation. Compatible with standard tubing.
Weld Fittings
Permanent high-integrity connections. Socket weld and butt weld fittings engineered for hazardous systems or permanent installations requiring zero maintenance.
Our Solutions
Zero-Leak Integrity for Critical Process Control
Vibration, thermal shock, and pressure spikes are the main causes of system failure. Sunhy utilizes a proven double-ferrule mechanical grip design to solve this. The front ferrule creates a gas-tight primary seal, while the back ferrule hinges to grip the tubing, isolating the seal from vibration and ensuring safety under high pressure.
Manufactured from ASTM-standard 316/316L Stainless Steel, every fitting is gaugeable and traceable. We ensure precise tolerances for consistent remakes—no leaks, no galling, just reliable connections that protect your infrastructure.
Sunhy is your
Complete Instrumentation Solution Provider
From standard Double Ferrule Tube Fittings to high-pressure valves and manifolds, Sunhy delivers comprehensive solutions for fluid system integrity. Trusted across Oil & Gas, Chemical Processing, and Power Generation, we combine meticulous engineering with uncompromising standards to safeguard your operations.
Core Product Range
- Double & Single Ferrule Tube Fittings
- Instrumentation Pipe Fittings (NPT/ISO)
- Medium/High Pressure Adapters
- Needle Valves & Ball Valves
- Valve Manifolds (2, 3, 5-way)
Critical Applications
- Oil & Gas Sampling Systems
- Process Control Instrumentation
- Hydrogen Fuel Cells & Storage
- Offshore & Marine Hydraulics
- Semiconductor Gas Delivery
Value-Added Services
- Custom Alloy Manufacturing (Inconel, Titanium)
- OEM Branding & Private Labeling
- Specified Cleaning (Oxygen Clean)
- Component Kitting & Assembly
- Material Test Reports (MTRs)
Explore Sunhy
End-to-End Quality Control & Precision Manufacturing
Reliability starts at the molecular level. We maintain strict control over the entire production lifecycle—sourced strictly from premium ASTM A276/A479 Stainless Steel and shaped through verified cold heading and forging processes. Our facility utilizes multi-axis CNC machining to achieve micron-level tolerances required for leak-tight instrumentation seals. The process concludes with automated passivation, ultrasonic cleaning, and rigorous validation, ensuring every fitting is delivered with full Heat Code Traceability and EN 10204 3.1 Certification.
Raw Material & Forging
- Premium SS316/316L Bar Stock Sourcing
- Spectrometer Acceptance Testing (Incoming QC)
- Precision Blank Cutting
- Cold Heading (For High-Strength Nuts)
- Die Forging & Open Die Forging (For Bodies/Elbows)
Precision CNC Machining
- Advanced CNC Turning Centers (Mazak/Doosan)
- 5-Axis Machining for Complex Geometries
- Rolled Threads (For increased strength)
- High-Precision Sealing Cone Machining
- Nut & Ferrule Interior Profiling
Surface Finish & Welding
- Chemical Passivation (Crucial for corrosion resistance)
- Ultrasonic Cleaning & Degreasing
- Internal/External Electropolishing
- Silver Plating (For Nut threads to prevent galling)
- Automatic Orbital Welding (For weld fittings)
- Laser Marking (Traceability Codes & Brand)
Testing & Certification
- Positive Material Identification (PMI)
- Hydrostatic & Pneumatic Proof Testing
- Visual & Dimensional Inspection
- Surface Roughness Measurement (Ra)
- EN 10204 3.1 Material Certificates
- Ultrasonic Testing (UT)
- Intergranular Corrosion Testing (ASTM A262)
Sunhy solutions for
Rigorous Validation & Certified Delivery
Reliability is verified through data. Sunhy executes a strict validation protocol for every instrumentation fitting to guarantee zero-leak performance. We utilize Positive Material Identification (PMI) to verify alloy chemistry and Coordinate Measuring Machines (CMM) to ensure micron-level dimensional tolerances. Performance is confirmed through hydrostatic burst and pneumatic nitrogen testing to ensure integrity under extreme pressure. Every shipment is backed by EN 10204 3.1 Material Certificates and full heat-code traceability, ensuring your documentation is as robust as the product itself.
Sunhy Solutions for
Compliance & Quality Assurance
Our manufacturing excellence is anchored by a fully integrated management system accredited to ISO 9001:2015 (Quality), ISO 14001:2015 (Environmental), and ISO 45001:2018 (Occupational Health & Safety). These certifications validate our operational consistency and commitment to sustainable, safe manufacturing practices.
For critical applications, Sunhy instrumentation fittings hold DNV Type Approval for marine and offshore use and meet the safety requirements of the EU Pressure Equipment Directive (PED 2014/68/EU). Additionally, all wetted components are compliant with NACE MR0175/ISO 15156, ensuring superior resistance to sulfide stress cracking in sour gas environments.
The Sunhy Advantage
Reliability Beyond the Surface
In critical fluid systems, visual similarity does not guarantee performance. While generic fittings may appear identical, they often compromise on the rigorous metallurgical control and sub-micron tolerances essential for safety. Below is the measurable difference between permanent peace of mind and unpredictable risk.
Sunhy Quality
VS
Low Quality
Certified Metallurgy & Full Traceability. Sourced solely from approved global mills with verified chemical composition (optimized Ni/Cr/Mo content) for maximum corrosion resistance. Every heat code is fully traceable to the original mill certificate.
Commoditized Material Sourcing. Often utilizes material with minimum allowable alloy content to cut costs. “Budget” stainless steel lacks the robust chemical balance needed to resist pitting in harsh environments over time.
Sub-Micron Machining Tolerances. Exacting dimensions on critical ferrule seating cones and tube bore ensure a consistent, gas-tight seal and resistance to vibration fatigue, even after multiple remakes.
Inconsistent Dimensional Control. Loose tolerances on sealing surfaces lead to improper ferrule swaging action. This invisible flaw is the primary cause of slow leaks under high pressure or thermal cycling.
Advanced Passivation & Cleanliness. Thorough passivation processes remove surface iron contaminants, creating a robust, passive chromium oxide layer crucial for corrosion protection and ultra-clean applications.
Standard Industrial Finish. Basic cleaning may leave microscopic machining residues or imbedded carbon steel particles, which act as initiation sites for localized corrosion and system contamination.
Optimized Alloy Content (High Mo/Ni). We strictly control the chemical composition beyond standard ASTM requirements. Our 316/316L SS features elevated Nickel and Molybdenum (>2.5%) levels, ensuring a higher Pitting Resistance Equivalent Number (PREN) to withstand chloride environments and severe corrosion.
“Lean” Composition (Minimum Spec). Generic fittings often hug the bottom limit of the standard specification (e.g., barely 2.0% Mo) to save raw material costs. While technically “compliant,” these materials are significantly more prone to pitting and stress corrosion cracking in real-world operations.
Comprehensive Validation & NDT. Safety is verified, not assumed. Sunhy fittings undergo rigorous Non-Destructive Testing (NDT), including ultrasonic and pneumatic proof testing. We hold critical global approvals (PED, DNV, ABS), ensuring our products meet the safety factors required for high-pressure hydrogen and offshore applications.
Basic Batch Sampling Only. Many alternatives rely solely on statistical batch sampling (AQL) without 100% verification of critical distinct parts. They may lack specific industry type-approvals, leaving the engineer with liability risks during safety audits.
Experience the Sunhy Difference
Trusted Worldwide: Powering Projects Across 30+ Nations
Reliability knows no borders. From single precision fittings to bulk inventory stocking, Sunhy delivers scalable supply chain solutions tailored to your region. With a proven track record serving 200+ ongoing partnerships, we understand the nuances of global logistics. We don’t just ship parts; we deliver operational continuity. Experience the peace of mind that comes with a partner who ensures every shipment lands safely, compliantly, and exactly when you need it.
Dedicated Customer Support Teams
Serving Impressive List Of Long Term Clients!
Our growth is a testament to how much we value our customers. Exceptional customer service has been the key to our success, ensuring satisfaction and fostering loyalty. Thank you for helping us grow together.
Seeing is believing
About Sunhy
See Quality in the Making, Build Trust in Person
Visit Sunhy Factory: See Quality, Build Trust
🏭 Full-Process Tour
See precision machining, assembly, and testing—witness how each stainless steel fitting is born.
🤝 Technical Exchange
Our engineers provide on-site support for selection, customization, and solutions.
Submit your visit request—we’ll contact you within 24h to plan your custom tour.
