Instrumentation Hydraulic Fitting Supplier in China

❖ Torque-free sealing

❖ Fast delivery with hassle-free customization

❖ Global standard quality, cost-effective pricing

❖ Advanced manufacturing processes with international certifications

Product List

Instrumentation fittings play a crucial role in industrial piping systems by ensuring secure and leak-free connections. Our extensive range includes Double Ferrule Compression Fittings, Cone and Thread Fittings, Butt Weld Fittings, and Push-to-Connect Fittings. Whether you need standard fittings or custom designs tailored specifically to your project, Topa can provide an ideal solution. Contact us today to customize your perfect fitting solution!

Applications

Our instrumentation fittings are trusted in the most demanding industries worldwide, delivering reliable performance in critical systems.

Oil and Gas

Instrumentation fittings are crucial in oil and gas exploration, providing secure connections for monitoring equipment, pipeline systems, and control instrumentation.

Chemical Processing

Our fittings are ideal for use in chemical plants, connecting critical instrumentation for accurate measurement and safe handling of volatile and hazardous chemicals.

Power Generation

Instrumentation fittings are widely used in power generation facilities to connect instrumentation devices for monitoring pressures, temperatures, and flows.

Pharmaceutical factory

Ultra-clean, high-purity fittings for pharmaceutical manufacturing and research applications.

Marine & Shipbuilding

Corrosion-resistant, vibration-proof fittings for marine environments and shipboard systems.

Pulp & Paper Industry

Heavy-duty fittings designed to withstand vibration, moisture, and corrosive chemicals.

Products Features

Technical Specifications

Pressure Ratings

Temperature Range

Connection Types

Size Range

Working Principle

Instrument fittings consist of two ferrules that reinforce a shaft or bind materials together. They provide a torque-free seal and prevent leaks at tube connections. Instrumentation fittings operate on the principle of creating secure, leak-proof connections through precise mechanical compression or welding techniques. In the case of double ferrule fittings, when tightened, the rear ferrule provides the necessary gripping force, anchoring the tube firmly, while the front ferrule simultaneously forms a tight seal against the fitting body.

Components

Precision-machined from solid bar stock with carefully designed internal geometry

Creates primary seal against fitting body and tube surface

Provides tube grip and reinforces front ferrule seal (in double ferrule designs)

Drives ferrules forward and maintains consistent sealing pressure

Sealing Mechanism

The tube is inserted into the fitting body until it bottoms out against the internal shoulder. The nut is then hand-tightened, bringing the ferrules into contact with the fitting body.

As the nut is tightened, the front ferrule creates a seal against both the fitting body and the tube surface. In double ferrule designs, the back ferrule drives the front ferrule forward while gripping the tube.

When properly tightened (typically 1¼ turns from finger-tight), the ferrules create a gas-tight seal and secure mechanical grip on the tube, preventing both leakage and tube pull-out.

Under pressure, the sealing forces actually increase as the system pressure pushes against the ferrule geometry, creating an even tighter seal – a principle known as "pressure-assisted sealing."

Installation Tips

Material Overview

Our instrumentation fittings are trusted in the most demanding industries worldwide, delivering reliable performance in critical systems.

316 Stainless Steel

316 stainless steel is the industry standard for high-performance environments due to its excellent resistance to corrosion, high temperatures, and high pressures. It is ideal for offshore oil and gas, petrochemical, and food-grade applications where long-term reliability and sanitation are critical. Its chromium, nickel, and molybdenum composition offers enhanced pitting resistance in aggressive environments such as chlorides and marine atmospheres.

Brass

Brass is a versatile and cost-effective material that offers good corrosion resistance and machinability, making it suitable for low to medium pressure applications. It is widely used in general-purpose water, air, and non-corrosive fluid systems. Its ease of installation and affordability make it a popular choice for commercial and residential instrumentation setups.

Carbon Steel

Carbon steel fittings are known for their high mechanical strength and toughness, making them suitable for heavy-duty applications in standard industrial environments. While less resistant to corrosion than stainless steel, they are typically coated or treated to withstand moderate environmental exposure. Carbon steel is often used in hydraulic systems, manufacturing plants, and construction machinery where durability and structural integrity are essential.

Special Material Options

Material Testing

Documentation

Why Choose Topa Instrumentation Fitting?

Superior Leak Protection

Our proprietary sealing technology ensures zero leakage even under extreme pressure and temperature conditions, providing unmatched reliability in critical applications.

Easy Installation

Designed for quick and straightforward installation, our fittings reduce assembly time by up to 40% compared to conventional products, saving valuable maintenance hours.

Reusability

Topa fittings can be disassembled and reassembled multiple times without compromising performance, significantly reducing replacement costs.

Extreme Temperature Resistance

Engineered to perform flawlessly in temperatures ranging from -328°F to +1200°F (-200°C to +650°C), making them ideal for the most demanding industrial environments.

Vibration Resistance

Our advanced design incorporates vibration-dampening features that prevent loosening in high-vibration environments, ensuring continuous operation without maintenance.

Global Certification

Topa fittings meet or exceed all major international standards, ensuring compliance with global regulatory requirements.

Our Services

Fast Response

24-hour response to customer inquiries.

Global Shipping

Reliable and swift logistics solutions.

Technical Support

Real-time consultation from technical experts.

Customized Solutions

Personalized product design and manufacturing.

Quality Control

100% inspection to guarantee product quality.

Flexible Orders

Handling small to large-scale orders flexibly.

After-Sales Support

Professional ongoing after-sales services.

Training Services

On-site installation and usage training.

Why Choose Us

Topa’s manufacturing facility is built for precision, scalability, and consistency—offering direct benefits to every client we serve. Each instrumentation fitting is crafted using advanced CNC machining systems and strict material traceability, ensuring dimensional accuracy and long-term durability even in the most demanding applications.

We maintain a vertically integrated production process supported by automated inspection systems and robust quality control protocols. Every component is checked for tolerance, sealing performance, and surface finish, minimizing product defects and guaranteeing international compliance.

Our lean production model enables us to handle both bulk and custom orders efficiently. Whether you need standardized parts or special configurations, working with Topa means dependable lead times, reduced procurement risk, and total confidence in the quality and consistency of your supply chain.

Quality Focus

Every product undergoes rigorous testing and inspection to ensure it meets our exacting standards.

Innovation

Continuous investment in R&D to develop new solutions for evolving industry challenges.

Global Reach

Fast shipping and a variety of modes to serve customers worldwide.

Expert Team

Industry-leading engineers and technical specialists with decades of combined experience.

50+

Manufacturing Facilities

20+

Countries Served

50+

Employees Worldwide

2,000+

Products

30+

Years

100+

Customers

FAQ

What types of instrumentation fittings are available?

Topa offers double ferrule compression fittings, cone and thread fittings, butt weld fittings, and push-to-connect fittings.

What is the pressure rating of your fittings?

Our fittings are engineered to operate within a range of 3000 to 15000 PSI, suitable for a wide variety of industrial applications.

What temperature range can your fittings withstand?

Our products are designed to perform in extreme temperatures, from -50°C to +450°C.

What materials are used for your fittings?

We manufacture fittings using 316 stainless steel, brass, carbon steel, and high-performance alloys like Inconel.

What is the working principle of a double ferrule fitting?

The front ferrule seals against the fitting body while the back ferrule grips the tube, ensuring a leak-proof, vibration-resistant connection.

What sizes are your fittings available in?

We offer a wide size range from 1/8” to 2” to accommodate various tubing systems.

Are your fittings reusable?

While most fittings are single-use to ensure optimal sealing, certain components can be reused if inspected and deemed undamaged.

What surface finish do your fittings have?

Our fittings typically feature a clean, passivated or electropolished finish to enhance corrosion resistance and appearance.

Do your fittings support different thread standards?

Yes, we support a variety of thread standards including NPT, BSP, JIC, and Metric threads for global compatibility.

Can your fittings be used in high-vibration environments?

Yes, our double ferrule fittings are specifically designed to resist vibration and maintain integrity under dynamic conditions.