Specification

Trunnion Mounted Fixed Ball Valve with WCB/Stainless Steel Body, Flange Connection for Water, Oil, and Gas Applications (150LB-600LB, DN50-DN900)

I. Product Overview

TIANYU trunnion mounted fixed ball valve is a robust industrial valve engineered for reliable flow control in high-pressure and high-temperature environments, designed to handle diverse media including water, oil, and gas. Characterized by its trunnion-mounted structure, this valve features a fixed ball supported by upper and lower trunnions, ensuring stable operation even under extreme pressure conditions. Constructed with high-quality materials such as WCB carbon steel, SS304, SS316, and SS316L stainless steel, it combines durability, precision sealing, and broad compatibility to meet the stringent demands of general industrial applications. With flange connections and manual operation, the valve integrates seamlessly into pipelines, providing consistent performance in sectors where operational safety, long service life, and adaptability to varying media are critical. Whether deployed in petroleum refineries, chemical plants, natural gas pipelines, or metallurgical processes, this valve delivers reliable shutoff and flow regulation, making it a cornerstone of industrial fluid systems.

II. Key Attributes and Specification Parameters

1. Basic Attributes

Structure: Trunnion-mounted fixed ball design, where the ball is supported by upper and lower trunnions (shafts) to prevent displacement under high pressure. This structure eliminates excessive stress on the valve seats, ensuring stable operation even in 600LB high-pressure systems.
Body Material: Available in multiple options to suit different media and environments:
- WCB carbon steel: Ideal for general industrial applications with moderate pressure and temperature requirements, offering cost-effective durability.
- SS304 stainless steel: Provides enhanced corrosion resistance, suitable for water, mild chemicals, and outdoor installations.
- SS316/SS316L stainless steel: Superior corrosion resistance against aggressive media such as oil, gas, and marine environments, with SS316L offering better resistance to intergranular corrosion.
Ball Material: Carbon steel or stainless steel (matching the body material for compatibility), ensuring structural integrity and wear resistance during repeated operation.
Sealing Material: PTFE (polytetrafluoroethylene), a high-performance polymer known for its chemical resistance, low friction, and ability to maintain sealing integrity across a wide temperature range. This ensures tight shutoff and reduces maintenance needs.
Pressure Rating: 150LB to 600LB, covering low to high-pressure systems, making it suitable for applications from general water pipelines to high-pressure oil and gas transmission.
Port Size: DN50 to DN900 (equivalent to 2″ to 36″), accommodating small to large-diameter pipelines, ensuring versatility across industrial setups.
Temperature Compatibility: Designed for high-temperature media, withstanding elevated temperatures typical in industrial processes such as petroleum refining and chemical synthesis.
Media Compatibility: Versatile for use with water (industrial and municipal), crude oil, refined petroleum products, natural gas, and other non-corrosive to moderately corrosive fluids.
Connection Form: Flange ends, conforming to international standards (ANSI, BS, DIN, JIS) to ensure compatibility with existing pipeline flanges, simplifying installation and replacement.
Operation Mode: Manual operation, featuring a handwheel or lever mechanism that provides precise control over ball rotation (90-degree quarter-turn) for quick shutoff or flow adjustment.
Certifications: Complies with ISO9001 quality management standards and CE safety standards, ensuring adherence to global industrial norms.
Warranty: Backed by a 3-year warranty, underscoring its reliability and providing long-term assurance for industrial users.

Product Overview

III. Product Features

TIANYU trunnion mounted fixed ball valve is distinguished by features that enhance its performance, reliability, and suitability for demanding industrial environments:

Trunnion-Mounted Stability: The fixed ball, supported by upper and lower trunnions, eliminates axial movement under high pressure, reducing wear on seats and ensuring consistent sealing. This design is critical for 600LB high-pressure applications, where traditional floating ball valves may suffer from seat damage due to pressure-induced ball displacement.
PTFE Sealing Excellence: PTFE seals offer exceptional chemical resistance, making the valve compatible with a wide range of media including oils, gases, and water. The low friction coefficient of PTFE minimizes wear during operation, extending the valve’s service life and maintaining tight shutoff even after thousands of cycles.
Broad Material Versatility: With options in WCB carbon steel and stainless steel (SS304, SS316, SS316L), the valve adapts to diverse environments—from cost-sensitive general industrial use (WCB) to corrosive settings such as coastal gas pipelines or chemical plants (SS316/SS316L).
High-Pressure and High-Temperature Tolerance: Rated for 150LB to 600LB pressure and designed for high-temperature media, the valve performs reliably in processes like steam-assisted oil recovery, high-pressure gas transmission, and industrial boiler systems.
Flange Connection Compatibility: Flange ends conform to ANSI, BS, DIN, and JIS standards, ensuring seamless integration with global pipeline systems. This compatibility reduces installation complexity, especially in multinational industrial projects.
Manual Operation Precision: The manual quarter-turn mechanism allows for quick, intuitive control—critical for applications requiring rapid shutoff in emergencies. The handwheel is designed for ergonomic operation, minimizing effort even for large-diameter valves (DN900).

IV. Manufacturing Process

TIANYU adheres to stringent manufacturing protocols to ensure the quality and performance of its trunnion mounted ball valves:

Material Selection and Inspection: Raw materials (WCB, SS304, SS316, SS316L) undergo rigorous testing to verify chemical composition, mechanical strength, and corrosion resistance. For example, stainless steel is tested for chromium and nickel content to ensure compliance with ASTM standards, while WCB carbon steel is inspected for tensile strength and impact resistance.
Precision Casting: Valve bodies and balls are produced using precision casting techniques, ensuring uniform material density and dimensional accuracy. This process eliminates internal defects (e.g., porosity) that could compromise pressure resistance, especially critical for high-pressure 600LB applications.
Trunnion and Seat Machining: Trunnions are machined to tight tolerances (±0.02mm) using CNC lathes, ensuring proper alignment with the ball and valve body. Seat surfaces are ground to a smooth finish (Ra 0.8μm or better) to enhance PTFE seal contact and reduce leakage.
Assembly and Seal Integration: PTFE seals are precision-molded to match seat dimensions, ensuring a snug fit. During assembly, the ball is aligned with trunnions to guarantee 90-degree rotation without binding, and the manual operation mechanism is calibrated to ensure smooth, consistent movement.
Pressure and Leak Testing: Each valve undergoes rigorous testing in accordance with industry standards:
- Shell test: 1.5 times the nominal pressure to verify the valve body’s integrity.
- Seat test: 1.1 times the nominal pressure to ensure zero leakage across the PTFE seals.
- Operation test: Verification of smooth 90-degree rotation and proper shutoff functionality.
Surface Treatment: Carbon steel components (WCB) receive anti-corrosion treatments such as painting or galvanizing to resist environmental degradation, while stainless steel parts undergo passivation to enhance their natural corrosion resistance.

Valve Details

V. Product Advantages

TIANYU trunnion mounted fixed ball valve offers numerous advantages that make it a preferred choice for industrial flow control:

Enhanced Durability: The trunnion-mounted design reduces wear on seats and balls, even under high pressure, extending service life compared to floating ball valves. High-quality materials (WCB, stainless steel) and precision manufacturing further contribute to long-term reliability, minimizing replacement and maintenance costs.
Superior Sealing Performance: PTFE seals provide bubble-tight shutoff, preventing media leakage—a critical feature in oil and gas applications where leakage can lead to safety hazards or environmental risks. The low friction of PTFE also ensures consistent sealing across repeated operations.
High-Pressure Capability: Rated up to 600LB, the valve is suitable for high-pressure systems such as gas transmission pipelines and oil refineries, where traditional valves may fail under extreme pressure.
Broad Application Range: Compatibility with water, oil, gas, and diverse industrial media, combined with multiple material options, allows the valve to serve across industries without the need for specialized designs.
Global Standard Compliance: Adherence to ISO9001, CE, and international flange standards (ANSI, BS, DIN, JIS) ensures compatibility with global industrial systems, facilitating integration into multinational projects and reducing regulatory barriers.
Ergonomic Manual Operation: The intuitive quarter-turn manual mechanism enables quick shutoff or flow adjustment, with ergonomic handwheels designed to minimize operator effort—even for large-diameter valves (DN900).
Long-Term Warranty Support: A 3-year warranty reflects confidence in product quality, providing users with assurance and reducing long-term operational risks.

Application

VI. Product Applications

TIANYU trunnion mounted fixed ball valve is widely used across industries that require reliable flow control in high-pressure, high-temperature, or corrosive environments:

Petroleum Industry: Deployed in crude oil extraction, refining, and pipeline transmission systems. Its high-pressure rating (up to 600LB) and corrosion resistance (SS316/SS316L options) make it suitable for handling crude oil, gasoline, and diesel.
Chemical Industry: Used in chemical synthesis, processing, and storage facilities, where compatibility with diverse chemicals (acids, solvents) and tight sealing are essential. SS316L material options resist corrosion from aggressive media.
Natural Gas Sector: Ideal for natural gas transmission and distribution pipelines, where high pressure (150LB-600LB) and leak-tight performance are critical to prevent gas loss and ensure safety.
Metallurgical Industry: Integrated into industrial water systems, cooling circuits, and fuel supply lines for furnaces, withstanding high temperatures and heavy-duty operation.
Pharmaceutical Industry: Used in water treatment and process pipelines, where stainless steel (SS304/SS316) material ensures hygiene and corrosion resistance, meeting strict industry standards.
Paper Industry: Applied in pulp processing and wastewater treatment systems, handling water, steam, and mild chemicals with reliable flow control and minimal maintenance.

TIANYU trunnion mounted fixed ball valve, with DN50-DN900 port sizes and 150LB-600LB pressure, suits water, oil, gas. Made of WCB/stainless steel, it features PTFE seals, flange connections, and manual operation. Ideal for petroleum, chemical, gas sectors. Customization (materials, sizes) available to meet specific needs.