API 6D ASME Cast Steel Flange Top Entry Trunnion Mounted Ball Valve

Specification

TIANYU cast steel top entry trunnion mounted ball valve is a critical control device in industrial pipeline systems, with the following core attributes and specifications:

Material: The main body is made of carbon steel, stainless steel, duplex steel, super duplex steel, nickel alloy, titanium, etc., which can adapt to different medium environments.
Connection type: Flange connection is adopted to meet the standardized assembly requirements of industrial pipelines.
Drive mode: Worm gear drive is standard, and various drive modes such as electric, pneumatic, hydraulic or electro-hydraulic linkage are optional, suitable for different automation scenarios.
Nominal pressure: Covers 150lb-2500lb (ASME CLASS) and PN10-PN64 (DIN standard), which can cope with low to high pressure working conditions.
Specification range: The diameter ranges from 1″ (DN25) to 24″ (DN600), adapting to pipeline systems with different flow requirements.
Structural design: Three-piece structure and trunnion mounted design, with a straight-through channel to ensure low medium flow resistance.
Temperature adaptation: Suitable for normal temperature working conditions, and special materials can be optionally equipped with high-temperature or low-temperature adaptation versions.
Sealing components: The valve seat material includes RTFE, nylon, PEEK, etc., with elastic elements to ensure sealing preload.
Implementation standards: In line with API 6D/6A design and manufacturing requirements, and the face-to-face distance meets API 6D and ASME B16.10 standards.

Product Overview

Product Features

TIANYU cast steel top entry trunnion mounted ball valve integrates multiple industrial-grade designs, with the following core features:

Modular maintenance design: The top entry structure allows direct disassembly of components from the top of the valve body, enabling on-line maintenance or replacement of parts without overall disassembly of the valve, which greatly reduces downtime.
Comprehensive safety protection: Equipped with anti-static devices to avoid dangerous situations caused by static accumulation; adopts fireproof design to meet industrial safety specifications; self-draining valve seat can automatically release excessive pressure in the cavity, improving system safety.
Excellent sealing performance: The double block and bleed (DBB) function can block the upstream and downstream media at the same time and discharge the media in the middle cavity, ensuring maintenance safety; the valve seat and ball are precisely matched, with O-ring sealing to achieve zero leakage.
Strong structural adaptability: The trunnion mounted design makes the ball stress more stable, suitable for high-pressure and large-diameter working conditions; equipped with lifting lugs and valve brackets for easy installation and fixation; the connecting end can be customized according to pipeline requirements to improve adaptability.

Manufacturing Process

TIANYU strictly controls the manufacturing process of the ball valve to ensure stable performance:

Material processing: The valve body adopts Cast or forging process (such as Hastelloy and other special materials), and its chemical composition and mechanical properties meet ASME standards. Forging eliminates internal defects of materials and improves structural strength.
Precision machining: The ball and valve seat are processed by high-precision lathes and grinders, and the surface roughness is controlled in a very low range to ensure fit; the design of the sealing surface strictly calculates the specific pressure and allowable specific pressure to ensure sealing reliability.
Assembly process: Adopts split assembly, and the ball and valve seat are installed from the side for precise positioning; the elastic elements (such as springs) at the rear of the valve seat undergo preload testing to ensure stable sealing force during long-term use.
Testing standards: Each valve undergoes pressure testing, sealing testing, action testing, etc. Key components such as valve stems and trunnions are subject to non-destructive testing to ensure compliance with international standards such as API 6D/6A.

Valve Details

Product Advantages

Compared with traditional ball valves, TIANYU top entry trunnion mounted ball valve has significant advantages:

High maintenance efficiency: The top entry design allows maintenance without disassembling the pipeline, reducing the shutdown loss of industrial systems, especially suitable for chemical, energy and other fields with continuous production.
Good high-pressure stability: The trunnion structure disperses the force on the ball, which can still maintain stable operation under high-pressure (such as 2500lb) working conditions, avoiding sealing failure caused by ball deviation.
Wide application scenarios: The combination of multiple materials, multiple pressure levels and multiple drive modes can adapt to corrosive, high-temperature and high-pressure media in petroleum, natural gas, chemical industry, water treatment and other industries.
Strong safety compliance: Fireproof, anti-static, DBB and other designs meet international specifications such as API and ASME, and can be used in hazardous areas to reduce safety risks.
High long-term reliability: The forged valve body has strong fatigue resistance, the precision-machined sealing pair reduces wear, and the elastic element compensates for the attenuation of sealing force, prolonging the service life.

Application

Product Applications

The ball valve is widely used in the cut-off and connection control of media in industrial pipeline systems, including the following specific scenarios:

Oil and gas industry: Used in oil and gas transmission pipelines and drilling platforms, adapting to high-pressure, flammable and explosive media. The fireproof and anti-static design improves operation safety.
Chemical industry: In pipelines with corrosive media such as acids, alkalis and organic solvents, the corrosion-resistant materials and reliable sealing ensure zero leakage of media.
Power industry: Used in auxiliary pipeline systems such as steam and water, the adaptability to normal temperature working conditions and structural stability meet the needs of continuous operation of power plants.
Municipal engineering: In large-scale water treatment and sewage treatment pipelines, the flange connection and large-diameter design adapt to the standardized installation of municipal pipelines, facilitating maintenance.