Gearbox Manual Trunnion Mounted Ball Valve

LYV® is a leading China Gearbox Manual Trunnion Mounted Ball Valve manufacturer. This Manual Gearbox Operated Trunnion Mounted Ball Valve specifically designed to solve the manual operation problems of large-diameter and high-pressure pipelines. The Industrial Gearbox Manual Trunnion Mounted Ball Valve amplifies the operating force through the built-in transmission mechanism, making the valve opening and closing effortless and energy-saving. It can be stably used in key heavy-load pipelines in industries such as petroleum and chemical, achieving reliable manual control.

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Introduction

Product Introduction

LYV®️ gearbox manual trunnion mounted ball valve as a high-performance product that meets international standards like API-6A, API-6D, ASME-B16.34, ISO-17292 and more. LYV®️ High-performance Gearbox Manual Trunnion Mounted Ball Valve has obtained API-6FA fire certification, which prove product has capacity to use for various fire safe requested applications. LYV®️ as a manufacturer to produce trunnion mounted ball valve can manufacturing NPS 2” to NPS 48” trunnion mounted ball valve, maximum pressure rating can reach to 2500LB. Furthermore, LYV®️ has conditions and experience to produce low-temperature trunnion mounted ball valve. Contact us for more details.

This valve combines gear reduction transmission with ear shaft fixed design, effectively solving the problems of excessive effort and easy damage to seals in traditional manual valves when used in high-pressure and large-diameter applications. Its gearbox structure can significantly amplify the operating force, making the opening and closing process smooth and effortless; the ear shaft fixed ball inside ensures stable sealing and long service life of the valve under high pressure differences. This design is particularly suitable for critical high-pressure pipelines in industries such as petroleum, chemical engineering, and power, which require precise manual control or serve as safety bypasses. It provides a reliable cutting function while significantly reducing operational intensity and maintenance requirements. The product strictly follows international standards such as API 6D and is backed by our over 30 years of professional manufacturing experience to ensure its performance and reliability.

Specifications

Size Range:

NPS 2”-48”; DN50-DN1000

Nominal Pressure:

150LB-2500LB; PN10-PN420

Temperature Range:

-196℃~825℃（depends on design and material）

End Connections:

Flange; Butt-weld.

Body Materials:

ASTM A216 WCB/WCC; ASTM A352 LCB/LCC; ASTM A351 CF8/CF8M/CF3/CF3M/CF8C; ASTM A890 4A/5A/6A;

ASTM A105; ASTM A182 F304/F316/F304L/F316L

Ball Materials:

ASTM A105N+ENP/A105N+TCC; ASTM A182 F304/F316/F304L/F316L; ASTM A182 F347/F51/F53/F55

Seat Materials:

PTFE/RPTFE/FPM/PEEK; 304/316+STL/INCONEL

Stem Materials:

ASTM A182 F6A; ASTM A182 F304/F316/F304L/F316L; 17-4PH; ASTM A182 F51/F53/F55

Design & Manufacture Standard:

API 6D

Face-to-face Standard:

ASME B16.10/ EN558-1

End Connection Standard:

ASME B16.5/ ASME B16.25

Test & Inspection Standard:

API 598

Features

■ Soft or metal seat available

■ Solid ball

■ RF,RTJ,BW Connection face

■ Two- or three- piece body

■ Bi-directional tight shut-off

■ Zero leakage

■ Double block & bleed (DBB) / Double Isolation & Bleed (DIB)

■ Fire-safe protection.

■ Low operating torque design

■ Anti-blowout stem design

What is Gearbox Manual Trunnion Mounted Ball Valve?

The gearbox manual trunnion mounted ball valve is a form of quarter-turn valve which uses a hollow, perforated and fixed/supported ball to control flow through it. The ball is con-strained by mounted bearings and is only allowed to rotate.

How does Gearbox Manual Trunnion Mounted Ball Valve work(sealing)?

The line pressure drives the upstream seat against the stationary ball so that the line pressure forces the upstream seat onto the ball causing it to seal. The mechanical anchoring of the ball absorbs the thrust from the line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure operating torque remains low.

Why choose LYV®️ valves?

1. Production capabilities

With 30 years of professional experience, a 13,000-square-meter factory and over 50 CNC machines form an efficient production line. It possesses complete capabilities from processing to testing, ensuring product consistency and order delivery speed.

2. Quality Certification

The ISO9001 system has been fully implemented. Our core products have obtained continuous and valid international certifications such as API 607/6FA (fire protection), API 6D (pipeline valves), and CE, ensuring that the products meet the safety and performance standards of major global markets.

3. Service delivery

Implement full-process tracking from production to transportation. Use bubble bags, flange covers, custom reinforced wooden boxes, and clearly marked professional packaging. Design dedicated transportation supports for large-diameter valves to ensure the products are delivered intact to all global sites.

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