The Starline Masterstar Ball Valve is an important part of fluid control in Chemical, Petroleum, and Petrochemical industries. This valve delivers precision and reliability with its 3-piece body design. It supports various connection types, including screwed, welded, and flanged options. The Masterstar Ball Valve works well in medium to low-pressure ranges set by Starline, showing reliability and efficiency. Capable of withstanding pressures reaching up to and including Class 800LB (PN100), it represents robustness in demanding operational environments.

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Key features and benefits of Starline Masterstar Ball Valves.

Key Features

The Starline Masterstar Ball Valve offers a flexible and robust solution for fluid control needs across various industries. With a 3-piece body design, this valve supports multiple connection options, including screwed, welded, or flanged connections. This versatility makes it easy to integrate into different fluid systems, especially in the Chemical, Petroleum, and Petrochemical sectors.

Key Features

Engineered for tough conditions, this ball valve is built to handle high pressures, accommodating up to Class 800LB (PN100). Its broad temperature range from -200°C to 260°C ensures stable and efficient performance across extreme thermal environments, which enhances operational safety and productivity.

Key Features

This valve is available in a wide range of sizes: Full Bore models come in sizes from 1/4” to 1 1/2”, while Reduced Bore variants range from 1/2” to 2”. This flexibility allows the valve to meet various system requirements, offering reliable and customizable solutions for diverse industrial applications.


Size:	DN8 - DN50 (3/8" - 2")
Body Material:	ASTM A105 - LF2 - 316 - 316L - and Special Materials
Design Standard:	ASME B16.34 - ASME B31.1 - BS5351 - P.E.D. 97/23/EC - ATEX 94/9 CE
Temperature:	-200°C up to + 260°C
Applications:	Petroleum, Chemicals, Petrochemicals and Allied Industries
Test Certificate:	UNI EN 10204 Type 3.1B
Valve Construction:	Three Piece Bolted, Solid Ball, Soft Seats, etc.
Valve Marking:	MSS SP25
Port Designs:	Full Bore & Reduced Bore
Connection Types:	Threaded, Welded, & Flanged
Handle Types:	Oval Handle, & T Handle

Starline Ultra Star Ball Valves are distinguished by their advanced features, including an anti-blowout proof stem design, double seal soft insert seats, and automatic relieving in case of over-pressuring. These features ensure enhanced safety, reliability, and performance in fluid control applications.

The anti-blowout proof stem design of Starline Ultra Star Ball Valves prevents stem ejection under pressure, minimising the risk of accidents or damage during operation. This feature ensures that the valve remains securely in place, even under high-pressure conditions.

The double seal soft insert seats provide superior sealing performance and leakage prevention, enhancing the valve's reliability and longevity. This design ensures tight sealing, even in demanding industrial environments, thereby reducing the risk of fluid leaks and minimizing maintenance requirements.

The automatic relieving feature in Starline Ball Valves activates in case of over-pressuring within the valve body, automatically relieving excess pressure to prevent damage or failure. This functionality ensures system integrity and uninterrupted operation, safeguarding equipment and personnel.

The three-piece bolted construction facilitates easy maintenance and servicing of Starline Ultra Star Ball Valves, allowing for quick disassembly and reassembly. This feature streamlines maintenance procedures, reducing downtime and enhancing operational efficiency.

Starline Ball Valves are designed to provide high-integrity shut-off at both low and high pressures, ensuring reliable performance across a wide range of operating conditions. This capability enhances process control and system safety in various industrial applications.

The double block and bleed feature in Starline Ball Valves allows for isolation and verification of fluid flow, providing added safety and security in critical processes. This functionality enables operators to maintain control over fluid flow and monitor system integrity effectively.

The floating seats spring energised design ensures consistent sealing and enhanced reliability in Starline Ball Valves. This feature enables the seats to adjust to variations in pressure and temperature, maintaining tight sealing and preventing leakage over time.

The ISO 5211 top cover flange provides a standardised interface for easy automation of Starline Ball Valves, facilitating seamless integration with actuation systems. This feature simplifies valve operation and control, enhancing overall system efficiency and performance.

Yes, Starline Ball Valves are fire test approved, ensuring compliance with industry standards for fire safety. This certification underscores the valves' ability to withstand high-temperature environments and maintain operational integrity during fire emergencies.

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Three-Piece Body Design: The three-piece body construction of Master Star Ball Valves not only facilitates easy maintenance and repair but also offers inherent advantages in terms of durability and reliability. This design allows for precise alignment of components during assembly, ensuring optimal sealing and minimising the risk of leaks over time. Additionally, the availability of screwed, welded, and flanged connections provides flexibility in installation, catering to different piping configurations and project requirements.
Optimised Pressure and Temperature Ratings: The design of Master Star Ball Valves is engineered to withstand pressures up to and including Class 800LB (PN100), making them suitable for a broad spectrum of medium to high-pressure applications within the Chemical, Petroleum, and Petrochemical Industries. Moreover, the wide temperature range capability (-200 to 260 degrees Celsius) ensures reliable performance across diverse operating conditions, from cryogenic to high-temperature environments.
Bore Options for Flow Control: Offering both full bore and reduced bore options, Master Star Ball Valves provide versatility in flow control, accommodating varying flow rates and system requirements. The availability of different bore sizes, ranging from 1/4" to 2", allows for precise adjustment and optimisation of fluid flow, enhancing system efficiency and performance.
Materials Selection for Durability: The construction materials of Master Star Ball Valves are carefully chosen for their durability, corrosion resistance, and suitability for demanding industrial applications. Whether crafted from stainless steel, carbon steel, or corrosion-resistant alloys, these materials ensure longevity and reliability in harsh operating environments, minimising the risk of premature failure and maximising uptime.