B3 Series Stainless Steel Two-Piece Threaded Ball Valve - 3/8 inch; L=49mm BRA.B3.622

Product detailed description

This two-piece ball valve is commonly used in residential and commercial heating, ventilation and plumbing systems. Installers working on central heating circuits, domestic hot water lines, or industrial oil and hydrocarbon transfer systems will find this valve suitable for applications requiring reliable on/off control. The valve supports a wide range of media including potable water, oils and hydrocarbons within specified temperature ranges. Its compact length of 49mm makes it suitable for tight spaces in mechanical rooms, boiler houses and underfloor heating manifolds.

Typical installation scenarios include integration into closed-loop heating systems, expansion vessel circuits, and condensate lines. It is often found in systems where the medium requires a high degree of corrosion resistance and long-term durability. The threaded connections allow for straightforward installation using standard pipe tools, avoiding the need for welding or complex flange setups.

Technical parameters

Installation and connection

Before installation, confirm that the system is depressurised and clean. Threaded ends conform to ISO 228-1 standards, allowing for compatibility with 1/4 inch to 4 inch pipe systems. Apply a suitable thread sealant or PTFE tape to ensure leak-free connections. Ensure full engagement of the threads and avoid overtightening to prevent damage to the valve body or gaskets. After installation, verify the movement of the lever to confirm smooth operation and check for any signs of leakage under operating pressure.

Compatibility and accessories

This ball valve is compatible with standard pipe systems using ISO 228-1 threaded fittings. It integrates well with manifold blocks, pipe unions and other threaded valves of similar size and material. When installing in a new system, ensure that all adjacent components are also rated for the same media and operating conditions. Additional items such as isolating unions or pressure-reducing valves may be required depending on the application and system design.

Technical background for designers

The ball valve operates via a rotating spherical disc with a through-hole. The stainless steel body resists corrosion in aggressive environments, while the 316 stainless steel ball and stem provide wear resistance. PTFE seals offer low friction and chemical inertness. The two-piece construction allows for easier maintenance compared to monoblock designs. The valve should be integrated into systems with stable flow conditions and not used for throttling or flow regulation due to potential wear and inefficiency.

Service and operation

During operation, inspect the lever for smooth movement and check for leaks around the body and threads. There are no scheduled maintenance intervals specified, but regular visual checks are recommended in high-use applications. In case of jamming or reduced performance, disassemble the valve carefully following manufacturer guidelines to inspect internal components for debris or wear.

Frequently asked questions

Can this valve be used in a steam circuit?
No, it is not suitable for steam applications as stated in the technical specifications.

Is it possible to regulate flow with this ball valve?
No, it is designed for on/off control and not for flow regulation.

What type of seal is used between the ball and body?
The ball and stem use PTFE sealing material, which provides a durable and chemically resistant seal.

Can it be used in a potable water system?
Yes, it is certified for use with potable water according to relevant standards.