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Screwed ball valves, also known as threaded ball valves, are a popular choice for compact pipework systems where space is limited and ease of installation is important. Designed with threaded end connections such as BSP or NPT, these valves can be quickly installed without the need for welding or flanging, making them ideal for maintenance-friendly systems and smaller bore pipelines.

WRAS ball valves provide a reliable way to support compliance within your organisation by helping to reduce leaks and water waste that can result from incorrect or unsuitable installations. By ensuring proper regulation compliance, these valves allow your system to operate efficiently and perform to its full capability.

Designed in accordance with the Water Byelaws and Water Fittings Regulations, WRAS-approved ball valves are an ideal solution for applications where regulatory compliance is essential. They are straightforward to install, offer smooth operation, and provide fast, positive shut-off with minimal effort.

Size Range:	DN15-DN100 (1/2"-4")
Body Materials:	Brass CW 617 N
Body Type:	Full Bore, 2 Piece
Applications:	Water, Gas, Air, Drinking Water, Waste Water (See Chart For More)
Pressure Rating:	1000 PSI
End Connections:	Screwed BSPP

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The BV-L2000 1000 PSI full bore 2 piece stainless steel ball valves are designed for reliable isolation in high-pressure industrial applications where durability and flow efficiency are essential. The full bore design allows unrestricted flow through the valve, minimising pressure drop and making it suitable for systems requiring consistent performance.

Size Range:	DN08-DN80 (1/4"-3")
Body Materials:	Stainless Steel A351 CF8M 316
Body Type:	Full Bore, 2 Piece
Applications:	Water, Gas, Air, Oil, Waste Water (See Chart For More)
Pressure Rating:	1000 PSI
End Connections:	Screwed BSPP/NPT

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3 piece 1000 PSI full bore stainless steel ball valves are designed for demanding industrial applications where high pressure performance, durability, and ease of maintenance are essential. The full bore design allows unrestricted flow through the valve, reducing pressure loss and maintaining efficient system operation.

Manufactured from high-quality stainless steel, these ball valves offer excellent corrosion resistance, making them suitable for use with water, oil, gas, air, steam, and a wide range of industrial process media.

Size Range:	DN08-DN100 (1/4"-4")
Body Materials:	Stainless Steel A351 CF8M 316
Body Type:	Full Bore, 3 Piece
Applications:	Water, Gas, Air, Oil, Waste Water (See Chart For More)
Pressure Rating:	1000 PSI
End Connections:	Screwed BSPP/NPT, Butt Weld, Socket Weld

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The BV-L8000FS heavy-duty ball valves are engineered to deliver enhanced performance beyond standard valve ranges. Designed in line with API 607 5th Edition (2005) fire-safe requirements (valve only), they offer a high level of reliability and strength for demanding applications.

Manufactured from stainless steel, these ball valves are suitable for both high and low pressure services and are built to provide long-term durability. Available in a range of sizes, the BV-L8000FS series offers flexibility, competitive pricing, and ready availability to suit specific application needs.

Size Range:	DN08-DN50 (1/4"-2")
Body Materials:	Stainless Steel A351 CF8M 316
Body Type:	Full Bore, 3 Piece
Applications:	Water, Gas, Air, Oil, Waste Water (See Chart For More)
Pressure Rating:	2000 PSI (1/4" - 1") 1500 PSI (1 1/4" - 2")
End Connections:	Screwed, Butt Weld, Socket Weld

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The BV-L8000FC ball valve is designed to meet the demands of modern industrial systems, particularly small to medium control applications where reduced operating torque is essential. This optimised design helps lower actuation costs while improving overall valve performance, ensuring smooth and reliable operation.

Part of the heavy-duty BV-L8000FC range, these carbon steel ball valves are built for applications requiring strength, durability, and a full bore flow path. They are capable of handling high temperatures and are rated for pressures of up to 2000 PSI, making them suitable for demanding service conditions.

Size Range:	DN08-DN50 (1/4"-2")
Body Materials:	ASTM A216 WCB Carbon Steel
Body Type:	Full Bore, 3 Piece
Applications:	Water, Gas, Air, Oil, Waste Water (See Chart For More)
Pressure Rating:	2000 PSI (1/4" - 1") 1500 PSI (1 1/4" - 2")
End Connections:	Screwed, Socket Weld

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Screwed ball valves are used to isolate or control the flow of liquids and gases in small to medium bore pipework where easy installation is required.

“Screwed” refers to threaded end connections, typically BSP or NPT, which allow the valve to be screwed directly onto the pipe without welding or flanges.

They are suitable for low to medium pressure systems. For very high-pressure applications, flanged or butt weld ball valves are usually recommended.

Yes, when correctly rated, screwed ball valves are commonly used for gas, air, oil, and water systems.

They are typically manufactured from brass, stainless steel, or carbon steel, depending on the application and media.

Many screwed ball valves are available in full bore designs, which help to reduce pressure loss and improve flow efficiency.

Yes, especially when made from stainless steel or coated materials that provide resistance to corrosion and weather exposure.

Yes, many screwed ball valves can be fitted with pneumatic or electric actuators for automated operation.

BSP threads are commonly used in the UK and Europe, while NPT threads are more common in the USA. They are not interchangeable and must be matched correctly.

Most screwed ball valves are bi-directional, allowing flow in either direction unless otherwise specified.

They are installed by screwing the valve onto threaded pipe ends, typically using thread sealant or PTFE tape to ensure a leak-free seal.

They are widely used in plant rooms, compressed air systems, water services, gas lines, HVAC systems, and general industrial installations.

Please feel free to request information and advice using the form below or call us on 0151 547 1221

Screwed Ball Valves

BSP or NPT?

Screwed ball valves are supplied with BSP (55° thread, UK and European standard) or NPT (60° thread, US standard) ends. The two are not interchangeable even where the pitch matches, so confirm the thread before ordering. Our guide to BSP vs NPT threaded ball valves shows how to identify an unknown thread.

Stainless steel: BV-L2000 2 piece, BV-L3000 3 piece, BV-L8000FS heavy duty and 3-way BSPP. Brass: standard pattern, heavy pattern and DZR. Bronze: BV-2700 series. For a comparison of body styles, read 2 piece vs 3 piece ball valves.