Screwed Valves

About Screwed Valves

Screwed refers to a valve connection method where the valve has threaded ends that allow it to be screwed directly onto the threaded ends of pipes or fittings. This is also known as a threaded connection, and it can come in two main types: male (external) or female (internal) threads.

How Does It Work?

In a screwed valve connection, the pipe and valve threads are matched (e.g., BSP or NPT standards), and the valve is rotated or threaded onto the pipe to form a tight joint. Thread sealants such as PTFE tape or pipe dope are usually applied to ensure a leak-free connection. Once tightened, the valve is securely fixed in the pipeline.

Why Is It Used?

• Simple and cost-effective to install with basic tools
• No welding or flanging required
• Quick to connect or replace, especially in small-bore systems
• Ideal for low- to medium-pressure applications
• Useful in tight or confined spaces

Common Uses:

• Domestic plumbing and heating systems
• Compressed air and gas lines
• Oil and fuel transfer systems
• Low-pressure industrial pipelines
• Temporary setups or small-scale systems