Valvesonly is one of the best Double Block and Bleed valve manufacturer in USA. A Double Block and Bleed valve closes the pipe on both sides of the valve, unlike conventional valves that simply block the pipe on one side. Because it has two handles, it has two valve seats. This type of valve creates a one-way seal against a single source of pressure. They aid in the prevention of product contamination. The primary function of this valve is to isolate or block the medium in the system so that the medium from upstream does not reach downstream components. They are based on the idea that isolation can be accomplished on both sides of the valve. Using these valves saves time because they can replace three distinct valves. They're employed in a variety of industries, including oil and gas, chemical, and petrochemical.

Available materials: F51, ASTM A105, WC6, CF8, CF8M, SS304, SS316, WCB, WCC, LCB, LCC, WC6
Size: 3” to 24”
Class: 150 to 2500
Nominal Pressure: PN25 to PN450

Types of Double block and bleed valve:
• Double Block and Bleed Ball Valve.
• Double Block and Bleed Plug Valve.

Uses of Double Block and Bleed Valve:
• Prevents product contamination with the use of a double block and bleed valve.
• It helps you save time.
• Any leakage from the upstream valve will exit through the top vent rather than the downstream valve.
• They result in a measurable price reduction.

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https://valvesonly.com/product-category/double-block-and-bleed-ball-valve/