Technical Specifications
◎ Material: Carbon Steel, Stainless Steel, Alloy Steel
◎ Nominal Size: NPS 2"~16", DN 50~400
◎ Pressure Rate: Class 150~1500, PN 10~250
◎ Temperature Range: -46°C~+120°C
◎ Operator: Manual, Pneumatic, Electric, etc...
◎ Design & Manufacturing: API 6D, ISO 17292, API 608
◎ Application range: medicine, oil, natural gas, chemical industry, power station, food and other industries.
Product Description
The Naishi Double Block & Bleed Valve (DBBV) is designed to replace traditional multiple-valve assemblies in pipelines, providing a compact, integrated solution. It minimizes leakage points, enables fast isolation and drainage, and allows fluid sampling. DBBV significantly reduces installation space and cost while simplifying cleaning and maintenance.
Features & Benefits
Compact Design: One body with two balls and a bleed valve in the middle cavity.
Leakage Reduction: Fewer connections, fewer leak points.
Sampling Capability: Middle cavity can be configured for pipeline sampling via needle valve.
Efficient Operation: Small flow resistance, quick open/close.
Safety & Reliability:Blowout-proof stem，Anti-static design，Fire-safe design，Emergency grease injection for stem and seat
Sealing Performance :Dual sealing function
Floating DBBV: Self-relieving pressure in middle cavity
Trunnion DBBV: Cavity self-relieving only; middle cavity requires safety relief valve if needed
