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Hy-Lok DBB Valves

SWPC Fluid Solutions is a leading supplier of high-quality fluid control products throughout the United States. To serve our customer’s most demanding requirements, we are proud to offer block and bleed valves from Hy-Lok. Our double block and bleed valve assembly is rugged and reliable, customized to your specifications.

Able to handle pressures up to 10,000 psig at temperatures between -70.6°F to +1,002°F, these assemblies reduce overall fluid system weight and height while eliminating system vibration.

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hy-lok double block & bleed (DBB) valves


  • Made from a variety of materials including 316 stainless steel, monel, duplex, and inconel, these valves do not require supporting brackets.
  • The assemblies are built with flexible configurations, end connections, body types, and valve technologies for critical piping applications.
  • Our line of integral block and bleed valves feature 316 stainless steel quarter-turn handles that facilitate low torque operation and prevent the accumulation of rust, especially when used in offshore environments.
  • Integral block and bleed valves are available in instrument isolation, pressure, level, flow measurement, instrument drain, chemical injection, and sampling models.

We offer several integral block and bleed valves in modular, monoflange, sampling, chemical injection, and root design. Used extensively in oil and gas, refining, and petrochemical applications, these valves are currently in service worldwide.