Mecesa · Manifolds
Mecesa double block and bleed valves
Double block and bleed valves to ASME B16.34 and ASME B31.1: two ball or needle isolation valves and a bleed in one flanged body.
A DBB valve replaces the traditional chain of isolation valve, spool, second valve and bleed with one forged body. Mecesa makes them to ASME B16.34 (valve design) and to ASME B31.1 (piping code), with ball or needle isolation and a needle bleed, in stainless steel and special alloys.
Selection data we need
Inlet flange size and rating, outlet connection, ball or needle isolation, material, pressure and temperature, medium, quantity.
Applications
- Instrument take-offs from process piping
- Chemical injection and sampling points
- Replacing valve, spool and bleed assemblies with one compact unit


