Monoflange Valve – Double Block and Bleed Valves are compact and reliable solutions designed for instrument isolation, venting, and draining applications in high-pressure systems. These valves combine multiple functions into a single unit, reducing leakage points, installation space, and maintenance costs. Widely used in oil & gas, petrochemical, power, and process industries, Monoflange DBB Valves ensure enhanced safety, superior sealing performance, and efficient operation under demanding conditions. Available in various materials, pressure ratings, and end connections to meet diverse industrial requirements
Flange size
50 – ½”
75 – ¾”
10 – 1”
150 – 1½”
200 – 2”
300 – 3”
Flange class
150lb
300lb
600lb
900lb
1500lb
2500lb
Flange type
RTJ – Ring type joint
RF – Spiral finish raised face
Connection size
¼” (std vent)
⅜”
½” (std process/instrument)
Instrument connection
NPT standard
BP – BSP parallel pipe thread BS2779-1986
BT – BSP taper pipe thread BS21 – 1985
CE – Compression fitting
