Double Block and Bleed Valve (DBB)

Double Block and Bleed Valve (DBB)




1/2” to 3”





150 lbs. up to 2500 lbs.





API 6D, ASME B16.34,

API 6FA,API 607, API 598

andISO10497, OSHA,

ASME B.1.20.1


Body: A105/A182 Gr. F51/F316L/ A350 Gr.LF2/Inconel625

Ball: A479 Type316

Stem: A479 Type 410/ 316/ 316L

Bolting: A193 Gr. B7/ B7M, A194 Gr. 2H/ 2HM/ 7, A320 Gr. L7/ L7M, A194 Gr. 7/ 7M

Bearing: 316SS + PTFE

Seat spring: Inconel X750

Seat & Seals:

Seats ring: A182 Gr. F316/ F316L

Seats: RPTFE/ PEEK/ Reinforced PTFE/PCTFE

Environmental seals:  FKM (Viton)/ HNBR/ Nitrile Rubber/ FFKM (Kalrez) / Lipseals/ Graphite

Body seals: Graphite/ Spirally-wound SS304/ 316 with Graphite Filler

End connections:

Flanged ends/ Monoflange/Threaded ends


Lever/ Gearbox

Salient Features:

Valve types: Floating/ Trunion type.

zero leakage capabilities from upstream to downstream

Fire Safe certified, API or ISO fire safe testing standard.

Blowout-proof Stem


One piece forged body, compact design for strength and reduced leak points