Double Block and Bleed (DBB)

Overview

Double Block and Bleed (DBB) ball valve is made of two balls in one valve body. A bleeder is added between the two balls of the valve. 

This system is equivalent to a Double Isolation Bleed (DIB) single ball valve.

Range

ND 3/4" (DN20) to ND 24" (DN600)

Classes

ASME CLASS 150 to 2500
DIN-PN PN 10 to 64

Material

Carbon & low alloy Steels
Stainless steels
Duplex & Super Duplex
Nickel Alloys
Titanium

Design features

API 6D/6A design & construction
API 6D & ASME B1610 face to face
Antistatic device
Double block and bleed (DBB)
Drain plug

On request

Full/reduced/customize bore
Manual or actuated operation

Optional Design Features

Automatic bleeding system
By-pass system
Double Piston Effect (DPE)
Double Isolation & Bleed (DIB)
ENP on seat/ball/stem/body
Extended stem
Heating jacket
Locking device
Metal to metal seats
Needle plug
Overlay on seat pocket
Overlay on dynamic seal pockets
Overlay on all wetted parts
Polymeric lip-seals
Single Piston Effect
Stem injection fitting
Seat injection fitting
Transition pups pieces BW ends