Two balls DBB floating ball valve of 1/2"-12" CL150-2500 API 6D,
The DBB ball valve is the abbreviation for the double block and bleed ball valve. Some of DBB valves have two balls and one or two needle
valves,the two ball valves can opend and closed the medium and two
needle valves can discharge pressure of the valves,the ball valve
is designed to replace the complex form of the connection of
multiple valves in traditional pipes,so as to reduce leakage points
in the system and realize fast discharging and closing. The DBB
ball valves saves the installation procedures,reduces pressure in
the pipe system,faciliates instrument cleaning and maintence and
lowers the cost.
Two independently operable 5.0mm bore globe style needle valves for
isolation service with an intermediate 5.0mm bore globe style
needle valve for venting service. Metal seating features as
standard for all valves.
The integrally forged one piece block & bleed assemblies for
primary isolation of pressure take-offs, where the valve is
directly mounted to the vessel or process pipe. Instruments may be
directly mounted to the valves outlet or alternatively remotely
mounted with gauge line/impulse pipe work.
- ½ -inch NPT threaded female outlet as standard to ANSI/ASME
- ½ NPT threaded female vent connection to ANSI/ASME B1.20.1.
- Material Thickness to ANSI B16.34
- ANSI B16.5 flanged inlet connection, ½ to 2 inch sizes. 150 lbs
rated to 2500 lbs rated.
- API flanged inlet connections sizes to 2 1/16 inch. 3000psig,
5000psig & 10000psig rated.
Globe Style Needle Value Gland Packing Material.
Standard valves are offered with Graphite. PTFE is also available
as an optional.
Design characteristics :
Floating ball valves present a particular problem with the build up
of static electricity around the ball. All Kelite ball valves have
anti-static devices which provides contact between stem and ball,
and stem and body to eliminate static electricity.
In the event of a fire the valve is required to make a downstream
seal. Even after the disintegration of the RTFE seats, KELITE ball
valves have an excellent metal to metal seal. Special attention has
been paid to the mechanical strength and sealing efficiency of the
central flanged joint in the valve body.
The PTFE gasket packing acts as a primary seal for the unibody ball
valves. The secondary seal has been made out of flexible graphite,
a material with extremely good resistance to fire conditions.
- BLOW-OUT PROOF STEM DESIGN
The combination of stem packingand o-rings guarantee zero emissions
even at a low pressure. The primary seal is made out of flexible
graphite, a material with extremely good resistance to fire
conditions. The anti-blow out stem is inserted from inside the
|Product description||DBB floating ball valve of 1/2"-12" CL150-2500 API 6D, 608 desgin|
|Model||Forging floating ball valve|
|Nominal diameter||NPS 1/2～NPS 12|
|Operating pressure||CLASS 150～CLASS 2500|
|Design standard||API 608,ISO 17292,BS 5351|
|Structural length||ASME B16.10|
|Connecting end||ASME B16.5,ASME B16.25|
|Test standard||API 598|
|Operation method/td>||Handle, worm, motor-drive unit, pneumatic drive unit|
|Application fields||Water, petroleum and natural gas|
|Other remarks 1||A locking device is provided to prevent misoperation of valve.|
|Other remarks 2||Valve stem flyout prevention structure design, to prevent accident
due to flyout of valve stem caused by abnormal pressurization in
|Other remarks 3||Fireproof and antistatic design|
|Other remarks 4||Full bore of valve convenient for pigging, of small flow resistance
and high flow capacity|