BROEN BALLOMAX, Техническое руководство

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BALLOMAX
®
API 6D Certified Trunnion Mounted Ball Valves - Technical Manual
17
Rev 08/2019
Valve components and materials
Body
The BALLOMAX
®
API Certified Ball Valves can be manufactured in two versions:
•
all welded construction, designed and built to attain maximum strength
and minimum weight, minimizing the potential leak paths.
•
Three piece bolted body.
The body is manufactured of either heavy wall seamed carbon steel pipe, Cast
Steel Pipe, A-105 Forged Steel, or A350 LF2 material depending on Pressure,
Media, and or Temperature. The valve is suitable for both above ground and
direct buried applications.
Ball
The ball is full port (API 6D), made of High strength Carbon Steel A-350 LF2,
ground to specific tolerances, with Electroless Nickel Plating (ENP). Additional
special materials available upon request.
Trunnion mounted ball design
All BROEN Ballomax API 6D certified valves are all Trunnion Mounted type.
The sealing principle is that the trunnion supported ball surface mates with the
piston spring loaded HNBR seats on both sides of the Ball creating a double
blocking design. This is especially desirable in High Differential pressure
applications to eliminate high torque in the operations of the valve. BALLOMAX
Standard Trunnion Mounted valves come equipped with a Bleed / Drain port to
vent the body of the valve in 100% open or closed position.
Vent and Drain
A vent port on the upper quadrant and drain port in the lower quadrant are
provided to be able to test the integrity of sealing and drain the valve body, in the
full open or full closed position, or to remove any external materials from the
seats area.
Seat
We offer two seat designs:
•
SPE, single piston effect, with self-relieving seats: an over-pressure in the
body cavity is release across the seat on the side of lower pressure
(typically downstream).
•
DPE, double piston effect: an over-pressure in the body cavity is trapped
and not released. The installation of an external relief system is
recommended.
Both seats are PMSS (Primary Metal and Secondary Soft Seats), where the
primary metal seats protects the soft materials from external materials in the
fluid, thus ensuring extended valve lifespan. The soft HNBR o-ring ensures
bubble tight operations, even at cold temperature (-40
°
F/-40
°
C).