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8/12/2019 Two-Piece Mounted Trunnion Ball Valve
1/3Web-site:www.valve-made.com E-mail:[email protected]
Two-piece Mounted
Trunnion Ball Valve
BIAOYI
R
1
Two-piece,split Body,cast Steel,trunnion Mounted Design
This series ball valves are trunnion mounted supported
which provide excellent tightness over an extensive range
of temperatures and pressures.They are available in size
from 2 to 24and offers ANSI class rating 150 to 2500,
Valves are designed and manufactured in conformance
with specification of API 6D,fire safe tested to BS 6755
Register that qualify this series of valves for virtually
all
oil and gas services.
All BIAOYI series ball valves are featured with trunnion
mounted ball and unique spring loaded seats which
provides bubble-tight shut off and low operating torques
even at low different pressure. A large trunnion design
ensures central positioning under the highest working
pressure.
EmergencySealant lnjection Fittingprevent leakage from
thestem
Blow-outProof Stemlnternally
insertedand functionedasthe
backseat for assuredstem
sealin
sealingatallpressures
EmergencySealantlnjectionFittingprevent
leakage from theseat
Drainplug
Release thebodycavity
DoubleSealingO-rings
Prevent leakagefromstemarea
O-ring & Gasket Combination
Prevent leakage from body join area
FloatingSpringLoaded
seats toassuresealingevenat lowpressures
Metal-to-Metal SealingWhennon-metalsealing
isdeterioratedbyfire,
seat floats toshutoff the linefluid
temperature ratings from -46 to 250 .
and API 6FA have been witnessed and certified by Lloyd' s
This is a typical BIAOYI series BT trunnion mounted bal valve il
ustrated cross-section drawing which is only for demonstrating of
basic design features.The actual
product design may be slightly dif erent from this sample
drawing due to its size and pressure class.
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8/12/2019 Two-Piece Mounted Trunnion Ball Valve
2/3Web-site:www.valve-made.com E-mail:[email protected]
BIAOYI
R
Anti Blow-out StemThe stem is made separately from the ball; The
lower end of the
stem is designed with an integral collar to be
blowout-proof.
Anti-static DeviceAntistatic device is a standard feature of
BIAOYI ball valve.A
spring-loaded pin assures the electrical continuity, between
ball,
stem and body, so as to avoid sparks during turning of the stem
to
open and close the valve, which could be dangerous in case
of
Super Fire Safe Design
External leakage prevention
Leakage from the valve stem area is prevented by
double sealing with 2 O-rings and gland
gasket.Leakage through the valve body joint is also
blocked by double sealing with O-rings and body
gasket.After a fire has deteriorated O-rings,gland
gasket,body gasket and stem firesafe packing are themeasure that
prevents external fluid leakage.
Internal leakage prevention
When non-metal materials such as O-rings,seat insert
and spacer are decomposed or deteriorated by
fire,the edge of the metal seat preloaded by the seat
spring comes into contact with the
Ball to shut off the line fluid to minimize internal leakage
through the valve
bore.Also the fire safe flexible graphite seat packing will be
compressed by
the seat spring to prevent fluid leakage between the valve body
and the seat.
2
After Fire
Metal-metal
contact
Before Fire
O-ringBall
Seat springSeat fire safe packing
Seat insert
Seat
Spacer
Top Flange
Gland
Body
Stem
Stem firesafe
packing
Gland gasket
Ball
O-ring
ClosureBody gasket
Stem fire safe packing
Gland
Body
Ball
Grounding plunger
Gland gasket
Top FlangeStem
O-ring
Anti-static spring
hazardous area installation.
Trunnion Mounted Ball
Design Feature
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8/12/2019 Two-Piece Mounted Trunnion Ball Valve
3/3Web-site:www.valve-made.com E-mail:[email protected]
BIAOYI
RTrunnion Mounted Ball
Design Feature
3
Drain plug vent valve
upstreamseat
Body cavity Body cavity
Body
Closed ball Downstream seat
Emergency Sealant Injection System
Cavity Pressure Relief
When cavity pressure (Pc)is lower than seat spring and line
pres-
sure (Pl),i.e. P*D1
