Split body and Fully welded ball valves
NPS 3/8˝… 56˝ Class 150...2500
NPS 3/8˝… 56˝ Class 150...2500
Ball Valves Product Catalogue.pdf
MAIN CHARACTERISTICSFloating or trunnion mounted, side entry ball valves, split body or fully welded design.
API 6D design, antistatic feature and anti blowout stem system.
Fire-Safe Design: API 607, API 6FA
Installation type: aboveground or underground.
Actuator type: piston actuators (pneumatic, gas-over-oil and electro-hydraulic), electric actuators with mechanical gear (or without gear), manual actuators with mechanical gear, levers, handwheels.
Connection to the pipeline: RF/RTJ (ASME 16.47, ASME 16.5) or BW (ASME 16.25)
MEDIUM CHARACTERISTICS AND MATERIALS OF MAIN PARTS
SEAT INSERTS & SEALS MATERIAL OPERATING LIMITS
DESIGN FEATURES1. FULL OR REDUCED BORE DESIGN
Due to the full bore design cleaning or diagnostic tools can move freely
through the pipeline.
Reduced bore valves can be used in case a system does not require full bore
to accommodate a pig and is not expected to operate at the full capacity
of the pipe.
2. STEM DESIGN
Stem design allows replacing of the upper gasket while pipeline continues its
operation. Antistatic feature is provided in seals design.
3. DRAIN AND SAFETY RELIEF
Safety relief system is designed to prevent the pressure in the cavity from
exceeding 1,33 times the valve pressure rating. Drain pipe is installed
to remove condensates or other impurities from the inner cavity of ball valve.
4. GREASE INJECTION SYSTEM
Valve seats can be equipped with a sealant injection system to provide emergency sealing between seat and ball and stem. The system is designed to allow sealant grease injection while in service; the sealant is distributed at the seating surface between seat and ball.
FULLY WELDED AND SPLIT BODY BALL VALVES
PTPA manufactures fully welded and split body ball valves.
Fully welded body design is more reliable for gas application.
This design allows to minimize the risk of fugitive emissions.
Split body design increases ball valve maintainability, allows to use it
for aggressive working medium and easily replace sealing element if necessary.
Seal tightness for ball valves with floating ball is provided by pressing
the ball to the down-stream seat by the medium pressure.
Seat design provides equal pressure distribution at the ball.
TRUNNION MOUNTED BALL
For trunnion-mounted ball valves seal tightness is provided by pressing the seats to the ball by the medium pressure and springs. Seats constantly contact the obturator protecting it from coke build-up and providing stable tightness class «Zero Leackage» for upstream and downstream service. Body cavity tightness is provided for ball valves for gaseous medium.
Ball valves for liquid media have the system of pressure relief from the body cavity.
When medium temperature is rising and pressure achieves 1,3 PN, the internal pressure is relieved at one of the pipeline ends (with the lowest pressure).
MAIN DIMENSIONSSplit body ball valves, floating ball
Split body ball valves, trunnion mounted ball
Fully welded ball valves, trunnion mounted ball
Ball valves for underground installation