Application of Full Welded Ball Valve:

1: Oil, gas and pipelines;
2: Compressor measure and reduction stations
3: Gas storages

4: Plants and vessels in the oil, gas and petrochemical industy

5: Liquid gas

6: On and off shore platforms

7: Ship building

8: Power plants

9: District heating & steam

10: Scraper launch and recieving stations

Information:

Design: Fully welded body.

Soft, metal-to-metal or primary metal secondary soft seated

Nominal size: from1/2 to 32 inch

(bigger sizes on request)

Nominal pressure: PN10-420/ANSI class 150 - 2500

Temperature range: -50°C up to +280°C

Design Features:

BYHO full welded ball valve fullfil the requirements of the most common national and international standards as below:

Trunnion mounted ball: The standard design of BYHO ball valves provides

a trunnion mounted ball for the nominal sizes 3 inch and higher. The maintenance-free bearings for stem and trunnion are self-lubricating, thus assuring a lower torque especially for high pressure ratings.

Seats: Spring energized

Metal or soft seated: The BYHO ball valves provide spring supported seats as a standard. The seats are pressed against the ball surface by the spring elements and ensure a tight shut-off at low line pressure. In addition the sealing effect is assisted by the pressure in line. So the total sealing force is the sum of the spring force and the force resulting from the pressure which increases pro-portionally with the line pressure.

Double Block and Bleed: The cavity can be relieved via vent or drain connections at the body. The independent upstream and downstream sealings ensure a tight shut-off at the body cavity in fully opened and closed position. This allows for verifying the tightness of the ball valve in line via the cavity.

Anti blow out stem: The sealing of the stem to the atmosphere is achievedby three independent sealing systems. The stem sealing design ensures the anti-blow-out function. Therefore, the three stem sealings are easily replaceable under full line pressure in open or closed position.

Stem seals: removable stem seals under full line pressure in fully opened or closed position.

Anti static device: The ball valve design includes an electric conductive connection between the internal parts of the ball valve and the body, providing the anti-static function.

Fire Protection: The design assures the fire safe requirements in accordance with the international standards as API 6FA, API607 und BS 6755 P 2

Self-relieving Seat Design: This seat system is designed to automatically vent any excessive build-up pressure in the body cavity. The floating seat design allows for relieving the overpressure in the pipeline.

Bi-directional Seating System: At this design, each seat ring will provide a total sealing in both directions. This system does not enable the self-relieving of the excessive pressure in the cavity. This allows for verifying the tightness of the ball valve in line by bleeding or pressurizing the cavity.