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The ORBIT rising stem ball valve is ideal for applications that demand zero leakage and frequent operation. The RING-O subsea valve design is similar to equivalent topside valves, but has additional features to withstand the external pressure caused by the column of seawater at operating depths.
Nov 18, 2022 · Brass NPT 1-1/2 - 2 in. Blowout-proof Stem Extension Kit. Part #FNW320ASEKJK. Item #4448730. $85.18. EACH. Shop for Ball Valve Stem Extensions & Parts at Ferguson. Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and MRO products.
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- What Is A Ball Valve?
- Applications of Ball Valves
- Ball Valve Standards
- Parts of A Ball Valve
- Ball Valve Working Principle
- Pressure Temperature Ratings of Ball Valves
- Double Block & Bleed (DBB) Feature
- Fire Safe Design of Ball Valves
- Fire Safe vs. Fire Tested Design
- Ball Valve Fire Testing Criteria
A ball valve is a type of valve that uses a spherical perforated obstruction (a rotary ball) to stop and start the hydraulic flow. A ball valve is usually rotated 90° (quarter-turn valve) around its axis to open and close. It is one of the most widely used valve types.Ball Valves are suitable for both liquid and gas services. They are highly popula...
Ball valves find application across a wide range of industries due to their versatility and ability to handle various types of fluids, from corrosive chemicals to high-pressure gases. Major applications of ball valves include
Below-mentioned international Codes and Standards are used for Ball valve Design 1. Design Standard – API 6D / ISO 14313 / BS EN 17292/BS 5351/MSS SP 72 2. Testing Standard – API 6D / API 598 / BS 6755 Part I/MSS SP 61 3. Fire testing Standards – As per API 6FA, API 607, ISO 10497, or BS 6755 Part II. 4. Dimensional Standard – ASME B16.10 / API 6D
The housing, seats, ball, and lever for ball rotation are the major parts of a standard ball valve. Refer to Fig. 1 below which shows the internal parts of a ball valve. Ball valves are manufactured with the following crucial parts:
A ball Valve is a rotary motion valve. When the stem (Item 04 in Fig. 1) transfers the motion to the connected ball (Item 03), the ball rotates. This ball of a ball valve is rested and supported by the ball valve seats (item 05). This rotation of the ball over valve seats allows the bore to open or close helping the fluid to flow or stop. For manua...
The pressure-temperature ratings of ball valves are decided based on the valve body and sealing materials used for soft-seated ball valves. Sealing materials may be PTFE, 15 to 25% glass-filled PTFE, FPM, NRG, Celastic, POM, Lyton, and Steel. It is very difficult to pre-determine exact pressure-temperature ratings for all kinds of media under all i...
When the ball valve is in a fully closed or fully open position, each seat seals off the process medium independently at the same time between the up/downstream and body cavity; it allows bleeding of the cavity pressure through a drain or vent valve. This DBBfeature permits in-line periodic inspection of the valves and the checking of sealing integ...
1) Internal Leakage Prevention
1. When non-metal resilient seats are destroyed in a fire, the upstream medium pressure pushes the ball into the downstream metal seat lip to cut off the line fluid and prevent internal leakage due to secondary metal-to-metal seals. 2. Another fire-safe packing is provided at the seat ring for internal leakage prevention to the body cavity. 3. Graphite is normally used as a fire-safe packing material because the melting point of graphite is 1000 degrees C.
2) External leakage prevention
1. All the possible external leakage points between the stem & gland flange, gland flange & body, and body & adapter are sealed with a primary O-ring and then a secondary graphite gasket. When the fire burns out the primary O-ring seal, the secondary graphite gasket seal can prevent the process medium from external leakage. 2. Fire-safe seals are generally not designed for fugitive emission performance (fugitive emission – emissions of gases or vapors from pressurized equipment due to leaks)....
Fire-safedesign is a design that by the nature of its features and materials is capable of passing a fire test.It is capable of passing a fire test with specified limits on leakage to the atmosphere and downstream after being closed subsequent to fire exposure.A fire-tested design is a design subjected successfully to fire testing as per the applicable testing standard.That means the fire-safe valvesare not necessarily fire-tested by the manufacturer.One test valve may be used to qualify valves larger than the test valve, not exceeding twice the size of the test valve.A 16” size valve will qualify all larger sizes.One test valve may be used to qualify valves with higher pressure ratings but no greater than twice the pressure rating of the test valve.The above criteria are acceptable for valves of the same basic design as the test valve & the same non-metallic materials.Nov 17, 2023 · Ball valves are extensively used in industries like: oil & gas, chemical processing, and HVAC systems due to their precision, reliability, and efficiency. They ensure seamless flow control while enhancing system safety and efficiency. This article will discuss ball valves, how they work, applications, diverse types, and critical parts.
Feb 4, 2020 · A ball valve is a quarter turn shut-off valve that controls the flow of fluids by a rotary ball. The spherical rotary ball consists of a straight bore through it. The pipe is in the open position when the bore is aligned in the same direction as the flow, allowing the fluid to pass through it. When the bore is rotated 90 degree from the flow ...
Ball valves are quarter-turn on/off devices. A pivoting ball in the center of the valve controls the flow of liquid or gas media. The pivoting ball is known as a rotary ball, and it is designed with a hole (a bore) in the center. A stem on the top of the ball rotates the ball to open or close the valve. The stem can be turned using manual ...
Oct 1, 2016 · A ball valve is a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. By rotating the ball a quarter turn (90 degrees) around its axis, the medium can flow through or is blocked. They are characterized by a long service life and provide a reliable sealing over the life span, even when the valve is ...
