A gas ball valve is a quarter-turn valve with a hollow, punctured ball as the closing part. The ball has a port, or hole, in the middle that controls the gas flow when the valve is opened or closed. The valve opens and lets gas flow when the ball lines up with the pipe or tube. When the ball is turned so that it is not in the flow line, on the other hand, the valve closes, and the gas flow stops.
Due to their durability, gas ball valves suit applications requiring rapid gas flow control. These are emergency shut-off systems or process control operations. Gas ball valves are used in piping systems to transport liquid petroleum gas (LPG), natural gas, and hydrocarbons. These valves regulate fluid flow within systems used for residential or industrial applications. They are an effective way of controlling the fluid movement in devices used in homes, companies, and workstations.
Why Do We Select Gas Ball Valve?
- Simple to Use
If you turn the lever or handle 90 degrees, you open or close the valve. It is an easy and effective way to control the flow of gas.
Gas ball valves are an adequate way to turn off a system. Still, it enables you to control gas flow safely. They are made to handle a lot of pressure. When this valve is closed, it stops gas leaks effectively.
- Minimal-Pressure Drop
When it’s fully open, it lets flow through straight through. This might lead to a slight drop in pressure across the valve. This helps keep the system working well and lowers the energy it uses.
There are several essential things to consider when choosing a gas ball valve. These are the type of gas, the working pressure, and the temperature. You also think about how well it will work with the tool you want to use it with. It’s also vital that the proper safety rules and standards are followed.
Usually, strong materials are used for producing gas ball valves. These are things like brass, polished steel, and cast steel. These materials don’t rust or corrode. Because of this, they can be used in a wide range of gas applications and situations.
What Makes Gas Ball Valves Different?
In several applications, gas ball valves’ performance beats other valve types. In place of heavy brass gas valves, gas ball valves are a lightweight and space-saving choice. These ball valves provide optimal performance in hydrocarbon systems. Moreover, it helps in vapor and gas systems and is available in many designs to meet needs.
Most gas ball valves are quarter-turn valves. This makes them simple, and the rotating ball mechanism ensures a tight seal. The valve controls the flow of many different liquids and gives a leak-proof seal when closed. Ball valves are the most convenient option when connecting devices with tubing.
Brass ball valves are reliable in a wide range of high-temperature and high-pressure conditions. Quick opening and closing durations make gas ball valves ideal for regulating high-pressure flows.
What are the Special Features of Gas Ball Valves?
- Pilot Tap
Figure 2 Pilot tap
A pilot tapping is on certain gas valves to ease the pressure gauge installation. This is used for monitoring and/or testing the system pressure. A gauge within the valve provides the highest degree of pressure precision. It guarantees the optimal operation of the system. A typical 1/8″ female pipe thread, also called an FPT, is utilized for the tapping. An impermeable seal is produced when a 3/16″ Allen wrench tightens the 1/8″ male pipe thread (MPT) connector with a tapered brass seat.
- Yellow Handle
Figure 3 Gas ball valve with yellow handle
The handles of the majority of gas valves on the market are yellow. It indicates that gas approval has been obtained. While not a complete fact, this can serve as a prompt visual sign. Always verify that a gas valve possesses the operating licenses before using it.
- Fire-Safe Design
Figure 4 Gas ball valve fire safety feature
Most gas ball valves are built in a way that keeps them safe from fire. It makes you safer in case of a fire or when you’re in very hot or cold conditions. Metal-to-metal seals and fire-resistant materials, such as graphite, are used in this design. This keeps the seal from leaking and stays strong even in high-temperature situations. In most metal-metal seals, two metal sides touch each other. These are the stem, valve body, or the ball and valve body. The metal-on-metal contact makes a seal that can handle high temperatures and pressures. So they lower down on the chance of leaks.
- Stem and Seat Sealing
As a rule, gas ball valves have improved stem and seat sealing mechanisms. It provides gas leakage reduction and ensures a secure shut-off. This includes spring-loaded seats and live packaging assembly. Alternative sealing technologies reduce the risk of gas leakage while preserving the integrity.
- Anti-Static Design
Anti-static features are incorporated into gas ball valves. It prevents static electricity from accumulating in gas applications, which is hazardous. Conductive materials and grounding springs are two specific examples. The static charge that may occur during valve operation is dissipated.
- Extended Bonnet
The extended canopy provides the stem and packaging with more insulation and protection. It permits the reliable functioning of the valve in high temperatures.
Advantages and Disadvantages of Gas Ball Valves
With few disadvantages, ball valves offer a variety of pros for industrial gas system applications. Among the benefits of selecting a ball valve are:
Versatility: Operates in a vast array of industrial applications
Efficiency: Achieves a bubble-tight closure while operating at minimal torque
Affordability: Lower price compared to valves of comparable classification
Ease of use: The lightweight and compact design eliminates installation and operation obstruction.
Maintenance: Reliable performance and straightforward repairs
Strength: Reliable operation in high-volume, high-temperature, and high-pressure applications
Durability: Robust construction that provides an extended facility life
Gas ball valves exhibit drawbacks when utilized in high-velocity flow and throttling applications. These uses speed up valve erosion and result in premature failure. Employing an unsuitable ball valve for the given fluid may hasten its deterioration. A diverse selection of ball valves is accessible to accommodate many distinct applications.
What Is the Gas Ball Valve Ratings?
Every country has a group whose job is to ensure that the designs and ratings of ball valves are safe. One example is that the CSA sets different values for gas ball valves inside and outside. Standardized European Standards are used to develop and rate these valves in Europe. Make sure to check these numbers with the government of your country.
- Rating For Indoor Gas
1/2 psi is the CSA gas rate for gas ball valves used in heaters and stoves. The 5G is also used for gas ball valves in home pipes. Inside valves have the same numbers in the US and Canada.
- Rating For Outdoor Gas
In Canada and the US, CAN 3.16 and BRS125G say that a gas ball valve must be cleared before it can be used outside. These rates are for all valves with flanged or welded ends that can be closed by hand or with a tool. It will work at temperatures between -10480F and 32720F and up to 125 psi.
In the EU, the Gas Appliance Regulation ensures that gas stoves are safe and good for the environment. If a business wants to sell something in the EU, it has to follow these rules. Harmonized European Standards give them choices to help them reach and meet their goals. These rules say they can’t sell their gas ball valves if they don’t meet them.
Main Applications of Gas Ball Valve
Gas ball valves are used in various industries and residential applications. It helps in regulating, isolating, and controlling gases are essential. The following are some frequent uses of gas ball valves in particular gas systems:
- Industrial Gas Systems
In industrial gas systems, ball valves are indispensable for gases like oxygen, nitrogen, and argon. They ensure security and control in gas storage facilities, distribution networks, and production plants. It facilitates laboratory applications, welding operations, and manufacturing processes.
- Liquefied Petroleum Gas
Ball valves are used in residential, commercial, and industrial LPG systems. They help operate storage containers, cylinders, distribution networks, and heaters, ensuring regulation and securing LPG deactivation.
- Gas and Oil Industry
Gas ball valves regulate the flow of natural gas, methane, and other hydrocarbons throughout extraction. It helps in processing and distribution in pipelines, refineries, and petrochemical plants.
- Gas Medical Systems
Gas ball valves are utilized in medical gas systems to distribute and regulate various gases in medical facilities.
- Size of Gas Ball Valve
Gas ball valves have various sizes to perform their functions. Gas valves typically have connection port sizes.
What Makes The Gas Ball Valve Unique From Other Ball Valves?
Some things about it are the same as other ball valves, but a few crucial changes make it safe for gas use. The ports on gas ball valves are usually smaller than those on liquid ball valves. This is because gas flow usually needs less room and can be managed well with smaller holes.