Liquid Fuels Systems-cdc3e452 (Vol.4)

When removing a manual valve from a pipeline, the bolts on the bottom of the valve should be loosened first to drain the fuel drip pan. Loosening the bottom bolts will allow any fuel or liquid in the valve and drip pan to flow out, preventing spills or leaks during the removal process. By starting with the bottom bolts, the fuel can be safely drained before proceeding with the removal of the valve.

A globe valve can be used to control the rate of product flow. Globe valves have a spherical-shaped body with an internal baffle, which creates a tortuous path for the fluid to flow through. By adjusting the position of the valve's disc, the flow rate can be regulated. This makes globe valves suitable for controlling the rate of fluid flow in various applications, including industrial processes and pipelines.

Ball valves are used in fuel systems and must be fire tested and qualified according to API standard 607. These valves operate from fully closed to fully open with a 90-degree rotation of the ball. Therefore, the correct answer is ball.

When a slight leak is noticed on a mechanical seal that has just been installed, the appropriate action to take is to allow reasonable time for the seals to adjust. This is because mechanical seals require some time to settle and form a proper seal. By allowing time for adjustment, the seals may tighten and the leak may stop on its own. Replacing the O-ring or the entire seal immediately may not be necessary if the leak is minor and can potentially resolve itself with time. Restarting the pump or replacing parts may not address the issue and could potentially cause further damage.

As-built drawings are detailed diagrams or blueprints that show the exact layout and configuration of a system or structure as it was constructed. These drawings typically include information about the location and operation of valves, pipes, and other components. Therefore, consulting as-built drawings would provide the necessary information to identify which valves need to be isolated before removing a manual valve. This is because the as-built drawings would accurately depict the current state and arrangement of the valves in the system.

When aligning an API 610 pump shaft and motor shaft, the maximum tolerance allowed is 0.002 inches. This means that the misalignment between the two shafts should not exceed 0.002 inches.

The frequency of inspecting a gate valve for leaks depends on its condition and usage. If there are signs of leaks or if the valve is frequently used, it should be inspected more often, possibly on a weekly or monthly basis. However, if the valve is rarely used and there are no visible signs of leaks, it may not require regular inspections and can be inspected as required. The answer "As required" indicates that the inspection frequency should be determined based on the specific circumstances of the gate valve.

Teflon string is used as packing around the valve stems of globe valves. Teflon, also known as polytetrafluoroethylene (PTFE), is a synthetic material that is highly resistant to chemicals, heat, and friction. It is a popular choice for valve stem packing because it provides a tight seal, prevents leaks, and reduces friction between moving parts. Teflon string is flexible and can be easily wrapped around the valve stem to create a reliable seal, making it an ideal choice for globe valves.

A 12-inch non-lubricated plug valve will have a worm gear operator. A worm gear is a type of gear mechanism that consists of a screw-like gear (worm) and a wheel-like gear (worm wheel). This type of operator provides a high gear ratio, allowing for precise and controlled movement of the valve. It is commonly used in applications where manual operation of the valve is required, especially in cases where lubrication is not possible or recommended.

Butterfly valves require the least amount of space compared to other types of valves. This is because they have a compact design and a simple mechanism that allows for easy installation and operation. The disc of the butterfly valve is positioned in the center of the pipe, allowing for a straight flow path and minimal obstruction. Additionally, butterfly valves are lightweight and can be installed in tight spaces, making them a preferred choice when space is limited.

If the centrifugal pump binds after replacing parts in the self-priming pump portion of a Gilbarco(R) pump, adding a paper-thin gasket can help resolve the issue. This gasket can create a small separation between the parts, allowing them to move freely and preventing binding.

rising stem and non-rising stem

During repacking, a gate valve should be placed in the closed position. This is because repacking involves replacing the packing material around the valve stem to prevent leakage. By closing the valve, it ensures that the flow of fluid is completely stopped, allowing for safe and effective repacking without any risk of leaks or accidents. Placing the valve in any other position, such as open or intermediate, would not provide the necessary safety and stability required for the repacking process.

Teflon is the best type of packing for large gate valves. Teflon is known for its excellent chemical resistance, low friction, and high temperature resistance. These properties make it ideal for use in valves where it can provide a tight seal, prevent leaks, and withstand harsh operating conditions. Nylon, graphite, and multi-layered cardboard do not possess the same level of durability and resistance as Teflon, making them less suitable for this application.

The amount of fuel in a pipe can be calculated using the formula for the volume of a cylinder. The formula is V = πr^2h, where V is the volume, r is the radius, and h is the height. In this case, the radius is half the diameter, so it is 3 inches. The height is the length of the pipe, which is 22 feet. Converting the measurements to the same unit, we have a radius of 0.25 feet and a height of 22 feet. Plugging these values into the formula, we get V = π(0.25)^2(22) = 33 gallons. Therefore, the correct answer is 33 gallons.

Lithium-based grease is used to lubricate the ball bearings of the Blackmer pump. It is applied using a hand-pressure gun.

A closed impeller in a centrifugal pump is the most efficient and develops the highest pressure. This is because a closed impeller has a shroud that covers the entire impeller, preventing any fluid from escaping backwards. This design allows for more efficient transfer of energy from the rotating impeller to the fluid, resulting in higher pressure. Additionally, the closed impeller design reduces the risk of cavitation, which can negatively impact pump performance.

The API 610 pump is a single stage centrifugal pump with a radial split case design. It has an end suction and top discharge configuration.

The standard opening rate for the 81AF-8, nonsurge check valve is 20 seconds. This means that it takes approximately 20 seconds for the valve to fully open once it is activated.

Directly pumping into a storage tank would not require manual bleeding of air out of the pipeline after a valve is replaced. This is because the storage tank acts as a reservoir where any air can naturally rise to the top and be vented out, without the need for manual intervention. Pumping through a meter, fill stand, or filter/separator would not provide the same capability to release trapped air, hence manual bleeding would be required in those cases.

When reverse flow occurs to an 81AF08, nonsurge check valve, fuel gets to the cover chamber of the hytrol check valve through a drilled passage.

After changing the elements of a filter/separator, it is important to record the next due date for when the elements need to be changed again. This ensures that the filter/separator is properly maintained and the elements are replaced at the appropriate time. Additionally, the maximum allowable differential pressure should be recorded. This is the maximum pressure difference that the filter/separator can handle before it needs to be serviced or replaced. Recording this information helps monitor the performance of the filter/separator and ensures it is operating within safe limits.

Blind flanges are specialized equipment that must be used to ensure system integrity when removing a valve from the system. Blind flanges are solid disks used to close off a pipeline or vessel opening. They are designed to prevent any flow through the system while maintenance or repairs are being carried out. By using blind flanges, the system is effectively sealed and protected from any potential leaks or contamination during the valve removal process.

The main difference between the internal gear pump and the external gear pump lies in where the fuel flows. In an internal gear pump, the fuel flows between the teeth of the gears and the inner surface of the pump housing. On the other hand, in an external gear pump, the fuel flows between the teeth of the gears and the outer surface of the pump housing. This difference in flow path affects the efficiency and performance of the pumps.

To remove the valve operator of a General Twin Seal plug valve, the valve must be in the closed position. This is because in the closed position, the plug is fully engaged with the valve seat, creating a tight seal and preventing any flow through the valve. By removing the valve operator in this position, maintenance or repairs can be performed without any risk of leakage or flow.

When reinstalling a manual valve, it is recommended to insert the bottom bolts first. This is because the weight of the valve can be better supported when the bottom bolts are secured first. By starting with the bottom bolts, it ensures that the valve is properly aligned and positioned before securing the remaining bolts on the top, left side, and right side.

A screwdriver is used to remove the seals and bearings from the head of a rotary-vane type pump. This tool is commonly used to loosen and remove screws or fasteners. In the context of a pump, a screwdriver can be used to unscrew and remove the components that hold the seals and bearings in place, allowing for their removal and replacement if necessary.

A double block and bleed plug valve is designed in such a way that it can isolate the pipeline on both sides of the valve, and also has a bleed valve to release any trapped pressure between the two blocks. This means that during hydrostatic testing, the valve does not need to be removed from the pipeline as it can effectively isolate the section being tested and also release any pressure if needed.

Before working on a fuel system that could interfere with the base flying mission, you must notify the Resource Control Center. This is because the Resource Control Center is responsible for managing and coordinating the use of resources, including fuel, on the base. They need to be informed about any work that could potentially affect the availability or functionality of the fuel system to ensure that it does not disrupt the base's flying mission.

The filter/separator pressure relief should be set at 137.5 psi. This is because the maximum operating pressure of the fuel system is 125 psi, and the pressure relief should be set slightly higher than this to ensure that it activates before the system reaches its maximum pressure. 137.5 psi provides a safety margin while still allowing the system to operate within its designated limits.

Ball valves do not have a specific inspection schedule as their frequency of inspection depends on their usage and condition. They should be inspected for ease of operation and leaks whenever there are signs of malfunction or when routine maintenance is being conducted. The frequency of inspection may vary based on factors such as the type of fluid being controlled, the environment in which the valve is installed, and the manufacturer's recommendations. Therefore, ball valves should be inspected as required, rather than on a fixed schedule.

When removing the KMU-416/F modification kit with nine additional elements, you need to remove six elements from the front side to balance the manifold. This means that there were originally six elements on the front side that needed to be balanced out by the nine additional elements from the modification kit. By removing six elements, the front side will be balanced again.

The number of column-shaft sections a deep-well turbine will have is determined by the distance between the pump tank flange and the tank floor. This is because the column-shaft sections need to be long enough to reach from the pump tank flange to the tank floor in order to properly function. If the distance between these two points is too large, more column-shaft sections will be needed to cover the distance. Conversely, if the distance is smaller, fewer column-shaft sections will be required. Therefore, the distance between the pump tank flange and the tank floor directly affects the number of column-shaft sections needed.

The newest filter/separator modification requires a total of 30 cartridges for a 600-gpm filter/separator. This suggests that the modification involves a significant increase in the number of cartridges compared to previous versions. The higher number of cartridges is likely necessary to effectively filter and separate the fuel at a flow rate of 600 gallons per minute.

The correct answer is 2.27. Coalescers in an API 1581 filter/seperator are rated for a minimum flow rate of 2.27 gallons per minute (gpm) per inch of length. This means that for every inch of coalescer length, a minimum flow rate of 2.27 gpm should be maintained to ensure efficient coalescing of liquid contaminants.

When gravity-filling a horizontal filter/separator from another horizontal filter separator, it takes approximately 10 minutes for the two filter/separators to equalize. During this time, the liquid levels in both filter/separators will balance out, ensuring a consistent flow of liquid between the two.

The normal flow of fuel through a strainer is from the center to the outside. This means that the fuel enters the strainer through the center and then flows outwards towards the edges of the strainer. This flow direction helps to filter out any contaminants or debris present in the fuel, ensuring that only clean fuel reaches the engine.

When the float in a vertical filter/separator raises to the TOP position, the fuel discharge valve closes. This is because the float rising to the top indicates that the filter/separator has reached its maximum capacity and needs to be emptied. Closing the fuel discharge valve prevents any further fuel from flowing out and ensures that the fuel remains in the filter/separator until it can be drained.

A globe valve is the manual valve that can be repacked while the line is under pressure. This is because a globe valve has a disc that moves perpendicular to the flow of the fluid, allowing for easy repacking of the valve while the line is still pressurized. In contrast, other types of valves such as ball valves or plug valves require the line to be depressurized before repacking can be done.

To speed up the opening time of an 81AF, nonsurge check valve, you must turn the check valve (CV) flow control adjusting screw clockwise to increase. This means that by turning the screw in a clockwise direction, the flow control will be increased, resulting in a faster opening time for the check valve.

A butterfly valve must be fully closed before it can be removed from the pipeline. This is because a butterfly valve operates by rotating a disc in the pipeline to control the flow of fluid. In order to remove the valve, the disc needs to be in the closed position to prevent any leakage or flow of fluid. Once the valve is fully closed, it can be safely removed from the pipeline for maintenance or replacement.

A rotary-vane type pump has a built-in pressure control valve. This type of pump uses rotating vanes to create suction and move fluid. The built-in pressure control valve helps regulate the pressure within the pump, preventing it from exceeding a certain level. This feature is useful in applications where maintaining a specific pressure is important, such as in hydraulic systems or fuel delivery systems.

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If the swing check valve disc is stuck off its seat, it means that the disc is not properly seated and is not able to control the flow of fluid. This can cause the valve to open too rapidly or have no control over the rate of opening. When the disc is stuck off its seat, it can allow the fluid to flow freely without any restriction, leading to rapid or uncontrolled opening of the valve.

The new CF21 flange differs from the old pilot valve assembly in that it has a float that floats on fuel. This means that the float is designed to stay on the surface of the fuel, allowing for better control and regulation of the fuel flow. This is a significant difference from the old pilot valve assembly, which may have had a different type of float or mechanism for controlling the fuel flow.

Non-lubricated plug valves do not require regular inspections for ease of operation and leaks like lubricated valves. Instead, they need to be inspected and maintained as required based on their specific usage and operating conditions. This means that the frequency of inspections will depend on factors such as the valve's age, usage, environment, and any signs of potential issues. Regular monitoring and maintenance are necessary to ensure optimal performance and prevent any potential leaks or operational difficulties.

In order to conform to API Standard 6D, the seat and disc of a Check valve must be removable without removing the valve from the pipeline. This means that the Check valve can be maintained and repaired without having to shut down the entire pipeline system. Gate, Plug, and Globe valves do not have this specific requirement, so they would not be the correct answer in this case.

A Gillarco self-priming pump is capable of removing air at a rate of 18 gallons per minute. This means that the pump is able to effectively remove air from a system or container at a speed of 18 gallons per minute. This rate is important in applications where air removal is necessary, such as in water or fluid transfer systems, to ensure efficient and effective operation.

If the downstream manual valve is closed, it will prevent the flow of fluid or air, causing the 81AF-8 nonsurge check valve to fail to open. The downstream manual valve acts as a barrier, blocking the passage of fluid or air and preventing it from reaching the check valve. As a result, the check valve cannot open and allow the flow to pass through.

The pilot valve assembly is the correct answer because it is the central component of the water drain system. It controls the flow of water and is responsible for draining excess water from the system. The other options, such as the fuel discharge valve and auxiliary control valve, are not directly related to the water drain system. Therefore, the pilot valve assembly is the most appropriate choice for the hub of the water drain system.