Views: 55 Author: Site Editor Publish Time: 2023-01-29 Origin: Site
Ball valves are essential components of plumbing systems because they can quickly turn to stop the flow of water. With these quarter-turn valves, you can control a lever from the outside to turn off and on the water.
The inability of a leaking Ball valves to function correctly might be a bothersome annoyance. Additionally, dealing with a ball valve leakage can be irritating and could even result in more serious problems. Fortunately, you can attempt a few fixes to solve the issue, though you could eventually require a replacement.
Please Check Beforehand
Before purchasing your industrial Ball valves (as applied to every other thing), a thorough inspection and ball valve test should be carried out to certify them suitable for operation. This is because using the wrong ball valve can cause a lot of damage. To inspect, check that the ball valve ticks the following:
Proper Ball valves Type
First and foremost, what is the ball valve needed for? Where and what will it be installed on? These questions must already have been answered before even deciding to buy the ball valve as the application of the valve determines the type that should be purchased.
Buying the proper valve type is a step towards ensuring a proper working piping system. There are different types of ball valves with each valve having its own suitable applications. Even for ball valves that can be used across a wide range of applications, there is always a particular one it is best compatible with.
To ensure ball valves do not eventually leak after the installation process, it is necessary to buy the most ideal Ball valves to fit right in with no difficulty.
The major types of ball valves are:
Full-note ball valve
Standard Port ball valve
V Port ball valve
True Union Ball valve
Motorized ball valve
Manually Operated ball valve
Sanitary ball valve
Leakage Intolerance
One of the major things to look out for when inspecting a ball valve before purchase is its Intolerance to leakages.
Ball valves are made with different materials and under different conditions, only the ones made from the finest of materials described as being resistant to corrosion should be considered.
A Ball valve’s intolerance to leakages is a clear pointer of how long the valve will be available for active use until it can no longer resist the corrosion and starts to leak.
Operating pressure limit To avoid leakages in the future, the operation limit of the system should not exceed that which the valve is capable of handling. Usually, when the system’s operating pressure gets to about 80-90%, the pressure relief valve starts to exhibit signs of weakness.
Every valve has an operating pressure rating, this is called the Maximum Allowable Working Pressure (MAWP).
The MAWP is the maximum amount of pressure that the valve will let flow through it; this is referred to as the “set first pressure.” When a ball valve is being pushed beyond its limits, or used in pressure conditions higher than the ball valve’s pressure rating, this will affect some crucial parts of the device such as the diaphragm, o-rings, springs and the general operability of the valve.
All ball valves have their own different pressure ratings (indicated in PSI) and only a ball valve with compatible pressure power should be applied to work.
Carry Out Ball valves Testing Procedure Beforehand
An established testing technique and the performance requirements that the valve is anticipated to achieve or exceed are prerequisites for successfully testing a valve. However, there is no one size that fits all when testing requirements in the ball valve testing procedure.
The seat leakage test is conducted in order to check for any leakage in the stainless steel Ball valves. Hydrostatic pressure must be applied to the valve’s intake or outlet on one side, and the quantity of leakage must be measured on the other.
The quantity of leakage in the exit must be measured if the valve’s inlet is being compressed. Leakage up to a certain threshold is acceptable. The two sides must be examined and tested in the same way. Although depending on the type, valves may just have one seat or as many as four.
Reasons That Ball Valve Leaking Internally And Solutions
Leakage Between Actuator And Valve
Score marks on the disc’s surface could mean that the disc was not initially fitted properly if you locate them. Ball valves leaking internally causes the seat layer’s lining to scrape as it closes, which causes leaks. The issue might have gotten worse due to repeated impacts on the leaking surface from solid objects that were launched into the air. Finally, this reduces the lifespan of the ball valve.
The ball valve seat liners should be replaced if the leakage level exceeds the predetermined limit and the seat has numerous faults. To achieve tight sealing, make sure the O-ring has a high pushing action.
Leakage Between Valve Body And Bonnet
One of the most important parts for the ball valves are bonnets. The maintenance team may access the interior machinery and repair leaking Ball valves parts by removing the hood. However, if there are changes in pressure, it can cause a leak between the bonnet and the valve body.
Possible cause
Changes in pressure and heat load may be the reason why there is a leak the bonnet cap and the body.
How to fix
After releasing any trapped fluid, secure the cap bonnet cap to the required torque. Unscrew the valve and look at the surface if the leak persists.