Angle valves are one of the most basic materials used in sanitary and industrial uses. It has been marked as one of the widely used essentials for various needs. There are many ways we adopt to maintain and check their performance. It helps increase the working life of the product.
Industrial Angle valves still need a lot more Precision. This is because the materials handled there are often sensitive.
The angle valves should work efficiently to let the reactions go smoothly. It assures the safety and the flow of the angle valve. A vital method performed in this regard is the Pressure Test method. Let’s understand what a pressure test method for angle valves is.
Pressure Test Method for Angle Valves:
Valve tests are performed to check out the durability of the angle valves. It has different parameters and testing methods upon which it depends. A valve needs to have enough strength to undergo medium pressure. The test would display if a valve can bear standard pressure and not be subject to leakage. The main parts of valves should be free from any cracks, corrosion, or other defects.
The pressure test method is the most widely applied for such a purpose. It works perfectly for industrial and domestic valves, yet the former is essential.
The pressure Test method works by applying considerable pressure. It applies a liquid to each part of the valve or the entire. It displays if any leakages occur. The valve performance and its working are measured to a certain pressure level. When no leakage occurs, the vaLve is said to qualify for the pressure test.
Every angle valve type should fulfill its needs to meet certain qualities.
Therefore, different pressure test methods for various angle valves of different types. Let’s discuss them to get a better understanding of the concept.
4-way angle valve
water pressure of angle valve
Pressure Test Method for Globe Valves:
Globe valve is used for commercial and domestic uses. The valve is placed in a test rack where its disc is kept open during this pressure test. The valve is then tested by injecting test liquid into the valve body. It checks out valve leakages. We can also perform this test on every single piece of the valve. It will give an estimate of the structural stability of the valve.
The stem lies in a vertical state during the test in shut-off valves. The flap of the valve remains open, and then the test medium is entered from the downside of the flap. This process checks the packing and gasket of the valve. Later, close the flap and inspect the other ends when done.
The valve tightness tests are performed by lowering the pressure to a certain level. It reveals leakages and cracks. Then, the outer end is opened by closing the valve flap to check its condition.
Pressure Test Method for Ball Valves:
Due to its shape, the ball valve pressure test is conducted with the half-opened body of the angle valve. As its shapes vary, there is more than one way of performing this test.
Floating Ball Valve Test.
As the name indicates, the ball valve structure is not entirely fixed to the stem and appears to float in the air. For this purpose, first, get the valve in half-open condition. Enter the test liquid from one of its ends and close the other. Now, keep rotating the valve. Open it is closed-end and inspect the outer surface of the valve. The valve test qualifies if no leakage or cracks appear there. You can perform the same test on another end of the valve for inspection.
Fixed Ball Valve Test:
This ball valve has all its parts tightly held with the stem. Rotate the ball valve and close the fixed ends. Now, add the test medium to the valve across the ends. You can find the sealing efficiency with the help of a pressure gauge. Check and measure the pressure and inspect for cracks.
Repeat the same phenomena with the other end of the valve. After that, close both ends and fill the central cavity with the test medium. It will help check the gasket and packing. If the ball valve is three-dimensional, Check for each side carefully.
Pressure Test Method for Gate Valves:
Gate valves are the most commonly used valves in industries. The procedure for the gate valve test relates to that of the globe valve. Here is how we can perform the test.
First, open the valve to increase the pressure inside of it. Then, swiftly remove the gate valve to test its strength and find any leakages. You can enter the test medium directly into the plug of the valve. It is an intermediate level of pressure testing suitable for a specific gate valve type.
This test can be performed in another way. Open the gate of the valve; it will raise the teat pressure. By closing the gate and opening the blind plate from one end, you can measure the leakages on the surface. Now, you can repeat the same process for the second end of the gate.
Pressure Test Method for Butterfly Valves:
Butterfly valves are commonly used for domestic purposes in bathrooms and kitchens. You can efficiently perform pressure tests for examination of your angle valves. By keeping the butterfly plate open, inject the test medium from the inlet end and the outlet closed. After checking this site carefully for leakage and scraps, close this end. Repeat the same process for the other end by closing the inlet and inspecting the defects there.
Pressure Test Method for Check valves:
Check valves are used to make the fluid flow in one direction only. You can find check valves in your bathrooms and kitchen. To perform the pressure test method, keep the disc axis of the check valve at 90°to its horizontal structure. It makes them parallel to each other.
Enter the testing material from the outlet. Check out defects and craps on that side. Now, You can check the sealing strength by injecting the medium from the inlet of the check valve. The valve is in good condition if you don’t notice any leakage.
Pressure Test Method for Plug Valves:
The testing material is entered from one end for plug valves while its other ends are closed. Now open the plug into its working position and check for inspection. If no defects appear, it will let you know that the valve has qualified for the test.
Close the plug with moderate pressure around the valve cavity and body to check valve sealing strength. You can examine the plug. Now, rotate the plug along the half diameter and repeat the process. It should maintain pressure across the end and cavity. You should measure the pressure from both ends at the corresponding times.
One valve flap should be kept open and the other closed during the test. Then, the test media is added from the open end of the valve. Check for the outcomes as the pressure rises to a specific value in the valve. If no leakage occurs, your valve is suitable to work.
Pressure Test Method for Safety Valves:
Safety valves are frequently installed in sensitive places. Their test procedure is similar to that of other angle valves. To start with the test, close the inlet end to examine the lower surface of the safety valve. Test the upper surface and immediate outlet opening by injecting media simultaneously. It tests the valve body for any damages.
A sealing test of the safety valves should be performed at a normal pressure range. To detect the leakage, seal the joint of the safety valve. Now coat the thin paper on the outer side with the butter. If you notice a bulging in the paper, the valve is leaky. You can also check this by putting a plate seal on the lower side of the outlet. Seal the disc with water filling. If no bubbles appear, your valve has no leakages and works well.
A Summary of Pressure Test Method For Different Brass Valves:
This writing aims to teach you about the pressure test method you can perform on different angle valves. It has great significance when it comes to regulating the valve structure. The methods are discussed easily for those who feel it is challenging to use technical terms.
Depending upon the type and structure of the angle valve, you can perform a specified pressure and sealing test. It assures that the valves are well maintained and up to the mark. Safety is a priority for industrial valves as it can cause significant trouble. To alleviate these hazards, you should perform angle valve tests regularly with Precision. It will add worth to your valves.