Design


The design of the non-floating ball of ValvTechnologies has been proven on-site for more than two decades and consists of 11 key elements.

Body of the Vanne: Houses all the main components.

Ball: Pivot at 90 degrees, ensuring zero leakage with the use of our layer


infused with chromium carbide. Although the entire exterior is coated, only one side of the ball can ensure the sealing vis-à-vis the downstream cup. The Exact positioning of the ball is essential for a waterproof closure.


Tip: The room at the back of the valve includes the full cup that is tangled with the sealed side of the ball. This cup is coated with chromium carbide and wrapped in good finish ensuring zero leakage.


Upstream Tasseau - Spire Belleville:

These two components are located upstream of the ball and keep it both focused on the middle line and the vertical centerline. The Belleville Spire provides a load against the ball to ensure permanent contact with the cup so that no foreign debris can penetrate. Although the cup upstream is consistent with the radius of the ball, it does not provide a watertight closure, as it is not coated with the carbide of the ball and the sealing cup. However, it is coated with nitrous to increase resistance to wear. It is very important to understand that this design only seals in one direction and that the Prolonged pressure in the opposite direction can damage the valve.

Body joint:

Depending on the size of the valve, this component is either graphite or a trim sealing mechanics. Its only function is to prevent leakage from outside between the body and the mouthpiece.


Stem (Tree): This component transfers the axial force from the actuator to the ball to open and close the Valve. It is also coated with nitrates to withstand wear and tear.


Keys for Assembly Sleeve: These keys transfer a twist from the Assembly Sleeve to the Stem (Tree) valve. They play the role of the sacrificial piece designed to shear if the ball does not fails to rotate to prevent serious damage from occurring.


Topping - Packaging: The soft graphite packaging is overloaded to extend around the Stem (Tree) and prevent leaks outside. The available load is carried out several Belleville pucks. The layout of these washers is essential to reach the correct load, it is described later in this manual.

Bolting: The tightening of the bolts, both on the filling and the main part is essential for the problem-free operation and is described later in this Manual. The proper tightening of the body bolts ensures compression equal to the main part joint and loading the ball into the cup waterproofing. The appropriate and consistent torque values of the bolting the filling provides adequate compression to the filling waterproofing.


Operator:

Depending on the size of the valve, it will be carried out via Hand lever, gearbox to manual control, or a hydraulic actuator. Regular maintenance operators areas are critical to the continued reliability of the system as it is to the valves Themselves. If you have any problems with the operators; Valvtechnologies will contact the respective manufacturers directly to resolve them. Special Designs for Use of The Mud Pipeline

Maintenance and troubleshooting

Installation Control Sheet


1. Remove all transport protections.


2. Check that the valve has not been damaged during transport. If it is to consult the customer for necessary measures. This may include, a claim filing with the forwarder in the event of serious damage to the shipping box/cash/pallet, or damage to the valve, actuator, or accessories.


3. Inspect the valve's welding and remove any debris.


4. Rotate the valve and inspect the surface of the ball containing no Damage. Make sure the ball is perfectly positioned when it is completely open and no edge can be seen. If the ball is not perfectly positioned, an adjustment according to FEO must be made.


5. If the valve is equipped with an actuator, do not lift the valve with a part of the actuator. Lifts must be fastened by straps to the body of the valve. Make sure the center of gravity is positioned safely before the lift is completed, to prevent the valve from slipping straps when lifting. The valve and actuator should not be disassembled unless a person from the manufacturer's qualified service authorizes it. Otherwise, the warranty will be invalid.


6. Before the valve is installed in the pipeline, make sure that the end high pressure is properly positioned according to the requirements of the process. The if you have any doubts, consult the Customer's representative for confirmation of this Position. If necessary, the high-pressure end is shown on the valve by a riveted metal label with a label marked on "EXTRÉMITÉ TO HIGH PRESSURE." Incorrectly installing the valve with the end to high pressure will void the warranty.


7. Insert the bolts of the pipeline bridles carefully so that the

valve coating is not damaged.


8. Squeeze studs or bridle bolts according to information provided by the manufacturer of studs or bolts and use "one star" during the tightening sequence.


9. After the valve is installed, check for any damage to the valve actuator and accessories.


10. If possible, cycle the valve and make sure it runs process is successful. If the valve shows signs of vibration or is not contact the service center for help.


11. During the pressure tests of the pipeline, the valve cannot be used in the closed position to maintain test pressures. If necessary to use the closed valve during testing, then the manufacturer should be contacted for advice.


12. During pressure testing, check for signs of water leakage in the area of the body seal and the sealing pad.


13. If a water leak is detected at the body joint, then the body bolts should be checked, as they may loosen during the due to changes in environmental conditions. Squeeze the bolts using the information on Table 1 in the Manual Installation, Operation, and Maintenance of ValvTechnologies. 


14. If a water leak is perceived in the sealing pad, then the studs should be checked, as they can loosen during transport and due to changes in environmental conditions. Squeeze the bolts using the information on Table 2 in the Installation Manual, ValvTechnologies Operations, and Maintenance. Don't tighten the studs too tightly this can cause the packaging to bind to the Stem (Tree) and may increase the tightening operation. ValvTechnologies recommends that individual studs should be pressed at a U-turn only before the check for leaks. If a leak persists even though the studs are tight as shown in the table, we recommend that the studs be tight no more than an extra lap. If the leak is still visible, then contact the service center for help.


15. If leaks from the valve in the (internal) cup persist, ValvTechnologies recommends that the valve be turned several times to allow internal components to find their corresponding position.

 

 

Troubleshooting: Deformation of the Stem (Tree) or Mounting Hook: The hook that attaches the actuator to the valve body is exposed to stresses extremely high twisting, as does the Stem (Tree). Any distortion in these two components should be reported immediately to the manufacturer, as this may indicate that the ball is mispositioned inside the valve, which can be lead to serious damage to internal components. This deformation can include a twist of the Stem (Tree), weakening or cracking of the hook, a movement of the actuator about the valve, or a deformation in the Stem feather grooves (Tree) where mechanical force is transferred.

External leak to Travers la Juncture:After the valve is in service for a long time, the user can observe an external leak in the rush where the body and the valve tip Meet. Due to the low application pressure, this leak is not likely to cause serious damage but should be addressed as soon as possible. Possible. The first step in eliminating the leak is to ensure that appropriate on the bolting that holds the two components together (described farther away in this manual). If this does not resolve the leak, the next step is to disassemble and replace the body seal.

External escape through the Stem Zone (Tree):

The first step in rectifying is to confirm the correct trim bolts (described later in this manual). The torque applied and the regularity of this value all around the stem (tree) (between 4 and 8 bolts depending on the valve size) determines the load applied to graphite and similarly to its waterproofing capacity. 

Leak to Through the Vanne's Average:

ValvTechnologies spherical rotating valves are designed to reach zero leakage and any leakage through the valve downstream can mean problems serious and must be treated immediately. The most likely causes of waterproofing of the cup are debris trapped in the valve, damage to the ball or cup, and the fact that the valve is not completely closed.