GNV12-20 Throttle Valve: How to precisely adjust its orifice size?

1、 Understand the basic structure and working principle of throttle valves
The GNV12-20 Throttle Valve is a precision fluid control device designed to precisely control fluid flow by adjusting the size of the throttle orifice. Firstly, we need to have a deep understanding of its basic structure. This throttle valve usually consists of key components such as valve body, throttle hole, regulator, and seal. The valve body, as the main structure, is responsible for accommodating fluids and supporting other components; The orifice is the core of controlling the flow rate, and its size directly determines the amount of fluid passing through; The regulator is a user operated interface that adjusts the opening of the throttle hole by rotating or moving; Seals ensure that the fluid does not leak and maintain the stable operation of the system.
In terms of working principle, when the fluid passes through the throttle valve, it will be obstructed by the throttle hole, thereby slowing down the flow rate and reducing the pressure. The function of a regulator is to change the opening of the throttle hole, thereby adjusting the flow rate of the fluid. Turning the regulator counterclockwise will gradually enlarge the orifice, increase the fluid flow rate, and speed up the flow; On the contrary, clockwise rotation will reduce the opening of the orifice, decrease the fluid flow rate, and slow down the flow velocity. Therefore, understanding the basic structure and working principle of throttle valves is the foundation for accurately adjusting the size of throttle holes.

2、 Prepare tools and materials
Before adjusting the GNV12-20 Throttle Valve orifice, we need to prepare some necessary tools and materials. Firstly, we need a specialized adjustment tool, which is usually a wrench or screwdriver paired with the throttle valve. The design of these tools conforms to the shape and size of the throttle valve regulator, ensuring that no damage is caused to the throttle valve during the adjustment process.
We need to prepare some cleaning cloths or tissues. During use, the throttle valve may accumulate some impurities or dirt, which can affect the adjustment accuracy of the throttle hole. Therefore, before adjusting, we need to clean the throttle valve and its surrounding environment with a cleaning cloth or tissue to ensure that there are no impurities affecting the adjustment effect.
If the adjustment process of the throttle valve requires lubrication, we also need to prepare appropriate lubricants. Lubricants can reduce friction between regulators and throttle holes, making the adjustment process smoother. However, it should be noted that not all throttle valves require lubrication, so before choosing a lubricant, we need to first understand the material and lubrication requirements of the throttle valve.

3、 Adjustment steps
The steps to adjust the size of the GNV12-20 Throttle Valve orifice need to be meticulous and careful. Firstly, we need to close the inlet valve to ensure that there is no fluid flowing into the inlet of the throttle valve. This is because during the process of adjusting the throttle orifice, if fluid suddenly flows in, it may cause pressure fluctuations or damage to the throttle valve.
We need to use a cleaning cloth or tissue to clean the throttle valve and its surrounding environment. This step is very important because the throttle valve may accumulate some impurities or dirt during use, which can affect the adjustment accuracy of the throttle hole. When cleaning, we need to ensure that all components of the throttle valve are clean and free of impurities to avoid affecting the subsequent adjustment process.
We need to find the regulator on the throttle valve. A regulator is usually a knob or handle on a throttle valve, used to control the opening of the throttle hole. After finding the regulator, we need to rotate it counterclockwise to gradually expand the flow hole. During the rotation process, we need to gradually and slowly adjust to avoid sudden pressure changes caused by sudden adjustments. At the same time, we also need to closely observe the flow and pressure changes before and after the throttle valve to ensure that the regulation achieves the expected effect.
During the adjustment process, we may need to make multiple micro adjustments to the size of the flow holes. This is because the adjustment accuracy of the throttle valve is very high, and even small changes can have a significant impact on flow and pressure. Therefore, we need to gradually adjust the size of the flow holes according to actual needs until the desired flow rate and pressure values are achieved.

4、 Precautions
When adjusting the GNV12-20 Throttle Valve orifice size, we need to pay attention to the following points:
Safe operation: Throttle valves are commonly used in high-pressure and high-temperature fluid control systems, so when adjusting the orifice size, we need to ensure the personal safety of operators. During the operation, we need to wear appropriate protective equipment such as goggles, gloves, etc. At the same time, we also need to ensure the safety of the environment around the throttle valve and avoid dangerous accidents such as fires and explosions.
Gradual adjustment: The adjustment accuracy of the throttle valve is very high, so we need to avoid adjusting too much at once. If the adjustment is too fast or too aggressive, it may cause system fluctuations or damage to the throttle valve. Therefore, in the process of regulation, we need to gradually and slowly observe the changes in flow rate and pressure closely.
Regular maintenance: Throttle valves may be affected by various factors during use, such as fluid corrosion, wear, etc. Therefore, we need to regularly maintain and upkeep the throttle valve. This includes checking the wear of the throttle hole, replacing damaged seals, cleaning accumulated impurities, etc. Through regular maintenance, we can ensure the long-term stable operation of the throttle valve.
Reference product manual: For users who are not familiar with throttle valve regulation, it is very important to refer to the product manual. The product manual usually includes detailed information about the structure, working principle, and adjustment method of the throttle valve. By carefully reading the product manual, we can better understand the performance characteristics and usage requirements of the throttle valve, and thus adjust the size of the throttle hole more accurately. At the same time, if there are any problems or questions encountered during use, we can also consult the product manual or professional technical personnel at any time.