Choke valves are designed to resist harsh conditions such as extreme corrosion, deterioration, high fluid flow, marine environmental conditions, and so on. It is capable of withstanding pressure decreases of up to 500 bar. API codes (API 6A/6D) are typically used to manufacture choke valves.
Where can you make use of choke valves?
Choke valves are commonly used for the following purposes:
- Heads of production wells
- In land and subsea manifolds used in various chemical plants to handle oil, gas, water, and sand mixtures.
- Working with steam and CO2 in various petrochemical processes
- For oil and gas drilling mud and hydraulic fracturing applications.
- Petroleum and natural gas reserves
- Flow lines that necessitate extremely high operating pressures
- Cementing and acidizing lines
- gas and oil production platforms
- FPSO loading vessels
What are the primary purpose of using a choke valve?
A choke valve is primarily used for purposes like adjusting the rate of flow by controlling the choke cross-section, load resistance, and pressure buffering by blocking fluid flow to some extent.
What are the working principles of a choke valve?
The basic use of a choke valve is to cut off the flow through the valve to achieve the desired rate of flow. This is accomplished by narrowing the fluid flow through the valve body. The flow rate of adjustable choke valves is controlled by changing the stem and seat arrangement. The hand wheel can be rotated to adjust the orifice size and flow velocity, resulting in the appropriate flow rate. A choke bean is used to achieve a set flow rate in the form of positive choke valves.
What influences the choosing of choke valves?
Choke valves are carefully chosen depending on uses and other parameters such as diameter, materials, trim design, and so on. The following factors guide the selection of choke valves:
- The velocity of the inlet and outlet
- Index of Cavitation
- Pressure drop limitation
- High level of pressure
- Flow rate requirement
- Process operating circumstances
- Start-up parameters
- Size and timing of connecting pipework
- Physical properties of fluid handling
What are the benefits of choke valves?
Because of their durability and proper handling of very high working pressures, choke valves are commonly utilized in the gas and oil industries. The following are the primary benefits of choke valves:
- Long service life
- High rangeability
- Regulated erosion
- Minimal vibration
- Pressure equalization
- Precise flow rate control
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