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Meta Description: Ensure proper control valve operation with our step-by-step FAT guide covering ANSI/ISA 75.25, ISO 5208, and API 6D compliant testing procedures for valve positioning & pneumatic actuator alignment.

Many kinds of valves are used in the industrial process, and to ensure proper functionality, compatibility, and safety for end-users, EPC, or engineering, every country has particular organizations to make standards.

Managing fluid flow in different industrial applications requires the use of multiple valves which start, stop or redirect the flow of fluids. Most of these valves are two-way, meaning they have an inlet and outlet port.However, some flow applications require a third port, providing two inlet ports and a single outlet or two outlets and one inlet port. This implies that these valves can perform the same functions as two-way valves and exhibit better performance characteristics.

In modern process industries—from chemical plants to oil and gas facilities—control valves play a crucial role as the “final control element” in regulating the flow, pressure, temperature, and level of fluids. Their selection, operation, and integration into process control systems can dramatically affect efficiency, safety, and product quality.

Determine what the valve is supposed to do.Is this valve used for tight control or is”loose”control acceptable. (For instance, are you trying to control a flow within a very tight margin across a broad range of process conditions or are you simply throttling a charge flow down as it approaches setpoint to avoid overshoot). The requirements for one situation are quite different from the other.