ALABAMA POWER CO FARLEY NUCLEAR PLANT

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Process Valve & Instruments, established in 1986 and based in Leeds, US, is a B2B supplier, wholesaler, distributor, and manufacturer specializing in industrial valves, instruments, and related components. With 201-300 employees, the company serves a wide range of industries across the USA, including Manufacturing (especially OEMs), Pulp & Paper, Oil & Gas, Chemical Processing, and Power Generation. They offer a comprehensive portfolio of products including various types of industrial valves (ball, butterfly, gate, globe, check, control, safety relief, solenoid), pipe and tube fittings, pressure gauges, thermometers, transmitters, industrial hoses, and valve actuators (pneumatic, electric). Process Valve & Instruments also provides OEM services and specializes in custom actuator assemblies, leveraging over 60 years of in-house experience in assembling and testing valve packages. Their product range covers pressure ratings from vacuum to 30,000 PSI and sizes from 1/8" to 24" (fabricated up to 120"), with materials including Stainless Steel, Brass, Carbon Steel, Hastelloy, and Monel. The company focuses on helping customers maximize uptime, increase output, decrease operating costs, and improve safety through quality products and timely deliveries.

Process Valve & Instruments

Pinch valves create a pinch in the passage with the help of air pressure to obstruct the flow. They are mostly used for corrosive and abrasive fluids and can finely separate the flow from the internal parts of the valve. However, there are some drawbacks. As pressure differential is used to move the elastomeric sleeves of the valve, they can get faulty relatively soon. Besides, they do not function well in high temperatures.

Pinch Valves

Gate valves, also called sluice valves, look exactly like a gate, hence the name. Actually, to open or close the passageway, a handwheel moves the gate or wedge-like disk up and down. Most gate valves are multi-turn valves. Gate valves have narrow bodies and have specific applications in which they excel.

Gate Valves

Check valves are used to allow the flow in only one direction and prevent backward flow. That is why they are also called non-return valves. A check valve consists of two separate openings; one for allowing the fluid to enter, and the other for allowing it to leave.
Based on their structure and application, they come in different types, including swing check valves, piston check valves, ball check valves, and tilting disc check valves.

Check Valves

As the overall shape of the valve is spherical, they are called globe valves. They are used to regulate and control the flow with a moveable disc or plug. The disc/plug is connected to a stem and when it comes down, it blocks the passage. Since they are multi-turn valves, they do not fully open or close quickly. They can be automated. Many globe valves are used as control valves.

Globe Valves

Diaphragm valves, also known as membrane valves, have a relatively simple design that can be both manual or actuated. The elastomeric diaphragm controls the flow rate by flexing up or down. They reduce leakage and make a tight shut-off. Another advantage is that they are the best option for fluids with particles.

Diaphragm Valves

Plug valves, which are a type of flow control valve, include a hollow cylindrical or conical passage that allows or prevents the flow. A manual quarter-turn causes the way to open for the fluid. As a result, the flow can be increased or decreased by the user with the help of a handle. But the friction caused by the plug’s rotation can wear it out, especially in higher temperatures.

Plug Valves

Needle valves or plunger valves are one of the best when it comes to precise and smooth regulation of flow. You can also control the pressure of the flow with them. There is a needle-like plunger in the structure of this type of valve which is great for making a tight seal and controlling the fluid with precision.

Needle Valves

A butterfly valve consists of a rotating disc that is used to stop or regulate the fluid. The rotating disc looks a bit like butterfly wings, that is why we call them butterfly valves. They are also quick-acting, simple, light, and easy to be installed in a pipe. Their size ranges from 2 inches to over 12 feet in diameter. They also work great in combination with electric and pneumatic actuators.

Butterfly Valves

One of the most widely used valves is the ball valve. They are quick to act and can be easily actuated. They come in different materials and sizes, which makes them even more useful. A ball valve contains a hollow ball (hence the name) that is perforated. The ball can move with the valve handle which makes it possible to direct the flow in either direction or to stop it.

Ball Valves

To increase the accuracy and improve the design and functions of the equipment, the system must be tested. This is called instrumentation calibration. Different instruments are used to test various aspects of the system.
For example, calibration hand pumps are used to test the pressure measurement. These pumps usually work in combination with calibration fittings and nitrogen calibration sources and Instrument manifolds.

Instrumentation Calibration

A Pressure Regulator is a mechanical device designed to regulate system flow pressure in response to upstream or downstream pressure changes. A pressure regulator contains a pressure-reducing device, such as a poppet valve, a kind of sensor, like a diaphragm, and a force element, such as a spring. Instrumentation switches come in different types, for example, valve switches, flow switches, pressure switches, temperature switches, and position indicating switches, among others. As the name suggests, they are installed to indicate or control a condition in the process. A switch is a device for making, breaking, or changing the connections in an electrical circuit. Position switches are used whenever moving parts must be positioned, controlled, or monitored.

Regulators and Switches

When these terms originated there was a distinctive difference between the two. A transmitter was referred to as an instrument with a current signal (i.e. 4 mA to 20 mA) and a transducer was referred to as an instrument with a voltage signal (i.e. 0 Vdc to 10 Vdc). As time has progressed these terms are now commonly interchanged for reference to either output signal.

Process Valve & Instruments

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