8a Type PTFE Lined Angle Control Valves

The Pfeiffer 8a PFA lined angle control valve, suitable for applications within the ANSI 150 pressure class, is designed for handling extremely corrosive media in chemical processes. It can be fitted with a range of actuators from the SAMSON group, including pneumatic, electric, hydraulic, or electro-hydraulic types. This valve features a modular design, an exchangeable PTFE seat and plug, a PTFE bellow stem seal with secondary safety packing, and a test connection for seal monitoring.
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Key Features

Key features and benefits of 8a Type PTFE Lined Angle Control Valves
1

Key Features

Enables easy assembly with a variety of actuators provided by the SAMSON group, such as pneumatic, electric, hydraulic, or electro-hydraulic types, enhancing its adaptability to different control environments.
2

Key Features

Offers a cost-effective solution for handling aggressive or corrosive media, with the added advantage of easy maintenance and high durability.
3

Key Features

Ensures a high level of sealing integrity against leakage, complemented by a test connection for the primary seal's monitoring, thereby enhancing operational safety and reliability.

Valve Standards & Stuff
Maximum Pressure Rating: 150
Temperature Range: 14 to 302°F (-10 to 150*C)
Size Range: 1/2" to 2"
End Connection: Flanged
Application Type: Corrosive Media
Body Material: PTFE Lined Cast Iron

FAQs

What is a control valve and how does it work?
A control valve regulates the flow of fluid by varying the size of the flow passage as directed by a signal from a controller. This adjustment impacts the rate of flow as well as the process quantities such as pressure, temperature, and fluid level.
What are the main types of control valves?
The main types of control valves include globe control valves, which offer precise flow control; rotary control valves, known for their versatility and efficiency; and specialty control valves, designed for specific, often challenging applications.
How do I choose the right type of control valve for my application?
The choice depends on several factors including the nature of the material to be controlled (liquid, gas, or steam), the required flow rate, the pressure drop across the valve, and the specific control characteristics needed. Consulting with a valve specialist is often recommended.
What are globe control valves and their advantages?
Globe control valves are characterized by a linear motion to throttle flow. They are highly effective for precise control in low to moderate flow rates and are favored for their ability to handle a wide range of operating temperatures and pressures.
Can rotary control valves be used for slurry applications?
Yes, certain rotary control valves are designed to handle slurry applications. Their design minimizes cavitation and erosion, making them suitable for liquids with suspended solids. However, the specific choice of valve depends on the slurry's characteristics.
What makes specialty control valves different?
Specialty control valves are engineered to address unique or challenging conditions not met by standard globe or rotary valves. This includes extreme pressures or temperatures, handling hazardous materials, or precise control demands.
How can I ensure the longevity of my control valves?

To ensure longevity, regularly inspect and maintain your control valves, keeping seals and internals clean and lubricated. Use materials compatible with your media and always operate within pressure and temperature limits. Adding smart positioners or monitoring tools can help detect issues early and reduce wear.

What role does material selection play in control valve performance?
Material selection is critical for ensuring compatibility with the fluid, resistance to corrosion or erosion, and suitability for the operating temperature and pressure. Incorrect material selection can lead to premature valve failure and operational issues.

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8a Type PTFE Lined Angle Control Valves