3271 Type Pneumatic Diaphragm Actuators

The Type 3271 pneumatic rolling diaphragm actuator, suitable for diverse industrial applications, provides linear motion for valve sizes from micro-flow to large 20"+ globe control valves. Its thrust force varies with factors like actuator area, pneumatic pressure, and spring stiffness. This field-reversible, multi-spring design facilitates fail-safe action alteration, ensuring uniform force application and reducing valve height and weight. With a 360° rotation capability when paired with a positioner, it enables convenient local operation irrespective of valve orientation. The rolling diaphragm enhances precision and diminishes hysteresis, surpassing traditional stretching diaphragms.
Shop Help Me

Key Features

Key features and benefits of 3271 Type Pneumatic Diaphragm Actuators
1

Key Features

The Type 3271 pneumatic rolling diaphragm actuator offers versatility through its field-reversible configuration, enabling the alteration of fail-safe action as needed. Its multi-spring mechanism ensures uniform force distribution, enhancing valve control efficiency.
2

Key Features

When combined with a positioner, this actuator can rotate a full 360°, facilitating effortless local operation regardless of the valve's orientation. This feature enhances operational flexibility and ease of use in various industrial settings.
3

Key Features

Unlike traditional stretching diaphragms, the rolling diaphragm employed in this actuator delivers increased precision and reduced hysteresis, resulting in more accurate and reliable valve control, crucial for industrial applications requiring precise regulation.

Valve Standards & Stuff
Size Range: 120 to 2x2800cm2
Rated Travel: 7.5 to 160 mm
Available Thrust: 0.72 to 151.2 kN
Options: Handwheel, Travel Stop, & Fire Lock
Weight Range (kg): 2.5 to 41
Application Type: Series 240, 250, 280 and 290 Valves as well as Type 3510 Micro-flow Valves
Actuator Area: 120 to 750v2 cm²

FAQs

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.
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.

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.

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.
Correct sizing, clean media, and protection from debris are key to keeping control valves performing well. Staying within pressure and temperature ratings and servicing them regularly will greatly reduce premature failure.

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.

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.

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.

Need More Dimensions?

No time for fancy software or your tekkers are just pretty substandard? We offer a full technical drawing service for our actuated valves. The Artists are ready to draw. Tell us what you need.

3271 Type Datasheets & Certificates

  • Document
Datasheet

3271 Type Pneumatic Diaphragm Actuators
  • Document
DOCUMENT

Mounting & Operating Instructions
  • Document
DOCUMENT

3271 Type Spare Parts List
Request more information or Advice

Please feel free to request information and advice using the form below or call us on 0151 547 1221

3271 Type Pneumatic Diaphragm Actuators