Actuator services On GlobalSpec

Chapter 5: Manual Operators and Actuators: Section 5.3.2 - Pneumatic Actuator Design

5.3.2 Pneumatic Actuator Design The most commonly applied pneumatic actuator over the past 40 years has been the diaphragm actuator (Fig. 5.8). Most diaphragm actuators are designed for linear motion,... (Read More)

Chapter 5: Manual Operators and Actuators: Section 5.4 - Nonpneumatic Actuators

5.4.1 Electric Actuators Electric motors installed on process valves were one of the first types of actuators used in the process industry. Such electric actuators have been used since the 1920s,... (Read More)

Chapter 5: Manual Operators and Actuators: Section 5.3 - Pneumatic Actuators

Pneumatic Actuators 5.3.1. Introduction to Pneumatic Actuators The most commonly applied actuator is the pneumatically driven actuator, because the power source—compressed air—is... (Read More)

Chapter 5: Manual Operators and Actuators: Section 5.3.2 - Diaphragm Actuators

The chief advantage of diaphragm actuators is that they are relatively inexpensive to produce and are commonly seen through the entire process industry. Although limited in high-thrust requirements,... (Read More)

Chapter 5: Manual Operators and Actuators: Section 5.8.2 - Air Springs Using Cylinder Volume

5.8.2 Air Springs Using Cylinder Volume For applications where the service conditions are moderate in nature, yet the failure spring cannot overcome the process, an air spring can be applied, using... (Read More)

Chapter 4: Control Valves: Section 4.2.4 - Globe-Control-Valve Trim Variations

With special service requirements, globe control valves can use a number of specialized trims for unique flow requirements. Some applications require extremely low flow coefficients, with Cvs... (Read More)

Chapter 10.22 - Control Valve Features: Fire Safe Treatment

Fire Safe Treatment The concern for valve and actuator performance during a fire has brought about many interesting valve designs. The interest for fire safe valves is highest in petroleum and... (Read More)

Chapter 4: Control Valves: Section 4.2.3 - Globe-Control-Valve Operation

The most common globe valve uses a T-style body, which allows the valve to be installed in a straight pipe with the top-works or actuator perpendicular to the line and will be used to explain the... (Read More)

Pneumatic and Electric Actuator Product Guide - Imperial

For applications involving extreme temperature ranges or corrosive chemicals, to periodic opening or closing of a valve or hundreds of cycles 24 hours a day, pneumatic actuators are required to... (Read More)

Chapter 5: Manual Operators and Actuators: Section 5.9.10-5.9.12 - Control Valves & Transducers

5.9.10 Speed Control Valves Speed control valves are used to limit the stroking speed of an actuator by restricting the amount of air flow to or from the actuator. These small valves can be mounted... (Read More)

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