Executing Agency
An actuator is a mechanical device used to control valves, dampers, etc.
　　pneumatic actuator
Pneumatic actuators can provide high stem power output under harsh working conditions. These actuators are typically operated by air pressure, but some can be operated by process liquids themselves.
　　Diaphragm actuator
The action mode of Fisher springs and diaphragm pneumatic actuators can be "positive action", that is, the air entering the diaphragm cover causes the actuator push rod to move downward. This' gas shut-off 'action compresses the spring, which in turn pushes the actuator push rod upwards again when the gas source pressure drops or disappears.
In addition, the action mode of spring and diaphragm pneumatic actuators can be "reaction", that is, the air entering the diaphragm cover causes the actuator push rod to move upward. This "air opening" action compresses the spring, which in turn causes the actuator push rod to move downward when the air source pressure drops. This is the most common type of diaphragm actuator, as the spring will cause the valve to be in the "fault automatic closing" position when the air source disappears.
　Fisher 2052
Fisher 2052 spring diaphragm rotary actuator can be used on rotary shaft valve bodies and is suitable for throttling or switching applications. 2052 can be used for throttling applications with locators or for switch conditions without locators. 2052 has an ISO 5211 assembly interface and can be installed on non Fisher valves.
　　Characteristics and advantages
The compact design and small size of the valve/actuator packaging increase the versatility of installation, making it suitable for small pry and process factories with limited space.
The new actuator is compatible with DVC2000, DVC6000 controllers, and 3620 locators, and can receive feedback from the connecting rod to the end mounted DVC2000 without connecting rod through a non-contact magnet array. DVC6000 and 3620 are side mounted and feedback is provided through a cam and feedback arm.
Clamping type connecting rod used to reduce idle - clamp the connecting rod onto the spline valve shaft and connect it to a single pivot linkage mechanism to reduce idle between the actuator and the valve. The typical cumulative dead zone of Fisher rotary valve components results in a variation range of 0.5% or less.
No need for spring setting range - The new nested spring design does not require a spring setting range. This also simplifies the process of selecting the executing agency.
Optional plugins for ISO 5211 installation - the actuator can now be directly installed onto non spline shafts (such as square and double D-type). In this way, the actuator can be installed on more valves that comply with ISO 5211, enhancing control force.
Standard adjustable travel limiter and optional locking function - allowing adjustment or modification of travel range without removing the actuator or adding additional components. The optional locking function locks the connecting rod in the spring failure position.
The fail safe mechanism does not contain aluminum - all components (steel, cast iron, and ductile iron) in the fail safe mechanism can ensure the safety integrity of the actuator in the event of a fire.
Standard powder coating - Emerson Process Management TM powder coating surfaces provide excellent corrosion protection for all external steel and cast iron components.
NAMUR VDE/VDI 3845 is used for accessory installation - complying with global standards ensures compatibility with most accessories, enabling fast and easy installation.
On site reversible left or right installation - the action mode of the actuator/valve component can be switched from push down open type to push down close type without the need for additional components, and vice versa.
Detached and top mounted handwheels - available (except for size 3 actuators that cannot be installed on the top).
　Regarding the Fisher brand
Emerson Fisher valves provide time tested innovative solutions that can help customers reduce equipment maintenance costs, lower capital requirements, reduce compliance costs, and improve process availability.
This will be achieved through world-class products, including Fisher positioners, Fisher regulators, Fisher control valves, Fisher valves, Fisher regulators, Fisher pressure reducing valves, Fisher control valves, Fisher instruments, and performance services, all of which are the most reliable products in the process control industry.
　Fisher Company Introduction
Fischer Control Equipment International Limited was founded in 1880. At that time, in Marshalltown, Iowa, USA, our founder William Fisher invented the first pump regulator and planted Fisher's seeds in the small town. Since then, Fisher has achieved tremendous development through years of hard work and has become a recognized brand.
Emerson purchased Fischer in 1992 and merged with another world leader in the process instrumentation field, Rosemount, to establish Fischer Rosemount to better meet our customers' requirements for a complete range of applications and process control. In April 2001, Fischer Rosemount was renamed Emerson Process Management.
　　Fischer's business scope
The industries served include: petroleum and gas, paper and pulp, oil refining, food and beverage, chemical and petrochemical, pharmaceuticals, electricity, metals and smelting, semiconductors; The product and service scope includes: control valves and actuators, digital valve controllers, digital level controllers, AMS ValveLink software, field installed instruments, quick replacement parts services, regulators, etc.