Open at No Power Valve Actuators
Description
Open at No Power Valve Actuators are designed to automatically open a valve when there is a loss of power. This feature ensures that the valve defaults to an open position, allowing fluid or gas to pass through without obstruction in the absence of an external power source.
Working Principle
These actuators typically operate using a spring-return mechanism. When power is supplied, the actuator holds the valve in a closed position against the spring force. Upon power loss, the spring force overcomes the actuator's holding force, causing the valve to open. This fail-safe design is particularly useful in applications where maintaining flow is critical during power outages.
Applications
Open at No Power Valve Actuators are commonly used in safety and emergency systems where maintaining fluid flow is essential. For example, they are employed in fire suppression systems to ensure water flow in the event of a power failure. They are also used in cooling systems to prevent overheating by allowing coolant to circulate freely when power is lost.
Advantages over other Valve Actuators
One significant advantage of Open at No Power Valve Actuators is their fail-safe operation, which ensures that the valve opens automatically during power outages. This feature is particularly beneficial in safety-critical applications where maintaining flow is crucial. Additionally, these actuators do not require external power to open the valve, reducing dependency on backup power systems.
Limitations
A limitation of these actuators is that they may not be suitable for applications where the valve must remain closed during a power outage. Additionally, the reliance on spring mechanisms can limit the size and force of the actuator, potentially restricting their use in high-pressure systems.
Considerations
When selecting Open at No Power Valve Actuators, consider the initial cost, which may be higher due to the specialized fail-safe design. Operating expenses are generally low since they do not require power to maintain the open position during outages. Durability and maintenance costs should also be considered, as the spring mechanism may require periodic inspection and replacement to ensure reliable operation. Accuracy in maintaining the valve position during normal operation is another factor to evaluate, especially in systems requiring precise flow control.
from Indelac Controls, Inc.
Enclosure options include: NEMA 4, 4X, 7 and 9. The heavy-duty sand-cast aluminum enclosure has a thermally bonded ultraviolet resistant polyester powder coating that not only enhances its appearance but also is a tough corrosion resistant coating. Anodizing and epoxy coatings are offered as well. [See More]
- Failsafe: CloseNoPower; CloseNoControl (optional feature); OpenNoPower; OpenNoControl (optional feature)
- Valve Motion: Rotary
- Actuation Method: Electric
- Operation: OnOff; Modulating (optional feature)
from Indelac Controls, Inc.
Enclosure options include: NEMA 4, 4X, 7 and 9. The heavy-duty sand-cast aluminum enclosure has a thermally bonded ultraviolet resistant polyester powder coating that not only enhances its appearance but also is a tough corrosion resistant coating. Anodizing and epoxy coatings are offered as well. [See More]
- Failsafe: CloseNoPower; CloseNoControl (optional feature); OpenNoPower; OpenNoControl (optional feature)
- Valve Motion: Rotary
- Actuation Method: Electric
- Operation: OnOff; Modulating (optional feature)
from Indelac Controls, Inc.
Enclosure options include: NEMA 4, 4X, 7 and 9. The heavy-duty sand-cast aluminum enclosure has a thermally bonded ultraviolet resistant polyester powder coating that not only enhances its appearance but also is a tough corrosion resistant coating. Anodizing and epoxy coatings are offered as well. [See More]
- Failsafe: CloseNoPower; CloseNoControl (optional feature); OpenNoPower; OpenNoControl (optional feature)
- Valve Motion: Rotary
- Actuation Method: Electric
- Operation: OnOff; Modulating (optional feature)
from Indelac Controls, Inc.
Model ES@ is a light duty actuator designed for fail-safe applications. For best life expectancy it is recommended that model ES2 be powered in both clockwise (CW) and counter clockwise (CCW) directions. If used in this manner one can expect over 2,000 open/close cycles. When allowed to spring to... [See More]
- Failsafe: CloseNoPower; OpenNoPower
- Valve Motion: Rotary
- Actuation Method: Electric
- Operation: OnOff
from Indelac Controls, Inc.
Indelac Controls is proud to introduce models ASC4, ASC6, & ASC10. These heavy duty spring return actuators utilize an electro-mechanical clutch in order to achieve modulating control as well as DC voltage options for our already popular spring return electric actuators. ICI ’s new ASC... [See More]
- Failsafe: CloseNoPower; CloseNoControl (optional feature); OpenNoPower; OpenNoControl (optional feature)
- Valve Motion: Rotary
- Actuation Method: Electric
- Operation: OnOff; Modulating (optional feature)
from MAXPRO Technologies, Inc.
MAXIMATOR air operated valve actuators are piston type design, and are mounted on a manual valve to provide remote control capability. There are two styles of air actuators available, and selection is based on the valve size, system pressure, and air pressure available. Valve Actuator features:... [See More]
- Failsafe: OpenNoPower
- Valve Motion: Rotary
- Actuation Method: Pneumatic
- Operation: OnOff
from GF Piping Systems
The EA11 is our basic version for the open/close operation of smaller torques. The electric actuator EA11 consists of a gear, a direct current motor, a base print as well as equipment for end stops in its standard version. The Electric Actuators EA21, EA31, EA42 are not only excellently equipped but... [See More]
- Failsafe: CloseNoPower; OpenNoPower
- Valve Motion: Rotary
- Actuation Method: Electric
- Operation: OnOff
from GF Piping Systems
All GF Piping Systems actuators can be used as open/close or control actuators. The double-acting design means that the valve is opened or closed by the actuator applying compressed air. Depending on the requirement, the springs can open or close. The single-acting actuators only apply compressed... [See More]
- Failsafe: CloseNoPower; OpenNoPower
- Valve Motion: Rotary
- Actuation Method: Pneumatic
- Operation: OnOff