JS ACTUATORS
THE ACTUATOR SPECIALIST
JS Launch Neptronic Actuators to UK
Failsafe and non-failsafe models are available. The failsafe units incorporate the patented Enerdrive system.
The actuator range consists of digital and analogue rotary and linear actuators for dampers, multi-signal actuators, high torque actuators and fast actuators for precise control applications such as fume hood cupboards.
Complete actuated valves are also available from JS Actuators, including two and three-way actuated ball valves, globe valves and butterfly valves to control the flow of hot water, chilled water and steam in commercial and industrial applications.
The Enerdrive Failsafe System
Our range of failsafe actuators incorporate super capacitors to provide a means of making the unit move to a customer selected position in the event of a power failure. Having the actuator return to a specific position is required by industries using these types of products on air dampers, as well as chilled and hot water valves.
The reasoning behind this requirement is that if power fails, the device should go to the selected "safe" position to prevent harm or damage to equipment, products, livestock and people due to environmental factors.
In cold weather environments, problems such as air-conditioner coil freeze-up can occur if the outside air damper does not close.
In water lines, the flow valve should move to the fully open position during a power failure. This allows water to flow in the pipes and helps prevent rupture of the pipes in cold weather climates due to the water freezing.
The reasoning behind this requirement is that if power fails, the device should go to the selected "safe" position to prevent harm or damage to equipment, products, livestock and people due to environmental factors.
In cold weather environments, problems such as air-conditioner coil freeze-up can occur if the outside air damper does not close.
In water lines, the flow valve should move to the fully open position during a power failure. This allows water to flow in the pipes and helps prevent rupture of the pipes in cold weather climates due to the water freezing.
Some environments must be continually cooled because of internal heat generation. In these environments there may be a requirement that the outside air dampers return to the fully open position to reduce the heat build-up inside the area being cooled.
Examples of these types of environments include factories and office buildings during periods of warm or hot weather.
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Examples of these types of environments include factories and office buildings during periods of warm or hot weather.
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The Super Capacitor Advantage
During an actuator’s duty cycle, a motor is used to drive a damper or a valve to a desired position. All our competitors' failsafe actuators use mechnical springs to return the damper or valve to the "safe" position in case of a power failure.
As well as driving the damper or valve to the desired position, the actuator's motor must also wind up the spring to create the return force needed in case of power failure. This takes energy. The motor must overcome both the force required to drive the damper or valve as well as the force exerted by the spring. By using super capacitors and eliminating springs, the additional power requirement to wind the spring is eliminated.
This increases unit efficiency and uses less power. Alternatively, it allows a smaller motor to be used or to use the same motor and have a significantly higher drive safety factor and motor life expectancy.
This causes the springs to either fatigue or break after "X" cycles or to lose power by taking a "set". Springs can be designed to have a significantly lower stress and a longer life cycle but cost factors must be considered very closely.
As well as driving the damper or valve to the desired position, the actuator's motor must also wind up the spring to create the return force needed in case of power failure. This takes energy. The motor must overcome both the force required to drive the damper or valve as well as the force exerted by the spring. By using super capacitors and eliminating springs, the additional power requirement to wind the spring is eliminated.
This increases unit efficiency and uses less power. Alternatively, it allows a smaller motor to be used or to use the same motor and have a significantly higher drive safety factor and motor life expectancy.
This causes the springs to either fatigue or break after "X" cycles or to lose power by taking a "set". Springs can be designed to have a significantly lower stress and a longer life cycle but cost factors must be considered very closely.
Another example where heat built-up can be excessive is in controlled environment animal pens such as found in the egg production areas on modern poultry farms and in the indoor pen areas on modern pig farms. Enough heat is generated by the relatively tightly packed animals themselves and the farm equipment in the area to raise the temperature enough to harm or kill many of the animals.
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Features
To save money, designers try to make the time factor or cycle factor beyond the estimated life of a unit. Sometimes they are not successful and a unit fails to operate properly.
Another advantage of using the super capacitors instead of springs is overall unit life. Springs used to return a damper or valve to a "safe" position are relatively highly loaded and have a high internal stress.