Posts Tagged ‘direct coupled actuators’
Belimo is offering a really cool new linkage the Belimo ZG- JSL Belimo has created the quickest install designed with ease in mind. The ZG-JSL linkage is designed to facilitate the attachment of select Belimo actuators to a damper’s jackshaft. The unique open ended design allows the linkage to clamp on to any part of a jackshaft measuring from 1/2″ to 1.05″ in diameter.Saves time and cost
The Belimo ZG-JSL linkage simplifies typical installations and eliminates the difficulties where jackshaft bearings are hard to access. By improving the method of installing actuators onto jackshafts, the installer saves on installation time translating into a cost savings. The quicker the install, the sooner the installer can move on to the next project. Now with the Belimo ZG-JSL linkage all jackshaft installations will only take minutes!Ideal for tight spaces Read More
BELIMO USA provides great products and as a Platinum Belimo stocking distributor STROMQUIST & COMPANY loves the solutions Belimo products allow us to bring to our customers. Our customers love the great Belimo damper and Belimo valve actuators, and cool money saving products like the Belimo piping packages. One of the really innovative Belimo products that can save major installation dollars and provide on going energy savings long after the installation is the Belimo PICCV ( Pressure Independent Characterized Control Valve).
Now that might sound like a mouth full, but what the Belimo PICCV valve is a Belimo differential pressure regulator in series with a Belimo characterized control valve. The regulator in the Belimo PICCV valve controls the amount of flow that passes through the Belimo control valve by the diaphragm that moves according to changes in pressure over the Belimo control valve. Thus the flow remains constant no matter what happens with pressure changes.The pressure regulator absorbs all pressure changes so the differential pressure is held constant over the Belimo control valve thus delivering consistent predicable flow. Read More
Stromquist & Company is pleased to announce a new actuator from Belimo USA. Belimo created the new AFBUP Series Actuator to offer Quality, Reliability and Technical Superiority. One of the really impressive things about Belimo is the quality testing they do with their products. Although the Belimo actuator shown in this video is not a Belimo AFBUP you get the idea
One of the big features Belimo put into this new Belimo actuator is more power supply voltages. The range goes from 24 to 240 vac or you can have 24 to 125 vdc, so installation costs should be lowered and you don’t have to worry about having the right transformer, nice thinking Belimo ! Read More
Stromquist & Company is proud to be a platinum distributor for Belimo USA Actuators and Belimo USA Valves. We keep a very large inventory of Belimo Products in both our Atlanta and Flordia warehouses. This means that we can ship Belimo products until 5:45 EST.
Belimo USA specializes in actuators. They where the first company to succeed in marketing the direct coupled actuator that has revolutionized the HVAC actuator business saving customers major dollars over foot mounted actuators.
Whether you are using Belimo valve actuators, Belimo damper actuators, Belimo PICCV valves, or Belimo accessories our customers have found the quality and ease of use of the Belimo products to be outstanding. One of the really cool accessory items is the Belimo piping package. This kit which Belimo introduced in 2009 .
includes all the hoses and gear you needto pipe a Belimo or anyones actuator to a coil, thus saving time and money on valve installations Read More
Yes, there is an answer! The never ending questions from clients about boiler energy savings, maximizing burner efficiency, reducing emissions and reduced excess air, increased equipment life, increased system reliability, flexibility and increased safety can now be answered.
With ever increasing popularity the Honeywell “Controlinks” fuel air ratio commercial/industrial combustion controls are sweeping the market.
To look at the future we need to understand how boiler efficiency was dealt with in the past. When a boiler is first commissioned at a new site the combustion efficiency is set by the installer using a combustion analyzer and adjusting the single modulating motor with jackshafts and their linkages to the fuel valve and air damper to achieve the best combustion efficiency. This “setup” during startup fixes the air-to-fuel ratio over the firing range of the boiler. Over time environmental and physical changes will reduce this “optimum” setup. Changes in temperature, pressure, and humidity, along with physical wear on the linkages and jackshafts, will alter the fixed air-to-fuel ratio causing increased operating and maintenance costs. The weakest “link” in this system is the linkage so let’s go “LINKAGELESS.”
The basic Honeywell Controlinks system consists of an R7999 Controlinks Controller, Q7999 Universal Subbase, ZM7999 Commissioning Software, and the ML7999 Universal Parallel Positioning Actuator (UPPA).
How the Controlinks system works… Four separate UPPAs (ML7999) replace the single actuator used with mechanical cam and linkage systems, providing independent control of the combustion air damper, the primary fuel, the secondary fuel, and the Flue Gas Recirculation (FGR) damper if used. The UPPAs (ML7999) are controlled by the Controlinks Controller (R7999), which responds to the load, and firing rate demands setup by the installer using a combustion efficiency analyzer throughout the boiler run/load cycle.
R7999 Controlinks Controller
ML7999 Controlinks Actuator
My next post will be on commissioning the Controlinks system, followed by a discussion on Controlinks features.
Let Stromquist and Company help you with your Honeywell Controlinks needs by calling us at 1-800-241-9471 or contacting one of our many CGNA members.
First, to understand these types of control you must have the elements of control. The elements of control are the sensor (senses the medium being controlled), the controller (device either preset or programmed to react to the sensor), and the final controlled device such as a damper or a control valve (receives input signals from controller to affect change in controlled medium). These elements are considered the control loop.
On/Off control is the basic type of control in a control loop. With On/Off control, the sensor senses the controlled medium and sends a signal back to the controller, which processes the signal. For ease of understanding, our example will be a heating application. The set point (the desired control point) in this case is 68 degrees with a temperature differential of 2 degrees for the controller. When the sensor’s signal to the controller reports a temperature of less than the controller’s set point, the controller sends a signal to the final control device (hot water valve) to position to fully open until set point is achieved. When the controller receives a signal from the sensor that the set point has been achieved, the controller then sends a signal to the valve to position to fully closed. The problem with On/Off control is over-shoot temperature of the desired system set point because of reaction time between sensor, controller, and final control device. Review: With On/Off, the controller asks “Is there an error?” The controller compares the actual value of the controlled medium to the set point through the sensor. As the controlled medium deviates from set point, the controller’s output cycles the final controlled device on, and when the set point is reached the controller’s output cycles the final control device off.
Floating control is a variation of On/Off control that requires a fast responding sensor and a slow-moving actuator connected to the final controlled device (valve or damper). Using the same example as the On/Off example above, when the sensed temperature drops below the set point of 68 degrees by the controlled medium’s sensor, the controller sends a signal to activate the actuator on the final control device. The actuator starts to slowly drive open the hot water valve, increasing the heat in the controlled medium. When set point is reached the actuator stops opening the final control device (hot water valve) and tries to hold at set point. If set point starts to be over-shot, the controller sends a signal to the actuator to start to drive close the valve. Review: Set point control is achieved when the sensor signal (from the controlled medium) starts to deviate from the controller set point. The controller sends a signal to the actuator of the final control device (valve or damper) to slowly drive open. As the set point is approached the controller sends a signal to the actuator, then the actuator stops and tries to maintain set point. If set point is passed the controller sends signal to the actuator to drive the final control device to a closed position.
Modulating/Proportional represents the higher end of control positioning. In modulating/proportional control the output varies continuously and is not limited to being fully open or fully closed. Proportional means that the size of the output is related to the size of the error detected by the controller. The key phrase for modulating/proportional control is “Continuous Control Action.” The sensor, controller, and final control device act as one unit to maintain constant precise control over the controlled medium. Continuing with the previous example, when a modulating system senses a deviation from the set point of 68 degrees, the controller calculates the amount of the error (1 degree less than set point) and sends a signal to the actuator, which will drive open the final control device (valve or damper) by a certain percentage of the controlled medium’s set point deviation (1/2 degree) to maintain set point without over-shoot. The controller calculates how much the final control device needs to open without over-shoot and will start reversing the actuator to close the final control device to a percentage of the closed position to maintain set point.
Popular modulating control signals include 4-20 ma and 0-10 volts. If you were to look into a control panel like a Hoffman Enclosure you might see controls like a Honeywell UDC3200 that could be taking a 4-20 ma signal from a device like a Hawkeye 908 current transmitter and based on the control input signal from the Hawkeye 908 ( which would most likely be a 4-20 ma signal) the UDC 3200 controller would respond with a 4-20 ma output signal to a device like a Honeywell Variable Frequency Drive which would control either a fan or a pump. This is an example of how a proportional signal like a 4-20ma signal is used in modern HVAC controls.
If you are in Georgia or Florida,the control pros at Stromquist & Company can answer your control questions.
Check out Sophia Bellos as she shows us why Honeywell’s direct coupled actuators are a great choice. Sophia demonstrates unique features that save time and money on valve and damper installations including Honeywell’s new Zelix Actuator.
Stromquist & Companykeeps a large inventory of these products in our Atlanta and Florida locations so if you are a Stromquist customer or are located in Georgia or Florida call today for a free catalog. Others can contact one of our affiliates at Controls Group North America.
Honeywell’s new Zelix spring return direct-coupled actuators were designed to be small but powerful. They are ideal for valve and damper applications that require a small footprint but lots of torque. The light, compact package offers 27 or 44 in-lb of torque, which is 25% more than competitive models.
It doesn’t stop there though. The Zelix actuators have a lot more going for them. For one, to make selection easier, there are only 7 models per torque level. With the exclusive Honeywell mode selector, one model can operate in different control modes by just turning a dial. Another great thing is that they have a self-centering shaft adapter that grabs the shaft with one screw turn, so you don’t have to waste time with U-bolts. They also can save time and money during installation since they have a unique wiring access cover that eliminates the need for a junction box.
If you want to find out more about Honeywell’s Zelix line, you can call Stromquist at 404-794-3440 or click here. If you are located outside the states of Georgia or Florida, we can refer you to one of our affilates at Controls Group North America.
Watch as we walk you through the fantastic package Belimo has created to make sure you have all of the parts and pieces you need for the job site.
Visit www.belimo.us to find out more about Belimo America.
The latest accurate information and demos on products
