Air Tool Parts

Control Retrofits With Pneumatic Thermostats

George Fincher, engineer, used to be a California contractor. Now he is the president of Energy Controls Co. He had a dream in 2007 to utilize the proven pneumatic thermostats that have served the industry for more than 50 years, and combine them with battery power and wireless communications.

When he saw that the wireless industry was robust and dependable, Fincher decided it was time to start developing the ecWizard.

The PESC-F100 (ecWizard) offers an alternative to DDC retrofits of pneumatic systems. Its installation entails cutting a few pneumatic lines, the company said. Optional supply air sensors, room air sensors, and cfm sensors add to the monitoring opportunities.

Existing thermostats and control system remain intact; they are simply turned off like a wireless light switch.

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The wireless technology is the most exciting and potentially profitable opportunity in the controls industry today, said the company. Retrofits consist of 70-75 percent of existing control sales. The expected market in 2010 for controls is estimated at billion. The potential for the ecWizard is based on the installed base 60 million pneumatic installations in the world today.

Companies and products that make up the system include:

Tridium, which realized the potential of wireless controls, teamed with Jennic Corp. to produce the wireless module. Tridium’s Sedona framework and the Jennic send/receive radio are combined with ZigBee and 6loWPAN protocol.

Solidyne, whose top engineers are working for Energy Controls Co. along with Tridium and Jennic. Solidyne will be manufacturing the ecWizard in the Chicago area.

The Prophet line of products and dashboard technologies are aimed at filling the necessity for intelligent data visualization solutions within the building automation and energy management space. Providing a simple to use WYSIWYG (What You See Is What You Get) editor enables the integrator and end user to create and save custom views and dashboards for their real-time and historic data, while retaining the capability for ad-hoc analysis of the same data. The Prophet Touch is an embedded computer that comes preloaded with Niagara AX Platform, as well as Prophet software for plug-and-play installation.

The retrofit system provides a mesh network of wireless communications back to the ecHost powered by Tridium’s Jace and software. A typical 6LoWPAN system may include a number of wireless networks, connected using a wired bus such as an Ethernet, which is connected to the Internet.

One of the major problems with old pneumatic systems is that they are sometimes contaminated with moisture and oil, the company pointed out. When the new controller is installed, each zone throughout the system is purged of oil and moisture. It can also resolve comfort problems by helping thermostats perform optimally. It also provides zoning of unoccupied areas using an old sequence of operation called “Turn It Off!”

Introduction to the Hydraulic Control Valve

The prosperity of the modern industry has been doing great favors to our daily life and the industrial process. Actually, there comes a great variety of the valve types to meet the increasing requirements. Among the various types, the hydraulic control valve has been playing an important role in regulating the water.

The hydraulic control valve is the valve which is used to control the pressure. Generally speaking, it consists of a main valve and the matching accessories like the catheter, pilot valve, needle valve, ball valve and the pressure gauge. As to achieve some specified specifications, the manufacturers would produce various types of the hydraulic control valve according to the different operating functions and working conditions. For example, there are many further divided species. They are remote control floating ball valve, reducing valve, check valve, flow control valve and pump control valve and so on. Now, the details for two specified valve classified by the structure are introduced in the following.

Although with different structures, the two types works under the same principle which means the pressure difference. The one is called as the diaphragm type and the other one is called as the piston type. The pilot valve would lead the diaphragm or the piston to work. Then, the force gained by the water would start to adjust the device of the main valve to be totally opened or closed or under regulation. Or it can be said in details as follows. When the water above the diaphragm or the piston is poured into the lower area, the pressure below would be greater than that of the upper area. At this moment, the device of the main valve is pushed to be totally open. On the contrary, the device would be under the state of totally closed. And it the pressure is in medium scale, the valve is regulating the flow. No matter what, if the all parts cooperate together well, the valve would be able to perform under the pressure difference.

As we all know that the water project is generally important on all fields. Therefore, the hydraulic control valve continues to bring benefits. And in fact, there are many trials to improve the performance of this kind of the valve in order to service the future water project better.

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