Product Spotlight: Johnson Controls V46 Series of pressure actuated modulating valves.

Produced for both refrigerant systems as well as saltwater applications, the V46 series from Johnson Controls features numerous benefits.  This series was designed to be “direct-acting” with quick open option on increased pressure, and “reverse-acting” to close on pressure increase.  These devices control water flow to a condenser by sensing the changes in pressure through a refrigerant cycle.

The valve design is pressure balanced so that the setpoint is separate from the water inlet pressure.  These include pressure resistant bellows where refrigerant pressure grows up to 28-bar.  Likewise, the V46 series is pressure-actuated for fast and direct variations in pressure. They offer a high flow capacity with their smaller dimensions, in both angled body types and straight line, available in 3/8”, ½” and ¾” for a high Kv value.

The V46 pressure actuated valve with angled body type

Other features include:

Reduced Hysteresis: The close fitting and sliding parts are within water passages.

Easily Disassembled/Replaced:  Valve is designed for easy repairs “in line”.

Durability: bodies and monel parts are made of special bronze, excellent for sea water applications.

Power Elements:  Some models include stainless steel bellows for applications with ammonia filled equipment.

Connection Styles Options:  A wide range of types to meet various requirements.

Nickel Plated Seats:  available on valve sizes of 3/8", ½" and ¾” openings, they offer resistance against corrosion, cavitation and erosion.

Control Action:  Direct or reverse action can be factory changed to suit your application.

JCI notes that all of the V46 series regulating valves were designed as operating devices only.  In several applications where valve failure might result in personal injury or loss of property, it is required to install a separate safety shut off valve. 

For all of your pressure actuated modulating valves or many other products produced by Johnson Controls Inc, visit E-Controls.net, today!  

E-Controls.net.  Your Online Source For Building Automation Supplies.

Product Spotlight: The C2DOS Series CO2 Transmitters from Greystone Energy

Greystone Energy released the C2DOS Series in 2022, replacing their CDD4 series of room CO2 transmitters with optional temperature sensing.  This device employs an accurate “non-dispersive infrared” or NDIR sensor within a vented, weatherproof enclosure which monitors outside levels of Carbon Dioxide.  Using dual-wavelength optics and LTA (long-term adjustment) signal processing, this technology provides both reliability and long-term accuracy.

The C2DOS Series replaced the CDD4 Series

Having infrared technology to monitor CO2, the transmitter operates with a linear 4-20 mA or 0-5/10 Vdc signal for outputs which are field selectable.  The unit enlists a programmable CO2 measurement span, and the display features a back-lit alphanumeric LCD that includes user-friendly menu for quick set up.  Greystone produces the C2DOS with optional features, including resistive temperature sensors (NTC, Type 2 and 3, 100 Ohm Platinum, and 1000 Ohm Nickel to name a few), a control relay option with programmable setpoint, hysteresis and time delay, and a heated or unheated enclosure.

The outside carbon dioxide transmitters are 5.3” wide by 7.2” tall, and 3.5” deep.  This series includes .85” knockouts for conduit connections and can be mounted directly to building wall face using provided mounting holes.  It connects to a Building Automation System using the 3 wire configuration with screw block terminal provided.

The CD2OS series of Outside Carbon Dioxide Transmitters are backed by Greystone Energy’s standard five (5) year limited warranty.  For more information on this device see the forms at their respective links below:

Submittal https://downloads.greystoneenergy.com/Submittals/PS-CD2OSXXX.pdf

Installation Instructions https://downloads.greystoneenergy.com/Install%20Notes/IN-GE-CD2OSXXX.pdf

Declaration of Conformity http://downloads.greystoneenergy.com/Website%20Documents/Declaration%20CD2OS%20Series%202022.pdf

For all of your CO2 transmitter needs, or to find a complete line of the product offerings from Greystone Energy, please visit E-Controls.net:  Your Online Source For Building Automation Supplies.