ATi Max Series. Pressure Independent Control Valves 2 Way 2-1/2-6

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1 The Auto Touch Independent Max (ATiMX) valve brings pressure independent control technology to valves up to 6 and flow rates up to 468 GPM. It is a state-of-the-art control valve combining a high quality/ high rangeability temperature control valve with a dynamically balanced flow regulator in the same space-saving housing. The result is a pressure independent control valve that maintains the desired flow rate irrespective of the pressure differential across the valve. Even the most controllable standard (pressure dependent) temperature control valve will allow a change in flow as the differential pressure in the system changes, which is an everyday occurrence. Any time a chilled water or hot water system is operating at less than design maximum load conditions which is most of the time differential pressures in the system tend to increase, resulting in overflow through the control valves. This overflow condition results in control instability, and higher pumping costs. Balancing valves, either manual or automatic, can only prevent overflow at conditions above design maximum flow. At any flow condition less than design maximum, balancing valves do not fulfill any purpose. The ATiMX valve provides a cost effective means of controlling hot water and chilled water flow in an accurate and stable manner while minimizing pumping, heating and cooling costs. And by combining the automatic temperature control function and the dynamic balancing function in a single device, installation costs are also reduced. ATi Max Series Pressure Independent Control Valves 2 Way 2-1/2-6 08/23/16 ATiMX Valves are also available with an optional strainer/drain with isolation valve to provide a complete and convenient solution for controlling and maintaining the coil. Features and Benefits Provides accurate, pressure independent control at all levels of demand More precise and stable control Eliminates overflow at less than design demand conditions Reduces pumping energy and contributes to higher chiller and boiler delta T Combines flow control and dynamic balancing in a single space-saving device Reduces field installation costs Eliminates field balancing Reduces total system costs and speeds the project towards completion faster AM-1

2 ATi Max - Specifications ATi MAX GENERAL DESCRIPTION ATi Max Series Valves are self-balancing, dynamic flow control valves that are pressure-independent, two-way, modulating to accept digital or analog input signals. The valves accept 0-10V DC, 2-10V DC, 0-20mA, 4-20mA or 2-position / 3-point floating input signals. Each valve has an adjustable maximum flow rate setting to enable flow limitation and balancing to the coils or zones that the valves are controlling. All ATi Max actuators are microprocessor-based with a self-calibrating feature. Technical Specifications - Valve Body Valve Body 2-1/2 6 Static Pressure 580 PSID (40 bar) Media Temperature -4 F to 248 F (-20 C to 120 C) Body Material Ductile Iron, ASTM A395, Class Flow Regulation Unit 316 Stainless Steel Diaphragm Hydrogenated Acrylonitrile-Butadiene-Rubber End Connections Refer to Dimensions O-Rings EPDM Test Ports 1/4 NPT Max. Close-Off Pressure 100 PSI (700kPa) Max. Operational P 87 PSID (600kPa) Shut-Off Leakage < 0.2% of Cv Flow Rate Range l/sec, GPM Technical Specifications - Strainer Pressure Rating 175 PSI (12 bar) Temperature Rating 150 F (65 C) Body Material Cast Iron ASTM A126 Class B End Connections Flanges ANSI B16.1 Class 125 Strainer Stainless Steel 304 ASTM A167 Technical Specifications - Actuator - BMT-BMFS (FS=Fale Safe) Supply Voltage Power Consumption 12VA Frequency Hz Control Input 0-10V DC, 2-10V DC, 0-20mA, 4-20mA or 2-position / 3-point floating Feedback Position Output Automatic match of control input, 0-10V DC, 2-10V DC or 4-20mA, Turn Time 190 seconds (from closed to fully open) Feedback Position Automatic match of control input, Output 0-10VDC, 2-10VDC or 4-20mA Electrical Connection 5 wires halogen free cable, 3.28 ft. Direction of Rotation Bi-directional Housing Material UL94 V0-rated plastic Humidity Rating 5 to 95% RH, non-condensing Housing Insulation IP54 including up-side down mounting Ambient Temperature 14 F to 122 F (-10 C to 50 C) Programming External programming of all settings, interface of buttons and display Calibration Automatic calibration at startup Disclaimer - The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the local Bray office. Bray, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. AM-2

3 ATi Max - Operation ATi Max Valve Operation The plug of the valve is positioned by a multi-turn electric actuator in response to temperature controller or building automation system. Inlet pressure is transferred through an internal channel to a diaphragm in the pressure compensating section. This diaphragm is opposed by a spring. The force-balance principle moves the diaphragm to create a constant ΔP across the control section, which results in constant flow at any valve position, irrespective of pressure changes in the system. The maximum flow rate is established by controlling the stroke of the actuator. ATi Max - Valve Sizing Unlike conventional control valve sizing where valves are sized to a Cv, the ATi Max valves are simply sized for flow and pipe size. Refer to the ordering table for the wide range of flow values available. IMPORTANT: Valve diameter should NEVER exceed pipe diameter! ATi Max - Installation Contrary to traditional static balancing systems, dynamic balancing requires no main branch balancing valves. Principle of Operation ATi Max valves contain a diaphragm component mounted on a counter-acting coil spring which adjusts the pressure differential across a pre-set valve opening. The combined components operate very similar to two valves in series, where one is a pressure differential regulator and one an adjustable orifice. This is illustrated below. When the ATi Max valve is used at each terminal, the total flow rate of the branch will automatically be limited to the sum of the flow rates of the circuit. The ATi Max valve can be installed either in the supply or in the return line. The valve should be positioned for easy access to the adjustment and pressure measurement devices. Unlike traditional balancing valves, placement of the ATi Max does not require lengths of pipe before or after the valve. ATi Max - Piping top pressure port is upstream, the bottom port is downstream. AM-3

4 ATi Max - Internal View & Digital Display Overview Position Display Actuator: Flow Rate can be determined by reading value on top of actuator. Multi turn actuator: Six full 360 rotations make the ATi Max the most accurate valve in the industry. PROGRAMMING MENU The programming menu is always accessible. To enter the programming menu, please simultaneously press and for 6 seconds, until bottom line blinks. Alarm Indicator Operational Information Generally, press to accept value and go to next step and press button to go to previous step. To change the value, please press or keys, for quick scroll through values hold down the button. Press and simultaneously for 6 sec. to exit programming menu. Battery Level! L/hr GPM L/sec mavdc Actuator will automatically return to operation mode if no action is detected on arrow keys during 1 minute. Indicates actual current flow rate. Internal View ATi Max Buttons Unit Scale System Automatic Pressure Compensating: Spring and diaphragm move according to pressure differential maintaining a constant pressure drop across the flow control port. Pressure / TemperatureTest Ports: Enable easy pressure differential readings. Flanged Connection: 2-1/2 to 6 and with ANSI Class 150 or Class 300 flanges. Manual Operation: Valve can be operated in the event of a power failure. Sizes available: 2-1/2 to 6 Maximum high limit flow rate: 41 to 468 GPM. AM-4

5 ATi Max - Dimensions B ATi Max Dimensions, 2-1/2-6 - with Actuator MODEL #, PREFIX, Size A B C Weight ATiMX Size in. mm in. mm in. mm in. mm lbs. kg. ATiMX-S ATiMX-M C ATiMX-L Measurements and Weights include Actuator Add connection lenght to body length A Port 1 ATi Max Strainer Dimensions, 2-1/2-6 B C MODEL #, PREFIX, Strainer Size SD-250 SD-3 SD-4 SD-5 SD-6 Size A B C Hole. of Drain Size Weight in. mm in. mm in. mm in. mm Dia. Holes in. mm lbs. kg / / / A ATi Max - Flange Compatibility Chart ATi MAX VALVE MODEL # PREFIX ATiMX Size ATiMX-S ATiMX-M ATiMX-L Please allow 2% tolerance Weld Neck Slip On Weld Neck Slip On Connection ANSI ANSI DIN DIN in. mm Class 150 Class 300 Class 150 Class 300 PN 10 PN 16 PN 25 PN 40 PN 10 PN 16 PN 25 PN / IMPORTANT: Valve diameter should NEVER exceed pipe diameter! AM-5

6 ATi Max - Flow Rate Table Model no. Valve size Control range Minimum setting Maximum setting mm inch kpad psid l/sec l/hr GPM l/sec l/hr GPM S / M M M L L Accuracy: Greatest of either ±5% of controlled flow rate or ±2% of maximum flow rate. ATi Max - Actuator Wiring DIGITAL - 2 POSTION ANALOG Black Blue White Green Common Control Signal Feedback Supply 24V AC/DC Supply 24V AC/DC Black Blue White Red Green DIGITAL - 3 POINT FLOATING Black Blue White Red Green Common Open if N.C., Close in N.O. Close if N.C., Open in N.O. Feedback Common Open if N.C., Close in N.O. Close if N.C., Open in N.O. Feedback ATi Max - Model Number Matrix ATi Max = AutoTouch independent Max Coil Control System Sample Model Number ATiMX M 222 BMT SD4 BF4 RETURN Select the Proper ATi Max Prefix ATiMX Size and Maximum Flow Rate: See Flow Rate Table (See chart above) Select BMT-NON Fail Safe or BMTFS-Fail Safe SUPPLY Strainer/Drain Valve N = Strainer Drain Valve or SD250 = 2.5 SD5 = 5 SD3 = 3 SD6 = 6 SD4 = 4 MANUAL Manual Shut-Off Valves N = Shut-Off Valves or BF250 = 2.5 BF5 = 5 BF3 = 3 BF6 = 6 BF4 = Bray International, Inc. AM-6

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