Equipment Brochure

CFAM-TX SeriesFully Automatic Switchover Manifolds

for Liquid Cylinders - Temperature Actuated (Liquid Withdraw / Liquid Dispense)

Typical ApplicationLiquid Nitrogen

Supply to Cryogenic Freezers

More Economicalthan the

Scale-Operated Unitwith Similar Benefits

Key Features

Fully Automated Switchover Process Triggered by Temperature, Pressure & TimeThe PLC ensures that several conditions are met before switching over from a depleted “In Service” bank to a full “Stand-By” bank.

Field-Changeable Switchover Parameters The LCD screen and keypad allows you to customize the basic switchover parameters that better suits your operating conditions.

Good for Cryogenic Liquid Cylinders OnlyInlet Pressure Up to 235 PSIG

DescriptionThe BeaconMedæs CFAM Series Fully Automatic Switchover Manifolds assures a continuous supply of liquid cryogens. It is set to transfer automatically from a depleted “In Service” supply bank to a “Stand-By” supply bank based on the pressure of cryogenic liquid (or carbon dioxide) in the cylinder.Visual Indicators - There are six lights (LEDs) indicating the status of each bank. The green light indicates which bank is “In Service.” The yellow light indicates the bank in “Stand-By.” The red light indicates a “Depleted” bank.Audible Signal - The buzzer is actuated each time a bank is depleted. The silence Push Button kills the buzzer without extinguishing its corresponding red light.Reset Push Button - The reset Push Button needs to be pushed when an empty cylinder has been replaced by a full cylinder.PLC - The CFAM-TX is driven by a Programmable Logic Controller (PLC). The PLC gets signals from the three (3) pressure transmit-ters and the two (2) temperature transmitters of the CFAM-TX manifold to determine when the “In Service” liquid cylinder is depleted and it is now time to switch over to the “Stand By” liquid cylinder. There is also a factor of time in the switchover process. This time fac-tor is important primarily due to the cool down process of the different components of the system. It is very important to understand that the switchover process takes several minutes. For faster and more accurate response, the scale-actuated manifold (CFAM-WX) should be seriously considered.LCD Screen and Keypad - Some parameters of the switchover process are field changeable to better suit your applications. Among the parameters are the switchover temperature, the switchover pressure and the cool down lag time. In normal operation mode, the LCD screen indicates the actual system conditions.ICE AND WATER MANAGEMENT - There will be some “water management” required with this equipment. Because air is always humid and the wetted components are extremely cold, the ambient air humidity (water vapor) will freeze up on the wetted parts and ice will accumulate. When the equipment will not be in service, the ice will melt and water will drip down. The amount of water will vary upon the relative humidity of the air and the usage of the cryogenic manifold.

Equipment OverviewMANIFOLD CONTROL BOX

BUZZER (1X)

CRYOGENIC SPRINGLOAD CHECK VALVE (2X)

SILENCE PUSH BUTTON (1)

“IN USE” GREEN LED

“READY” YELLOW LED

“EMPTY” RED LED

“RESET” PUSH BUTTON

EMERGENCY STOP

CRYOGENIC LIQUIDOUTLET

CRYOGENIC LIQUID INLET(LEFT BANK FLEXIBLE HOSE)

CRYOGENIC LIQUID INLET(RIGHT BANK FLEXIBLE HOSE)

SOLENOID VALVE (2)

TEMPERATURE TRANSMITTER (2)

THERMAL EXPANSIONCRYOGENIC PRESSURE RELIEF VALVE (3X)

RELIEF VALVE OUTLET(1/2” COMPRESSION)

TOUCH SCREEN AND KEYPAD

STRUT WALL FRAME

CFAM-TX Series

Fully Automatic Switchover Manifolds for Liquid CylindersTemperature Actuated (Liquid Withdraw / Liquid Dispense)

How it Works - A Case StudyLiquid Nitrogen Supply to a Cryogenic Freezer

CFAM-TX SERIESLiquid Nitrogen Supply Manifold

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ELECTRICAL SIGNAL Signal coming from the cryogenic freezer calling for liquid nitrogen

Liquid Nitrogen Cylinder

2Liquid Nitrogen Cylinder

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CRYOFAST SERIESVacuum Jacketed Piping(Liquid Nitrogen Piping)

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4LIQUID NITROGEN CRYO-FREEZER

(Supplied by Others)

Our policy is one of continuous research and development. We reserve the right to modify without notice the specifications given in this document.

CFAM-TX Series

Fully Automatic Switchover Manifolds for Liquid CylindersTemperature Actuated (Liquid Withdraw / Liquid Dispense)

OPERATIONLIQUID NITROGEN SUPPLY MANIFOLDThis manifold draws liquid nitrogen from liquid cylinders (one side at a time). It is looking at several parameters such as liquid cylinder pressure, pipeline pressure, liquid cylinder pressure and piping temperature to determine when a liquid cylinder bank is depleted.

LIQUID NITROGEN CYLINDERSLiquid nitrogen cylinders come in different size and different pressure relief valve pressure. For liquid nitrogen dispense, which is the case for our example, the liquid cylinder pressure relief valve is set at 22 PSIG. At least one liquid cylinder per side is required.

VACUUM JACKETED PIPINGSeveral types of liquid nitrogen transfer piping are available on the market. The best way to bring liquid nitrogen to a cryogenic freezer is to use a vacuum jacketed pipe. That type of piping minimizes waste of valuable of liquid nitrogen during the cool down process of the piping and the normal heat transfer with the ambient air. The CryoFast Series piping is best suited for small systems (normally under 40 feet) such as cryogenic freezer applications. For larger systems, you should consider the CryoPipe Series (consult BeaconMedæs for details).

CRYOGENIC FREEZERThere are several types, brands and sizes of cryogenic freezers. Some freezers are mechanical with a liquid nitrogen back up supply whereas others use liquid nitrogen as a means of freezing samples. The liquid nitrogen inlet on a cryogenic freezer is normally located at the lower back of the equipment.

ELECTRICAL SIGNALThis is a very critical part of a well designed system. The CFAM-TX is equipped with a pressure transmitter located at the outlet of the manifold. The PLC is programmed in such a way that it is monitoring the pipeline pressure. The pipeline pressure itself is not always a good indication as to wether or not liquid nitrogen is required. The most accurate way is to get a signal from the cryogenic freezer. Because most freezers don’t have that kind of signal available, an electrician will be required to connect a wire parallel to each freezer solenoid valve and connect that wire to the CFAM-TX Series manifold. Each time power (electricity) will be detected by the CFAM-TX Series manifold, the liquid nitrogen supply cycle will begin.

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1800 Overview Drive, Rock Hill, SC 29730Tel.: (803) 817-5600 Fax: (803) 817-5750 www.Beaconmedæs.com

Printed in the U.S.A. July 2013, R0

Brochure no.: RB-CFAMTX-3021

Ordering Information

Dimensions MaterialsEnclosure Polyester with Stainless Steel Hinges

Headers Silver Brazed Brass

Tubing Stainless Steel 316

Fittings Brass - Stainless Steel 316

Hoses Stainless Steel (All Wetted Parts)

Solenoid Valves Bronze/Brass - Teflon Stainless Steel

Relief Valves Brass - Teflon - Stainless Steel

Wall Rack Aluminum Strut with Galvanized Fittings

Pressure Switches Brass - Viton

SpecificationsFluids Refer to part number matrix

Maximum Inlet Pressure Up to 235 PSIG

Operating Temperature -425oF to 100oF

Power Requirement 110 VAC, 1 Ph, 10 Amp

Pressure Relief Valve 50 PSI or at 250 PSI

Inlet Connections Gas Specific CGA fittings

Outlet Connection 1/2” F.NPT

Audible & Visual Alarm 85 dBa

Alarm Signal Dry Contact (N.O.)

Hose/Pigtail Length 72 inches (Standard)

External Alarm Signal C-Style Dry Contact (NO, NC, COM)

CFAM-TX

Fluid

No. of Cylinders

Hoses

Options

Installation Hardware

Liquid Cylinder Used

Inscribe

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Liquid ArgonLiquid NitrogenLiquid Oxygen

CGA 295CGA 295CGA 440

Inscribe the no. of liquid cyl. per side (must be pair)

Stainless SteelStainless Steel with GuardVacuum Jacketed

SSHSSHGVJH

Outside InstallationUltra High Purity Cleaning

3RUHP

Wall mount bracketFloor Stand

WMFS

22 PSIG235 PSIG

22235

CFAM-TX Series

Fully Automatic Switchover Manifolds for Liquid CylindersTemperature Actuated (Liquid Withdraw / Liquid Dispense)