bi pass valve0 pages

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BI-PASS VALVE

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f » I HENRY

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I TECHNOLOGIES

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Valve

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Features:

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• Brass construction

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• 58" O.D.S. extended brass connections

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• Positive pressure relief

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• Consistent operation

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• Excellent reseating characteristics

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• Suitable for refrigerants 12, 22, 500, 502,123,134A, and

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other industrial fluids non-corrosive to brass, steel and Teflon

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• Factory set and sealed

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Notes:

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The Henry By-Pass Valve utilizes a designed to handle

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momentary instances of over pressure (not a fire). It by-passes

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excess pressure to the low side of the system thus preventing

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the catastrophic relief valve from discharging refrigerant into

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the atmosphere. If the over pressure increases then the

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catastrophic relief valve will be activated.

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The By-Pass Valve is an indirectly spring loaded diaphragm

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type of valve. System pressure acts on the diaphragm causing

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the piston to lift from the valve seat. The valve has relatively

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low flow rates. It's primary function is to by-pass only enough

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gas so as to reduce the effects of a high pressure spike. High

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flow rates would adversely affect system performance.

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Continued by-passing of refrigerant for extended periods of

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time can lead to loss of system capacity, excessively high

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temperatures at the compressor and possible compressor

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failure. We recommend a sensor be put in the discharge line

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from the valve to monitor if the valve is relieving from the high

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side to the low side. Orders must specify pressure setting in

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the range of 150 to 450 PSI.

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Standard settings are:

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5467-250 PSI (For 300 PSI, Relief Valve)

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5467-290 PSI (For 350 PSI, Relief Valve)

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5467-330 PSI (For 400 PSI, Relief Valve)

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5467-350 PSI (For 425 PSI, Relief Valve)

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5467-375 PSI (For 450 PSI, Relief Valve)

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At what pressure should these devices be set? A typical

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installation with a pressure vessel having a maximum working

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pressure of 400 PSI might be:

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Relief Valve: Set the design working pressure 400 PSI of the

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vessel or 25% higher than the maximum working pressure of

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the system.

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High/Low Side Valve: Set at approximately 330 PSI 80-85% of

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the relief valve setting.

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HENRY® Industrial & Commercial Refrigeration Products 800.96.HENRY

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VALVE ~

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H26

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