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Asked: October 21, 2020In:
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burst protectionfreeze protection
  1. VacuumFurnaces.com Answers

    Freeze Protection requires a glycol concentration level sufficient to prevent the formation of ice crystals at the lowest temperature experienced by the fluid. Freeze protection is imperative when the system requires pumping. Slush is formed when you get colder than its freeze protection rating. BurRead more

    Freeze Protection requires a glycol concentration level sufficient to prevent the formation of ice crystals at the lowest temperature experienced by the fluid. Freeze protection is imperative when the system requires pumping. Slush is formed when you get colder than its freeze protection rating.

    Burst Protection only requires a glycol concentration high enough (generally 30% by volume or more) to prevent bursting and other mechanical damage from freezing, but not necessarily high enough to keep the fluid pumpable. Burst protection requires less glycol than freeze protection and is suitable for chilled water systems that are dormant in the winter. As the temperature drops below the freezing point of the fluid in a system with burst protection, ice crystals begin to form, and the solution becomes a slush. The fluid expands as ice is formed. This mixture may or may not be pumpable, but it is fluid enough so that the excess volume flows into an expansion tank without damage to the system. As the temperature drops further and all the water freezes, the glycol will begin to freeze and contract.

    Source: Dry Coolers

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Asked: September 26, 2020In:
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water cooling system pump
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    If it sounds like there are marbles in your pump, it is more likely caused by cavitation. Cavitation is caused by a rapid change in water pressure that leads to the formation of vapor-filled cavities. These pockets can and will ruin your pump impeller and should be corrected immediately. Poor suctioRead more

    If it sounds like there are marbles in your pump, it is more likely caused by cavitation. Cavitation is caused by a rapid change in water pressure that leads to the formation of vapor-filled cavities. These pockets can and will ruin your pump impeller and should be corrected immediately. Poor suction conditions are the most common cause.

    Source: Dry Coolers

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Asked: September 26, 2020In:
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air purgingoverhead pipes
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    A properly designed system will have ports at the high points for venting air. While the system is running, vent the high points in the process discharge piping to remove air from the pipe. Most problems with the initial start-up are associated with filling the system and releasing air out of the prRead more

    A properly designed system will have ports at the high points for venting air. While the system is running, vent the high points in the process discharge piping to remove air from the pipe. Most problems with the initial start-up are associated with filling the system and releasing air out of the process piping. Blocked air can resist or prevent proper water flow. We do NOT recommend automatic air release valves. They are too prone to leaks.

    Source: Dry Coolers

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Asked: September 20, 2020In:
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pump size
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    Typically, the piping should be sized large enough so that frictional pressure drops within the piping system make up less than 10% of the operating pressure of the system. For example, a system operating at 100 psi should have less than 10 psi of frictional pressure losses in the piping system. PreRead more

    Typically, the piping should be sized large enough so that frictional pressure drops within the piping system make up less than 10% of the operating pressure of the system. For example, a system operating at 100 psi should have less than 10 psi of frictional pressure losses in the piping system. Pressure losses in a piping system can be readily determined using the “equivalent length” method that is found in most piping handbooks. Since most piping systems are not complex, we have developed over the years a simple rule of thumb for sizing the piping. We generally recommend 5-10 feet per second in the supply pipe and 3-5 FPS in the return pipe.

    Source: Dry Coolers

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Asked: August 26, 2020In:
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glycol
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    It is often necessary to determine the volume of water held in a cooling system so that appropriate concentrations of corrosion inhibitor and/or glycol can be added. The volume of water in your system is determined by adding the volume of water in your pipes, tanks, cooling equipment, and your proceRead more

    It is often necessary to determine the volume of water held in a cooling system so that appropriate concentrations of corrosion inhibitor and/or glycol can be added. The volume of water in your system is determined by adding the volume of water in your pipes, tanks, cooling equipment, and your process equipment. At your request, Dry Coolers can provide the cooling equipment volumes.

    The following table may be used as a guide for determining the volume within pipes.

    SYSTEM VOLUME CALCULATIONS:
    Volume in Piping
    Volume in Tanks
    Volume in Equipment
    TOTAL VOLUME (GAL)

    Source: Dry Coolers

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