Vernatherm Freeze Protection Valve Model KC4500-01, 45F
Discharge
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WARNING: See critical
warning below relating to proper selection of valve model related to
application.
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Keep your solar collectors and exposed pipes from freezing with the
Vernatherm solar freeze protection valve
The Vernatherm valve contains a thermal actuator that opens the valve when
the temperature approaches freezing and re-closes it upon warm up. This is a
continuous process of modulation; cold water is discharged and replaced by
warmer water preventing panel and piping freeze up.
This valve features a
patented anti-seize feature which ensures longevity and durability you can
depend on, through the years this valve will not seize due to corrosion, and
will continue to function.
Freeze protection valves use reliable, non-electric, self-contained paraffin
wax motors (thermal actuators) which automatically respond to temperature
fluctuations. Usually in freeze protection applications, the valve port opens on
temperature drop, allowing liquid that would normally freeze to be discharged
and replaced with warmer fluid within the system. When warmer temperatures
are detected by the thermal actuator within, the valve will automatically close
the valve and the discharge cycle stops.
This cycle will repeat as often as necessary to prevent freezing. The
amount of fluid discharged depends on ambient air temperature, and fluid
temperature. The system is functioning properly when fluid is being
discharged from the valve in near freezing conditions. The Vernatherm valves
features sets these valves apart from the competition!
Product Features
• ˝" Male NPT Fitting
• Anti-seize feature ensures longevity and
durability
•
Anti-insect design prevents any insect from making this valve
its home and causing a failure
• Compact
design for easy install - weighs only 4oz
• UV resistant body
material
• Stainless steel inlet
debris screen
• Discharge temperature set to 45F
• Internal filter screen
• FDA and NSF listed materials
• 100 psi maximum operating
pressure
• Complete
mechanical operation
• Tamper resistant design
• Corrosion resistant
materials
• Non-electric
function
Product Application: Solar Domestic Water Heating
System
Product Function: Protects solar collectors and
exposed piping from freezing
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A
typical solar domestic water heating system components and layout is shown
below.
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Download » Vernatherm Valve Data Sheet
NOTE: During cold weather, it is normal for the valve to
dispense water from its discharge port even when ambient air temperatures are
several degrees above
freezing.
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Product Warranty: 1 Year Manufacturer Warranty
Product Manufacturer: Rostra Vernatherm, LLC
WARNING: Solar collectors can reach
internal temperatures up to 10 degrees below the outside ambient air
temperature. Standard Active Open Loop Solar Systems typically require a 45F
valve to ensure proper protection. Passive Batch or Integrated Collector
Storage (ICS) systems such as the ProgressivTube have a much larger volume and
mass of stored water, and will not freeze as quickly as a Active Open Loop
Solar System, therefore they can typically utilize a 35F valve.
This
condition results from a phenomenon known as "night-sky emissivity". The
emissivity of a material is the ratio of energy radiated by the material
(solar panel) to energy radiated (or absorbed) by a black body (the sky); it
is a measure of a material's ability to absorb and radiate energy.
Since solar collectors are coated with a black surface they are very
good at conducting and emitting energy. When the outside temperature approaches
freezing, the surface of the solar collector begins to emit energy to the
night sky. When the atmosphere is clear with no clouds, the transfer of energy
is accelerated.
In layman terms, this means that on a cold clear
night, the water in the solar panel can be up to 10 degrees colder than the
outside temperature. A Freeze Protection Valve needs to begin opening when the
outside temperature drops to 42 degrees and below. As the temperature drops
from 42 to 32 the volume of water discharged from the valve increases.
Consult the owner's manual of your collector and/or system to determine
the correct valve model to use; Solar Direct and/or The Energy Supermarket
makes no claim as to the correct valve to use, and/or its usage and
application; and assumes no liability for damages resulting from correct or
incorrect use of this product.
WARNING: Do
not expose valves to temperatures above 300F (148.8c) as this may damage the
valve.
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time. Orders placed after 2PM EST may not begin processing until the next
business day. Please call for Rush Processing and/or Rush Shipping
options.
