Danfoss ESBE VTC 511 Data sheet

Datasheet
ESBE VTC 511
3-Way Thermic Valve
Applications:
Typical Applications:
High mass non-condensing boiler coupled
with low return water situations, i.e. snow melt systems or high mass concrete radiant floor heating
Gravity hot water conversion systems
Solid fuel boilers feeding storage tanks or
a heating system
Solar heating and stratification control for
storage tank
The ESBE VTC thermic valve is a thermostatic by-pass valve which regulates the temperature of either the supply out or the return of water in a hydronic heating system. In a conventional application, the VTC valve safeguards non-condensing boilers against corrosion from condensation that would result if a minimum flue gas temperature is not maintained. With the VTC the boiler is able to recover and keep up with the drop in water temperature. The VTC valve can also be used on a solid fuel boiler or a solar application where a minimum or maximum water temperature is trying to be maintained.
Features:
Thermostatically maintains a high and steady
return temperature increasing the life and efficiency of the heat source
Protection from thermal shock within non-
condensing boilers
Self contained thermostatic element with no
adjustment required
Interchangeable thermostat elements, to
meet temperature requirements
Low leakage rate through the ports of
the valve
Ordering Information:
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* Valve body and thermostat sold separately. Order one valve body and
VTC Valve Body, Without Thermostat*
Code No. Series Cv Valve Size
193 B1701 V TC511 16.2 1-1¼” FNPT
Internal VTC Temperature Element
Code No. Series Typical Application
193 B1702 122 °F (50°C)
193 B170 4 140 °F (60°C)
193 B1709 149 °F (65°C)
193 B170 6 176 °F (80°C)
Spare Parts
Code No. Description
98060150 O-ring for brass plug
one temperature element to assemble a complete valve
Return line boiler protection193 B1703 131°F (55°C)
Boiler outlet, storage tank feed193 B1705 158 °F (70°C)
Connection
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ESBE VTC 511 3-Way Thermic Valve Datasheet
ESBE VTC 511 3-Way Thermic Valve Datasheet
Valve Selection:
Piping Orientation:
Supply Mounted (149 °F (65°C), 158°F (70°C), 167°F (75°C) elements)
Circulator
VTC valve
Other location for circulator
Return Mounted (122 °F (50°C), 131°F (55°C), 140°F (60°C) elements)
Circulator
When the VTC is piped on the supply side out from the heat source, the valve will begin to allow water out to the system when the temperature of the fluid meets the temperature of the inserted thermostat element.
The VTC valve, when placed on the return side will open when the minimum return temperature of the element is reached. When the fluid temperature reaches 18°F (10°C) higher than the element’s temperature, the return port from the system will be fully open.
Technical Specifications:
Max. system pressure 145psi (10 bar)
Max. medium temperature 230°F (110 °C)
Min. medium temperature 32°F (0°C)
Fully open temperature differential 18°F (10°C) higher than temperature element
Max. differential pressure across:
B - AB & A - AB 14.5psi (1 bar)
B (О)
AB( )
Max. leakage rate
A(∆)
B - A 4.35psi (0.35 bar)
A - AB 1% of Cv
B - AB 3% of Cv
Allowable medium Closed loop system, Glycol mixture up to 50%
VTC valve
Other location for circulator
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ESBE VTC 511 3-Way Thermic Valve Datasheet
Systems Applications:
VTC Thermic Valve on Gravity Conversion System
Because gravity conversion systems contain an enormous volume of water, the water returning to the heat source could be significantly cooler, leading to condensation and a shorter life for the heat source. Adding a thermic valve to the system will prevent the boiler from sustained operation at temperatures below the dew point of their flue gases.
VTC Valve
VTC Valve on Multi-zone Systems with Circulators
Where a high mass non condensing heat source is matched with a large low temperature system, a situation could occur where the heat source is unable to keep up with the rate of demand from the system. The use of the thermic valve provides the opportunity for the heat source to catch-up.
VTC Valve
Charging of Storage Tank through Solar Heating
With the thermic VTC valve, an efficient method of charging a tank can be done. To achieve efficiency through the solar panel, cool water should enter allowing for a higher differential temperature across the panel. Additionally heated fluid from the panel should be properly distributed within the tank to reduce stratification i.e. even temperature distribution, within the tank.
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Dimensions:
A B C Depth Weight
Size in (mm) in (mm) in (mm) in (mm) lbs (kg)
1-¼” 4.13 (105) 1.50 (38) 2.95 (75) 2.17 (55) 3.04 (1.38)
Construction:
Valve body Nodular iron
O-ring EPDM
Thermostat cover Brass
Thermostat Copper
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and whether made available in writing, orally, electronically, online or via download, shall be considered informative, and is only binding if and to the extent, explicit reference is made in a quotation or order confirmation. Danfoss cannot accept any
responsibility for possible errors in catalogues, brochures, videos and other material. Danfoss reserves the right to alter its products without notice. This also applies to products ordered but not delivered provided that such alterations can be made without
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changes to form, fit or function of the product. All trademarks in this material are property of Danfoss A/S or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.
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