Powers e420UCM Series Under-the-Counter Thermostatic Tempering Valves - Manual

HydroGuard ® Series e420
Under-the-Counter Thermostatic Tempering Valve
Technical Instructions
IS-P-e420UCM
Advanced Thermal Activation
Specifications
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Connections ..................................................................................................................................1/2" NPT Inlets and 1/2" NPT Top Outlet
Capacity (without checkstops) ..................................................................................................4.25 gpm (16.0 L/min)*
....................................................................................................................................................(±0.25 gpm [0.95 L/min])
Maximum Hot Water Supply Temperature ..............................................................................190°F (88°C)
Minimum Hot Water Supply Temperature ..............................................................................10°F (6°C) above set point**
Maximum Operating Pressure ....................................................................................................125 psig (862 kPa)
Temperature Ranges:
Standard ...................................................................................................................................65-115°F (18-46°C)
Low ............................................................................................................................................40-90°F (4-32°C)
High ...........................................................................................................................................120-175°F (49-79°C)
Maximum Static Pressure ...........................................................................................................125 psig (862 kPa)
Minimum Flow: ..............................................................................................................................2.0 gpm (7.6 L/min)
Listing ..............................................................................................................................................ASSE 1070
Shipping Weight ............................................................................................................................5 lbs. (2.3 kg)
* At 45psi differential (310 kPa), with hot water supply between 140°–180°F (60–82°C) and 50/50 mix.
**not applicable to low temperature hot water valves
Description
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Hydroguard Series e420 Under-the-Counter thermostatic
tempering valves are designed for all applications where the
temperature of generated hot water must be controlled for
safe, economic use. A powerful advanced thermal actuator
quickly senses and compensates for temperature fluctua-
tions induced by water temperature and pressure changes in
the supply line.
Rugged construction features cast brass body and corrosion-
resistant internal components for years of dependable, trou-
ble-free service. Hex socket makes temperature adjustment
quick and easy.
For restricted access control, the Series e420 valve can be
housed in a stainless-steel or white baked enamel steel cabi-
net and can be packaged with solenoid valve(s), checkstops
or other accessories common to Powers’ cabinet supply
offering.
Operation
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Hot and cold water enter respective ports in the valve and
mix in a chamber containing an advanced thermal actua-
tor (refer to cutaway view). This actuator controls the valve
assembly.
Rotating the adjustment handle repositions the shuttle in the
cartridge assembly to produce the desired temperature. If the
hot or cold supply water temperature or pressure changes,
the thermal actuator will contract or expand. This movement
repositions the shuttle to maintain the desired temperature.
Cold Water Supply Shuttle
Adjustment
Stem
Advanced thermal Actuator
Shutoff Disk Cartridge Hot Water Supply