Powers ES200/400 Emergency Tempering Valves - Manual

The Series ES Hydroguard thermostatically blends hot and cold
water to deliver tepid water to emergency fixtures, quickly
compensating for temperature variations due to changes in inlet
temperature or pressure. Powers’ exclusive Dual Internal
By-Pass* ensures cold water flow in the event of a valve failure
or loss of hot water.
* US Patent 6,575,377
DESCRIPTION
WARNING: TO INSURE THE ACCURATE AND RELIABLE
OPERATION OF THIS PRODUCT, IT IS ESSENTIAL TO:
• Properly size each valve based on the individual application
• Properly design the recirculation system to minimize pressure
and temperature variations
• Conduct an weekly maintenance program to insure proper
operation of all critical components
FAILURE TO COMPLY WITH PROPER INSTALLATION
INSTRUCTIONS COULD CONTRIBUTE TO VALVE FAILURE,
RESULTING IN INJURY OR DEATH.
TECHNICAL INSTRUCTIONS
Hydroguard ® ES Series Emergency Tempering Valves
with Dual Internal Cold Water By-Pass
ES200 and ES400
Form TI ES200/ES400 v2
Table 1, Capacity Tables, present the Hydroguard discharge capacity
in gpm and Ipm for various pressure differentials (the difference
between the lowest inlet pressure and the discharge pressure at the
Hydroguard).
SIZING
Operating
Maximum Pressure. . . . . . . . . . . . . . . . . . . . . . 125 psig (861.25 kPa)
Maximum Hot Water Temperature . . . . . . . . . . . . . . . . . 180°F (82°C)
Approach Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15°F (8°C)
Temperature Adjustment Range . . . . . . . . 60°F (15°C) - 95°F (35°C)
Factory Set Temperature . . . . . . . . . . . . . . . . . . . . . . . . 85°F (29°C)
Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Z358.1 1998
Note: Set point cannot be less than the cold water temperature. For best
operation, hot and cold water should be at least 15
° F (9.4 ° C) from desired set
point.
SPECIFICATIONS
Table 1- Capacity Tables
Flow Capacity in US gpm at 50-50 Mixed Ratio
Model Min. Flow Pressure Drop Across Valves in psi
Rate 5 10 20 30 45 60 75
ES200 3.0 gpm 15 20 30 36 45 52 58
ES400 3.0 gpm 27 38 54 66 80 93 104
Flow Capacity in lpm at 50-50 Mixed Ratio
Model Min. Flow Pressure Drop Across Valves in kP A
Rate 34 69 138 207 310 414 517
ES200 11.0 lpm 57 76 113 136 170 197 220
ES400 11.0 lpm 102 144 203 249 305 352 393
By-Pass flows will vary depending on supply conditions and application.
Model ES400
Typical Flow
Hot and cold water supplies enter Hydroguard at indicated ports,
(see Figure 1) then flow past their respective balanced poppet plug
and seats. Next, hot and cold water flow is directed to the mixing
chamber where the thermostatic actuator is located.
Temperature adjustment screw moves the actuator/poppets to
determine the discharge temperature.
With a rise in discharge temperature due to pressure or tempera-
ture fluctuation on the inlet, the actuator expands, decreasing hot
water and increasing cold water flow to maintain the valve set
point. The reverse occurs with a drop in discharge temperature.
• Cold water supply failure – causes actuator to expand allowing
the motor to seat hot water poppet.
• Hot water supply pressure failure – causes actuator to contract
opening cold water bypass ports. Secondary bypass mecha-
nism opens upon failure of actuator or hot water.
OPERATION
ES200
Mixing
Chamber
Body
Balanced Hot
Water Poppet
Hot Water
Primary
By-Pass
Spring
Secondary
By-Pass
Temperature
Adjustment
Screw
Adjustment
Locking
Screw
Thermostatic
Actuator
Cold Water
By-Pass Ports
Cold Water
Balanced Cold
Water Poppet
Motor
Return
Spring
Figure 1