TECHNICAL INSTRUCTIONS
Hydroguard® ES Series Emergency Tempering Valves
with Dual Internal Cold Water By-Pass
ES200 and ES400
Form TI ES200/ES400 v2
DESCRIPTION
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
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.
SIZING
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).
Table 1- Capacity Tables
Flow Capacity in US gpm at 50-50 Mixed Ratio
Model |
Min. Flow |
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Pressure Drop Across Valves in psi |
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Rate |
5 |
10 |
20 |
30 |
45 |
60 |
75 |
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ES200 |
3.0 gpm |
15 |
20 |
30 |
36 |
45 |
52 |
58 |
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ES400 |
3.0 gpm |
27 |
38 |
54 |
66 |
80 |
93 |
104 |
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Flow Capacity in lpm at 50-50 Mixed Ratio |
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Model |
Min. Flow |
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Pressure Drop Across Valves |
in kPA |
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Rate |
34 |
69 |
138 |
207 |
310 |
414 |
517 |
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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.
SPECIFICATIONS
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.
Model ES400
OPERATION
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 temperature 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 mechanism opens upon failure of actuator or hot water.
Figure 1 |
Adjustment |
Temperature |
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Adjustment |
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Locking |
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Screw |
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Screw |
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Thermostatic |
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Actuator |
Balanced Hot |
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Mixing |
Water Poppet |
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Chamber |
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Body |
Secondary |
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By-Pass |
Cold Water |
Hot Water |
Primary |
Cold Water |
By-Pass |
By-Pass Ports |
Spring |
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Motor
Return
Spring
Balanced Cold
Water Poppet
TI ES200/ES400 v2 Page 2
PARTS LIST
TAG |
DESCRIPTION |
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TAG |
DESCRIPTION |
1 |
Etched Bonnet |
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15 |
Motor Adapter |
2 |
Adjustment Screw |
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16 |
Motor Adapter “O” Ring |
3 |
Bonnet Screw |
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17 |
Hot Water Poppet |
4 |
Set Screw |
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18 |
Pressure Relief Spring |
5 |
Bonnet Gasket |
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19 |
Pressure Relief Poppet |
6 |
Motor Housing |
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20 |
CW Bypass Plug |
7 |
Housing Bolt |
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21 |
Bypass Spring |
8 |
Temp Limit Spacer |
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22 |
Cold Water Poppet |
9 |
Spacer Set Screw |
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23 |
Return Spring |
10 |
Overload Assy |
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24 |
Body “O” Ring |
11 |
Overload “O” Ring |
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25 |
Body |
12 |
Funnel |
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26 |
Body Cap “O” Ring |
13 |
Thermal Actuator |
27 |
Body Cap |
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14 |
Funnel “O” Ring |
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27 26
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20 |
19 |
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18 |
13 |
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10 |
7 |
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12 |
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6 |
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23 |
21 |
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11 |
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22 |
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5 |
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24 |
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25 |
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1 |
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3 |
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17 |
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16 |
15 |
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14 |
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8 |
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9 |
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4 |
2 |
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REPAIR KITS |
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ES200 KIT NUMBER |
ES400 KIT NUMBER |
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DESCRIPTION |
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CONTAINS ITEMS: |
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390-573 |
390-574 |
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Actuator Replacement Kit |
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5,13,15,16,24 |
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390-575 |
390-576 |
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Poppet Replacement Kit |
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15-24,26 |
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390-577 |
390-578 |
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Gasket and “O” Ring Kit |
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5,11,14,16,24,26 |
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RECIRCULATION
The mixing valve should be mounted as close as possible to the fixture(s) that it serves.
If the valve is some distance from the hot water source, recirculation may be required to keep the hot water supply within specified limits.
CAUTION: Use care in installing the cold water line such that it does not pass through areas with high ambient temperatures or become exposed to direct sunlight.
Powers ES Series |
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Tempering Valve |
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Hot Water Recirculation |
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Tempered Water |
H |
C |
to Fixtures |
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Hot Water
Hot Water Return
Cold Water
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