Powers ES200-400 User 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 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.
OPERATION
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
TI ES200/ES400 v2 Page 2
TAG DESCRIPTION
1 Etched Bonnet
2 Adjustment Screw
3 Bonnet Screw
4 Set Screw
5 Bonnet Gasket
6 Motor Housing
7 Housing Bolt
8 Temp Limit Spacer
9 Spacer Set Screw
10 Overload Assy
11 Overload “O” Ring
12 Funnel
13 Thermal Actuator
14 Funnel “O” Ring
TAG DESCRIPTION
15 Motor Adapter
16 Motor Adapter “O” Ring
17 Hot Water Poppet
18 Pressure Relief Spring
19 Pressure Relief Poppet
20 CW Bypass Plug
21 Bypass Spring
22 Cold Water Poppet
23 Return Spring
24 Body “O” Ring
25 Body
26 Body Cap “O” Ring
27 Body Cap
ES200 KIT NUMBER ES400 KIT NUMBER DESCRIPTION CONTAINS ITEMS:
390-573 390-574 Actuator Replacement Kit 5,13,15,16,24
390-575 390-576 Poppet Replacement Kit 15-24,26
390-577 390-578 Gasket and “O” Ring Kit 5,11,14,16,24,26
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
2
1
6
3
4
8
7
5
PARTS LIST
REPAIR KITS
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
Tempering Valve
Hot Water Recirculation
Tempered Water
to Fixtures
Cold Water
Hot Water Return
Hot Water
H
C
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