Description
■
Capacity
■
HydroGuard
®
Series Tempering Valve
With Internal & External Cold Water Bypass
Technical Instructions
IS-P-ES150-200-400XBY
Powers external bypass emergency tempering valve system consists of Powers ES
Series emergency tempering valve and an independent external cold water bypass.
Under normal operation the valve will thermostatically blend hot and cold water to
deliver tepid water to emergency fi xtures, quickly compensating for temperature
variations due to changes in inlet temperature.
Powers ES Series valves have a dual internal cold water bypass that ensures cold
water fl ow in the event of valve failure or loss of hot water. In many applications,
the internal cold water bypass capacity is adequate to provide proper operation of
the emergency fi xtures.
The external cold water bypass system ensures an adequate supply of cold water
if the primary valve, under a hot water supply loss or other failure mode, lacks the
volume necessary for the proper operation of the emergency fi xture.
Powers external bypass emergency tempering valve system includes a pressure
regulating valve that will open when the outlet pressure decreases to a level that
indicates a lack of water caused by a failure mode.
Specifi cations
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Maximum Operating Pressure . . . . . . . . . . . . . . 125psi (861 kPa)
Maximum Hot Water Temperature . . . . . . . . . . 180°F (82°C)
Approach Temperature . . . . . . . . . . . . . . . . . . . . 15°F (8°C) Above Set Point
Temperature Adjustment Range . . . . . . . . . . . . 60 - 95°F (15 - 35°C)
Factory Set Temperature . . . . . . . . . . . . . . . . . . 85°F (29°C)
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Z 358-1 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 (8°C) from desired set point.
Flow Capacity at 50-50 Mixed Ratio
P r e s s u r e D r o p A c r o s s V a l v e
Model
Min. Flow
5psi
10psi
20psi
30psi
45psi
60psi
Rate*
(34 kPa)
(69 kPa)
(138 kPa)
(207 kPa)
(310 kPa)
(414 kPa)
ES150XBY
1.0 gpm
4.0 gpm
6.0 gpm
9.0 gpm
14.0 gpm
17.0 gpm
20.0 gpm
3.8 lpm
15.2 lpm
22.7 lpm
34.1 lpm
53.0 lpm
64.4 lpm
75.8 lpm
ES200XBY
3.0 gpm
15.0 gpm
20.0 gpm
30.0 gpm
36.0 gpm
45.0 gpm
52.0 gpm
11.0 lpm
57.0 lpm
76.0 lpm
113.0 lpm
136.0 lpm
170.0 lpm
197.0 lpm
ES400XBY
3.0 gpm
27.0 gpm
38.0 gpm
54.0 gpm
66.0 gpm
80.0 gpm
92.0 gpm
11.0 lpm
102.0 lpm
144.0 lpm
203.0 lpm
249.0 lpm
305.0 lpm
352.0 lpm
Advanced Thermal Activation
*Minimum fl ow when emergency bypass valve is installed at or near hot water source with recir-
culating tempered water with a properly sized continuously operating recirculating pump.
Cold Water Bypass Capacity
*
■
ES150XBY . . . . . . . . . . . . . . . . . . . . . . . . . 10.0 gpm (37.8 lpm) @ 30psi (207 kPa)
ES200XBY . . . . . . . . . . . . . . . . . . . . . . . . 36.0 gpm (136.3 lpm) @ 30psi (207 kPa)
ES400XBY . . . . . . . . . . . . . . . . . . . . . . . . 52.0 gpm (196.8 lpm) @ 30psi (207 kPa)
* Flow capacity measured with 60psi (414 kPa) cold water supply pressure.
WARNING: TO ENSURE THE
ACCURATE AND RELIABLE
OPERATION OF THIS PRODUCT, IT IS
ESSENTIAL TO:
• Properly size each valve based on the indi-
vidual application.
• Properly design the recirculation system to
minimize pressure and temperature variations.
• Conduct an annual maintenance program to
ensure proper operation of all critical com-
ponents.
FAILURE TO COMPLY WITH PROPER
INSTALLATION INSTRUCTIONS COULD
CONTRIBUTE TO VALVE FAILURE, RESULTING
IN IN JURY OR DEATH.
!
IS-P-ES150-200-400XBY.indd 1
6/12/08 11:00:44 AM
