Powers 1430 Series HiLo Master Mixing Valve - Manual

The Hydroguard thermostatically blends hot and cold water to deliver mixed water at the
desired temperature, quickly compensating for temperature variations due to changes in
inlet temperature, pressure or flow, and reduces flow upon water supply failure.
The 1430’s delivery temperature will hold to within ±5°F (± 2.7°C) when tested in accor-
dance to ASSE 1017.
Operating
Maximum Pressure Differential . . . . . . . . . . . . . . . 100 psi (689 kPa)
Maximum Static Pressure . . . . . . . . . . . . . . . 125 psig (861.25 kPa)
Maximum Hot Water Temperature . . . . . . . . . . . . . . . . 200°F (93°C)
Minimum Hot Water Temperature . . . . 15°F (8°C) Above Set-Point
Minimum Flow: 1432 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 gpm **
1434 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 gpm **
Temperature Adjustment Range*. . . . . . . 40°F (4°C) - 160°F (71°C)
Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ASSE 1017
Certified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CSA B125
Note: *Low limit cannot be less than the cold water temperature. For best
operation, hot water should be at least 15
° F (8 ° C) above desired set point.
**Minimum flow at which valve will control to ASSE 1017 requirements.
TECHNICAL INSTRUCTIONS
1432/1434 Hydroguard ® Hi/Lo
Master Mixing Valves
DESCRIPTION
SIZING
SPECIFICATIONS
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 varia-
tions.
• Conduct an annual 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.
Table A, Capacity Table, presents the Hydroguard discharge capacity in gpm and I/m for various pressure drops across the valves
(the difference between the lowest inlet pressure and the discharge pressure at the Hydroguard).
1432 Hydroguard Valve
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 motor is located.
Temperature Change
With a rise in discharge temperature due to pressure or temperature fluctuation on
the inlet, the actuator expands, decreasing flow of hot water. The reverse occurs
with a drop in discharge temperature.
Responses
Temperature adjustment screw moves the actuator/poppet to the desired discharge
temperature.
• Cold water supply failure – causes actuator to expand reducing the flow of hot
water.
• Hot water supply pressure failure – causes actuator to contract reducing the flow
of cold water.
Funnel expands or contracts depending on flow rate ensuring maximum heat
transmission to actuator.
OPERATION
Cold Hot
Cold
Water
Poppet
Hot
Water
Poppet
Expandable
Restrictor
Thermostatic
Actuator
Temper T T ature
Adjusting
Screw
Figure 1
Table A Flow Capacity in US gpm at 50-50 Mixed Ratio
Model Min. Min. Flow Pressure Drop Across Valves in psi
Flow Rate* to ASSE 1017 5 10 20 30 45 60 75 100
1432 0.5 gpm 1.5 gpm 13.5 18.0 27.0 32.0 40.0 47.0 52.0 60.0
1434 0.5 gpm 5.0 gpm 32.0 45.0 66.0 80.0 100.0 117.0 132.0 152.0
* Minimum flow when Hydroguard is installed at or near hot water source with recirculated tempered water with continuously operating recirculating pump.
Table B Flow Capacity in lpm at 50-50 Mixed Ratio
Model Min. Min. Flow Pressure Drop Across Valves in kPa
Flow Rate* to ASSE 1017 34 69 138 207 310 414 517 690
1432 1.89 lpm 5.68 lpm 51 68 102 121 151 178 197 227
1434 1.89 lpm 18.92 lpm 121 170 250 302 378 442 500 575
* Minimum flow when Hydroguard is installed at or near hot water source with recirculated tempered water with continuously operating recirculating pump.
TI 1430 HiLo