Powers e430 User Manual

The Series 430 Hydroguard thermostatically blends hot and
cold water to deliver mixed water at the desired temperature,
compensating for temperature, pressure, and flow changes in
the supply lines, and reduces flow upon water supply failure.
The delivery is adjustable between 40°F and 160°F (4-71°C).

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 Supply Temp . .15°F (8°C) Above Set-Point

Temperature Adjustment Ranges* . . . . . . . . .40°-160°F (4°-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.

TECHNICAL INSTRUCTIONS

431/432/433/434 Hydroguard

Master Mixing Valves

A Watts Industries Co.

DESCRIPTION

SIZING

SPECIFICATIONS

Table 1- Flow Capacity in US gpm at 50-50 Mixed Ratio
Model Min Flow Min Flow Pressure Drop Across Valves in psi

Rate* to ASSE 1017 5 10 20 30 45 60 75 100
431 0.5 gpm 4.0 gpm 7.5 11 16 20 25 29 33 38.5
432 0.5 gpm 7.0 gpm 15 20 30 36 45 52 58 67
433 0.5 gpm 10.0 gpm 24 35 51 64 80 93 105 123
434 0.5 gpm 15.0 gpm 40 55 82 101 125 146 165 190

* Minimum flow when Hydroguard is installed at or near hot water source with recirculated tempered water with
continuously operating recirculating pump.

Flow Capacity in lpm at 50-50 Mixed Ratio
Model Min Flow Min Flow Pressure Drop Across Valves in kPA

Rate*

to ASSE 1017 34 69 138 207 310 414 517 689

431 1.89 lpm 15 lpm 28.4 41.6 60.6 76.0 94.6 109.8 125.0 145.7
432 1.89 lpm 26 lpm 56.8 76.0 113.5 136.2 170.3 197.0 219.5 253.5
433 1.89 lpm 38 lpm 1.5 2.2 3.2 4.0 5.0 5.9 6.6 7.8
434 1.89 lpm 57 lpm 2.5 3.5 5.2 6.4 7.9 9.2 10.0 12.

* Minimum flow when Hydroguard is installed at or near hot water source with recirculated tempered water with
continuously operating recirculating pump.

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 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 1, Capacity Tables, present the Hydroguard discharge capacity in GPM and I/m for various pressure differentials (the difference
between the lowest inlet pressure and the discharge pressure at the Hydroguard).

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 knob moves the actuator to determine the
discharge temperature.
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.

• 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
allowing return spring to seat cold water poppet.

OPERATION

Figure 1

Form TI430 v3

OUTLET

TI430 v3 Page 2

NO. NAME FINISH 431 432 433 434

1 Body Cap Rough Bronze 390-334 390-334 390-336 390-336

Polished Chrome 390-335 390-335 390-337 390-337
2 “O” Ring N/A 084-020 084-020 047-132 047-132
3 Return Spring N/A 390-155 390-155 390-162 390-162
4 Nut Use Mixing Valve Repair Kit
5 Cold Water Poppet Use Mixing Valve Repair Kit
6 Cold Water Stem Use Mixing Valve Repair Kit
7 Motor Failure Spring N/A 390-248 390-048 390-201 390-092
8 Lower Body N/A N/A N/A
9 “O” Ring N/A 047-035 047-036 047-040 047-047
10 Hot Water Poppet Use Mixing Valve Repair Kit
11 Overload Assembly N/A N/A N/A
12 Thermal Actuator Use Thermal Actuator Repair Kit
13 “O” Ring N/A 047-022 047-020 047-020 047-020
14 Motor Housing N/A N/A N/A N/A N/A
15 Gasket N/A 390-243 390-051 390-198 390-095
16 Motor Housing Cap Rough Bronze 390-225 390-144 390-178 390-156

Polished Chrome 390-226 390-145 390-179 390-157
17 Adjustment Knob Retainer Rough Bronze 390-254 390-256 390-258 390-256

Polished Chrome 390-255 390-257 390-259 390-257
18 Adjustment Knob Rough Bronze 390-340 390-342 390-342 390-342

Polished Chrome 390-341 390-169 390-169 390-169
19 Set Screw Kit N/A 430-017 430-016 430-016 430-016
20 Screw Rough Bronze 030-068 030-068 030-109 030-061

Polished Chrome 030-068G 030-068G 030-109G 030-061G
21 Set Screw N/A 430-020 390-166A 390-166A 390-166A
22 Bolts Rough Bronze 080-015 080-015 080-015 080-015

Polished Chrome 080-015 080-015 080-015 080-015
23 Funnel 390-006 390-009 390-503 390-506
24 Funnel “O” Ring 800-064 084-041 084-043 084-042
25 “O”Ring 047-002 047-020 084-029 084-014
26 Adapter 390-001 390-010 390-504 390-505

NO. NAME FINISH 431/432 433/434

31 Bonnet* Rough Bronze 230-267 230-287

Polished Chrome 230-268 230-288
32 “O” Ring n/a 047-029 047-130
33 Gasket n/a 230-083 230-083
34 Screen n/a 230-116 230-104
35 “O” Ring n/a 047-009 047-009
36 Stem Rough Bronze 230-269 230-289

Polished Chrome 230-270 230-290
37 Spring n/a 230-127 230-103
38 Poppet Assembly n/a 230-271 230-293

NO. NAME FINISH 431/432 433/434

39 Body Rough Bronze n/a n/a

Polished Chrome n/a n/a

40 Nut Rough Bronze 230-117 230-096

Polished Chrome 230-118** 230-097**

41 Tail Piece Rough Bronze 230-119 230-094

Polished Chrome 230-120** 230-095**

* If Replacing either bonnet or stem on old style checks, you must replace both with new parts.

Do not use the new bonnet with an old stem, or vice versa.

** Available as complete body, nut and tail piece assembly only.

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CHECKSTOP

CHECKSTOP

PARTS LIST

CHECKSTOP SECTION