Powers 596 Series Flowrite II Heavy Duty Control Valves - Type MI Mixing User Manual
Technical instructions
Powers Flowrite II Water Mix (MI) Valves combine hot and
cold water proportionally to satisfy the demands of the con-
trolling instrument.
The valve's linear inherent characteristic produces equal
changes in flow per unit of valve stroke regardless of plug
position. The valve is air operated and can be used in a vari-
ety of mixing applications.
Description
n
Flowrite II
Iron Body Series 596 MI
Technical Instructions
IS-P-596MI
596 MI with 46 in
2
actuator shown
Sizes
Actuators Available
2 1/2"
46 in
2
or 100 in
2
Diaphragm
3"
46 in
2
or 100 in
2
Diaphragm
4"
46 in
2
or 100 in
2
Diaphragm
5"
100 in
2
Diaphragm
6"
100 in
2
Diaphragm
Specifications
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VALVE
Body Sizes: ................................ 2 1/2" – 6"
Body Material: .......................... Cast Iron
(per ASTM A126-93 Class B)
End Connectors: ....................... 125 # Flanged
(per ASNI B16.1-1993)
Trim: ........................................... Bronze
Packing: ..................................... Spring loaded TFE packing
Seat Leakage: ........................... ANSI Class III; <0.1% leakage
Cv Range: .................................. 74-390
Rangeability: ............................. 100:1
Characteristics: ........................ Linear/Mixing
Maximum Pressure: ................ 200 psi @ Temp. <150°F
Max. Differential Press.: ......... 50 psi
Temperature Range: ................ 40 – 281° F
ACTUATOR
Housing Construction: ............. Die cast aluminum
Diaphragm Construction: ........ Replaceable molded neoprene
Diaphragm Area: ...................... 46 in
2
, 100 in
2
Maximum Press. and Temp: .. 35 psi and 200°F
Ambient Shipping Limits: ........ -40 to 220° F
Ambient Operating Limits: ...... -20 to 220° F
Air Connection: ......................... 46 in
2
1/4" NPT
100 in
2
1/8" FNPT
Position Indication: .................. 1/8" increments
Mounting: .................................. In any upright position with
actuator head above 45° of the
center line of the valve body.
Actuator head may be swiveled
to any convenient position.
Table of Contents
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Description ..................................................... 1
Specifications ................................................ 1
Application Information ............................... 2
Theory of Operation ..................................... 2
Valve Sizing and Selection ...................... 3-4
Close Off Data ................................................ 5
Temperature/Pressure Ratings ................. 5
Dimensional Data ......................................... 6
Installation ...................................................... 7
Maintenance ................................................. 7
Ordering Information .................................... 8
FAILURE TO COMPLY WITH PROPER INSTALLATION AND
MAINTENANCE INSTRUCTIONS COULD CONTRIBUTE TO
THE VALVE FAILURE.
Watts Hot Water Master Tempering Valves cannot be used
for tempering water temperature at fixtures. Severe bodily
injury (i.e., scalding or chilling) and/or death may result
depending upon system water pressure changes and/or
supply water temperature changes. ASSE standard 1016,
1069 or 1070 listed devices should be used at fixtures to
prevent possible injury.
The Watts Hot Water Tempering Valves are designed to be
installed at or near the boiler or water heater. They are not
designed to compensate for system pressure fluctuations
and should not be used where ASSE standard 1016, 1069 or
1070 devices are required. These Watts valves should never
be used to provide “anti-scald” or “anti-chill” service.
The components of the system must be of materials with a
construction capable of withstanding the high limit output
temperatures of the water heating source.
Need for Periodic Inspection: Periodic inspection by a
licensed contractor is recommended. Corrosive water
conditions, temperatures over 210°F, and or unauthorized
adjustments or repair could render the valve ineffective
for service intended. Regular checking and cleaning of the
valve’s internal components and check stops helps assure
maximum life and proper product function. Frequency of
cleaning and inspection depends upon local water condi-
tions and water temperature.
WARNING
!
WARNING
!