Powers 597 Series Flowrite II Heavy Duty Balanced Control Valves User Manual
Powers Accessories for water
UTILITY IRON BODY SERIES
DESCRIPTION
The rugged Powers Type SI (single seat iron body) balanced valve is primarily
used for steam and water modulating applications with moderate pressure
drops. The equal percent plug provides excellent control characteristics and is
more tolerant of oversizing than linear or quick-opening plugs. The SI’s
control and close off characteristics are particularly well-suited to commercial
water heaters, boilers, and industrial utility applications. The SI balanced valve
is available with the Powers 46 in.
2
and 100 in.
2
actuators. Actuator selection
depends on valve size and flowing system pressure drop across the valve.
SPECIFICATIONS
VALVE
Body Sizes:
2
1
⁄
2
" – 6"
Body Material:
Cast Iron (per ASTM A126-93 Class B)
End Connections:
125 # Flanged (per ANSI B16.1–1993)
Trim:
Bronze Composition Disc
Packing:
Spring loaded TFE/EPDM packing
Seat Leakage:
ANSI Class IV < 0.01% leakage
Close-off Pressure:
125psi
Cv Range:
56-370
Rangeability:
100:1
Characteristics:
Equal Percent
Maximum Pressure:
200 psi @ Temp. <150°F
Max. Differential Press.:
50 psi for Bronze
Temperature Range:
40° – 281° F
ACTUATOR
Housing Construction:
Die cast aluminum
Diaphragm Construction:
Replaceable molded neoprene
Diaphragm Area:
2
1
⁄
2
" – 5", 46 in.
2
,
6" – 100 in.
2
Maximum
35 psi and 200°F
Pressure and Temp.:
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
" NPT
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
Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Theory of Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Valve Sizing and Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Temperature/Pressure Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Ordering Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
Sizes
Actuators Available
2
1
⁄
2
"
46 in.
2
Diaphragm
3"
46 in.
2
Diaphragm
4"
46 in.
2
Diaphragm
5"
46 in.
2
Diaphragm
6"
100 in.
2
Diaphragm
Normally-closed 597 SI with 46 in.
2
actuator shown
TI 597SI
TECHNICAL INSTRUCTIONS
Iron Body Series 597 SI
UTILITY IRON BODY CONTROL VALVES
®