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Technical Instructions
Document Number 155-758
June 14, 2019
High Pressure Close-Off 2-Way
Valves, 2-1/2 to 6-Inch, Flanged Iron
Body, ANSI Classes 125 & 250
The Flowrite 599 Series High Pressure Close-off, two-way flanged valve bodies, are
designed to work with either pneumatic or electronic actuators with 3/4-inch (20 mm) or
1-1/2-inch (40 mm) stroke. They are available in both ANSI Class 125 and 250 for
normally open or normally closed action.
• Valve flange face-to-face dimensions meet ISA 75.03 standards.
• Universal bonnet for direct-coupled actuators
• Equal percentage flow characteristic
• Stainless steel trim
• ANSI Leakage Class IV
• EPDM O-ring packing
These Flowrite valves are recommended for chilled or hot water; or 50% water-glycol
solutions.
• ANSI 125 and ANSI 250 cast iron body rating.
• Maximum recommended differential pressure for modulating service; 50 psi (345 kPa).
Ordering a Valve
Plus Actuator
Assembly
To order a complete valve plus actuator assembly from the factory, combine the actuator
prefix code with the suffix of the valve assembly product number. Valves can be ordered
using the numbers in Tables 1 and 2.
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Technical Instructions Flowrite™ 599 Series High Pressure Close-Off Two-Way Valves 2-1/2 to 6-inch
Document Number 155-758 Flanged Iron Body, ANSI Classes 125 and 250
June 14, 2019
Page 2 Siemens Industry, Inc.
Table 1. Product Numbers for ANSI 125 Valves.
Table 2. Product Numbers for ANSI 250 Valves.
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Flowrite™ 599 Series High Pressure Close-Off Two-Way Valves 2-1/2 to 6-inch Technical Instructions
Flanged Iron Bodies ANSI Classes 125 and 250 Document Number 155-758
June 14, 2019
Siemens Industry, Inc. Page 3
Valve size 2-1/2 to 6-inch (65 to 150 mm)
Capacity See Tables 5 and 6, and Figure 2
Body style Flanged
Seat style Single seat, metal-to-metal
Action Normally Open (NO)
Normally Closed (NC)
Stem travel (stroke)
2-1/2 and 3-inch 3/4-inch (20 mm)
4, 5, and 6-inch 1-1/2-inch (40 mm)
Valve body rating ANSI Class 125 and 250; see Table 4
Body Cast iron ASTM A126 Class B
Body trim Stainless steel
Stem Stainless steel ASTM A582 Type 303
Packing EPDM O-ring
Controlled medium Water, 50% water-glycol solutions
Medium temperature range 20°F to 250°F (-7°C to 120°C)
Maximum recommended differential
pressure for modulating service 50 psi (345 kPa)
Rangeability >100:1
Close-off pressures See Tables 7 and 8
Close-off ratings According to ANSI/FCI 70-2
Leakage rate Class IV (0.01% of Cv)
Flow characteristic Equal Percentage
Canadian Registration Numbers 0H7645.5
0C0838.9
Mounting location NEMA 1 (interior only)
Flange mounting according to ANSI B16.1 See 155-303P25 (TB 248)
Dimensions See Tables 14, and Figure 7
Face-to-face dimensions ANSI/ISA S75.03
Valve weight See Table 14
Figure 1. Stem Heating Element.
ASZ6.6 The stem heating element
prevents the formation of ice on the stem
when the medium temperature drops
below 32°F (0°C). It is suited for universal
use with valves having a stem or spindle
diameter of 10 or 14 mm.
Operating Voltage 24 Vac/dc ± 20%
Power consumption ≤ 40 VA/30W
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Technical Instructions Flowrite™ 599 Series High Pressure Close-Off Two-Way Valves 2-1/2 to 6-inch
Document Number 155-758 Flanged Iron Body, ANSI Classes 125 and 250
June 14, 2019
Page 4 Siemens Industry, Inc.
Warning/Caution Notations
Personal injury or loss of life may occur if you do not perform
a procedure as specified.
Equipment damage may occur if you do not perform a
procedure as specified.
Packing kit 599-08020
Rebuild/repack kits See Table 3
Stem retainer kit:
2-1/2-inch and 3-inch valves 599-10048
4-inch, 5-inch, and 6-inch valves 599-10049
Table 3. Rebuild/Repack Service Kits.