Siemens
Product Guard
Warranty
Three-way Mixing Valves
1/2 to 1-inch
Powermite
MT Series Globe
Powermite MT Series
Three-way Globe Valve.
Description
The Powermite MT Series Three-way Globe Valves are
designed to work with either a pneumatic or electronic
actuator with a 7/32-inch (5.5 mm) stroke.
Features
• Direct-coupled universal bonnet
• No tools required for installation
• Choice of brass or stainless steel trim
• ANSI Leakage Class IV (0.01% of Cv)
• ANSI Class 250 body
• Available in 3 to 8 psig, 8 to 13 psig or 10 to 15 psig
spring ranges with pneumatic actuation
• Interchangeable pneumatic or electronic actuators
• Orderable as valve only or complete valve/actuator
assembly
Applications
The Powermite MT Series Three-way Globe Valves
are used for mixing of hot or chilled water for convectors,
fan coil units, unit conditioners, radiation, reheat coils,
and similar terminal units requiring water mixing.
Recommendation:
Only use the MT Series Valve Actuators. When using
this valve with a pneumatic actuator, note that MT valve
bodies have the spring in the body, rather than the
actuator. To order the correct valve body, select the
proper spring range.
Alternate spring ranges for pneumatic sequencing are
available as valve and actuator factory assemblies only.
A-141
Valves
Siemens
Product Guard
PLUS 3 Warranty
www.usa.siemens.com/hvac
Three-way Mixing MT Series Valve Specifications
A-142
Valves
Valve Size .............................................................1/2 to 1" (15 to 25 mm)
Body Style ....................................................................................... Globe
Seat Style ...........................................................................Metal to Metal
Action ........................................................................... Three-way Mixing
Valve Body Rating .......................................................... ANSI Class 250
Stem Travel (Stroke) .........................................................7/32" (5.5 mm)
Materials
Body ...................................... Forged Brass C37700 (1/2 and 3/4 inch)
or UNS CA 844 Bronze (1 inch)
Trim .................................................................. Stainless Steel or Brass
Stem ........................................... Stainless Steel ASTM A582 Type 303
Packing ........................................................................... EPDM O-rings
Spring Ranges
Standard .............................................................................. 8 to 13 psig
Optional .......................................................... 3 to 8 psig (21 to 55 kPa)
10 to 15 psig (69 to 103 kPa)
Controlled Medium ................Water, Steam, Glycol Solutions up to 50%
Medium Temperature Range ........................... 35 to 250°F (2 to 120°C)
Max. Recommended Differential
Pressure for Modulating Service
Brass Trim ................................................................... 25 psi (173 kPa)
Stainless Steel Trim ..................................................... 50 psi (345 kPa)
Steam Stainless Steel Trim ......................................... 15 psi (103 kPa)
Rangeability
Cv<1 .............................................................................................. >50:1
Cv>1 ............................................................................................ >100:1
Close-off Ratings ......................................... According to ANSI/FCI 70-2
Leakage Rate ....................................................... Class IV (0.01% of Cv)
Flow Characteristics
A→AB .......................................................... Modied Equal Percentage
B→AB ............................................................................................Linear
Mounting Location ............................................... NEMA 1 (interior only)
Refer back to the Selection Charts at the beginning
of this section to make sure the conguration is valid.
Three-way Mixing MT Series Valve Body Product Ordering
Linear, Brass Trim
Valve Size
in. (mm)
1/2 (15) 0.4 (0.34) 7/32
1/2 (15) 1 (0.85) 7/32
1/2 (15) 1.6 (1.37) 7/32
1/2 (15) 2.5 (2.14) 7/32
1/2 (15) 4 (3.42) 7/32
3/4 (20) 6.3 (5.38) 7/32
1 (25) 10 (8.55) 7/32
1/2 (15)
There are no repair parts for this product. Replace the entire valve body if inoperative.
Cv (Kvs)
Flow Rate
0.63 (0.54) 7/32
Stroke (in.) Part No.
599-02064
599-02065
599-02066
599-02067
599-02068
599-02069
599-02070
599-02071
Three-way Mixing MT Series Valve Body Product Ordering
Linear, Stainless Steel Trim
Valve Size
in. (mm)
1/2 (15) 0.4 (0.34) 7/32
1/2 (15) 1 (0.85) 7/32
1/2 (15) 1.6 (1.37) 7/32
1/2 (15) 2.5 (2.14) 7/32
1/2 (15) 4 (3.42) 7/32
3/4 (20) 6.3 (5.38) 7/32
1 (25) 10 (8.55) 7/32
1/2 (15)
There are no repair parts for this product. Replace the entire valve body if inoperative.
Cv (Kvs)
www.usa.siemens.com/hvac
Flow Rate
0.63 (0.54) 7/32
Stroke (in.) Part No.
599-02072
599-02073
599-02074
599-02075
599-02076
599-02077
599-02078
599-02079
Three-way Mixing MT Series Valve Actuator Product Ordering
Description Part No. Actuator Prex Code
3-8 psi (21-55 kPa) 599-01088 257
8-13 psi (55-90 kPa) 599-01088 258
Pneumatic*
2"
Electro-Mechanical
Electro-Mechanical
* Powermite MT Series valve bodies have the spring in the body, rather than in the pneumatic actuator. There are different valve part
numbers for the different spring ranges.
10-15 psi (69-103 kPa) 599-01088 256
24 V, Floating, Spring Return SSC81.5U 260
24 V, Floating, Non-Spring Return SSC81U 259
24 V, 0-10 V, Spring Return SSC61.5U 262
24 V, 0-10 V, Non-Spring Return SSC61U 261
24 V, Floating, Spring Return SQS85.53U 266
24 V, 0-10 V, Spring Return SQS65.5U 265
24 V, 0-10 V, Non-Spring Return SQS65U 264
A-143
Dimensions and Weights
A
Dimensions
B C
2-15/16"
(74 mm)
2-3/8"
(59 mm)
3-15/16"
(99 mm)
Valve Size
in.
1/2"
(15 mm)
3/4"
(20 mm)
1"
(25 mm)
2-3/4"
(70 mm)
3-1/4"
(83 mm)
3-7/8"
(98 mm)
1-5/16"
(33 mm)
1-5/16"
(33 mm)
1-9/16"
(39 mm)
Valves
Weight
1.5 lb.
(0.7 kg)
2.3 lb.
(1.05 kg)
3.3 lb.
(1.5 kg)
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