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Table Of Contents

Powermite 599 Series

Technical Instructions

Document No. 155-197P25

VF 599-6

October 27, 2015

MT Series Terminal Unit

Three-way Valves

Siemens Industry, Inc.

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. See

Technical Bulletin (TB) 251, (155-306P25) for selection procedure and ordering

codes.

Valve assemblies can be ordered using the numbers in Table 1.

Product Numbers

Table 1. Product Numbers.

Flow Rate Valve size Product Number

Cv (Kvs) Inch (mm) Brass Trim Stainless Steel Trim

0.4

(0.34) 1/2 (15) 599-02064 599-02072

0.63 (0.54)

1/2

(15) 599-02065 599-02073

1.0 (0.85)

1/2

(15) 599-02066 599-02074

1.6 (1.37)

1/2

(15) 599-02067 599-02075

2.5 (2.15)

1/2

(15) 599-02068 599-02076

4.0 (3.44)

1/2

(15) 599-02069 599-02077

6.3 (5.43) 3/4 (20) 599-02070 599-02078

10 (8.6) 1 (25) 599-02071 599-02079

Description

The Powermite Series ANSI Class 250 MT Series three-way valves are

designed to work with any MT Series pneumatic or electronic actuator with a

7/32 inch (5.5 mm) stroke.

Features

• Direct coupled universal bonnet

• Choice of brass or stainless steel trim

• ANSI Leakage Class IV (0.01% of Cv)

Application

A typical application for the Powermite three-way valve is the mixing of hot or

chilled water for convectors, fan coil units, unit conditioners, radiation, reheat

coils, and similar terminal units requiring an actuator that delivers a minimum of

67 pounds force (300N).

Summary of content (10 pages)

PAGE 1
Technical Instructions Document No. 155-197P25 VF 599-6 October 27, 2015 Powermite 599 Series MT Series Terminal Unit Three-way Valves Description Features The Powermite Series ANSI Class 250 MT Series three-way valves are designed to work with any MT Series pneumatic or electronic actuator with a 7/32 inch (5.5 mm) stroke. • Direct coupled universal bonnet • Choice of brass or stainless steel trim • ANSI Leakage Class IV (0.
PAGE 2
Technical Instructions Document Number 155-197P25 October 27, 2015 Specifications Powermite 599 Series MT Terminal Unit 3-Way Valves Valve size Capacity Body style Seat style Action Valve body rating Stem travel (Stroke) 1/2 inch to 1 inch (15 to 25 mm) See Tables 3 and 4 and Figure 1 Globe Metal-to-metal 3-way mixing ANSI Class 250; See Table 2 7/32-inch (5.
PAGE 3
Powermite 599 Series MT Terminal Unit 3-way Valves Technical Instructions Document Number 155-197P25 October 27, 2015 Table 3. Maximum Water Capacity - U.S. Gallons per Minute. Valve Size Cv\1 inches Pressure Differential - psi 2 3 4 5 6 8 10 15 20 25 30 40 50 60 75 0.6 0.7 0.8 0.9 1.0 1.1 1.3 1.5 1.8 2.0 2.2 2.5 2.8 3.1 3.5 0.63 0.9 1.1 1.3 1.4 1.5 1.8 2.0 2.4 2.8 3.2 3.5 4.0 4.5 4.9 5.5 1.0 1.4 1.7 2.0 2.2 2.5 2.8 3.2 3.9 4.5 5.0 5.5 6.3 7.1 7.
PAGE 4
Technical Instructions Document Number 155-197P25 October 27, 2015 Powermite 599 Series MT Terminal Unit 3-Way Valves Figure 1. Water Capacity Graph. Selection Example Select a valve given: See Figure 1.  Required flow = 20 gpm. Desired pressure drop = 5 psi. Choose a 1-inch (25-mm) valve, Cv 10. Page 4 Siemens Industry, Inc.
PAGE 5
Powermite 599 Series MT Terminal Unit 3-way Valves Technical Instructions Document Number 155-197P25 October 27, 2015 Figure 2. Close-off Pressures. Table 5. Close-off Pressures for Electronic Actuators. Action 3-Way Valve Size Inches (mm) SAS psi (kPa) SSC psi (kPa) 95 (655) 95 (655) NC Upper Port 1/2 0.4< Cv <1.6 (15) (0.34< Kvs <1.37) 1/2 2.5< Cv <4 (15) (2.15< Kvs <3.44) 3/4 (20) 1 (25) 50 (345) 50 (345) 40 (276) 40 (276) 1 (25) 1/2 0.4< Cv <1.6 (15) (0.34< Kvs <1.37) 1/2 2.
PAGE 6
Technical Instructions Document Number 155-197P25 October 27, 2015 Powermite 599 Series MT Terminal Unit 3-Way Valves Table 6. Maximum Available Close-off Pressures for Pneumatic Actuators. Action 3-Way Valve Size Inches (mm) 1/2 0.4< Cv <1.6 (15) (0.34< Kvs <1.37) NC Upper Port 1/2 2.5< Cv <4 (15) (2.15< Kvs <3.44) 3/4 (20) 1 (25) 2-inch Actuator 0 psi (0 kPa) (with 8 to 13 psi Valve) 95 (655) 50 (345) 40 (276) 15 psi (103 kPa) (with 8 to 13 psi Valve) 1/2 0.4< Cv <1.6 (15) (0.34< Kvs <1.
PAGE 7
Powermite 599 Series MT Terminal Unit 3-way Valves Sizing Technical Instructions Document Number 155-197P25 October 27, 2015 The sizing of a valve is important for correct system operation. An undersized valve will not have sufficient capacity at maximum load. An oversized valve can initiate cycling, and the seat and throttling plug can be damaged because of the restricted opening. Correct sizing of the control valve for actual expected conditions is considered essential for good control.
PAGE 8
Technical Instructions Document Number 155-197P25 October 27, 2015 Dimensions Powermite 599 Series MT Terminal Unit 3-Way Valves See Table 7 for valve body dimensions. The letters in Figure 5 refer to the valve centerline to top of actuator, width of the actuator, and service envelope dimensions in Table 8. Figure 4. 3-Way Valve Body. Table 7. 3-Way Valve Dimensions. Page 8 Valve Size Inches (mm) A B C Weight Pounds (kg) 1/2 (15) 2-3/4 (70) 2-15/16 (74) 1-5/16 (33) 1.10 (0.
PAGE 9
Powermite 599 Series MT Terminal Unit 3-way Valves Technical Instructions Document Number 155-197P25 October 27, 2015 Table 8. Dimensions of the Actuators and Recommended Service Envelope. Dimensions in Inches (Millimeters). Figure 5. Siemens Industry, Inc.
PAGE 10
Technical Instructions Document Number 155-197P25 October 27, 2015 Powermite 599 Series MT Terminal Unit 3-Way Valves Parts of the Valve Table 9. 3-Way Bronze/Forged Brass Valves. Item Part Name Part No.