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Powermite 599 Series

Technical Instructions

Document No. 155-199P25

VF 599-8

October 24, 2005

MZ Series Zone Control

Three-way Valves

Siemens Industry, Inc.

Description

The Powermite 599 Series ANSI Class 250 MZ Series three-way valves are designed to

work the SSB MZ Series actuator with a 7/32-inch (5.5 mm) stroke.

Features

Direct coupled universal bonnet

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 45 pounds force (200 N).

Product Numbers

Table 1. Product Numbers.

Flow Rate Line Size Product

Cv (Kvs) inch (mm) Number

0.4 (0.34) 1/2 (15) 599-01132

0.63 (0.54) 1/2 (15) 599-01133

1 (0.85) 1/2 (15) 599-01134

1.6 (1.37) 1/2 (15) 599-01135

2.5 (2.15) 1/2 (15) 599-01136

4 (3.44) 1/2 (15) 599-01137

6.3 (5.43) 3/4 (20) 599-01138

10 (8.6) 1 (25) 599-01139

Summary of content (8 pages)

PAGE 1
Technical Instructions Document No. 155-199P25 VF 599-8 October 24, 2005 Powermite 599 Series MZ Series Zone Control Three-way Valves Description The Powermite 599 Series ANSI Class 250 MZ Series three-way valves are designed to work the SSB MZ Series actuator with a 7/32-inch (5.5 mm) stroke. Features Direct coupled universal bonnet ANSI Leakage Class IV (0.
PAGE 2
Technical Instructions Document No. 155-199P25 October 24, 2005 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) 252 (155-307P25) for selection procedure and ordering codes. Valve assemblies can be ordered using the numbers in Table 1.
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Powermite 599 Series MZ Zone Control Three-way Valves Technical Instructions Document No. 155-199P25 October 24, 2005 Table 2. Body Temperature-Pressure Rating. Pressure psig (kPa) Temperature Bronze or Forged Brass Valve Body F° C° ANSI Class 250 -20 to +150 (-30 to 66) 400 (2758) +200 (93) 385 (2655) +250 (121) 365 (2586) +300 (149) 335 (2300) +350 (177) 300 (2068) Table 3. Maximum Water Capacity - U.S. Gallons per Minute. Valve Size in Cv\1 inches Pressure Differential - psi 2 3
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Technical Instructions Document No. 155-199P25 October 24, 2005 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. Table 5. Close-off Pressures. Action NC Upper port NO Bottom port Page 4 Valve Size Inches (mm) SSB Actuator psi (kPa) 1/2", 0.4< Cv <1.6 (15 mm, 0.34< Kvs <1.37) 70 (483) 1/2", 2.5< Cv <4 (15 mm, 2.15< Kvs <3.
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Powermite 599 Series MZ Zone Control Three-way Valves Technical Instructions Document No. 155-199P25 October 24, 2005 Figure 2. Close-off Pressures. Operation As the valve stem moves downward, the flow through the NO port decreases and the flow through the NC port increases. As the valve stem moves upward, the flow through the NO port increases and the flow through the NC port decreases. In the event of power failure, a fail-safe actuator returns the valve to its normal position.
PAGE 6
Technical Instructions Document No. 155-199P25 October 24, 2005 Sizing, Continued • The maximum capacity the valve must deliver. • The maximum line pressure differential the valve actuator must close against. See Application Bulletin (AB)-1 Control Valve Selection and Sizing (155-285) for further recommendations. See Tables 3 and 4 for valve capacities. Mounting and Installation Install the valve so that the flow follows the direction of the arrow indicated on the valve body.
PAGE 7
Powermite 599 Series MZ Zone Control Three-way Valves Technical Instructions Document No. 155-199P25 October 24, 2005 Figure 5. Table 7. Dimensions of the Actuator and Recommended Service Envelope. Dimensions in Inches (Millimeters). Actuator Actuator Prefix Code SSB 254 255 Siemens Industry, Inc.
PAGE 8
Technical Instructions Document No. 155-199P25 October 24, 2005 Parts Of The Valve Table 8. Three-way Bronze/Forged Brass Valves. Item Part Name Part No. Q’ty Material — 1 Bonnet Ass’y — 1 2 Spring — 1 Stainless steel 3 Wiper — 1 Nylon 4 Valve Body — 1 Bronze or Forged Brass 5 Stem and Plug Assembly — 1 Stainless steel or brass 6 Upper guide disc — 1 Brass 7 Retaining ring — 1 Stainless steel Information in this publication is based on current specifications.