Product Overview

Valves
www.usa.siemens.com/hvac
D-204
Valve Size .............................................................................1/2" (15 mm)
Valve Body Style ..................................................................... Flared end
Flow Characteristics
Sequence ................................................................... Equal percentage
Changeover ..................................................................... Quick-opening
Valve Type
Sequence ....................................................................... 2 inlets/1 outlet
Changeover .................................................................... 1 inlet/2 outlets
Valve Action ..............................................................NO/Hot to Common
NC/Cold to Common
Stem Travel ......................................................................13/32" (10 mm)
Valve Body Rating .......................................................... ANSI Class 250
Materials
Valve Body .................................................................................. Bronze
Disc ...........................................................................Styrene Butadiene
Stem ................................................................................Stainless Steel
Packing........................................................................ Dual EPT Rubber
Diaphragm Area ............................................................... 11 in.
2
(71 cm
2
)
Max. Diaphragm Pressure ............................................ 30 psi (210 kPa)
Controlled Medium .................................................Water, glycol solution
Max. Medium Temperature .............................................. 250°F (121°C)
Maximum Inlet Pressure ........................................... 250 psi (1720 kPa)
Max. Differential Pressure Between Hot and Cold Ports
Sequence ..................................................................... 50 psi (350 kPa)
Changeover .................................................................... 10 psi (69 kPa)
Max. Differential Pressure for Modulating Service
Sequence Valve ........................................................... 25 psi (170 kPa)
Ambient Operating Temperature ....................... 35 to 140°F (2 to 60°C)
Dimensions shown in inches (mm).
658 Powertop Specifications
Dimensions and Weights
Accessories & Service Kits
D-219
658 Powertop Product Ordering
Valve Size Valve Type Cv Close-offs Part No.
1/2" (15 mm) Sequence 1.5 50 psi (344 kPa) 658-0050
1/2" (15 mm) Sequence 2.5 50 psi (344 kPa) 658-0051
1/2" (15 mm) Changeover 2.5 10 psi (68 kPa) 658-0052