Product Overview

www.usa.siemens.com/hvac

Valves

D-203

658 Powertop Sequence Valve.

Applications

The 658 Powertop Sequence and Changeover Valves are

used for the selection and modulating of hot or chilled wa-

ter through radiant panels connected to separate hot water

and chilled water (4-pipe) systems.

Description

Designed to select and modulate the ow of either hot

or chilled water, without mixing, for radiant panel and

similar applications, the 658 Powertop Sequence and

Changeover Valves are designed with 2 inlets and one

outlet for the sequence valve and with one inlet and 2

outlets in the changeover valve.

Features

• Stainless steel stem for smooth operation and

rugged durability

• Large diaphragm area for control accuracy and

tight close-off

• Removable actuator for ease of servicing

• Durable actuator made to eliminate electrolytic action

• Replaceable disc assemblies

• Matched sequencing or control and changeover

Control Schedule

Powertop

658 Series Globe

Sequence and Changeover Valves

PAGE 1
Powertop 658 Series Globe Sequence and Changeover Valves 658 Powertop Sequence Valve. Applications Designed to select and modulate the flow of either hot or chilled water, without mixing, for radiant panel and similar applications, the 658 Powertop Sequence and Changeover Valves are designed with 2 inlets and one outlet for the sequence valve and with one inlet and 2 outlets in the changeover valve.
PAGE 2
658 Powertop Specifications Valve Size ..............................................................................1/2" (15 mm) Valve Body Style . .................................................................... Flared end Flow Characteristics Sequence.................................................................... Equal percentage Changeover...................................................................... Quick-opening Valve Type Sequence......................................................