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ManualsBrandsSiemens ManualsShort Stroke (BC3)599 Series Zone Valve Bodies: Two-Way and Three-Way Technical Instructions
123456
Technical Instructions 599 Series Zone Valve 2-way, 3-way Thermic Actuators
Document Number 155-780
May 19, 2017
Page 4 Siemens Industry, Inc.
Opening and Closing
Times
Figure 3. Opening and Closing Times.
Mounting and
Installation Notes
When the STA73U or STP73U Actuators are supplied separately from the valve, they
can be assembled with just a few steps:
1. Remove the black actuator support ring (AL50) from the top of the valve. Discard
the ring; it is no longer needed.
2. Thread the black bayonet nut on the valve and manually tighten by hand as tightly
as possible.
Do not use pipe wrenches, pliers, or other similar tools to tighten the bayonet
nut or bayonet ring of the actuator. Hand-tighten only.
3. Place the actuator in position on the valve and bayonet nut, and manually tighten
the bayonet ring on the actuator until it clicks twice.
4. Connect to operating voltage only after mounting.
Steps for dismounting:
WARNING:
Disconnect the power supply before proceeding.