Warren Controls AmurAct Linkage LS Series, Инструкции по установке, эксплуатации и обслуживанию

Страница: 3 / 24

AmurAct AMURACT_IOM_RevK_0415
3
LEVER
STEM
CONNECTOR
VALVE
STEM
LINKAGE
LOCKNUT
REAR SAFETY
SHIELD
LINK
INPUT
SHAFT
CRANK
BENCHMARK
LINKAGE
BASE
AmurAct Linkage
(front Safety Shield Removed)
Refer to page 2 and below for identification and location of
components and parts.
Four AmurAct MOTORS are available: the F3 and F5 produce 120
pound-inches (lb-in) of torque and the F4 and F6 produce 240 pound-
inches (lb-in). The motors are similar in apperance. A MOTOR is
selected according to the valve type and size, the differential pressure
against which the valve must operate, and the power source that is
available. Consult Product Specifications for additional information
on motor selection.
Each motor contains an internal Enerdrive ® energy source to run
the motor to a fail-safe valve position if operating power is lost. An
advanced AutoStroke feature apportions the control signal over the
actual range of valve movement for increased accuracy; and provides
“soft stops” at both ends of travel to extend operating life. See page 5
for location of the Reset/Autostroke pushbutton.
The MOTOR applies rotary motion and rotational force to the INPUT
SHAFT of the AmurAct LINKAGE by means of the SHAFT CLAMP. The
CRANK is welded to the INPUT SHAFT and rotates with it. Clockwise
CRANK rotation is translated by the LINK and causes the LEVER to
rotate counterclockwise (upward) about the fixed pivot at its left end
(as shown below).
A STEM CONNECTOR is threaded onto the valve stem and attached to
the LEVER by two connecting links. Upward movement of the LEVER
draws the VALVE STEM upward. The articulated link connection
reduces side loading on the valve stem packing. Raising the stem of a
two-way valve opens it. Raising the stem of a three-way valve opens
the lower (L) port and shuts the upper (U) port. When the MOTOR
reverses direction, the lever is drawn downward and the valve stem is
pushed downward, reversing the control valve action.
When the AmurAct linkage has been calibrated, the BENCHMARK
indicates the position of the CRANK when the valve plug makes
contact with the valve seat. Further counterclockwise rotation of the
CRANK exerts seating force onto the valve plug to produce very tight
closure. On a two-way valve with ¾” stem travel, motion stops when
the CRANK and LINK are aligned with each other, perpendicular
to the LEVER. This is the lockup position, and is maintained by the
AmurAct linkage without sustained MOTOR torque.
Factory default settings call for an increasing 2-10 volt or 4-20 mAdc
signal to open the control valve. Therefore, loss or interruption of the
control signal will cause the two-way valve to shut, or the lower (L)
port of a three-way valve to shut. Similarly, loss of operating power
will activate the Enerdrive fail-safe system to drive the AmurAct
linkage to the fail-safe position. Upon restoration of operating power,
AmurAct returns to normal operation after the Enerdrive fail-safe
energy source is fully recharged, typically 60 seconds or less ... with
no operator action required.
STEM CONNECTOR
SHOULDER
SCREW
STEM
JAM NUTS
THEORY OF OPERATION