Elkhart Brass 2900G Series - Manual (Page 4)

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I. SYSTEM DESCRIPTION:
The 2900G series gear actuated valve line includes ball valves in 1.5”, 2.0”, 2.5”, 3” and
4” sizes, also butterfly valves in 2”, 4”, 5”, and 6” sizes. A segmental gear made of
aluminum bronze and a worm made of a stainless steel alloy controls the valve opening
and closing. This actuator design allows easy and precise control of large flows, and
provides compliance with the opening and closing time requirements of NFPA 1901.
The hand wheel assembly is designed for remote operation of gear-actuated valves. Two
universal joints, which are provided, and an optional connecting rod (supplied by others)
are used to couple the valve and handwheel together for remote operation. The
handwheel assembly allows rotational alignment of the handwheel relative to the shaft.
This allows the end user to line up the spinners of adjacent handwheels when the valves
are closed. See Figure 6 for a layout drawing of the complete valve system.
An optional indicator light module (81383001) provides an indication of valve status by
means of three high intensity LED’s with a large viewing angle that can be seen even in
bright sunlight. The module is sealed from the environment according to the
specifications for a NEMA 4 enclosure for reliable service. The electrical components
used in the system are interconnected with a harness utilizing environmentally sealed
connectors. This intermediate harness is available from Elkhart Brass in several standard
lengths. See Figure 5 for part numbers and information.
II. OPTIONAL VALVE STATUS INDICATOR (81383001):
The 81383001 valve status indicator includes three high intensity LED’s (Red, Amber,
and Green) for reliable status indication under all ambient lighting conditions. These
LED’s provide the following signals to the operator:
SIGNAL MEANING
Red Valve is in the fully closed position
Green Valve is in the fully open position
Amber Valve is in a throttled position
A. Reverse Polarity Protection:
If polarity is reversed at time of system installation or at any time during maintenance or
troubleshooting, no damage will result. The LED’s will not light when polarity to the
module is reversed.
B. Electrical Specifications:
Normal operating voltage 12 VDC
Operating voltage range 11 VDC – 20VDC
Operating temperature range -40°F to 150°F