Watts M1127-32 - Manual

R
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com
01/05
Mustang Series
ONE-WAY FLOW ALTITUDE VALVE
with SOLENOID OVERRIDE
FEATURE
M127-32 or M6127-32 (Globe)
M1127-32 or M61127-32 (Angle)
m127-32 link
Operation
The Watts ACV One Way Flow Altitude Valve with Solenoid Override Feature is designed to open, allowing
flow into a reservoir or elevated storage tank (tank fill), and close drip tight when high water level is achieved.
The Altitude Pilot remotely senses static tank head pressure (water level) through a field installed sensing
line, and directs pressure into and out of the cover chamber of the 3-way Accelerator Pilot. When the cover
of the Accelerator Pilot is pressurized, the main valve cover chamber is vented downstream (dry drain) or
to atmosphere (wet drain), causing the valve to open fully. When the cover of the Accelerator Pilot is de-
pressurized, the main valve cover chamber is connected to upstream pressure, causing the valve to close
drip tight.
As water level decreases, static tank head pressure falls below the adjustable setpoint of the Altitude Pilot,
causing it to pressurize the cover of the Accelerator Pilot, opening the valve. As water level increases, static
tank head exceeds the adjustable setpoint of the Altitude Pilot, causing it to depressurize the cover of the
Accelerator Pilot, closing the valve drip tight. Valve opening and closing speeds are separately adjustable.
The Position Indicator with Air Bleed Petcock allow for visual indication of valve position, and allows easy
venting of air entrapped in the main valve cover chamber.
The Solenoid Override Feature provides remote electrical, or local manual closure of the valve. When
the Solenoid Pilot is energized, it vents the cover of the Accelerator Pilot, causing the main valve to close
regardless of water level. Engaging the Solenoid Manual operator simulates power to the solenoid,
manually closing the main valve. Disengaging the Solenoid Manual operator returns the valve to normal
on-off service.
Specify Tank height and Solenoid voltage PRIOR to ordering.