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LFM127-32 (Globe) One-Way Flow Altitude Control Valve with
Solenoid (On-Off) Override Feature
Standard Components
1 – Main Valve (M100 – Single Chamber)
2 – Model 22-1 Accelerator Control
3 – Altitude Control
4 – Check Valve
5 – Adjustable Opening Speed
6 – Adjustable Closing Speed
7 – 3-Way Solenoid
8 – 3-Way Ball Valve
P – Position Indicator
X – Isolation Cocks
Operation
The One-Way Flow Altitude Automatic Control Valve (ACV) 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 cham-
ber 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.
Installation
Start-up of an automatic control valve requires that proper procedures be followed. Time must be allowed for the valve to react to adjustments
and the system to stabilize. The objective is to bring the valve into service in a controlled manner to protect the system from damaging over-
pressure.
1.
Prior to installation, flush line to remove debris.
2.
Install valve so the flow arrow matches flow through the line, and gauges to monitor valve inlet and outlet pressures. A Position Indicator
can be installed to provide visual indication of valve position and operation without disassembly.
3.
Install isolation valves upstream and downstream of the main valve.
Note: If using butterfly valves, ensure valve disc does not contact the main valve.
4.
Provide adequate clearance for valve servicing and maintenance. Refer to valve servicing dimensions on next page. Avoid installing valves
6" and larger in the vertical position (main valve stem horizontal). Automatic Control Valves (ACVs) are designed for horizontal in-line instal-
lation, with the cover facing up (main valve stem vertical). Slow operation or premature stem and guide wear may occur if valve is not
installed according to factory recommendations. Consult factory for detailed engineering review prior to ordering if valve is to be installed
other than horizontally in-line.
5.
If valve is equipped with a pilot control system, extra precautions should be made during installation to protect the piping circuit from dam-
age. Only remove the pilot control system from the valve if necessary. Tubing and fittings should be kept clean and replaced exactly as
removed. Consult appropriate hydraulic schematic to ensure proper re-assembly.
6.
Check to confirm that the sense line is installed and connected.
7.
Connect solenoid wiring leads to desired switching device, using safe, standard electrical practices.
8.
After installation, vent entrapped air from valve cover and pilot system by following instructions on Technical Bulletin.
2
IOM-ACV-127-32_6127-32 2115
3
(Tank Sense Line)
7
EDP# 1917061
P(L)
X
6
2
4
X
Y/FC
5
FLOW
CLOSES VALVE
OPENS VALVE
X
1
8
© 2021 Watts
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