Standard Components
Operation
The ACV Non-Surge Check Valve is designed to control pipeline
surges caused by flow reversal by slowly opening and closing at
separate adjustable rates. The valve opens when upstream pressure
is greater than downstream pressure. When upstream pressure is
greater than downstream pressure, the Adjustable Opening Speed
Control allows fluid out of the main valve cover chamber, providing
a controlled rate of opening. When a pressure reversal occurs and
downstream pressure becomes higher than upstream pressure, the
two Adjustable Closing Speed Controls allows the higher down-
stream pressure to enter the main valve cover chamber, providing a
controlled rate of closure.
NOTE: A maximum pipeline velocity of six feet-per-second is recom-
mended when installing this type of check valve. When pipeline
velocities exceed six FPS, consideration should be given to adding an
ACV Model 116 Pressure Relief Valve or Model 116-52 Combination
Surge Anticipator and Pressure Relief Valve to the system.
1
X
X
X
Y/FC
2
2
2
4
4
3
P/L
X
CLOSES VALVE
OPENS VALVE
FLOW
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.
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 horizon-
tal in-line installation, 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 order-
ing 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 damage. 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.
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 - Main Valve (M100 – Single Chamber)
2 - Check Valve
3 - Adjustable Opening Speed
4 - Adjustable Closing Speed
Installation
LFM118-4 (Globe) Non Surge Check Valve (6" and Larger)
2 IOM-ACV-118-4_6118-4 2115
EDP#1917121
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