Watts M1127-2 - Manual (Page 2)

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8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com
01/05
Mustang Series
TWO-WAY FLOW ALTITUDE VALVE
M127-2 or M6127-2 (Globe)
M1127-2 or M61127-2 (Angle)
m127-2 link
Installation Guidelines
• Prior to installation, flush line to remove debris.
• Install valve horizontally “in line” (cover facing UP), so flow arrow matches flow through the line. Avoid
installing valve 6” and larger vertically. Consult factory prior to ordering if installation is other than
described.
• Install inlet and outlet isolation valves. NOTE: When using butterfly valves, insure disc does not contact
control valve. Damage or improper valve seating may occur.
• Provide adequate clearance for valve servicing and maintenance.
• Install pressure gauges to monitor valve inlet, outlet, and static head pressure.
• Provide adequate drain for cover chamber discharge if “wet drain” option is selected. Consult “Valve
Cover Capacity” chart on appropriate main valve Engineering Bulletin.
• Install static tank head sense line. For optimum control, sense line should be: 1) Installed with an
upward angle (towards reservoir) to avoid air accumulation, 2) Connected no further than forty-five pipe
diameters from the reservoir, and 3) A minimum of 1/2” diameter.
Other Watts ACV Altitude Control Valves
M127-1 / M6127-1 One Way Flow Altitude Valve
M127-8 / M6127-8 One Way Flow Altitude Valve with Pressure Sustaining Feature
M127-11 / M6127-11 One Way Flow Altitude Valve with Delayed Opening Feature
M127-31 / M6127-31 Two Way Flow Altitude Valve with Solenoid Override Feature
M127-32 / M6127-32 One Way Flow Altitude Valve with Solenoid Override Feature