Watts S1127-1 User Manual

R
ONE-WAY FLOW ALTITUDE VALVE
01/05
Stainless Series
S1127-1 or S61127-1 (Angle)
The Watts ACV One Way Flow Altitude Valve 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 allows for visual indication of valve position, and easy venting of air entrapped in the main valve cover chamber.
Specify Tank height PRIOR to ordering.
S127-1 or M6127-1 (Globe)
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 valves 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
S127-2 / S6127-2 Two Way Flow Altitude Valve S127-8 / S6127-8 One Way Flow Altitude Valve with Pressure Sustaining Feature S127-11 / S6127-11 One Way Flow Altitude Valve with Delayed Opening Feature S127-31 / S6127-31 Two Way Flow Altitude Valve with Solenoid Override Feature
8550 Hansen Road Houston, Texas 77075 (Ph) 713.943.0688 (Fx) 713.944.9445 www.wattsacv.com
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