Watts M1113-41 User Manual

PUMP CONTROL VALVE with RATE-OF-FLOW FEATURE

01/05

Mustang Series

M1113-41 or M61113-41 (Angle)

Operation

The Watts ACV Pump Control Valve with Rate-of-Flow Feature is designed to minimize the surges associated with the starting and stopping of pumps. The valve slowly opens and closes as required to control pumping related surges, and throttles to maintain a maximum ﬂow rate during the pumping cycle. The pump starts and stops against a closed valve.

Pump Start Up: When the pump is signaled to start, the 3-Way Solenoid is energized, directing pressure into the cover chamber of the 3-way Accelerator Pilot. The Accelerator Pilot allows the main valve cover chamber to be vented downstream, causing the valve to open at a controlled rate, gradually admitting pumping pressure into the distribution system. The rate of opening is controlled by the adjustable opening speed control, which restricts the speed of ﬂuid and pressure evacuating the main valve cover chamber. The valve remains open during the pumping cycle.

Rate-of-Flow Feature: During the pumping cycle, the valve acts as a Rate-of-Flow Control Valve. Throttling (Flow Control) action is controlled by a normally open, differential control pilot designed to: 1) Open (allowing ﬂuid out of the main valve cover chamber) when the differential pressure across the oriﬁce plate is below the adjustable set point, and, 2) Close (allowing ﬂuid to ﬁll the main valve cover chamber through the integral oriﬁce of the Accelerator Pilot) when the differential pressure across the oriﬁce plate is above the adjustable set point. A decrease in differential pressure causes the valve to modulate towards an open position, increasing ﬂow rate. An increase in differential pressure causes the valve to modulate towards a closed position, decreasing ﬂow rate.

M113-41 or M6113-41 (Globe)

The Oriﬁce Plate Assembly should be installed three to ﬁve pipe diameters downstream of the Pump Control Valve, and ﬁeld connected with 3/8” minimum copper tubing in accordance with factory piping schematic. Please specify desired ﬂow rate prior to ordering.

Pump Shutdown: When the pump is signaled to turn off, the 3-Way Solenoid is de-energized, venting the cover chamber of the 3-way Accelerator Pilot. The Accelerator Pilot allows the main valve cover chamber to be connected to upstream pressure, causing the valve to close at a controlled rate. The valve slowly begins to close while the pump continues to operate. The closing rate of the valve is controlled by the adjustable closing speed control, which restricts the speed of ﬂuid and pressure entering the main valve cover chamber. When the valve reaches the closed position, the limit switch is actuated, turning the pump off.

Hydraulic Check Feature: When the pump is turned off and downstream pressure is greater than upstream pressure, downstream pressure is admitted to the main valve cover chamber through a check valve in the pilot control system, closing the valve, preventing reversal of ﬂow.

Manual Operation: Engaging the Solenoid Manual operator simulates power to the solenoid, manually opening the main valve. Disengaging the Solenoid Manual operator returns the valve to the closed position.

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com

PUMP CONTROL VALVE with RATE-OF-FLOW FEATURE

01/05

Mustang Series

M1113-41 or M61113-41 (Angle)

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 and outlet pressure.

• Install Oriﬁce Plate Assembly (provided) 3 to 5 pipe diameters downstream of the valve with the sensing

connections offset from top of pipeline to avoid air accumulation. The Oriﬁce Plate Assembly should not be installed next to a butterﬂy valve.

• Connect Oriﬁce Plate Assembly to Rate-of-Flow Pilot using 3/8” diameter minimum copper tubing (ﬁeld installed) in accordance with factory piping schematic.

• Connect Solenoid and Limit Switch to appropriate pump control panel locations and power source in compliance with local electrical codes.

M113-41 or M6113-41 (Globe)

Other Watts ACV Pump Control Valves

M113-21 / M6113-21 Pump Control Valve M113-19 / M6113-19 Pump Control Valve with Backpressure Feature M113-29 / M6113-29 Pump Control Valve with Pressure Reducing Feature M513-5 / M6513-5 Pump Control Valve M513-AK / M6513-AK Pump Control Valve with High Capacity Pilot System M513-6 / M6513-6 Deep Well Pump Control Valve M513-14 / M6513-14 Deep Well Pump Control Valve with Pressure Relief Feature

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.wattsacv.com