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ES-A-ACV-LF984GD  2115 

© 2021 Watts

Pump Control Valve with Rate-of-Flow Feature

Full Port Ductile Iron Single Chamber Valve

Features

•  Opens at adjustable rate on pump start-up

•  Closes at adjustable rate on pump shut-off

•  Limit Switch turns pump off when valve closes

•  Throttles to maintain constant Rate-of-Flow

•  Orifice Plate Assembly is remote mounted (field installed)

•  Hydraulic Check Feature prevents flow reversal

•  Solenoid equipped with Manual Operator

•  Rate-of-Flow setpoint is adjustable

1

X

X

Y/FC

2

9

4

7

6

X

X

5

5

CLOSES VALVE

OPENS VALVE

FLOW

3(L)

8

Operation

Standard Components

Options and Accessories

 

{

FC – Flo-Clean Strainer

 

{

L – Dual Limit Switch

Engineering Specification

1 – Main Valve (905GD - Single Chamber)

2 – Model 22 Accelerator Control

3 – Limit Switch

4 – 3-Way Solenoid

5 – Check Valve

6 – Adjustable Opening Speed

7 – Adjustable Closing Speed

8 – Rate-of-Flow Control

9 – Orifice Plate Assembly

Y – Y-Strainer 

X – Isolation Cocks

LEAD FREE

*

The information contained herein is not intended to replace the full 

product installation and safety information available or the experi-

ence of a trained product installer. You are required to thoroughly 

read all installation instructions and product safety information 

before beginning the installation of this product. 

NOTICE

* The wetted surface of this product contacted by consumable water 

contains less than 0.25% of lead by weight.

The Pump Control Valve with Rate-of-Flow Feature is designed to min-

imize 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 pres-

sure causes the valve to modulate towards a closed position, decreas-

ing flow rate. 
The Orifice Plate Assembly should be installed three to five pipe diam-

eters downstream of the Pump Control Valve, and field connected with 

3/8

" minimum copper tubing in accordance with factory piping sche-

matic. 

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 down-

stream pressure is greater than upstream pressure, downstream pres-

sure 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.

Series LF984GD

Содержание AMES LF984GD Series

Страница 1: ...tor in accordance with local codes and ordinances WARNING Need for Periodic Inspection Maintenance This product must be tested periodically in compliance with local codes but at least once per year or...

Страница 2: ...ening 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 cycl...

Страница 3: ...is Ames Automatic Control Valve ACV is a full port single chamber basic valve that incorporates a one piece disc and dia phragm assembly This assembly is the only moving part within the valve allowing...

Страница 4: ...530 1945 Pressure Drop psi 2 3 4 6 8 10 20 30 40 60 80 100 Flow Rate Gallons per minute Water 2 4 10 20 40 60 80 100 200 500 1000 2000 5000 10000 20000 100000 8 6 4 8 1 0 1 2 1 4 1 6 6 2 1 1 2 3 8 1 0...

Страница 5: ...l 9 Stem Washer ASTM A276 304 Stainless Steel 10 Diaphragm Washer ASTM A536 65 45 12 Epoxy Coated Ductile Iron 11 Diaphragm Buna N Nitrile 12 Disc Retainer ASTM A536 65 45 12 Epoxy Coated Ductile Iron...

Страница 6: ...e NPT Port Size NPT Shipping Weights A B C D E F G H I J K L in in mm in mm in mm in mm in mm in mm in mm in mm in mm in mm in in lbs kgs 11 4 71 4 184 51 2 140 3 8 1 4 20 9 11 2 71 4 184 81 2 216 51...

Страница 7: ...he Main Valve open and closed 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 When the co...

Страница 8: ...the valve opens or closes The adjustable collar is normally set to contact the trip arm when the main valve is closed The collar can be positioned on the stem by loosening the set screw to actuate the...

Страница 9: ...stomers Nitrile standard EPDM optional Viton optional Voltage 24VDC 24VAC or 120VAC Enclosure General Purpose NEMA 4 standard Explosion Proof NEMA 6 6P 7 9 optional Action Normally Open or Normally Cl...

Страница 10: ...lve cover This causes the main valve to close until inlet pressure is again greater than outlet Standard Material Brass Housing and Body Stainless Steel Indicating Rod Optional Material Stainless Stee...

Страница 11: ...on In the free flow direction the seat moves out of the flow path to all unrestricted flow Specifications Standard Flow Control Large Flow Control FLOW FLOW CLOSED Fluid Speed Controlled by Needle FLO...

Страница 12: ...ure signal is sensed below the diaphragm An increase in flow rate causes the differential pressure across the orifice plate to increase The Pilot modulates toward a closed position when the differenti...

Страница 13: ...3 Cap Screw 4 Power Chamber 5 O Ring 6 Body 7 Seat 8 Adjusting Screw 9 Pin 10 Adapter 11 O Ring Included in Repair Kit Item Description 12 Spring Guide 13 Nut 14 Belleville Washer 15 Diaphragm Washer...

Страница 14: ...ilot circuit speed controls and pilots The filter element can be accessed for cleaning by removing the clean out cap or may be cleaned by installing an optional blow down ball valve The wetted surface...

Страница 15: ...pilot lines to provide a positive shutoff in any override or maintenance situation for simple trouble shooting This 2 piece full port valve features bottom loaded stems PTFE seats and packing Size Dim...

Страница 16: ...r Size 1 4 3 4 NPT Model LF60 Flo Clean Strainers are used to filter the fluid pass ing through the pilot circuit and provide protection to pilot circuit speed controls and pilots It is installed in t...

Страница 17: ...vel Body Material Stainless Steel Elastomers Buna N standard EPDM optional Viton optional Enclosure NEMA 1 3 4 and 13 General Purpose standard NEMA 1 7 and 9 Explosion Proof optional Electrical Form C...

Страница 18: ...roper re assembly 6 Connect solenoid wiring leads to desired switching device using safe standard electrical practices 7 Wire the limit switch contacts to the proper relay connections using safe stand...

Страница 19: ...art to open the main valve checking that the main valve opens Air is vented through the loosened fitting Tighten the fitting when liquid begins to vent Clockwise for MANUAL Operation Figure 1 3 Way So...

Страница 20: ...g Speed Needle Valve Adjustment The closing speed needle valve regulates fluid pressure into the main valve cover chamber controlling the valve closing speed If valve closing is too slow turn the adju...

Страница 21: ...valve specification sheets for approximate cover capacity A continuous flow of water from the open port indicates a damaged diaphragm or loose disc diaphragm assembly Disassemble valve and replace di...

Страница 22: ...ation valves ensure open Diaphragm is damaged Conduct diaphragm seal test repair and replace if necessary Main valve stem assembly corroded damaged Inspect stem assembly clean replace if necessary Blo...

Страница 23: ...require a lifting eye bolt to be installed in the valve stem accessory threads located on the very top of the valve stem 5 Before removing Stem Nut examine stem threads for mineral build up Remove dep...

Страница 24: ...to ensure even distribution Test the Disc and Diaphragm Assembly for smooth travel by following the Freedom of Movement Test procedure in previous section 11 Test the integrity of the Seat Seal by fol...

Страница 25: ...s not work properly other costs resulting from labor charges delays vandalism negligence fouling caused by foreign material damage from adverse water conditions chemical or any other circumstances ove...

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