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ES-A-ACV-LF985GD  2115 

© 2021 Watts

Deep Well Pump Control Valve

Full Port Ductile Iron Dual Chamber Valve
Features

•  Installed on branch of tee off main pumping header
•  Normally open construction
•  Discharges to atmosphere on pump start-up
•  Closes slowly diverting pressure into system during pumping 

cycle

•  Opens slowly on pump shut-off
•  Limit Switch turns pump off when valve is fully open
•  Adjustable Opening and Closing Speed
•  Solenoid equipped with Manual Operator

1

3

4

2(L)

CLOSES VALVE

OPENS VALVE

FLOW

5

X

X

X/Y

(Supply Pressure)

Engineering Specification

Standard Components

Options and Accessories

 

{

L – Dual Limit Switch

1 – Main Valve (900GD - Dual Chamber)
2 – Limit Switch 
3 – 4-Way Solenoid 
4 – Adjustable Opening Speed
5 – Adjustable Closing Speed
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.

Operation

The Deep Well Pump Control Valve is designed to minimize the 

surges associated with the starting and stopping of well pumps. 

The valve slowly opens and closes as required to control pumping 

related surges. The pump starts and stops against an open valve.

Pump start up:

 When the pump is signaled to start, the 4-Way 

Solenoid is energized and directs fluid and pressure into the cover 

chamber (above the diaphragm), and relieves fluid and pressure 

from the power chamber (below the diaphragm). The fluid and 

pressure relieved from the cover chamber is vented to atmo-

sphere or available floor drain. The valve closes at an adjustable 

rate, gradually admitting pumping pressure into the distribution 

system. Rate of valve closure is controlled by the adjustable clos-

ing speed control, which restricts the speed at which fluid and 

pressure evacuate the power chamber. The valve remains closed 

during the pumping cycle.

Pump shutdown:

 When the pump is signaled to shut-off, the 

4-Way Solenoid is de-energized, and directs fluid and pressure 

into the power chamber (below the diaphragm), and relieves fluid 

and pressure from the cover chamber (above the diaphragm). The 

fluid and pressure relieved from the cover chamber is vented to 

atmosphere or available floor drain. The valve opens at an adjust-

able rate, gradually reducing pumping pressure, allowing the 

system check valve to slowly close. Rate of valve opening is con-

trolled by the adjustable opening speed control, which restricts 

the speed at which fluid and pressure evacuate the cover cham-

ber. When the valve reaches the full open position, the limit switch 

is actuated, turning the pump off.

Manual Operation:

 Engaging the Solenoid Manual operator 

simulates power to the solenoid, manually closing the main valve. 

Disengaging the Solenoid Manual operator returns the valve to 

the open position.

Series LF985GD

Summary of Contents for AMES LF985GD Series

Page 1: ...al 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 more as service condition...

Page 2: ...e pump starts and stops against an open valve Pump start up When the pump is signaled to start the 4 Way Solenoid is energized and directs fluid and pressure into the cover chamber above the diaphragm...

Page 3: ...ly This assembly is the only moving part within the valve allowing it to open or close as commanded by the pilot control system When pressure is applied to the upper diaphragm chamber and released fro...

Page 4: ...ure 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 1 4 1 6 1 2 1 0 8 6 4 3 2 1 2 2 1 2 1 0 8 6 4 3 2 1...

Page 5: ...e Iron 11 Diaphragm Buna N Nitrile 12 Inner Bearing Bolts 3 and Smaller ASTM A276 304 Stainless Steel 13 Inner Bearing Retainer 3 and Smaller ASTM A276 302 Stainless Steel 13A Bearing Retaining Ring 4...

Page 6: ...nter Angle Thread Angle 150 Angle 300 Angle Thread Angle 150 Angle 300 Port Size NPT Port Size NPT Port Size NPT Shipping Weights A B C D E F G H I J K L M in in mm in mm in mm in mm in mm in mm in mm...

Page 7: ...EPDM optional Viton optional Voltage 24VDC 24VAC or 120VAC Enclosure General Purpose NEMA 4 standard Explosion Proof NEMA 6 6P 7 9 optional Action 4 Way Actuation Solenoid Action only Main valve actio...

Page 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...

Page 9: ...n 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 FLOW...

Page 10: ...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...

Page 11: ...re used in 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 packi...

Page 12: ...switches at the desired point of valve travel 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...

Page 13: ...made during installation to protect the piping circuit from dam age Only remove the pilot control system from the valve if necessary Tubing and fittings should be kept clean and replaced exactly as re...

Page 14: ...of movement and remove excess air trapped within the cover chambers See Figure 1 Below To increase the rate of opening closing turn the adjustment screws on the speed controls OUT counterclockwise In...

Page 15: ...e flow goes into the lower chamber the Opening speed flow control restricts flow out of the upper cham ber of the main valve If valve opening is too slow turn the adjustment screw OUT counterclockwise...

Page 16: ...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...

Page 17: ...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...

Page 18: ...em Nut examine stem threads for mineral build up Remove deposits with a fine wire brush Extreme care should be taken not to damage the finish on stem guiding surfaces when disassembling Avoid applying...

Page 19: ...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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