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Edson 120A, Operation Manual, Page: 4 / 14

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Edson 120A Operation Manual Download Page 4

146 DUCHAINE BLVD., NEW BEDFORD, MA.  02745-1292    TEL.  508-995-9711    FAX  508-995-5021     E-MAIL  [email protected]

Step 4

Connect The Air Line - Air line should be 1/4” pipe or hose. It should deliver at least  8 ACFM and regu
lated between 85 and 95 psi. It is connected to the tee on the top of the cylinder. It is recommended that a
flow control valve be installed between the regulator and the pump air cylinder. (Regulator and flow control
are not included.)

P-120A -02 pg. 4

 Important

Air Pumps are factory set to 60 cycles per minute with the input air

holding at 85 psi run pressure and no liquid being pumped.

 Important

Do not control pump cycle rate by increasing or decreasing air line pressure.

Air line pressure should alway be kept between 85 and 95 psi.

Step  5

Run The Pump Air Cylinder - Adjust air regulator to 90 psi. Open flow control valve all the way. Cylinder

should cycle at approximately 60 times per minute.

Step 6

Practice Adjusting The Pump Cycle Rate - There are two ways to control the cycle rate. The first is by

adjusting the 2 needle valves, one on each end of the air solenoid. The second is by closing and opening the
air flow control valve.  You will use a combination of both adjustments to set the pump performance you
need once the plumbing is installed and liquid is being pumped.
1. Open the air line.

2. Set air line pressure to 90 psi.

3. Open air flow control valve all the way.

4. Using a very small flat head screwdriver start closing (clockwise) the right hand solenoid needle valve. The

down stroke of the air cylinder should start slowing down.

5. Now close the left hand needle valve. The up stroke of the air cylinder should start to slow

6. Now reset the cycle rate to 60 cycles per minute by opening each needle valve till you are getting one

down stoke per second and you perceive that the timing on the up stroke and the down stroke is

approximately the same. Use a watch with a sweep second hand to time the cycle rate.

7. Now open and close the air flow control valve and note the change in cylinder speed.

Tee Connection

FLow Control Valve

Regulator

Open Flow Control Valve.

Adjust Right Hand Needle Valve

Adjust Left Hand Needle Valve

Page 4 Installation - Air Line

Summary of Contents for 120A

Page 1: ...minum 2 Inlet and 2 Discharge 120ACB 200 Air Powered Diaphragm Base Mount Bronze 2 Inlet and 2 Discharge l Make sure the pump received is the pump ordered Compare the pump with the packing list l Make sure the parts list attached to this manual is the one for your pump l Fill in the Serial No and Model No below AIR POWERED DIAPHRAGM PUMP MODELS 120A Pump Models Index Page 1 Index ENTER YOUR PUMP D...

Page 2: ...0 S U C T I O N H E I G H T DISCHARGE HEIGHT 13 Cycles Per Min 5 ft 1 5 m 1 ft 3 m 10 ft 3 m 12 ft 3 7 m 0 5 ft 1 5 m 10 ft 3 m 9 34 7 26 7 26 7 26 7 26 7 26 6 23 6 23 5 20 5 20 4 14 3 12 S U C T I O N H E I G H T gpm lpm gpm lpm gpm lpm Pump Performance Is Dependent On Cycle Rate of The Pump Air Cylinder The Plumbing Head l Volume is expressed in GPM gallons per minute and LPM liters per minute l...

Page 3: ...al and vertical axis Inlet Inlet Inlet Discharge Discharge OK OK OK Discharge Discharge Discharge Inlet Inlet Inlet Vertial Axis Discharge Discharge Inlet Horizontal Axis Discharge Inlet Page 3 Installation Installation Guidelines P 120A 01 pg 3 Step 1 Check All Bolts Make sure that all bolts on the pump are tight Tools 2ea 9 16 1 2 and 7 16 Box Wrenches 7 16 1 2 9 16 Step 2 Install Stainless Stee...

Page 4: ... cycle rate The first is by adjusting the 2 needle valves one on each end of the air solenoid The second is by closing and opening the air flow control valve You will use a combination of both adjustments to set the pump performance you need once the plumbing is installed and liquid is being pumped 1 Open the air line 2 Set air line pressure to 90 psi 3 Open air flow control valve all the way 4 Us...

Page 5: ...er the force of gravity liquid will pass right through a diaphragm pump Also consider a diaphragm pump can not control a siphon condition They are used many times to start one lDISCHARGE FITTINGS PIPE AND HOSE SHOULD ALL BE THE SAME SIZE AND NEVER BE SMALLER THAN THE INLET BECAUSE a smaller discharge line increases work for the pump and increases the possibility of clogging lUSE ONLY LONG RADIUS E...

Page 6: ...ry suction start performance of the pump and make clearing the valves easy Order Edson Clear Check Valves 69CL 150 1 5 lPUMPING AT THE PROPER SPEED When pumping liquid with solids the speed may be too slow to keep the solids and the liquid combined The solids will stop moving and begin to clog the line Pumping at a faster rate or decreasing the hose size to increase velocity may be the solution Ch...

Page 7: ... installation is different so use the charts as a guideline 6 Example 1 The fill test at 30 GPM The diaphragm is going up and down at 56 cycles per minute The pump is approximately 6 ft above the liquid I disconnected the installation discharge line and replaced it with a 3 ft length of 2 hose so I could do the fill test Using the 56 cycle per minute Volume Chart from page 2 I know that at a sucti...

Page 8: ...t 6 to 7 psi and when the pump is stopped the pressure may hold or slowly returns to 0 4 If you do not get any pressure reading or if the gauge does not get to 4 psi and drops off to 0 as soon as the pump stops clean or replace the suction valve and clean or resurface the valve seat as appropriate See Maintenance Valve Assemblies l Manual Test Testing the pump valves and valve seats without the us...

Page 9: ...If the cause is not obvious isolate the source Check air line for pressue and flow If ok discon nect the inlet and discharge plumbing from the pump and restart the pump If pump cycles without the plumbing connected there could be a clog in the lines The back pressure caused by a com plete blockage in the inlet and discharge line will stop the pump If the pump cylinder still does not cycle then the...

Page 10: ...and style of the diaphragm used Call Edson Customer Service for details 4 Problem Pump base and or lines keep filling with solids Possible Causes a Line velocity is too slow to keep the solids in suspen sion b The percent of solids is too high Action Speeding up the pump will help increase the velocity Using a strainer can reduce the size and percent of solids Diluting the slurry by increasing the...

Page 11: ... B 388 Head Ring 1 4 20X1 5 16 24 nut 2 Discharge Chamber Adaptor Frame Valve Assembly Valve Assembly Air Cylinder 161 A 416 5 16 18 x 1 113N 0 Nitrile Diaphragm 160 A 906 Lower Standard 160 A 1200 Sealing Washer 3 8 16 x 1 160 B 68B 2 Suction Chamber 160 B 50B 200 160 G 107 160 G 107 160 C 298 Pump Base 1 4 20 x 1 161 C 476 161 A 403 Upper Standard 1 4 20X1 5 16 24 nut 2 Discharge Chamber Adaptor...

Page 12: ...er Standard 1 4 20X1 5 16 24 nut 2 Discharge Chamber Adaptor Frame Valve Assembly Valve Assembly 161 D 69 Frame 161 C 389 Leg 161 A 147 Handle Nitrile Order No 114N 117 120 1 Diaphragm 113N 0 2 Valve Assemblies 160 G 107 2 Sealing Washers 160 A 1200 Viton Order No 114V 117 120 1 Diaphragm 113V 0 2 Valve Assemblies 160 G 107V 2 Sealing Washers 160 A 1200 P 120A 02 pg 12 Parts 120AWA 200 161 A 166 W...

Page 13: ...pumps edsonintl com Parts Spares Kits Page 13 Air Cylinder Parts and Maintenance P 120A 02 pg 13 Air Cylinder Part Kits Order No s RPK 121 Rebuild Kit for 120A Includes Parts 161 A 1593 RPK 129 Spring Poppet Kit A 416 Air Cylinder 161 A 1853 Air Cylinder Timing Valve for 120A 161 A 1472 ...

Page 14: ...146 DUCHAINE BLVD NEW BEDFORD MA 02745 1292 TEL 508 995 9711 FAX 508 995 5021 E MAIL pumps edsonintl com Page 14 Air Cylinder Parts and Maintenance P 120A 02 pg 14 ...

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