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Dover PSG Wilden Pro-Flo P420, Инструкция по эксплуатации и техническому обслуживанию, Страница: 6 / 28

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WIL-11580-E-04  

6 

P420/430 Bolted Metal 

 

SECTION 3 

 
The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show flow pattern through the pump 
upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke. 
 

 

 

 

FIGURE 1

 The air valve directs pressurized air to 

the back side of diaphragm A. The compressed 
air is applied directly to the liquid column 
separated by elastomeric diaphragms. The 
diaphragm acts as a separation membrane  
between the compressed air and liquid; a 
balanced load removes mechanical stress from 
the diaphragm. The compressed air moves the 
diaphragm away from the center of the pump. 
The opposite diaphragm is pulled in by the shaft 
connected to the pressurized diaphragm. 
Diaphragm B is on its suction stroke; air behind 
the diaphragm has been forced out to 
atmosphere through the exhaust port of the 
pump. The movement of diaphragm B toward the 
center of the pump creates a vacuum within 
chamber B. Atmospheric pressure forces fluid 
into the inlet manifold forcing the inlet valve ball 
off its seat. Liquid is free to move past the inlet 
valve ball and fill the liquid chamber (see shaded 
area). 

FIGURE 2

 When the pressurized diaphragm, 

diaphragm A, reaches the limit of its discharge 
stroke, the air valve redirects pressurized air to 
the back side of diaphragm B. The pressurized 
air forces diaphragm B away from the center 
while pulling diaphragm A to the center. 
Diaphragm B is now on its discharge stroke. 
Diaphragm B forces the inlet valve ball onto its 
seat due to the hydraulic forces developed in the 
liquid chamber and manifold of the pump. These 
same hydraulic forces lift the discharge valve ball 
off its seat, while the opposite discharge valve 
ball is forced onto its seat, forcing fluid to flow 
through the pump discharge. The movement of 
diaphragm A toward the center of the pump 
creates a vacuum within liquid chamber A. 
Atmospheric pressure forces fluid into the inlet 
manifold of the pump. The inlet valve ball is 
forced off its seat allowing the fluid being pumped 
to fill the liquid chamber. 

FIGURE 3

 At completion of the stroke, the air 

valve again redirects air to the back side of 
diaphragm A, which starts diaphragm B on its 
exhaust stroke. As the pump reaches its original 
starting point, each diaphragm has gone through 
one exhaust and one discharge stroke. This 
constitutes one complete pumping cycle. The 
pump may take several cycles to completely 
prime depending on the conditions of the 
application. 

 
 
 
 

 The 

Pro-Flo

®

 patented air distribution system incorporates two 

moving parts: the air valve spool and the pilot spool. The heart of 
the system is the air valve spool and air valve. This valve design 
incorporates an unbalanced spool. The smaller end of the spool is 
pressurized continuously, while the large end is alternately 
pressurized then exhausted to move the spool. The spool directs 
pressurized air to one air chamber while exhausting the other. The 
air causes the main shaft/diaphragm assembly to shift to one side 
— discharging liquid on that side and pulling liquid in on the other 
side. When the shaft reaches the end of its stroke, the inner piston 
actuates the pilot spool, which pressurizes and exhausts the large 
end of the air valve spool. The repositioning of the air valve spool 
routes the air to the other air chamber

 

HOW IT WORKS – AIR-OPERATED DOUBLE-DIAPHRAGM PUMP 

HOW IT WORKS – AIR DISTRIBUTION SYSTEM 

Содержание PSG Wilden Pro-Flo P420

Страница 1: ...WIL 11580 E 04 Where InnovationFlows EOM ENGINEERING OPERATION MAINTENANCE MANUAL P420 P430 Bolted Metal Pump ...

Страница 2: ...G California LLC Wil Flex is a trademark of PSG California LLC Saniflex is a trademark of PSG California LLC All trademarks names logos and service marks collectively trademarks in this document are registered and unregistered trademarks of their respective owners Nothing contained in this document should be construed as granting any license or right to use any trademark without the prior written ...

Страница 3: ...420 P430 Metal EZ Install TPE Fitted 9 P420 P430 Metal Reduced Stroke PTFE Fitted 10 P420 P430 Metal Full Stroke PTFE Fitted 10 Suction Lift Capability 11 SECTION 6 Suggested Installation Operation Maintenance and Troubleshooting 12 SECTION 7 Disassembly Reassembly 15 Pump Disassembly 15 Air Valve Disassembly 18 Reassembly Hints and Tips 21 Shaft Seal Installation 22 SECTION 8 Exploded View and Pa...

Страница 4: ...ity is not exceeded CAUTION Do not exceed 8 6 bar 125 psig air supply pressure CAUTION Do not exceed 82 C 180 F air inlet temperature for all models CAUTION The process fluid and cleaning fluids must be compatible chemically with all wetted pump components CAUTION Thoroughly flush pumps before installing them into process lines Clean and or sanitize FDA and USDA approved pumps before using them CA...

Страница 5: ...URETHANE BROWN TF PTFE WHITE VT FKM SILVER OR WHITE DOT WF WIL FLEX SANTOPRENE THREE BLACK DOTS VALVE SEATS A ALUMINUM BN BUNA N RED DOT EP EPDM BLUE DOT FS SANIFLEX HYTREL CREAM FW SANITARY WIL FLEX SANTOPRENE THREE BLACK DOTS M MILD STEEL NE NEOPRENE GREEN DOT PU POLYURETHANE BROWN S STAINLESS STEEL VT FKM WHITE DOT WF WIL FLEX SANTOPRENE THREE BLACK DOTS VALVE SEATS O RINGS TF PTFE WHITE SPECIA...

Страница 6: ...and manifold of the pump These same hydraulic forces lift the discharge valve ball off its seat while the opposite discharge valve ball is forced onto its seat forcing fluid to flow through the pump discharge The movement of diaphragm A toward the center of the pump creates a vacuum within liquid chamber A Atmospheric pressure forces fluid into the inlet manifold of the pump The inlet valve ball i...

Страница 7: ...50 9 8 H 93 3 7 J 132 5 2 K 292 11 5 L 384 15 1 M 274 10 8 N 224 8 8 P 152 6 0 R 178 7 0 S 11 0 4 LW0375 REV B P420 Metal Vertical DIMENSIONS ITEM METRIC mm STANDARD inch A 442 17 4 B 64 2 5 C 248 9 8 D 391 15 4 E 429 16 9 F 51 2 0 G 250 9 8 H 93 3 7 J 132 5 2 K 292 11 5 L 384 15 1 M 274 10 8 N 224 8 8 P 152 6 0 R 178 7 0 S 11 0 4 LW0376 REV B DIMENSIONAL DRAWING ...

Страница 8: ...06 8 1 S 152 6 0 T 170 6 7 U 11 0 4 DIN mm ANSI mm V 150 DIA 5 0 DIA W 109 DIA 3 9 DIA X 18 DIA 0 6 DIA LW0377 REV B P430 Metal DIMENSIONS ITEM METRIC mm STANDARD inch A 443 17 5 B 89 3 5 C 273 10 8 D 528 20 8 E 529 20 8 F 275 10 8 G 93 3 7 H 84 3 3 J 86 3 4 K 132 5 2 L 292 11 5 M 384 15 1 N 274 10 8 P 224 8 8 R 178 7 0 S 203 8 0 T 11 0 4 DIN mm ANSI Inch U 150 DIA 5 0 DIA V 109 DIA 4 3 DIA W 18 D...

Страница 9: ...ameters will fall in the center of the pump s performance curve Caution Do not exceed 8 6 bar 125 psig air supply pressure P420 P430 METAL TPE FITTED Ship Weights 420 Threaded AL 26 kg 57 lb 420 Threaded SS 50 kg 111 lb 420 Threaded Iron 39 kg 86 lb 430 Threaded AL 28 kg 62 lb 430 Threaded SS 53 kg 92 lb 430 Threaded Iron 42 kg 92 lb Air Inlet 19 mm 3 4 Inlet 38 mm 1 1 2 Outlet 38 mm 1 1 2 Suction...

Страница 10: ...s will fall in the center of the pump s performance curve Caution Do not exceed 8 6 bar 125 psig air supply pressure P420 P430 METAL FULL STROKE PTFE FITTED Ship Weights 420 Threaded AL 26 kg 57 lb 420 Threaded SS 50 kg 111 lb 420 Threaded Iron 39 kg 86 lb 430 Threaded AL 28 kg 62 lb 430 Threaded SS 53 kg 92 lb 430 Threaded Iron 42 kg 92 lb Air Inlet 19 mm 3 4 Inlet 38 mm 1 1 2 Outlet 38 mm 1 1 2 ...

Страница 11: ...05 m 1 000 above sea level This chart is meant to be a guide only There are many variables that can affect your pump s operating characteristics The number of intake and discharge elbows viscosity of pumping fluid elevation atmospheric pressure and pipe friction loss all affect the amount of suction lift your pump will attain SUCTION LIFT CAPABILITY ...

Страница 12: ...y counting the number of strokes per minute and then multiplying that figure by the displacement per stroke Muffler Using the standard Wilden muffler sound levels are reduced below OSHA specifications You can use other mufflers to reduce sound levels farther but they usually reduce pump performance Elevation Selecting a site that is well within the pump s dynamic lift capability will assure that l...

Страница 13: ...used to regulate volume Pump discharge rate also can be controlled by throttling the pump discharge by partially closing a valve in the discharge line of the pump This action increases friction loss which reduces flow rate See Performance This is useful when the need exists to control the pump from a remote location When the pump discharge pressure equals or exceeds the air supply pressure the pum...

Страница 14: ...o be unable to shift Pump runs but little or no product flows 1 Check for pump cavitation Slow pump speed down to allow thick material to flow into liquid chambers 2 Verify that vacuum required to lift liquid is not greater than the vapor pressure of the material being pumped cavitation 3 Check for sticking ball check valves a If material being pumped is not compatible with pump elastomers swellin...

Страница 15: ... any fluid to flow into a suitable container Be aware of any hazardous effects of contact with your process fluid NOTE Your specific pump model may vary from the configuration shown however pump disassembly procedure will be the same NOTE Replace worn parts with genuine Wilden parts for reliable performance Step 1 Step 2 Step 3 Please note alignment marks on center section Use to properly align li...

Страница 16: ...emoval of inlet manifold Remove the inlet manifold to expose the valve balls and valve seats Step 7 Step 8 Step 9 Remove the inlet valve balls and valve seats from the inlet manifold and liquid chambers and inspect for nicks gouges chemical attack or abrasive wear Using the appropriate sized wrench remove the liquid chamber from the center section The liquid chamber should be removed to expose the...

Страница 17: ...emove the remaining diaphragm assembly from the shaft secure shaft with soft jaws a vise fitted with plywood or other suitable material to ensure shaft is not nicked scratched or gouged Using an adjustable wrench remove diaphragm assembly from shaft Inspect all parts for wear and replace with genuine Wilden parts if necessary DISASSEMBLY REASSEMBLY ...

Страница 18: ...ning it upside down and allowing any fluid to flow into a suitable container Be aware of any hazardous effects of contact with your process fluid NOTE Replace worn parts with genuine Wilden parts for reliable performance Step 1 Step 2 Step 3 Loosen the air valve bolts utilizing a 5 mm 3 16 Allen wrench Remove muffler plate and air valve bolts from air valve assembly exposing muffler gasket for ins...

Страница 19: ...y Remove pilot spool sleeve retaining snap ring on both sides of center section with snap ring pliers Step 7 Step 8 Remove pilot spool sleeve from center section With O ring pick gently remove the O ring from the opposite side of the center hole cut on the spool Gently remove the pilot spool from sleeve and inspect for nicks gouges or other signs of wear Replace pilot sleeve assembly or outer slee...

Страница 20: ...WIL 11580 E 04 20 P420 430 Bolted Metal Step 9 Check center section seals for signs of wear If necessary remove seals with O ring pick and replace DISASSEMBLY REASSEMBLY ...

Страница 21: ...h NLGI grade 2 white EP bearing grease or equivalent Clean the inside of the center section shaft bore to ensure no damage is done to new shaft seals A small amount of NLGI grade 2 white EP bearing grease can be applied to the muffler and air valve gaskets to lubricate gaskets during assembly Make sure that the exhaust port on the muffler plate is centered between the two exhaust ports on the cent...

Страница 22: ...5 With the seal clamped in the pliers insert the seal into the busing bore and position the bottom of the seal into the correct groove When the bottom of the seal is seated in the groove release the clamp pressure on the pliers This will allow the seal to partially snap back to its original shape 6 After removing the pliers you will notice a slight bump in the seal shape Before the seal can be res...

Страница 23: ...WIL 11580 E 04 23 P420 430 Bolted Metal SECTION 8 P420 P430 METAL EXPLODED VIEW AND PARTS LIST ALL CIRCLED PART IDENTIFIERS ARE INCLUDED IN REPAIR KITS ...

Страница 24: ...04 5037 03 04 5037 02 Manifold Discharge Vert 1 1 4 BSPT 1 04 5038 01 04 5038 03 04 5038 02 Manifold Discharge 1 1 2 ANSI 1 04 5045 01 04 5045 03 04 5045 02 Manifold Discharge 1 1 2 DIN 1 04 5046 01 04 5046 03 04 5046 02 23 Square Pipe Plug 1 1 2 NPT 1 04 7010 01 04 7010 03 04 7010 08 Square Pipe Plug 1 1 2 BSPT 1 04 7011 01 04 7011 03 04 7011 08 24 Manifold Inlet 1 1 2 NPT 1 04 5095 01 04 5095 03...

Страница 25: ... 50 Neoprene 04 1010 51 04 1060 51 08 1080 51 50 04 1128 51 Buna N 04 1010 52 08 1080 52 50 04 1128 52 FDA Buna N 04 1010 69 Geolast 04 1022 15 EPDM 04 1010 54 04 1060 54 08 1080 54 50 04 1128 54 FDA EPDM 04 1010 74 FKM 04 1010 53 08 1080 53 50 04 1128 53 PTFE 04 1040 55 42 04 1010 55 42 04 1085 55 71 1281 551 Non Food Grade Saniflex 04 1031 46 Saniflex 04 1065 56 04 1022 56 04 1031 56 04 1060 56 ...

Страница 26: ...WIL 11580 E 04 26 P420 430 Bolted Metal NOTES ...

Страница 27: ...WIL 11580 E 04 27 P420 430 Bolted Metal NOTES ...

Страница 28: ... USA P 1 909 422 1730 psgdover com Copyright 2021 PSG a Dover Company PSG reserves the right to modify the information and illustrations contained in this document without prior notice This is a non contractual document WIL 11500 E 10 Where InnovationFlows ...

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