P400 Series - 22 and 25mm Versions
Contents
1. 16 6 kg CrankcaSeCapacity ccccccecsssseeeeeeeeeeeees oA oy Aare cv 0 8 liters Volumetric Efficiency 1450 sisina s anas ietsie smts 0 95 Mechanical Efficiency 1450 ss i ss 0 83 Consult the factory for special requirements that must be met if the pump is to operate beyond one or more of the limits specified above NOTES In order to drive the pump from the side opposite the present shaft extension simply remove the valve casing from the crankcase and rotate the pumps 180 degrees to the desired position Be certain to rotate the seal case item 20 as well so that the weep holes are down at the six o clock position Ex change the oil fill and the oil drain plugs also Refer to the repair instruc tions as necessary for the proper assembly sequence P422 HORSEPOWER REQUIREMENTS HORSEPOWER RATINGS a A ar 6 1 requirements for the pump Gas engine power outputs must be approximately twice the pump power requirements shown above 68 102 178 205 Intermittent duty only We recommend a 1 15 service factor be specified when selecting an electric motor as the power source SPECIAL NOTE To compute specific pump horse The theoretical gallons per revolution power reguirements use the gal rev is 0 00683 To find specific following formula outputs at various RPM use the HP GPM X PSI 1450 formula GPM 0 00683 x RPM Specifications Model P423 U S Metric VOTO lt Ei E EEE E ERE Up t2. 0 83 Consult the factory for special requirements that must be met if the pump is to operate beyond one or more of the limits specified above NOTES In order to drive the pump from the side opposite the present shaft exten sion simply remove the valve casing from the crankcase and rotate the pumps 180 degrees to the desired position Be certain to rotate the seal case item 20 as well so that the weep holes are down at the six o clock position Exchange the oil fill and the oil drain plugs also Refer to the repair instructions as necessary for the proper assembly sequence P425 HORSEPOWER REQUIREMENTS HORSEPOWER RATINGS eee eevee requirements for the pump Gas 900 6 7 46 69 94 engine power outputs must be approximately twice the pump 1120 8 3 5 7 86 114 power reguirements shown above 450 10 7 We recommend a 1 15 service factor be specified when selecting an electric motor as the power source To compute specific pump oe me sis Pi GC mien horsepower requirements use the gal rev is 0 0074 To find specific outputs at various RPM use the on i HP GPM X PSI 1450 formula GPM 0 0074 x RPM SPECIAL NOTE Repair Instructions P420 P420 0011 P420 0021 P422 P423 and P425 Note Always take time to lubricate all metal and nonmetal parts with a light film of oil before reassembly This step will ensure proper fit at the same time protecting the pump nonmetal parts i e the elas
3. clock position Exchange the oil fill and the oil drain plugs also Refer to the repair instructions as necessary for the proper as sembly sequence P423HORSEPOWER REQUIREMENTS HORSEPOWER RATINGS The rating shown are the power 9001 5 1 35 53 70 102 requirements for the pump Gas engine power outputs must be 1160 6 6 46 68 91 13 2 approximately twice the pump 1300 74 51 77 102 148 power reguirements shown above 1450 8 2 57 85 11 3 164 3 5 1 6 5 1 5 We recommend a 1 15 service factor be specified when selecting an electric motor as the power source SPECIAL NOTE To compute specific pump horse The theoretical gallons per revolution power reguirements use the gal rev is 0 00566 To find specific following formula outputs at various RPM use the HP GPM X PSI 1450 formula GPM 0 00566 x RPM EXPLODED VIEW P420 P420 0011 P420 0021 P422 P423 AND P425 PUMPS Onl QN A A A x A P425 Onl P420 P420 0011 P420 0021 P422 P423 and P425 SPARE PARTS LIST m gt ONDOAAUHAWWHD gt U gt 16A 16B 16B 16D 16E 16F A P420 B P422 G P423 H P425 J P420 0011 QTY PART 08377 08378 06479 07186 08380 07109 07182 08092 01010 01011 0400 05290 05291 05292 05293 01016 07114 07459 05350 08475 08482 08091 08390 05349 05348 05351 05351 0001 05353 05352 08398 06247 08399 07023 07203 P420
4. rate to prevent line pressure loss to the work area It is essential to provide a safety bypass valve between the pump and the work area to protect the pump from pressure spikes in the event of a blockage or the use of a shut off gun 4 Use of a dampener is necessary to minimize pulsation at drive elements plumbing connections and other system areas The use of a dampener with Giant Industries Inc pumps is optional although recommended by Giant Industries Inc to further reduce system pulsation Dampeners can also reduce the severity of pressure spikes that occur in systems using a shut off gun A dampener must be positioned downstream from the unloader 5 Crankshaft rotation on Giant Industries Inc pumps should be made in the direction designated by the arrows on the pump crankcase Reverse rotation may be safely achieved by following a few guidelines available upon request from Giant Industries Inc Required horsepower for system operation can be obtained from the charts on pages 3 5 and page 8 6 Before beginning operation of your pumping system remember Check that the crankcase and seal areas have been properly lubricated per recom mended schedules Do not run the pump dry for extended periods of time Cavitation will result in severe damage Always remember to check that all plumbing valves are open and that pumped media can flow freely to the inlet of the pump Finally remember that high pressure operation ina pump
5. 00 s 8 N S fo Al J 1 6 40 935 5 3 135 v4x M10 6 2 158 2 8 Bo 135 Between feet 4 1 103 6 0 153 5 GIANT INDUSTRIES LIMITED WARRANTY Giant Industries Inc pumps and accessories are warranted by the manufacturer to be free from defects in workmanship and material as follows 1 Forportable pressure washers and self service car wash applications the discharge manifolds will never fail period If they ever fail we will replace them free of charge Our other pump parts used in portable pressure washers and in car wash applications are warranted for five years from the date of shipment for all pumps used in NON SALINE clean water applications 2 One 1 year from the date of shipment for all other Giant industrial and consumer pumps 3 Six 6 months from the date of shipment for all rebuilt pumps 4 Ninety 90 days from the date of shipment for all Giant accessories This warranty is limited to repair or replacement of pumps and accessories of which the manufacturer s evaluation shows were defective at the time of shipment by the manufacturer The following items are NOT covered or will void the warranty Defects caused by negligence or fault of the buyer or third party Normal wear and tear to standard wear parts Use of repair parts other than those manufactured or authorized by Giant Improper use of the product as a component part Changes or modifications made by the customer or t
6. P400 Series 22 and 25mm Versions For Models P420 P420 0011 P420 0021 P422 P423 P425 Updated 11 09 Triplex Ceramic Plunger Pump Operating Instructions Repair and Service Manual Contents Installation Instructions Pump Specifications except P425 Exploded View Parts List Kits Pump Specifications P425 Repair Instructions Torque Specs Trouble Shooting Chart Recommended Spare Parts List Dimensions Warranty Information page 2 pages 3 5 page 6 page page 8 pages 9 10 page 11 page 11 back page back page INSTALLATION INSTRUCTIONS Installation of the Giant Industries Inc pump is not a complicated procedure but there are some basic steps common to all pumps The following informa tion is to be considered as a general outline for installation If you have unique requirements please contact Giant Industries Inc or your local distributor for assistance 1 The pump should be installed flat on a base to a maximum of a 15 degree angle of inclination to ensure optimum lubrication 2 The inlet to the pump should be sized for the flow rate of the pump with no unnecessary restrictions that can cause cavitation Teflon tape should be used to seal all joints If pumps are to be operated at temperatures in excess of 160 F it is important to insure a positive head to the pump to prevent cavitation 3 The discharge plumbing from the pump should be properly sized to the flow
7. P420 0011 P420 0021 P422 P423 and P425 REPAIR KITS DESCRIPTION Crankcase Oil Fill Plug with Gasket Crankcase cover Oil Sight Glass w Gasket O Ring Oil Drain Plug Gasket for Oil Drain Plug Plug with Gasket Screw Spring Washer Bearing Cover Open Bearing Cover Closed Shim Shim May not be present O Ring Screw with Washer Radial Shaft Seal Taper Roller Bearing Crankshaft A B J amp K Crankshaft G amp H Fitting Key Connecting Rod Assembly Connecting Rod Screw Adapter Sleeve Plunger Assy 25mm A amp H For items 16A 16H Plunger Assy 25mm J amp K For items 16A 16H Plunger Assy 22mm B amp G For items 16A 16H Plunger Base Plunger Pipe 25mm A H J amp K Plunger Pipe 22mm B amp G Tensioning Screw O Ring Backup Ring Plunger Packing Kits P420 P425 09140 Item 21 23 23B 24 Part 07266 12254 12255 08376 Description O Ring V Sleeve Weep Seal Pressure Ring Valve Assembly Kit P420 P422 P423 P425 09143 ltem 27A 33 Optional Viton Plunger Packing Kit Part 08408 07214 Description Valve Assembly Complete O Ring P420 0011 09140 0011 Item 21 23 23B 24 Optional Viton Valve Assembly Kit Part 07266 0001 12254 0010 12255 0010 08376 Description O Ring Viton V Sleeve Viton Weep Seal Viton Pressure Ring P420 P422 P423 P425 09143 0001 ltem 27A 39 Part 08408 0001 07214 0001 Des
8. Slide valve casing over plungers and seat firmly Replace the 8 socket head cap screws 34 and tighten to 30 ft los 40 NM in a crossing pattern as shown at right ISS z a ur f _ n e SSS Torque Specifications P420 P420 0011 P420 0021 P422 P423 and P425 Position ltem Description U S Metric 15A 05349 Screw with Washer 97 in lbs 11 NM 16D 08399 Tensioning Screw 22 ft lbs 30 NM 32 08373 Plug 107 ft lbs 145 NM 34 08396 Cap Screw 30 ft lbs 40 NM Contact Giant Industries for service school information Phone 419 531 4600 10 MALFUNCTION The Pressure and or the Delivery Drops Water in crankcase Noisy Operation Rough Pulsating Operation with Pressure Drop Pump Pressure as Rated Pressure Drop at Gun Excessive Leakage High Crankcase Temperature PUMP SYSTEM MALFUNCTION CAUSE Worn packing seals Broken valve spring Belt slippage Worn or Damaged nozzle Fouled discharge valve Fouled inlet strainer Worn or Damaged hose Worn or Plugged relief valve on pump Cavitation pump for restrictions Unloader High humidity Worn seals Worn bearings Cavitation Worn packing Inlet restriction Accumulator pressure Unloader Cavitation Restricted discharge plumbing Worn plungers Worn packing seals Excessive vacuum Cracked plungers Inlet pressure too high Wrong Grade of oil Improper amount of oil in crankcase REMEDY Replace packing seal
9. V Sleeve with Support Ring Weep Seal Pressure Ring Description Oil Seal P420 0021 09140 0021 Item 21 23 23B 24 Part 07266 0001 12254 0020 12255 0020 08376 Description O Ring Viton V Sleeve Teflon Weep Seal Teflon Pressure Ring 3 r x ODO DOD DOD DO DO DOD DOD DD DOD GO O GO O GO 0G CO CO GO W WWWWWWWWW CO CO vw v vB og Specifications Model P425 U S Metric VOUE ose ts aeciestslon sah scteneeeceasemeesionsaeceaeneneseut Up to 10 7 GF Mass 40 6 LPM Discharge Pressure csccccssseeeceeeeeesaeeees Up to 2465 PSI 170 bar Inlet Pressure lt teaecsencienevewcaieteaconde ene seanacdienss 4 35 to 145 PSI 3 to 10 bar SORG ake ss i a VS S 20mm AFM a S S A S Up to 1450 RPM Plunger Diameter vasas auss srse uns i m s DIS as 3 25mm Temperature of Pumped Fluids UP TO 160 7 es 71 C MMU PORES 2 a 0 a S BS I A a a a nabs 2 1 NPT Discharge FO ass D I 2 3 4 NPT le Ola OM cea secre a Top of pulley towards manifold Crankshaft Diameter ccccccseeeeeeeeeeeeees VO eee es 28mm KEY WICU m vas ass a i ss gl a 8mm SNA MOUNINO gage seentyesnasieaecytcecoeren nase anne esiecdepaadefuctiansdaceeess Either side Meghi 4 so opdbS LI0Z ss 16 64 kg CrankcaseCapacity cccccceesssseeeeeeeeeeeees arildzs 0 8 liters Volumetric Efficiency SU sa vo N S S S 0 95 Mechanical Efficiency 1450
10. cription Valve Assembly Complete O Ring a dv dv Dvou vw 8 WWWWWW C oof Qty 6 6 K P420 0021 ITEM PART DESCRIPTION 16G 07258 06431 06790 05444 05443 05601 07266 07266 0001 12254 12254 0010 12254 0020 06249 06251 12255 12255 0010 12255 0020 13390 08376 06252 08394 06254 08395 08408 08408 0001 08370 06791 0100 06377 0100 08372 07212 07212 0001 08373 07214 07214 0001 08396 Copper Washer Oil Scraper Crosshead Pin Oil Seal Seal Case A H J amp K Seal Case B amp G O Ring A B G amp H O Ring Viton J amp K V Sleeve 25mm A amp H V Sleeve 25mm Viton J V Sleeve 25mm Teflon K V Sleeve with Support Ring 22mm B amp G Spacer Ring B amp G Weep Seal A amp H Weep Seal Viton J Weep Seal Teflon K Weep Seal B amp G Pressure Ring A H J amp K Pressure Ring B amp G Weep Return Ring A H J amp K Weep Return Ring B amp G Manifold Valve Assembly A B G amp H Valve Assembly J amp K Valve Seat Valve Plate Valve Spring Valve Spring Retainer O Ring A B G amp H O Ring Viton J amp K Plug O Ring A B G amp H O Ring Viton J amp K Cap Screw Plunger Packing Kit P422 P423 09295 Item 21 23 23B Part 07266 06249 13390 06252 24 Oil Seal Kit P400 Series 09641 ltem 19 Optional Teflon Plunger Packing Kit Part 05444 Description O Ring
11. e rating shown are the power l 4 8 93 engine power outputs must be approximately twice the pump power requirements shown above 109 75 113 128 16 4 12 8 88 13 2 15 0 19 2 Werecommenda 1 15 service factor be specified when selecting an electric motor as the power source To compute specific pump horse power reguirements use the following formula HP GPM X PSI 1450 requirements for the pump Gas a 8 5 4 6 1 7 9 8 8 SPECIAL NOTE The theoretical gallons per revolution gal rev is 0 0088 To find specific outputs at various RPM use the formula GPM 0 0088 x RPM Specifications Model P422 U S Metric volume S UPIOSG GF ei 37 3 LPM Discharge Pressure Continuous Up to 2600 PSI i ssesscns dress 180 bar Discharge Pressure Intermittent Up to 3000 PSI zsisisesam s 206 8 bar Inlet PrESSUTE sasen E 4 35 to 145 PSI 3 to 10 bar A ene A E N OOA a 24mm BENINA Up to 1450 RPM Plunger Diameter cccccccsesseceeeeseeeeenesees OOT ae 22mm Temperature of Pumped Fluids UPO 160 71 C MOTEO 1 0 A su A aa a 2 1 NPT PSG TE ol ONS vis j s ausis ejas uns un 2 3 4 NPT gliatROIdI0M ss as n Top of pulley towards manifold Crankshaft Diameter iii as LTO arp 28mm Key VVIC gab i a a dl ki au 8mm S0 MORI a N A Either side Veli ss ne 36 lbs 8OZ cesrocevennaorssiaccis
12. et Pressure cccccsseeccceeeeeeeseeeeesaeeeeeseaes 4 35 to 145 PSl 3 to 10 bar IKS a E EE E E V e eter eee 24mm a N EEE T PENA E S Up to 1450 RPM Plunger Diameter c cccccsseecceeeeseeeeesesees BS a EE 25mm Temperature of Pumped Fluids Up to 160 F ESA 71 C MET OES oe S E 2 1 NPT Blicle te ge om PONO eire i N K 2 3 4 NPT SE FAO LAH ON sin Top of pulley towards fluid end Crankshaft Diameter ccccccseeeeeeeeeeeeees Ml ss S 28mm KEV VV ass i ss 645 1 5 UR R 8mm shai MOUN ee sv a S S Either side VISI BD 36 IDS GOZ scarpine 16 6 kg Crankcase Capacity ccccccsssseeeeeeeeeeeeees 27 WHOZ ma a 0 8 liters Volumetric Efficiency 14 U as m N seeseeneeane 0 95 Mechanical Efficiency 1450 0 86 Consult the factory for special requirements that must be met if the pump Is to operate beyond one or more of the limits specified above NOTES In order to drive the pump from the side opposite the present shaft exten sion simply remove the valve casing from the crankcase and rotate the pumps 180 degrees to the desired position Be certain to rotate the seal case item 20 as well so that the weep holes are down at the six o clock position Exchange the oil fill and the oil drain plugs also Refer to the repair instructions as necessary for the proper assembly sequence P420 HORSEPOWER REQUIREMENTS HORSEPOWER RATINGS GPM11000 PSI Th
13. hird party The operation of pumps and or accessories exceeding the specifications set forth in the Operations Manuals provided by Giant Industries Inc Liability under this warranty is on all non wear parts and limited to the replacement or repair of those products returned freight prepaid to Giant Industries which are deemed to be defective due to workmanship or failure of material A Returned Goods Authorization R G A number and completed warranty evaluation form is required prior to the return to Giant Industries of all products under warranty consideration Call 419 531 4600 or fax 419 531 6836 to obtain an R G A number Repair or replacement of defective products as provided is the sole and exclusive remedy provided hereunder and the MANUFACTURER SHALL NOT BE LIABLE FOR FURTHER LOSS DAMAGES OR EXPENSES INCLUD ING INCIDENTAL AND CONSEQUENTIAL DAMAGES DIRECTLY OR INDIRECTLY ARISING FROM THE SALE OR USE OF THIS PRODUCT THE LIMITED WARRANTY SET FORTH HEREIN IS IN LIEU OF ALL OTHER WARRANTIES OR REPRESEN TATION EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY WARRANTIES OR MERCHANT ABILITY OR FITNESS FOR A PARTICULAR PURPOSE AND ALL SUCH WARRANTIES ARE HEREBY DISCLAIMED AND EXCLUDED BY THE MANUFACTURER GIANT INDUSTRIES INC 900 N Westwood Ave P O Box 3187 Toledo Ohio 43607 PHONE 419 531 4600 FAX 419 531 6836 www giantpumps com Copyright 2009 Giant Industries Inc 11 09 P400 22_25mm PMD
14. maged Repair Instructions P420 P420 0011 P420 0021 P422 P423 and P425 9 Check surfaces of plunger 16 Damaged surfaces cause accelerated seal wear Deposits of all kinds must be removed from the plungers 11 If oil leaks under under the plunger 16 the oil seals 19 need to be replaced Remove oil plug 5 and drain oil With the valve casing 26 and seal case 20 removed ref instruc tions 5 amp 6 and plunger disassembled ref 10 carefully pry out the oil seal with a flat screwdriver and replace it with a new one Make sure that the oil seal groove faces inward towards the oil NOTE Be careful not to score the crankcase guides where the oil seal sits and where the plunger base 16A moves through the crankcase 1 10 If the plunger pipe 16B is IMPORTANT Plunger surfaces are not to be damaged If there are lime deposits in the pump care must be taken that the drip return bore in parts 25 and 26 ensure trouble free drip return damaged or worn remove tension screw 16D and plunger pipe 16B Check and clean plunger surface 16A and check flinger 16H Cover thread of tension screw 16D witha thin film of Loctite and tighten carefully to 22 ft lbs 30NM 12 After installation of high pressure seals 23 place seal case 20 with weep seals amp pressure ring installed weep return ring 25 and high pressure weep return ring 24 over plungers
15. o 8 2 GPM cp ssnscecseseas 31 1 LPM Discharge Pressure ccccccseeeeeeseeeeesaeeees Up to 2900 PSI 200 bar Inlet Pressure as a 4 35 to 145 PSl 3 to 10 bar SOK si V sane nent ee eran erent 20mm EMS as S N a a I I Up to 1450 RPM Plunger Diameter cccccccssssecseeeeseeeesseeees U67 pa na 22mm Temperature of Pumped Fluids Up to 160 Fans 71 C ING ia 9 coe a E A S V S 2 1 NPT DICRO S We OMG cd a a E 2 3 4 NPT Shaft Rotation a acece sinters cciaesacteeassenseuneaeoncasaeces Top of pulley towards manifold Crankshaft Diameter ccccccsseeeeeeseeeeees VIDZ ss ss 28mm Key Widi sa go S ln ceeessanemeeces 8mm mI IVIOUIN ING seee tent gcevan anteeebagetendeanaoe Either side VVOIOM uses etecteanenaeaededvastaeneceeriecsesentet 36 IDS 80Z i a 16 6 kg CrankcaseCapacity ccccccesssseeeeeeeeeeeeees zi ikOZ 0 8 liters Volumetric Efficiency IS ss sa nais 0 95 Mechanical Efficiency 1450 0 83 Consult the factory for special requirements that must be met if the pump is to operate beyond one or more of the limits specified above NOTES In order to drive the pump from the side opposite the present shaft extension simply remove the valve casing from the crankcase and rotate the pumps 180 degrees to the desired position Be certain to rotate the seal case item 20 as well so that the weep holes are down at the six o
16. s Replace spring Tighten or Replace belt Replace nozzle Clean valve assembly Clean strainer Repair Replace hose Clean Reset and Replace worn parts Check suction lines on inlet of Check for proper operation Reduce oil change interval Replace seals Replace bearings Refill crankcase oil with recommended lubricant Check inlet lines for restrictions and or proper sizing Replace packing Check system for stoppage air leaks correctly sized inlet plumbing to pump Recharge Replace accumulator Check for proper operation Check inlet lines for restrictions and or proper size Re size discharge plumbing to Flow Rate of Pump Replace plungers Adjust or Replace packing seals Reduce suction vacuum Replace plungers Reduce inlet pressure Giant oil is recommended Adjust oil level to proper amount Preventative Maintenance Check List amp Recommended Spare Parts List Check Oil Level Guality Oil Leaks Water Leaks Belts Pulley Plumbing Daily Weekly 50hrs Every 500 hrs Every Every 1500 hrs 3000 hrs Recommended Spare Parts OiChange 27foz jpmtie4 X K J SS Seal Spare Parts 1 oo SS DZ Oil Seal Kit 1 Valve Spare Parts 1 kit pump See page 7 for kit list 11 Dimensions P420 P420 001 1 P420 0021 P422 P423 and P425 Inches mm 2 3 58 5 6 5 165 2 0 50 Discharge 2 0 2x 3 4 BSP amari 9 9 x O iol gt rap to N SEE Al O ies 9 Oo
17. system has many advantages But ifitis used carelessly and without regard to its potential hazard it can cause serious injury P420 P422 P423 P450 NPSHR Chart ERAAN NARRER Pt tT tt A TT A AI PEE Y Eli Tre V P450 7 Tiri MF HP m 3 o T i w U 5 _ 2 E 6 fad G Oo a Q O 2 gt melee trrti 11111 U BBI D 200 400 600 800 1000 1200 RPM IMPORTANT OPERATING CONDITIONS Failure to comply with any of these conditions invalidates the warranty 1 Prior to initial operation add oil to the crankcase so that oil level is between the two lines on the oil dipstick DO NOT OVERFILL 2 Pump operation must not exceed rated pressure volume or RPM A pressure relief device must be installed in the discharge of the system Use SAE 80 90W or Giant s p n 01154 or ISO VG220 industrial gear lube oil 3 Acids alkalines or abrasive fluids cannot be pumped unless approval in writing is obtained before operation from Giant Industries Inc Crankcase oil should be changed after the first 50 hours of operation then at regular intervals of 500 hours or less depending on operating conditions 4 Run the pump dry approximately 10 seconds to drain the water before exposure to freezing temperatures Specifications Models P420A P420A 0011 P420A 0021 U S Metric VOM sa Up to T2 S1 FM sw 48 4 LPM Discharge Pressure ii aaa Up to 2175 PSI aa 150 bar Inl
18. tomers from cutting and scoring 1 With a socket wrench remove the three dis charge valve plugs and three inlet valve plugs 32 Inspect the o ring 33 for wear and replace if damaged 4 Remove the o ring 31 Inspect all parts for wear and replace as necessary Apply one drop of loctite 243 to the valve plugs 32 and tighten to 107 ft lbs 145 NM 7 Remove the pressure rings 24 and v sleeves 23 Note P422 amp P423 pumps have a support ring from the valve casing 26 2 Using needle nose pliers remove the inlet and dis charge valve assemblies 27A Note It may be come neccesary to re move the valve seat 27 from the valve casing us ing a slidehammer 5 Use a 8mm allen wrench to remove the 8 socket head cap screws 34 Carefully slide the valve casing 26 out over the plungers 8 Remove the weep grooved seal 23 or 23B together with pressure ring 24 _ P420 and P425 only out of the seal adaptor 20 Check O rings 21 9 By inserting a small screw driver between the valve seat 27 and the valve spring retainer 30 the valve assembly can be separated 6 20 and weep return rings 25 from the valve casing IMPORTANT The grooved seal 23 on the high pressure side is to be fitted carefully into the valve casing 26 using a screw driver Under no circum stances must the seal surface in the valve casing or the seal lip be da
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