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Nordson EP2 Manual Download Page 31

27

EP2 Pump System

© 2021 Nordson Corporation

1072608-04

Problem

Possible Cause

Corrective Action

9. Loss of oil

Oil drain plug or fill cap 

loose

Tighten the plug and/or cap.

Worn shaft seal

Replace the shaft seal.

Diaphragm screw O-ring 

cracked or missing

Replace the O-ring.

Valve plate and end plate 

bolts loose

Tighten the bolts to 74−81 N•m (55−60 ft-lb), following the torque 

sequence in the EP2 Three-Piston Pump manual.

Damaged diaphragm 

cartridges

Replace the diaphragm cartridges.

10. Water or coating 

material in oil 

reservoir

Diaphragm screw O-ring 

cracked or missing

Replace the diaphragm screw O-ring.

Damaged diaphragm 

cartridges

Replace the diaphragm cartridges.

Cracked cylinder casting Replace the pump.

Repair

WARNING:  

SERVICING - Before servicing, cleaning, or removal of any part, set trigger 

lock on gun, and always shut off power source; then carefully release pressure in fluid 

portions of the system.

For EP2 pump assembly repair, refer to the pump manual:

EP2 Three-Piston Pump

  - Part 1049229

Summary of Contents for EP2

Page 1: ...rts and technical support call the Industrial Coating Systems Customer Support Center at 800 433 9319 or contact your local Nordson representative This document is subject to change without notice Check http emanuals nordson com for the latest version NORDSON CORPORATION AMHERST OHIO USA ...

Page 2: ...lified Personnel 1 Intended Use 1 Regulations and Approvals 1 Personal Safety 2 High Pressure Fluids 3 Fire Safety 4 Halogenated Hydrocarbon Solvent Hazards 4 Action in the Event of a Malfunction 5 Disposal 5 Safety Labels 6 Description 8 Pump Operation 9 System Operation 10 Specifications 12 Installation 13 Oil Change Kit Installation 13 Mounting 13 Pump Oil Level 14 Electrical Connections 14 Wir...

Page 3: ...i Change Record 2021 Nordson Corporation 1072608 04 Change Record Revision Date Change 03 9 21 Revised pump versions and configurations 04 10 21 Updated relief valve ...

Page 4: ... 2021 Nordson Corporation 1072608 04 ii Change Record ...

Page 5: ...are familiar with all relevant safety rules and regulations and are physically capable of performing their assigned tasks Intended Use Use of Nordson equipment in ways other than those described in the documentation supplied with the equipment may result in injury to persons or damage to property Some examples of unintended use of equipment include using incompatible materials making unauthorized ...

Page 6: ...ectrical equipment While operating manual spray guns make sure you are grounded Wear electrically conductive gloves or a grounding strap connected to the gun handle or other true earth ground Do not wear or carry metallic objects such as jewelry or tools If you receive even a slight electrical shock shut down all electrical or electrostatic equipment immediately Do not restart the equipment until ...

Page 7: ... an injection injury Show them this card Tell them what kind of material you were spraying MEDICAL ALERT AIRLESS SPRAY WOUNDS NOTE TO PHYSICIAN Injection in the skin is a serious traumatic injury It is important to treat the injury surgically as soon as possible Do not delay treatment to research toxicity Toxicity is a concern with some exotic coatings injected directly into the bloodstream Consul...

Page 8: ...sparking Know where emergency stop buttons shutoff valves and fire extinguishers are located If a fire starts in a spray booth immediately shut off the spray system and exhaust fans Shut off electrostatic power and ground the charging system before adjusting cleaning or repairing electrostatic equipment Clean maintain test and repair equipment according to the instructions in your equipment docume...

Page 9: ... the system immediately and perform the following steps Disconnect and lock out system electrical power Close hydraulic and pneumatic shutoff valves and relieve pressures Identify the reason for the malfunction and correct it before restarting the system Disposal Dispose of equipment and materials used in operation and servicing according to local codes ...

Page 10: ...g equipment can cause serious injury if the spray penetrates the skin Do not point the gun at anyone or any part of the body In case of penetration adequate medical aid must be immediately obtained WARNING COMPONENT RUPTURE To avoid rupture or injury do not operate this pump at a pressure higher than the maximum working pressure WARNING FIRE Static voltage is developed by airless spraying The pump...

Page 11: ...7 EP2 Pump System 2021 Nordson Corporation 1072608 04 1 2 3 4 3 5 Figure 1 Safety Label Location ...

Page 12: ...as a 380 420 V 3 phase Wye 50 60 Hz 1 5 kw electric motor NOTE See Figure 3 for system version with frame only NOTE Refer to the EP2 Three Piston Pump manual for pump repair and parts lists 1 2 3 4 5 6 7 9 8 11 12 10 13 14 15 Figure 2 EP2 Pump System with Panel and Frame 1 Ground clamp 2 Load switch 3 Pressure relief valve 4 Pressure gauge system 5 Fluid output 6 Two way ball valve priming valve 7...

Page 13: ...s the pump shaft turns it rotates a wobble plate The high spot on the wobble plate pushes on the three spring loaded oil filled pistons The pistons force the diaphragms to bow out compressing coating material and forcing it through the outlet check valves and out of the pump After the high spot of the wobble plate passes the pistons the piston springs force the pistons back and the piston refills ...

Page 14: ... the 3 way ball valve back pressure regulator and back to the supply The three way ball valve can also route the return fluid flow to the drain rod The back pressure regulator maintains the desired fluid pressure within the spray system during normal operation Depending on the application it may be removed from the panel and installed in a different location in the spray system The pressure relief...

Page 15: ... Pressure Gauge Manifold Spray System 3 Way Ball Valve 2 Way Ball Valve Back Pressure Regulator Drain Rod Dump Pressure Relief Valve Pump M Supply 2 Way 3 Way 2 Way 3 Way 2 Way 3 Way Normal Operation Flushing Priming Valve Handle Positions Figure 5 EP2 Pump System Hydraulic Diagram ...

Page 16: ...let and Outlet Port Sizes Inlet 3 4 in NPT Outlet 1 2 in NPT Pump Oil Capacity 1 04 liter 1 1 qt use only Nordson EP2 pump oil Electrical 380 420 volt 3 phase Wye 50 60 Hz Motor Speed 1725 rpm Drive Capacity 2 0 hp System Weight 68 kg 150 lb Dimensions Height top of panel to base bottom 28 46 in 722 88 mm Width including motor 40 74 in 1034 80 mm Width panel 31 in 787 4 mm Depth base and panel 13 ...

Page 17: ...l drain tube on the left side of the pump To do this without losing oil from the pump and making a mess turn the system on its side with the oil drain tube up unscrew the drain cap from the tube and install the quick disconnect fitting on the tube Mounting See Figure 6 for mounting base dimensions Mount the pump system on a sturdy flat surface such as a work bench or metal table 33 5 in 850 9 mm 3...

Page 18: ... versions and all system components including supply and waste containers to prevent static discharges that could cause a fire or explosion Wiring Guidelines Motor 380 420 volt 3 phase Wye 50 60 Hz Use electrical wiring sized and rated for use with the motor All electrical installations must conform to local regulations and codes Use approved properly sized liquid tight conduit connectors or strai...

Page 19: ...IED POWDER CORD USE LIQUID TIGHT CONDUIT CONNECTORS AND CONDUIT LOAD SWITCH WIRING DETAIL PE L1 L2 L3 T1 T2 T3 PE MOTOR JUNCTION BOX WIRING DETAIL T1 T2 T3 GND T6 T4 T5 ATTACH WIRE TO CHASSIS GROUND INSIDE JUNCTION BOX 380 420 VOLT 3 PHASE WYE 50 60 HZ AC WIRING Figure 7 Wiring Diagram ...

Page 20: ...ly line must be greater than 2 gpm Restrictions will cause cavitation resulting in abnormal wear of the gearbox section in the pump head and damage to the diaphragm cartridges Pressure fluctuations in the spray system are a sign of pump cavitation For pressure feed systems install an inline strainer filter on the siphon side of the pump with a 350 micron element The filter should be as close to th...

Page 21: ...iming 1 Place the drain rod in a waste container 2 Turn the back pressure regulator knob fully counter clockwise 3 See Figure 9 Turn the ball valves to the priming position 4 Supply coating material to the EP2 pump 5 Turn on the EP2 pump 6 Watch the drain rod When a solid stream of coating material is flowing from the rod with no air bubbles perform the Air Purge Procedure 2 Air Purge 7 See Figure...

Page 22: ...pressure relief valve does not open at the correct setting The valve protects the pump and system components from excessive pressure A malfunctioning or improperly adjusted relief valve can cause pump damage component failure and personal injury 11 Adjust the back pressure regulator to the desired production pressure 12 Trigger the applicators to purge any remaining air from the system 4 Fluid Tem...

Page 23: ...lvent flush Use a solvent that is compatible with the old material Second solvent flush Use a solvent that is compatible with the new material Refer to the System Startup procedures on page 17 1 Turn the back pressure regulator knob fully counterclockwise to de pressurize the system 2 Turn off the EP2 pump 3 If used shut off the pressure feed 4 Trigger the applicators 5 Supply the system with solv...

Page 24: ...kwise to de pressurize the system 3 Turn off the EP2 pump 4 If used shut off the pressure feed Long Term Shutdown CAUTION To prevent damage to the fluid diaphragms and seals consult a Nordson representative for types of solvents that can be left in the system for long periods of time 1 If used turn off the fluid heaters 12 15 min prior to shutdown Refer to the heater manual for procedures 2 Flush ...

Page 25: ...d pressure is at the factory setting given above 2 See Figure 10 Cut and remove the lock wire 2 3 Loosen the locknut 3 4 Rotate the adjustment cap 1 until the relief valve opens Fluid will be routed to the waste container 5 Tighten the locknut 3 against the adjustment cap 1 6 Adjust the back pressure regulator until the relief valve opens Do not exceed 93 bar 1350 psi If the relief valve does not ...

Page 26: ...il is warm 2 Turn the pump off 3 Place a pan under the pump drain tube CAUTION To prevent losing the oil prime in the piston assemblies do not rotate the pump shaft during routine oil changes 4 Drain the oil from the pump housing Without Optional Oil Change Kit With Optional Oil Change Kit a See Figure 11 Remove the oil fill cap 1 from the pump b Remove the drain cap 2 c Replace the drain cap afte...

Page 27: ...er screens if necessary Pump oil 1 Check the pump oil add EP2 oil as necessary 2 If the oil appears contaminated refer to Troubleshooting on page 24 Fittings and hoses Check the fittings hose connections and hoses for leaks Vacuum gauge on supply line if used Check the vacuum gauge The maximum vacuum allowed is 0 238 bar 7 in Hg If the vacuum exceeds 0 238 bar 7 in Hg clean the supplystrainer or i...

Page 28: ...ulator knob clockwise until the opening pressure page 21 is reached If the valve does not open adjust it as described in Pressure Relief Valve Adjustment on page 21 4 Turn the back pressure regulator knob counterclockwise to reduce thepressure 5 Repeat steps 4 and 5 a minimum of three times to ensure the valve isoperating properly Annual Maintenance Procedures Refer to the EP2 Three Piston Pump ma...

Page 29: ...r damage leaks or blockages Clear the blockage or replace the inlet line Pump supply line too small or too long When siphon feeding the supply line must be properly sized and as short as possible Use the 5 ft siphon hose shipped with the system Air leak in pump supply line Inspect the supply hose piping and fittings Tighten the connections Fittings and or valves too close to pump inlet Move any su...

Page 30: ...ssure regulator Rebuild back pressure regulator 4 High oil temperature above 140 F 60 C Cavitation Refer to problem 1 Re circulating too much material Do not operate the system for long periods of time without spraying coating material 5 Premature check valve failure Cavitation Replace the check valves Foreign material in the inlet or outlet check valves Disassemble and clean the check valves 6 Pr...

Page 31: ...hree Piston Pump manual Damaged diaphragm cartridges Replace the diaphragm cartridges 10 Water or coating material in oil reservoir Diaphragm screw O ring cracked or missing Replace the diaphragm screw O ring Damaged diaphragm cartridges Replace the diaphragm cartridges Cracked cylinder casting Replace the pump Repair WARNING SERVICING Before servicing cleaning or removal of any part set trigger l...

Page 32: ...28 EP2 Pump System 2021 Nordson Corporation 1072608 04 This page is intentionally left blank ...

Page 33: ...iption column gives the part name as well as its dimensions and other characteristics when appropriate Indentions show the relationships between assemblies subassemblies and parts If you order the assembly items 1 and 2 will be included If you order item 1 item 2 will be included If you order item 2 you will receive item 2 only The number in the Quantity column is the quantity required per unit as...

Page 34: ...n Corporation 1072608 04 EP2 Pump System See Figure 12 and the following parts list 1 3 2 4 5 6 7 8 9 7 10 11 12 14 7 13 16 17 18 21 24 27 28 29 30 31 23 15 19 20 22 25 26 Figure 12 EP2 Pump Parts shown with panel and frame version ...

Page 35: ...14 972103 CONNECTOR MALE 37 3 4 16 X 3 8 STAINLESS STEEL 2 15 973059 NIPPLE HEX 3 8 X 3 8 X 1 45 STAINLESS STEEL 2 NS 1617345 ACCESSORY GROUP EP2 PUMP PANEL MOTOR 1 A NS 1054527 ACCESSORY GROUP EP 2 PUMP 1 A 16 1617336 ASSEMBLY EP2 PUMP FRAME 5HP MOTOR 1 17 1615012 ASSEMBLY MOTOR 5HP REDUCER 2 62 1 C FACE 1 18 981315 SCREW HEX 5 16 18 X 1 000 CAP ZINC 8 19 983150 WASHER LOCK E SPLIT 5 16 STEELL NI...

Page 36: ...ROD DRAIN OFF 1 NS 1084959 HOSE NYLON STAINLESS STEEL INS 0 375 X 72 3 4 16 FTG 1 NS 141445 TOOL KIT REPAIR EP 1 NS 124630 REMOVAL TOOL EP VALVE SEAT 1 NS BAR ROUND C 1215 0 688 1 NS TOOL KIT EP PARTIAL 1 NS 981492 SCREW HEX 7 16 14 X 3 00 ZINC 3 NS 984193 NUT HEX REG 7 16 14 STEEL ZINC 3 NS 1049265 OIL EP2 2 QT 1 NS 900431 ADHESIVE PIPE THREAD HYD SEALANT 1 NS WIRE GROUP SHIELDED EP2 PUMP 1 NS 10...

Page 37: ...in ID hose 207 bar 3000 psi working pressure rating Part Length 842012 305 mm 12 in 842024 610 mm 24 in 842036 914 mm 36 in 842048 1 22 m 48 in 842072 1 83 m 72 in 842096 2 44 m 96 in 842120 3 04 m 120 in 842300 7 61 m 300 in Inline Supply Filter Lacquer Coating Systems The size of the filter element must be 350 microns Use this filter with pressure feed systems CleanSpray Systems Check with the f...

Page 38: ...34 EP2 Pump System 2021 Nordson Corporation 1072608 04 ...

Page 39: ...42 EC Machinery Directive Standards Used for Compliance EN60204 ANSI ISO 12100 Principles This product has been designed and manufactured to the directive and standards norms described above Certificates DNV ISO9001 Houston Texas __________________ Date 02Sept21 Jeremy Krone Engineering Manager Industrial Coating Systems Amherst Ohio USA Nordson Authorized Representative in the EU Person authorize...

Page 40: ...pply Machinery Safety 2008 Electrical Equipment Safety Regulations 2016 Standards Used for Compliance EN60204 ANSI ISO 12100 Principles This product has been designed and manufactured to the directive and standards norms described above Certificates DNV ISO9001 Houston Texas __________________ Date 02Sept21 Jeremy Krone Engineering Manager Industrial Coating Systems Amherst Ohio USA Nordson Author...

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