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MR2 Manual

Revision B

/

June 2021

Page 7

of

34

Theory of Operation

The MR2 has a dual piston system and can process 2K materials with mix ratios up to 15:1.
For 1K chemistries, the MR2 alternates metering chambers to reduce refill time and increase
throughput. Each metering chamber is controlled independently so the mix ratio and flow
rate can be changed at the application point.

Personal Protective Equipment

Operators must use eye protection because material contents are under pressure. Always
wear gloves when handling materials and solvents. Refer to MSDS sheets on the material
being dispensed for other precautions.

Waste Disposal

Dispose of all used parts and materials in accordance with local laws and regulations.

Necessary Tools

PVA offers tools and cleaning accessories to maintain the MR2.

Part Number

Description

02506

Hook and Pick Set

Soft-jaw Pliers and/or Vice

Lubrication Fluid

Silicone Grease

2.5mm and 3mm T-handle or Hex Key

90° Snap Ring Pliers

Figure 1: MR2 Tool Kit

Spare Parts Kit

Part Number

Description

612-12675-1

Soft Seals (Does not include diaphragm)

614-12157-1

Diaphragm

Figure 2: Spare Parts Kit

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Содержание MR2

Страница 1: ...MR2 Owner s Manual Revision B WHERE PRECISION DRIVES PRODUCTION ...

Страница 2: ...is document with respect to changes subsequently made Precision Valve and Automation Inc makes no representation or warranty expressed implied or statutory with respect to and assumes no responsibility for the accuracy completeness sufficiency or usefulness of the information contained herein No warranties of merchantability or fitness for purpose shall apply This document including the informatio...

Страница 3: ...re Parts Kit 7 Setup 8 Overview 8 Operation 9 Bleed the Pump 9 Shutdown 9 Disassembly 9 Assembly Instructions 15 Bottom Fluid Section 15 Metering Piston Assembly 18 Metering Sleeve 19 Fill the Fluid Distribution Block 25 Install the MR2 26 Maintenance 27 Spare Parts 27 Technical Specifications 28 Troubleshooting 28 Damaged Valve Gasket 29 Worn O Ring 30 Calling Technical Support 30 Notes 31 Warran...

Страница 4: ...ne Mustang Drive Cohoes NY 12047 Tel 1 518 371 2684 Fax 1 518 371 2688 Website http www pva net Email info pva net Technical Support Tel 1 844 734 0209 Email cs pva net Document History Revision Revision Date Reason for Changes REV B June 2021 Spare Parts Kit REV A January 2020 Initial Release Note All photographs and CAD model representations in this document are a general representation of the s...

Страница 5: ...it Never put hands or tools in areas with this symbol when the machine is in operation A dangerous condition may exist Read and understand the manuals provided with the unit before any repairs or maintenance is done Only a qualified individual should do service Use caution when there are pressurized vessels Find and repair any leaks immediately Always wear appropriate safety equipment when you wor...

Страница 6: ...e that hazardous voltages current temperatures or other conditions that could cause personal injury exist in this equipment or may be associated with its use Only qualified personnel should enter areas designated with this symbol Laser light source present Do not stare directly into the beam Do not use in the presence of highly reflective surfaces Pinch hazard from moving parts Avoid contact Hot s...

Страница 7: ...contents are under pressure Always wear gloves when handling materials and solvents Refer to MSDS sheets on the material being dispensed for other precautions Waste Disposal Dispose of all used parts and materials in accordance with local laws and regulations Necessary Tools PVA offers tools and cleaning accessories to maintain the MR2 Part Number Description 02506 Hook and Pick Set Soft jaw Plier...

Страница 8: ...verview The MR2 Metered Piston Dispenser is constructed from three main components The upper section of the valve is called the metering body it houses the carbide cylinders and pistons On the front of the metering body is the oil window and fluid distribution block which are used to ensure the pistons function smoothly The lower section of the valve is called the metering sleeve which is covered ...

Страница 9: ...ystem to zero 2 Bleed the pressure out of the valve and install the nightcap Make sure to wipe off any excess material before screwing on nightcap If there are two materials do not mix them or they will cure Disassembly 1 Before you remove the MR2 from the material supply system purge the material or manually empty and do not refill Make sure the pistons are all the way down 2 Engage the workcell ...

Страница 10: ...f wear 8 Use a 3 mm hex key to remove the six M4x16 bolts on the front of the air body Figure 5 Remove the Air Body Bolts 9 Remove the air body 10 If necessary remove the valve stop Figure 6 Remove the Valve Stop 11 Remove the inlet and outlet pistons from the air body Figure 7 Remove and Clean the Pistons 12 Clean the air body and the pistons 13 Examine the piston O rings for wear If they are wor...

Страница 11: ...g the metering sleeve If the valve gasket is worn it will be necessary to replace DO NOT flip the valve gasket over or you can damage the valve Figure 8 Worn Valve Gasket 16 Use a 3 mm hex key to remove the four M4x12 screws on the bottom of the fluid outlet Figure 9 Remove the Fluid Outlet 17 Remove the fluid outlet Figure 10 Fluid Outlet Removed 18 Examine the O rings in the fluid distribution b...

Страница 12: ...ng sleeve from the metering body Figure 11 Remove the Metering Sleeve Screws 20 Separate the metering sleeve from the metering body Figure 12 Separate the Metering Sleeve from the Metering Body 21 Use your finger to push on the rod to remove the rod and carbide cylinder assembly Figure 13 Push the Rod ...

Страница 13: ...the two O rings on the top and bottom of the carbide cylinders for any sign of wear or damage If they are damaged replace them Figure 15 Rod Carbide Cylinder and O rings 25 Clean any material from the rod and lip seals If the lip seals are worn or damaged replace them 26 Examine the rods for any vertical scratches If they have vertical scratches replace them Figure 16 Rod Without Vertical Scratche...

Страница 14: ...piston use a screwdriver with the other hand to loosen the piston lip screw Figure 17 Use Soft Grip Pliers Install the piston into the vice Make sure the vice has a soft grip Use a screwdriver to loosen the piston lip screw Figure 18 Piston in a Vice 28 Separate the piston washer lip seal and screw Figure 19 Components Separated 29 Examine the lip seal for signs of wear and replace if damaged ...

Страница 15: ... internal O rings for any signs of damage or wear Assembly Instructions Bottom Fluid Section 1 Install the two O rings in the inlet valve pistons x2 2 Install the two O rings in the outlet valve pistons x2 Figure 21 Pistons with O rings Installed 3 Apply clear silicon lubricant to all piston O rings Figure 22 Apply Lubricant to the O rings 4 Install the pistons into the valve body ...

Страница 16: ...Install the valve stop It should slide over the pins for correct alignment and the pistons should be flush with the top of the valve stop Figure 24 Install the Valve Stop 6 Install the valve gasket over the dowel pins on top of the valve stop Figure 25 Install the Valve Gasket ...

Страница 17: ...ock Note Make sure the fluid distribution block is installed so the fluid outlet is on the same side as the etched part number on the valve stop Figure 27 Correct Installation of the Fluid Distribution Block 8 Install the six M4x25 bolts in the top of the valve stop Tighten the bolts in an X pattern until they are tight Figure 28 Tighten the Bolts in a Cross Pattern ...

Страница 18: ...he lip seal Figure 29 Apply Grease to the Lip Seal 2 On the threaded end of the piston install the piston lip the lip seal and the screw Make sure the O ring flared side of the lip seal faces the screw as shown Figure 30 Metering Piston Assembly Order 3 Tighten the screw Figure 31 Metering Piston with Screw Tightened ...

Страница 19: ...2 Metering Sleeve with O rings Installed 2 Install the metering sleeve into the metering body Figure 33 Install the Metering Sleeve Note When correctly installed the bottom of the cylinders will sit flush with the bottom of the metering sleeve Figure 34 Cylinders Flush with the Metering Sleeve 3 Apply a small amount of grease to the top of the metering sleeve ...

Страница 20: ...e 5 8 snap ring on the end of the bushing to hold it in place Figure 36 Install the Snap Ring 6 Install the breather vent in the top of the metering body Figure 37 Install the Breather Vent 7 Apply a small amount of grease to the gasket and install it in the groove on the metering body Apply a small amount of grease over the top of the O ring to help seal the oil window ...

Страница 21: ...he oil window Tighten to 15 inch pounds Do not overtighten the screws or you will crack the window Figure 39 Oil Window 9 Apply a pea sized amount of grease to the inside of the carbide cylinders and slide the piston rods in the carbide cylinders It should only take finger pressure to install the rods into the cylinders Figure 40 Install the Rod Through the Cylinders ...

Страница 22: ...sure the rods continue through to the bushings Figure 41 Rods Engage Through the Bushing Figure 42 Rods Installed Through the Bushings 11 Use the pins in the metering sleeve to align it with the bottom of the metering body Figure 43 Align the Two Sections ...

Страница 23: ...n Screws 13 Apply a small amount of grease to the two metering sleeve O rings and install them Figure 45 Metering Sleeve O rings 14 Align the material outlet with the metering sleeve 15 Install the four M4x16 bolts in the material outlet and tighten the bolts in an X pattern Figure 46 Install the Material Outlet 16 Install the clamp adapter seal ...

Страница 24: ...l Revision B June 2021 Page 24 of 34 Figure 47 Clamp Adapter Seal 17 Install the clamp elbow Figure 48 Clamp Elbow Installed 18 Install the clamp Turn the wing screw until it is tight Figure 49 Install the Clamp ...

Страница 25: ...dapter 21 Install the clamp Turn the wing screw until it is tight 22 Install any air or material ports 23 Install the mixer nut Figure 51 Install the Mixer Nut Fill the Fluid Distribution Block 1 To fill the fluid distribution block with lubrication fluid use an adjustable wrench to remove the breather vent Figure 52 Breather Vent ...

Страница 26: ...ill be seen in the lubrication fluid Figure 53 Fill Line 3 Install the breather vent and tighten with an adjustable wrench Do not over tighten Install the MR2 1 Install the four screws to attach the MR2 onto the assembly 2 Install the cover and install the cover screws Figure 54 MR2 with Cover 3 Install the MR2 onto the work station or in the workcell as necessary ...

Страница 27: ...e 55 Preventative Maintenance Schedule Spare Parts Below the spare parts are highlighted and numbered Refer to your Bill of Materials and schematic for specific options on your pump The spare parts kit is part number B82 MR2 Item Description Part Number Quantity Notes Lip Seals Urethane 9505K15 2 Lubrication Fluid 206 994 8 oz bottle Clamp Gasket Teflon 43315K22 4 Valve Gasket Viton 614 12157 1 1 ...

Страница 28: ... seals and the lubrication fluid The metering rod does not refill Material pressure is too low Lip seals are damaged Increase the material pressure Replace the lip seal s and replace the lubrication fluid Material leaks from the valve body The valve gasket is damaged Replace the valve gasket The valve does not shut off The valve gasket is damaged The valve pistons have material contamination Repla...

Страница 29: ...ure 58 Remove the Air Body Bolts 2 Remove the air body 3 Remove the valve gasket Carefully lift it off and clean off any material Note If you have a two part material do not mix them or they will cure If the material has mixed you may need to disassemble and clean the MR2 4 Examine the valve gasket for any cracks or signs of wear If the valve gasket is worn replace it DO NOT flip the valve gasket ...

Страница 30: ...ner bushing 6 Apply a small amount of clear grease to new O rings Make sure the O rings are well coated 7 Install the O rings into the bushing 8 Slide the bushing into the top of the metering body 9 Use the 90 snap ring pliers to install the 5 8 snap ring Calling Technical Support Technical Support is always available to help The phone number is 1 844 734 0209 or you can email cs pva net to create...

Страница 31: ...MR2 Manual Revision B June 2021 Page 31 of 34 Notes ...

Страница 32: ...ties extend only to the original purchaser Third party warranty claims will not be honored at any time Prior to returning a product for a warranty claim a return authorization must be obtained from PVA s Technical Support department Authorization will be issued either via the telephone facsimile or in writing upon your request To qualify as a valid warranty claim the defective product must be retu...

Страница 33: ...ted 14 Figure 19 Remove the Snap Ring 15 Figure 20 Pistons with O rings Installed 15 Figure 21 Apply Lubricant to the O rings 15 Figure 22 Pistons Installed 16 Figure 23 Install the Valve Stop 16 Figure 24 Install the Valve Gasket 16 Figure 25 Fluid Distribution Block 17 Figure 26 Correct Installation of the Fluid Distribution Block 17 Figure 27 Tighten the Bolts in a Cross Pattern 17 Figure 28 Ap...

Страница 34: ...the Material Outlet 23 Figure 46 Clamp Adapter Seal 24 Figure 47 Clamp Elbow Installed 24 Figure 48 Install the Clamp 24 Figure 49 Clamp Adapter Seal 25 Figure 50 Install the Mixer Nut 25 Figure 51 Breather Vent 25 Figure 52 Fill Line 26 Figure 53 MR2 with Cover 26 Figure 54 Preventative Maintenance Schedule 27 Figure 55 B82 MR2 Spare Parts List 27 Figure 56 Technical Specifications 28 Figure 57 R...

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