PVA MV250-LL Скачать руководство пользователя страница 7 | Manualshive

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PVA MV250-LL Скачать руководство пользователя страница 7

7

Operation

Refer to assembly drawings 112-5825_2 for part reference numbers.

Air Section

•

Plumb up the valve as outlined above in the Setup procedure.

•

Regulate the air pressure operating the valve between 60-100psi.

•

Making sure that the valve is not aimed toward anyone, cycle the valve several times.

Note: When the valve is cycling, the piston should be heard hitting the micrometer adjustment (10), and
the needle (1) should be seen going up and down in the center.

If the valve is not cycling properly, refer to the Troubleshooting section.

Fluid Section

•

If applied, ensure fluid pressure is removed from valve.

•

Apply air pressure to the air section of the valve to set the cylinder in the refill position, so the
needle (1) is retracted from the seat (8).

•

Using an adjustable wrench, unthread and remove the outlet check valve housing (6) from the
fluid section (7).

•

Holding the outlet check valve housing (6) upright with tip down, fill the well of this housing with
the fluid that is being dispensed. (A compatible solvent can also be used)

•

Keeping the outlet check valve housing (6) in the upright position, thread the assembly back onto
the fluid section (7) and tighten with an adjustable wrench.

•

Pressurize the material to be dispensed between 10-20 psi.

•

To bleed the fluid section, use a 3/32" Hex key to loosen the set screw (17) of the bleed port
located on the fluid section (7), being careful not to fully remove the screw.

Note: If fluid does not flow out of the bleed port, slowly increase material pressure until fluid and air
bubbles are seen or wiggle the set screw with the allen key

Note: For purging process only, do not exceed 30psi.

•

Once fluid begins to flow, retighten the set screw (17).

•

Open the stroke on the valve to full by turning the micrometer adjustment (10) counter clockwise
until it reaches its furthest point, about #3 on the dial (D).

•

Cycle the valve several times until the fluid can be seen dispensing from the tip with some force
behind it and no air bubbles can be seen in the fluid.

•

If possible turn the valve vertical so the dispense tip is pointing up in the air. Note: Hold a cloth
over the dispense tip to catch fluid flow from the tip.

•

Continue to cycle the valve until all air bubbles cease to dispense from the tip and a steady flow of
material can be seen with each shot.

Note: If material is not dispensing properly, repeat the steps to loosen the set screw then flip the valve
vertical with the tip pointing in the air and cycle until all air is removed.

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Содержание MV250-LL

Страница 1: ...i MV250 LL POSITIVE DISPLACEMENT VALVE Version 112 5825 Operation Manual Revision A Date March 2014 ...

Страница 2: ...nges subsequently made Precision Valve 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 information contained herein is the property ...

Страница 3: ...stions or problems arise do not hesitate to contact PVA s Valve Service Department for support This department can be reached at PVA headquarters via telephone or e mail Again thank you for your purchase and we look forward to assisting you in the future as you continue to improve your dispensing processes PVA Contact Information Main Office Technical Support Sales Support PVA Six Corporate Drive ...

Страница 4: ...ing and Disassembly 8 Assembly Instructions 10 General 10 Air Section 10 Fluid Section 10 Assemble Sections 11 Setting Micrometer to Zero 11 Micrometer Adjustment Breakdown 12 Spare Parts 13 Bill of Materials for MV250 LL 166 Troubleshooting 177 PVA Warranty Policy 188 Table of Figures Figure 1 Solenoid Valve 6 Figure 2 Tool Kit Contents 6 Figure 3 Micrometer Adjustment Breakdown 12 Figure 4 Micro...

Страница 5: ...wo integral check valves to make up the metering chamber The metering chamber fills as the needle retracts away from the seat then dispenses as the needle moves back toward the seat Such fluids may include but are not limited to solvents epoxies UV adhesives silicones RTV grease etc Wetted parts on the MV250 LL include 303 304 stainless steel Teflon Kalrez Safety Due to material contents being und...

Страница 6: ... Kit Contents Qty Part Number Description 2 0266244 8 Adjustable Wrench 2 26563 3 32 Hex Key 1 26561 5 64 Hex Key 1 26559 1 16 Allen Key 1 5516A18 Tweezers 1 B62 0752 Mineral Oil Lubrication Kit 2 5cc 1 B62 2048 Silicone Lubricant for O ring 2 5cc 1 9570K71 Hook and Pick Set 1 0266255 Pliers 2 53085A61 Soft Plastic Covers for Pliers 1 PB135 2 Screw Driver for Micrometer 1 PT17184 Micrometer Adjust...

Страница 7: ... section 7 and tighten with an adjustable wrench Pressurize the material to be dispensed between 10 20 psi To bleed the fluid section use a 3 32 Hex key to loosen the set screw 17 of the bleed port located on the fluid section 7 being careful not to fully remove the screw Note If fluid does not flow out of the bleed port slowly increase material pressure until fluid and air bubbles are seen or wig...

Страница 8: ... may require occasional tightening as wear occurs in order to prevent leaks around the packing Routine Cleaning and Disassembly Cleaning and rebuilding the valve will be required from time to time A spare parts kit part MV250 LL SP is available with all the normal wear parts included Begin disassembly by removing air and fluid pressure from the valve Remove all pneumatic tubing and fluid delivery ...

Страница 9: ...e the upper air body 2 from the lower air body 20 to remove the spring 9 then slide the end cap 19 off of the needle 1 Holding the lower air body 20 in one hand grab the needle 1 then push the needle and piston 21 assembly out of the lower air body Remove the 004 Buna O ring 23 from the lower air body 20 Hold the piston 21 with an adjustable wrench then use a 5 64 Hex key to unthread and remove th...

Страница 10: ...w 16 using an adjustable wrench and 5 64 Hex key to tighten Mount the other 014 Buna O ring 28 onto the piston 21 Apply a small amount of silicone grease to the inside of the lower air body 20 then drop in the piston and needle assembly Mount the 004 Buna O ring 23 on the end of the needle 1 and slide it down into the groove in the end of the lower air body 20 Slide the end cap 19 onto the needle ...

Страница 11: ...ip of a 3 32 Hex key tighten the packing nut 3 Setting Micrometer to Zero When assembling the valve it will be necessary to re calibrate the micrometer adjust back to the zero position Using the wrench A insert the inside tip of the small end into the orifice of the midsection D and rotate it clockwise until the numbered centerline is on a side that can most easily be viewed by the operator Note V...

Страница 12: ...justment Breakdown Figure 3 Micrometer Adjustment Breakdown Reference Letter Section Description A Micrometer Wrench B Top Screw C Dial D Micrometer Midsection E Collar F Micrometer End Figure 4 Micrometer Section Key ...

Страница 13: ...or this valve product number MV25 LL SP includes the following components Figure 5 Spare Parts Kit Contents Qty Part Number Description 1 114 4750 Needle 1 214 3441 Packing Teflon 1 214 6507 Seat 1 V125 Washer 1 VLV 004B 004 Buna O ring 1 VLV 004K 004 Kalrez O ring 1 VLV 006K 006 Kalrez O ring 1 VLV 007B 007 Buna O ring 1 VLV 007K 007 Kalrez O ring 2 VLV 014B 014 Buna O ring Figure 6 Drawing 112 5...

Страница 14: ...s considered confidential and proprietary information It is delivered on the express condition that it not be used disclosed or reproduced in whole or in part for any reason without prior written consent of PRECISION VALVE AUTOMATION Inc DESIGN DATE DRN BY REVISION DESCRIPTION REV RJB 09OCT12 RJB ORIGINAL DESIGN A JA 12 19 14 DER REMOVED SIDE PLUG B C D E F UNLESS OTHERWISE SPECIFIED DIMENSIONS AR...

Страница 15: ...302 SS 2 114 6556 UPPER AIR BODY 1 6061 ALUM 3 114 9206 PACKING NUT 1 303 SS 4 214 3441 PACKING 1 VIRGIN PTFE 5 214 6176 CHECK VALVE BODY INLET 1 303 SS 6 214 6177 CHECK VALVE BODY OUTLET 1 303 SS 7 214 6180 FLUID BODY 1 303 SS 8 214 6507 SEAT MV250 1 303 SS 9 01344 SPRING 1 SS 10 01423 MICROMETER HEAD 1 11 01469 SETSCREW 5 40 x 3 16 1 18 8 SS 12 02367 CHECK VALVE 1 SS 13 02368 CHECK VALVE 1 SS 14...

Страница 16: ... Lower Air Body 1 10 VLV 014B 014 Buna O ring 2 11 V202 Piston 1 12 114 4595 Upper Air Body 1 13 VLV 007B 007 Buna O ring 2 14 SH5 40x2 0 Socket Head Cap Screw 2 15 SH5 40x2 25 Socket Head Cap Screw 2 16 VLV 006K 006 Kalrez O ring 1 17 VLV 004B 004 Buna O ring 1 18 01344 Spring 1 19 V001 Set Screw 1 20 V300 Luer Adapter 1 21 V125 Washer 1 22 01423 Micrometer Adjustment 1 23 V007 Bleeder Plug 1 24 ...

Страница 17: ...sen set screw on fluid body to bleed air Valve leaks from mid section Packing nut is loose Packing is worn Tighten packing nut until snug Replace packing Valve does not dispense anything Air trapped in fluid body needle adapter or dispense needle Valve is not cycling Fluid pressure is too low Material cured in fluid section Micrometer adjustment set too low Flip valve upside down and cycle until a...

Страница 18: ...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 customer service 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 retur...

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