PVA PC200 Series User manual

Precision Valve & Automation
One Mustang Drive
Cohoes, NY 12047
www.pva.net
PC200 Valve Series
OWNER’S MANUAL
Rev G
WHERE
PRECISION
DRIVES
PRODUCTION

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This document is based on information available at the time of its publication. While
efforts have been made to ensure the contents of this manual are accurate, the
information contained herein does not purport to cover all specific details or variations
in hardware, or to provide for every possible contingency in connection with
installation, operation, or maintenance. Features may be described herein which are
not present in all hardware and software systems. Precision Valve and Automation, Inc.
assumes no obligation of notice to holders of this 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 information contained herein, is the property of
Precision Valve and Automation, Inc. and is 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 and Automation, Inc.
Copyright © 2019
Precision Valve and Automation, Inc.
All Rights Reserved.

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Table of Contents
1. Introduction ............................................................................................. 5
Document History ............................................................................................... 5
Safety .................................................................................................................. 6
Theory of Operation............................................................................................ 7
Air Section ...................................................................................................7
Fluid Section................................................................................................7
Pneumatic Schematic.......................................................................................... 7
Personal Protective Equipment .......................................................................... 8
Waste Disposal.................................................................................................... 8
Tool Kit ................................................................................................................ 8
Overview.................................................................................................. 9
Valve Operation ..................................................................................... 10
Startup .............................................................................................................. 10
Install the Static Mixer ...................................................................................... 11
Shutdown.......................................................................................................... 13
Maintenance .......................................................................................... 13
Disassemble the Valve ...................................................................................... 14
Procedure.................................................................................................. 14
Clean the Disassembled Valve .......................................................................... 21
Assemble the Valve........................................................................................... 23
Procedure.................................................................................................. 23
With a Press ..............................................................................................28
To Engage by Hand:...................................................................................29
Periodic Maintenance............................................................................. 33
How to Replace a Static Mixer.......................................................................... 33
How to Replace Lip Seals .................................................................................. 33
Seal Plate Lip Seals ....................................................................................33
Fluid Section Lip Seals ............................................................................... 33

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How to Replace Valve Rods .............................................................................. 33
How to Replace Sleeve Bearings....................................................................... 33
How to Replace O-rings .................................................................................... 34
Piston O-ring .............................................................................................34
Fluid Section O-rings .................................................................................34
Air Cylinder O-rings ...................................................................................34
Fluid Manifold O-rings ..............................................................................34
PC200R Series Reference ........................................................................ 34
PC200R-SS Bill of Materials............................................................................... 35
PC200R-AL Bill of Materials............................................................................... 36
PC200R Series Mechanical Drawings ................................................................ 37
PC200R Series Exploded View........................................................................... 38
PC200RW Series Reference ..................................................................... 38
PC200RW-SS Bill of Materials ........................................................................... 39
PC200RW-AL Bill of Materials ........................................................................... 40
PC200RW Series Mechanical Drawings ............................................................ 41
PC200RW Series Exploded View ....................................................................... 42
How to Order ......................................................................................... 43
Accessories and Options ................................................................................... 44
Spare Parts ............................................................................................. 46
Spare Parts Kits ................................................................................................. 46
Technical Specifications .......................................................................... 50
Troubleshooting ..................................................................................... 51
Notes ..................................................................................................... 53
Warranty................................................................................................ 54
Table of Figures ...................................................................................... 55

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1. Introduction
Before you operate this system, read the operation and setup manual. This will help you
to become familiar with the product and ensure successful operation.
If any questions or problems arise, contact PVA’s Customer Service Department for
support.
PVA Contact Information
Main Office PVA
One Mustang Drive
Cohoes, NY 12047
Tel [phone]
Fax [phone]
Website http://www.pva.net
Email mailto: [e-mail]
Technical Support
Tel [phone]
Email mailto: [email protected]
Document History
Revision
Revision Date
Reason for Changes
Revision G
March 2019
Part Number Updated
Revision F
February 2016
Initial Release of New Template
NOTE: All photographs and CAD model representations in this document are a
“general representation” of the valve and its components. The actual
appearance of the valve and its components can differ based upon customer
specific configuration.

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Safety
Certain warning symbols are affixed to the machine and correspond to notations in this
manual. Before operating the system, identify these warning labels and read the
notices described below. Not all labels may be used on any specific system.
Always wear approved safety glasses when you operate or
work near the workcell.
Before you operate the system, read and understand the
manuals provided with the unit.
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 work with pressurized vessels or vessels
that contain chemicals.
Shear hazard from moving parts. Avoid contact.

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Theory of Operation
The PC200 is a rear closing, two component dispensing valve. Applications include
potting, bead placement, and gaskets where a low to medium flow rate is required. This
valve has adjustable snuff back to prevent drips or strings at the end of the static mixer.
Part A and part B materials flow into the valve separately and out of the valve separately
into a disposable static mixer. It is not necessary to disassemble and clean the valve at
the end of each day. The PC200 has a divorced design made of two major sections: the
air section and the fluid section
Air Section
The air section is an aluminum body with a simple piston/cylinder combination used to
open and close the valve. The stroke adjustment screw in the upper air body controls
how far the piston and rod assembly can retract and controls snuff back.
Fluid Section
The fluid section is available in two materials:
•Stainless steel
•Aluminum (decreased weight for handheld applications)
The fluid section includes two rods with lip seals on each side of the valve to control
fluid flow of part A and part B. Fluid dispenses as the rods move to the forward position
past the lip seals. When the rods retract back into the lip seals the fluid flow stops and
creates a snuff back action on the fluid.
Pneumatic Schematic
Figure 1: General PC200 Pneumatic Schematic

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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.
Tool Kit
PVA offers tool kits for dispense valves. The tool kit for the PC200 series valve is part
number B12-2602. This includes all necessary tools and lubricant to do maintenance on
this valve.
Table 1: B12-2602 Contents List
Qty
Part Number
Description
1
0266244
8” Adjustable Wrench
1
7122A47
3/16” Hex Key
2
26571
5/32” Hex Key
2
7122A44
1/8” Hex Key
2
7122A43
7/64” Hex Key
1
56945A13
3/16” Combination Wrench
1
B62-2048
2.5cc Silicone Lubricant
1
MM115
Removable Thread Locker
1
5516A18
Tweezers
1
9570K71
Hook and Pick Set
1
214-0544
Lip Seal Alignment Tool
1
98381A636
Lip Seal Insertion Tool
1
8511T17
Tool Bag

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Overview
Before you operate the valve, know the valve components. Examine the valve
components shown below for safe and correct operation.
Figure 2: Valve Components

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Valve Operation
Startup
1. Install the valve pneumatically as shown in Section 1.5 and set the air
pressure that operates the valve between 60-100 psi.
2. Cycle the valve several times. Make sure that the valve is not pointed at
anyone.
When the valve cycles correctly, you can hear the piston hit the stroke adjustment
screw and the rods can be seen going up and down in the center.
NOTE: If the valve does not cycle correctly, refer to Section 11.
3. Connect the material delivery system to the valve. Part A material
connects on the on the left side, part B material connects on the right side.
4. Cycle the valve open to bleed. Part A and B materials should start to
flow separately out of the fluid manifold.
5. Bleed the valve until all the air is released, and the material releases
smoothly without any breaks in the flow. Any break in the flow of the
material shows there is still air in the system.
6. Bleed air from the bleed screws if necessary.
NOTE: Part A and B materials may not start to dispense from the valve at
the same time, flow depends on the necessary mix ratio.
7. Use a 3/16” hex key to adjust the stroke adjustment screw to get the
necessary amount of snuff back.
Turn the stroke adjustment screw clockwise to decrease the amount of snuff back,
or counter-clockwise to increase the amount of snuff back. If the stroke adjustment
screw is turned down too far the valve will not close and material will leak from the
manifold nozzle.
NOTE: A good general setting for snuff back is to turn the stroke
adjustment screw clockwise until material starts to leak from the valve
manifold when under pressure, then turn the stroke adjustment screw a ½
turn counter-clockwise or until it does not leak.
8. When snuff back is set, use an adjustable wrench to tighten the jam nut
against the sealing washer and cylinder cap to lock it in place.
NOTE: Refer to Section 11 for any other problems.