PMC PX-7 User manual

Mechanical Purge
Spray & Pour Gun
PX-7
For use with non-flammable Foam and
Polyurea
For professional use only
Not for use in explosive atmospheres
Service Manual
Ref. # MN-04028
Revision2.1
August 11, 2017
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Polyurethane Machinery
Corporation PMC, for
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Polyurethane Machinery Corp.
Corporate: 1 Komo Drive, Lakewood, NJ 08701
Manufacturing: 2 Komo Drive, Lakewood, NJ 08701
Phone: [phone]
Fax: [phone]
URL: http://www.polymac-usa.com
Before installing the PX-7 Gun and start-up, carefully read all the
technical and safety documentation included in this manual. Pay
special attention to the information in order to know and understand
the operation and the conditions of use of the PX-7 Gun. All of the
information is aimed at improving user safety and avoiding possible
breakdowns from the incorrect use of the PX-7 Gun.

Table of Contents
WARRANTY........................................................................................................................................1
SAFETY AND HANDLING...................................................................................................................3
TECHNICAL SPECIFICATIONS..........................................................................................................5
GENERAL DESCRIPTION..................................................................................................................6
OPERATION.......................................................................................................................................7
Mixing Module and PCD Installation ................................................................................................8
Valving Rod Adjustment.................................................................................................................10
Rear Packing Nut Adjustment........................................................................................................10
Air Cap Valve Adjustment..............................................................................................................12
Shutdown Procedure.....................................................................................................................12
MAINTENANCE ................................................................................................................................13
Daily Cleaning Procedure..............................................................................................................14
TROUBLE SHOOTING GUIDE .........................................................................................................15
REFERENCE GUIDE........................................................................................................................16
Module Kits....................................................................................................................................16
PCD Sizes.....................................................................................................................................16
Module Drills..................................................................................................................................16
Cylinder/Piston Rebuild Kit ............................................................................................................17
Trigger Rebuild Kit.........................................................................................................................17
Gun Block Rebuild Kit, PX-7..........................................................................................................17
Screen Screw Kit, A-Side, PX-7.....................................................................................................18
Screen Screw Kit, R-Side, PX-7.....................................................................................................18
PX-7 Spare Parts Kit, #1, PX-7......................................................................................................18
PX-7 Spare Parts Kit, #3, PX-7......................................................................................................19
PX-7 Spare Parts Kit, #5, PX-7......................................................................................................19
PX-7 Spare Parts Kit, A3, PX-7......................................................................................................20
PX-7 Spare Parts Kit, A5, PX-7......................................................................................................20
Screen Kits....................................................................................................................................20
1/4” Unheated Stainless Steel Hose Assy......................................................................................21
Flush Tanks...................................................................................................................................21
PARTS IDENTIFICATION .................................................................................................................22
Gun Assembly...............................................................................................................................22
Gun Block Assembly......................................................................................................................23
Air Cylinder Assembly....................................................................................................................24

TABLE OF CONTENTS
Handle Assembly...........................................................................................................................26
Coupling Block Assembly ..............................................................................................................27
Manual Valve Assembly.................................................................................................................28
Torque Specifications ....................................................................................................................29
Table of Figures
Figure 1: PX-7 Dimensions..................................................................................................................5
Figure 2: PX-7 Overview......................................................................................................................6
Figure 3: PX-7 Side View.....................................................................................................................6
Figure 4: Safety Stop...........................................................................................................................7
Figure 5: Coupling Block Hose Installation...........................................................................................7
Figure 6: Closing Manual Valves .........................................................................................................7
Figure 7: Coupling Block Gaskets........................................................................................................7
Figure 8: Air Inlet Configuration Options..............................................................................................8
Figure 9: Turn Forward Stop Clockwise...............................................................................................9
Figure 10: Spray Configuration............................................................................................................9
Figure 11: Pour Configuration..............................................................................................................9
Figure 12: Valving Rod Adjustment....................................................................................................10
Figure 13: Rear Packing Nut..............................................................................................................10
Figure 14: Air Cap Valve Adjustment.................................................................................................12
Figure 15: Flush Block Installation.....................................................................................................14
Figure 16: Clean Parts.......................................................................................................................14
Figure 17: Kit MA-41 Shown on PX-7 ................................................................................................21
Figure 18: 2.5 Gallon Flush Tank (200426)........................................................................................21
Figure 19: 1 QT Mini Flush Tank (200216) ........................................................................................21

1
WARRANTY
Polyurethane Machinery Corporation (hereinafter “PMC”) provides this LIMITED
WARRANTY (hereinafter “Warranty”) to the original purchaser (hereinafter “Customer”) covering
this equipment and the original PMC manufactured accessories delivered with the equipment
(hereinafter “Product”) against defects in material or workmanship of the Product (hereinafter
“Defect” or “Defective”) for a period of one (1) year from the date of first purchase as shown on
the original PMC invoice (hereinafter “Warranty Period”).
If during the Warranty Period under normal use, the Product is suspected by Customer to
be Defective in material or workmanship, it is Customer’s responsibility to contact PMC and
return the Product to PMC as directed by PMC, freight prepaid. If PMC determines that the
Product is Defective and that such Defect is covered by this Warranty, PMC will credit
Customer for the reasonable freight charges incurred by Customer in returning the Defective
Product to PMC, and PMC (or its authorized agent) will, at PMC’s option, repair or replace
the Product, subject to the following:
Original Invoice: The original invoice must be kept as proof of the date of first sale and the
Product serial number.The Warranty does not cover any Product if the Original Invoice appears to
have been modified or altered, or when the serial number on the Product appears to have
been altered or defaced.
Product Maintenance: It is the Customer’s responsibility to maintain the Product properly.
See your maintenance schedule and owner’s manual for details. The Warranty does not cover
an improperly maintainedProduct.
Non-PMC Components and Accessories: Non-PMC manufactured components and
accessories that are used in the operation of the Product are not covered by this Warranty. Such
components and accessories shall be subject to the warranty offered to the Customer, if
any, by the original manufacturer of such component or accessory.
Other Warranty Exclusions: The Warranty does not cover any Product that PMC determines
has been damaged or fails to operate properly due to misuse, negligence, abuse,
carelessness, neglect, or accident. By way of example only, this includes:
• Normal wear and tear.
• Improper or unauthorized installation, repair, alteration, adjustment or modification of
the Product.
• Use of heating devices, pumping equipment, dispensers, or other parts or accessories with
the Product that havenot been approved ormanufacturedby PMC.
• Use of airtool oil forlubricating the product
• Failure to follow the operating instructions and recommendations provided by PMC may
causelossordamagetopersonnel,equipment,orworkarea.
• Fire, flood, “acts of God,” or other contingencies beyond the control of PMC.

WARRANTY
2
THE WARRANTY DESCRIBED HEREIN IS THE EXCLUSIVE REMEDY FOR THE
CUSTOMER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS, IMPLIED,
STATUTORY OR OTHERWISE, AND THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ALL
OTHER WARRANTIES ARE HEREBYDISCLAIMED. TO THE FULLEST EXTENT PERMITTED
BY LAW, PMCSHALL NOT BE RESPONSIBLE, WHETHER BASED IN CONTRACT, TORT
(INCLUDING, WITHOUT LIMITATION, NEGLIGENCE), WARRANTY OR ANY OTHER
LEGAL OR EQUITABLE GROUNDS, FOR ANY CONSEQUENTIAL, INDIRECT,
INCIDENTAL, LOST PROFITS, SPECIAL, PUNITIVE OR EXEMPLARY DAMAGES,
WHETHER TO PERSON OR PROPERTY, ARISING FROM OR RELATING TO THE
PRODUCT, EVEN IF PMC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
LOSSES ORDAMAGES.
Non-Warranty Service by PMC: If PMC determines that the suspected Defect of the Product is not
covered by this Warranty, disposition of the Product will be made pursuant to the terms and
conditions of PMC’s written estimate on a time and materials bas is.
Continuing Warranty for Products Repaired or Replaced under Warranty: Following the repair
or replacement of a Product covered by this Warranty, such Product will continue to be subject
to the original Warranty for the remainder of original Warranty Period or for three (3) months
from the repair or replacement date, whichever is longer.
No Rights Implied: Nothing in the sale, lease or rental of any Product by PMC shall be
construed to grant any right, interest or license in or under any patent, trademark, copyright, trade
secret or other proprietary right or material owned by anyone; nor does PMC encourage the
infringement of same.
Exclusive Warranty: This writing is the final, complete, and exclusive expression of the
Warranty covering the Product. Any statements made by PMC, its employees or agents that
differ from the terms of this Warranty shall have no effect. It is expressly understood that
Customer’s acceptance of this Warranty, by performance or otherwise, is upon and subject
solely to the terms and conditions hereof, and any additional or different terms and conditions
proposed or expressed by Customer or anyone, whether in writing or otherwise, are null and void
unless specifically agreed to in writing by an Officer of PMC.

3
SAFETY AND HANDLING
This chapter contains important information on the safety, handling and use of your PX-7 Gun.
Before installing the PX-7 Gun and start-up, carefully read all
the technical and safety documentation included in this
manual. Pay special attention to the information in order to
know and understand the operation and the conditions of use
of the PX-7 Gun. All of the information is aimed at improving
user safety and avoiding possible breakdowns from the
incorrect use of the PX-7 Gun.
WARNING! Presents information to alert of a situation that
might cause serious injuries if the instructions are not
followed.
CAUTION! Presents information that indicates how to avoid damage
to the equipment or how to avoid a situation that could cause
injuries.
NOTE! Is relevant information of a procedure being carried out.
Careful study of this Manual will enable the operator to know the characteristics of the Gun and
the operating procedures. By following the instructions and recommendations contained, you
will reduce the potential risk of accidents in the installation, use or maintenance of the PX-7
Gun; you will provide a better opportunity for incident-free operation for a longer time,
greater productivity and the possibility of detecting and resolving problems fast and simply.
Keep this Service Manual for future reference to useful information. If you lose this Manual, ask
for a new copy from your PMC Service Center or go to the company website (www.polymac-
usa.com).
The PX-7 Gun has been designed and built for the application of polyurea chemical systems,
polyurethane foam chemical systems and some two-component epoxy systems.

SAFETY AND HANDLING
4
WARNING! The design and configuration of the PX-7 Gun
does not allow its use in potentially explosive atmospheres
or exceeding the pressure and temperature limits described
in the Technical Specifications of this Manual to be
exceeded.
Always use liquids and solvents that are compatible with the PX-7 Gun. If in doubt, consult PMC
Technical Service.
When working with the PX-7 Gun, it is recommended that the operator wear suitable clothing
and elements of personal protection, including, without limitation, gloves, protective goggles,
safety footwear and face masks. Use breathing equipment when working with the Gun in
enclosed spaces or in areas with insufficient ventilation. The introduction and follow-up of safety
measures must not be limited to those described in this Manual. Before beginning to work with
the Gun, a comprehensive analysis must be made of the risks derived from the products to be
dispensed, the type of application and the working environment.
To prevent possible injury caused by incorrect handling of the
materials and solvents used in the process, carefully read the
Material Safety Data Sheet (MSDS) provided by your supplier.
To avoid damage caused by the impact of pressurized fluids,
do not open any connection or perform maintenance work on
components subject to pressure until the pressure has been
completely eliminated.
Use suitable protection when operating, maintaining or being
present in the area where the equipment is functioning. This
includes, but is not limited to, the use of protective goggles,
gloves, shoes and safety clothing and breathing equipment.
The equipment includes components that reach high
temperatures and can cause burns. Hot parts of the equipment
must not be handled or touched until they have cooled
completely.
The equipment sprays high pressure fluids that can lead to
fluid being injected under the skin or eyes. Severe injury could
be incurred. Proper personal protective equipment should be
used in conjunction with training and situational awareness of
all personnel on the job.

5
TECHNICAL SPECIFICATIONS
Maximum Working Pressure:....................................................................3,500 psi (245 Bar)
Air Pressure:......................................................................................................... 90-125 psi (6.2-8.6 Bar)
Weight (Not including Coupling Block):................................................................. 4.3 lbs (2.0 kg)
Weight (Including Coupling Block):........................................................................ 5.0 lbs (2.3 kg)
Figure 1: PX-7 Dimen sions
Flow Rates of Spray Modules
MODULE #
MODULE KIT
PART #
PRESSURE
(PSI)
OUTPUT
(LB/MIN)
PATTERN DIA.
(IN)
#1 Round
200547
1000
22
22
#3 Round
200549
1000
12
12
#5 Round
200551
1600
16
14

6
GENERAL DESCRIPTION
Figure 3: PX-7 Side View
Figure 2 : PX-7 Overview

7
OPERATION
CAUTION! When working with the
PX-7 Gun or performing
maintenance work, wear suitable
safety protection in accordance
with the recommendations and
specifications provided by the product
suppliers.
1. Set the Safety Stop to the LOCKED
position (see Figure 4).
2. Install hose to the Coupling Block (see Figure 5).
NOTE! The material delivery hoses are color coded
Red and Blue. The Red corresponds to the Isocyanate
(A) and the Blue to the Polyol (R). To avoid connection errors,
the (A) and (B) hoses have connections with different sizes to
avoid incorrect connections.
3. Ensure the Manual Valves are CLOSED by turning them to the full
clockwise position using supplied 5/16” nut driver. (see Figure 6).
CAUTION! Excessive force closing or opening the Manual
Valves may result in damage to the Manual Valves and/or
Coupling Block. Never use a socket wrench to close the
manual valves.
4. Ensure the Coupling Block Gaskets are installed in the
Gun Block. Replace if necessary (see Figure 7).
5. Connect the Coupling Block to the Gun Block using the
Nut Driver provided. Tighten the Coupling Block until
there is a hand tight seal.
6. Connect the Air Hose to the Air Inlet at the back of the
Gun, and then connect the Air Hose to the Supply Air
Hose. Alternatively, remove the Pipe Plug from inside
the Gun Handle and replace with the supplied Pipe
Extension. Connect the Air Hose and Adapter to the
Pipe Extension, and then connect the Air Hose to the
Supply Air Hose (see Figure 8).
Figure 4: Safety Stop
Figure 5 : Coupling
Block Hose Installation
Figure 6: Closing
Manual Valves
Figure 7 : Coupling Block
Gaskets