Henkel OSI - User Manual

Technical Bulletin
Henkel TCS Department
26235 First Street
Westlake, OH 44145
1-800-624-7767
Technical Bulletin - OSI Foam Applicator Gun – 20171003 Page 1 of 3
OSI® Foam Applicator Gun Best Practices
CAUTION: Do not point the applicator gun at people or animals. Always wear eye protection, gloves and protective clothing. Avoid damage to
existing materials in replacement situations. Use a drop cloth to protect work area at all times.
Instructions for Use:
1. Shake can well 15 to 20 times prior to attaching the gun. Align canister and gun. Screw black collar of canister onto the basket adapter of the
gun by hand until snug, being careful not to cross-thread the unit. Do not over tighten. NOTE: It is important to align threads properly to
prevent possible leakage
2. Shake can well before use and during any work interruptions. Note: In colder temperatures we also recommend occasional shaking during
use to ensure consistent flow. Keep product temperature above 45° F for maximum performance and best flow rate.
3. Aim gun into an appropriate receptacle such as a box or bag or on a disposable surface to test flow rate. Pull trigger to start the flow of foam.
4. Adjust the control knob (release valve) on rear of gun to regulate flow. Clockwise decreases flow, counterclockwise increases the flow
5. Do not store gun with empty canister on the gun. When changing canister, replace empty can immediately to avoid hardening or clogging of
foam in the applicator gun.
Maintenance and Cleaning:
1. A partially used can may be left on the applicator gun between jobs when the release valve is fully closed (full clockwise), but no longer than
30 days’ maximum. It is not necessary to clean the applicator gun until the canister is removed. When not in use, ensure that the release
valve is in the closed position (full clockwise) to avoid foam curing up inside the gun. Temporary storage must always have a pressurized foam
can attached to the gun. Never remove a partially used/dispensed can as they are pressurized.
2. Completely emptied cans must be replaced immediately. Clean the applicator gun thoroughly as soon as possible after the canister is
removed if no replacement can be available to avoid the foam hardening inside the applicator gun. Once the foam has cured, cleaners will not
work or dissolve the polyurethane foam.
3. Use OSI® Foam Clean, pressurized cleaning solvent, to clean gun or use OSI® Foam Clean with button actuator on its valve stem for spot
cleaning and the clean up of uncured foam when changing cans. Always CLEAN “basket adapter” completely of any residual foam material
before replacing. Use petroleum jelly lubricant on the basket adapter to prevent over- tightening
4. Screw OSI® Foam Cleaner canister onto the applicator gun. Spray the cleaner onto a disposable surface or into a container for 3-5 seconds.
Open release valve partially (counterclockwise, but do not unscrew the value from the gun). Spray again for 3-5 seconds and repeat as
necessary.
5. For Long term storage: Leave solvent in the applicator gun for 2 minutes. Spray for another 3-5 seconds to remove used solvent from the
applicator gun. Repeat this process until the solvent spray out is completely clean. Remove the OSI® Foam Cleaner canister from gun.
Release pressure by pulling trigger then close regulator valve. Use petroleum jelly on nozzle tip and basket before storing applicator.
6. If necessary, with no can attached, unscrew the regulator knob and remove the needle. Clean the needle with a non-abrasive rag wet with
cleaning solvent.
7. Grease the needle with petroleum jelly lubricant before replacing in the applicator gun. BE CAREFUL not to lose the parts as they cannot be
replaced.
8. Routinely clean the screw-on brass tip to keep it completely free of hardened foam. Spray OSI® Foam Cleaner into the brass tip’s cavity. If
foam has cured inside the brass tip, use a probe to break apart and remove the cured foam to maintain a clear path for the foam to travel.
Warning: Do not completely unscrew release valve from the foam gun while connected to a PU foam or cleaner canister. Back pressure may cause
the valve to fly off from the gun and cause harm.
Helpful Hint: Squeeze trigger when unscrewing an empty can, in order to depressurize dispensing unit (point dispensing unit into appropriate waste
receptacle). This will help to prevent backflow of material from the basket adapter
1. Holding the trigger open during the entire can changing process will help to prevent backflow of material from the basket adapter.

Summary

Instructions for Use

Can Attachment and Initial Flow Test

Shake can, align, screw collar, and test flow. Align threads properly to prevent leakage.

Flow Adjustment and Storage

Adjust control knob for flow. Do not store gun with empty canister; replace immediately.

Maintenance and Cleaning Procedures

Temporary Storage and Valve Position

Partially used cans can remain attached for max 30 days with valve closed. Never remove pressurized cans.

Cleaning Uncured Foam

Use OSI® Foam Clean solvent to clean the gun and basket adapter of uncured foam promptly.

Long-Term Storage and Needle Care

Clean gun with solvent, remove needle if needed, lubricate needle and brass tip for storage.

Troubleshooting Common Issues

No Product Extrudes

Check can, temperature, valve position, shelf life, and dispenser.

Trigger Will Not Depress

Ensure regulating screw is open and check needle valve for blockage or damage.

Properties of Dispensed Product Unacceptable

Address splitting, uneven dispensing, or backflow by checking valve, needle, and can condition.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

This document describes the OSI® Foam Applicator Gun, a device designed for dispensing polyurethane (PU) foam from pressurized canisters. It provides detailed instructions for use, maintenance, and troubleshooting to ensure optimal performance and longevity of the tool.

Function Description:

The OSI® Foam Applicator Gun is a handheld tool used to precisely dispense PU foam from a pressurized canister. It features a basket adapter for attaching the foam can, a trigger for controlling foam flow, and a control knob (release valve) on the rear to regulate the flow rate. The gun is designed to provide consistent foam application and is suitable for various sealing, filling, and insulating tasks. Its primary function is to facilitate controlled and efficient application of foam, minimizing waste and ensuring proper curing.

Important Technical Specifications:

While specific technical specifications like dimensions or materials are not explicitly listed, the document implies several important characteristics:

• Temperature Range: For optimal performance and best flow rate, the product (foam canister) temperature should be kept above 45°F (7°C). Cans should ideally be stored between 65-75°F (18-24°C) prior to use. Heating cans with local heat sources (stove, radiators, hot plates, etc.) is explicitly prohibited.
• Storage Duration: A partially used can can be left on the applicator gun for a maximum of 30 days, provided the release valve is fully closed.
• Compatibility: The gun is designed for use with OSI® Foam canisters and OSI® Foam Clean pressurized cleaning solvent.
• Pressure System: The device operates with pressurized foam cans, and warnings are given regarding the handling of pressurized units, such as not removing a partially used/dispensed can while it is pressurized and not completely unscrewing the release valve when connected to a canister due to back pressure.

Usage Features:

• Canister Attachment: Cans are attached by screwing the black collar of the canister onto the basket adapter of the gun by hand until snug, ensuring proper alignment to prevent cross-threading and leakage.
• Flow Control: The control knob (release valve) on the rear of the gun regulates foam flow. Turning clockwise decreases flow, while counterclockwise increases it.
• Testing Flow Rate: Before application, users are instructed to aim the gun into a receptacle (box, bag, or disposable surface) to test the flow rate.
• Canister Replacement: Empty cans must be replaced immediately to prevent foam hardening and clogging. When changing canisters, squeezing the trigger while unscrewing an empty can helps depressurize the unit and prevent backflow. Holding the trigger open during the entire can changing process also helps prevent backflow.
• Vertical Dispensing: To ensure proper mixture and emptying of the can, it is crucial to keep the can in a vertical position with the valve down during dispensing. Spraying when the can is horizontal or upside down is not recommended.
• Shaking: Cans should be shaken well (15-20 times) prior to attaching the gun and before use. Occasional shaking during use is also recommended, especially in colder temperatures or when experiencing "spitting" or gas loss, to ensure consistent flow and proper mixing.
• Safety: Users are warned not to point the gun at people or animals and to always wear eye protection, gloves, and protective clothing.

Maintenance Features:

• Cleaning After Use: The applicator gun does not need to be cleaned until the canister is removed. However, once a canister is removed, the gun should be cleaned thoroughly as soon as possible, especially if no replacement can is available, to prevent foam hardening. Cured foam cannot be dissolved by cleaners.
• Cleaning Solvent: OSI® Foam Clean, a pressurized cleaning solvent, is used to clean the gun and for spot cleaning uncured foam.
• Basket Adapter Cleaning: The basket adapter must be completely cleaned of any residual foam material before replacing a can. Petroleum jelly lubricant should be applied to the basket adapter to prevent over-tightening.
• Cleaning Procedure: To clean, screw the OSI® Foam Cleaner canister onto the gun, spray cleaner onto a disposable surface for 3-5 seconds, open the release valve partially, spray again for 3-5 seconds, and repeat as necessary until the spray is clean.
• Long-Term Storage: For long-term storage, leave solvent in the applicator gun for 2 minutes, then spray until the solvent spray is completely clean. Remove the cleaner canister, release pressure by pulling the trigger, close the regulator valve, and apply petroleum jelly to the nozzle tip and basket.
• Needle Cleaning: If necessary (with no can attached), the regulator knob can be unscrewed to remove and clean the needle with a non-abrasive rag wet with cleaning solvent. The needle should then be greased with petroleum jelly before re-inserting. Users are cautioned not to lose these small parts.
• Brass Tip Cleaning: The screw-on brass tip should be routinely cleaned to keep it free of hardened foam. OSI® Foam Cleaner can be sprayed into its cavity. If foam has cured inside, a probe can be used to break apart and remove it.
• Storage with Can Attached: The dispensing unit should always be stored with a can still attached. For short-term storage, the gun safety knob should be turned completely clockwise (closed position).
• Troubleshooting: The document provides solutions for common issues such as no product extrusion, slow extrusion, trigger not depressing, and unacceptable product properties (e.g., "spitting" or open-celled appearance). Solutions often involve cleaning, adjusting the regulating screw, shaking the can, or replacing the gun if internal parts are clogged or worn.

Henkel OSI Specifications