User manual | DeVilbiss GTI-HD Suction and Pressure feed spray gun Technical Bulletin

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The GTI-HD Suction and Pressure feed spray gun is a professional quality gun designed with high volume, low pressure (HVLP) technology or EPA compliant, Trans-Tech® technology. The GTI-HD is suitable for a wide range of paints, dyes, stains, glazes and lacquers.

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DeVilbiss GTI-HD Suction and Pressure feed Technical Bulletin | Manualzz

EN

Technical Bulletin

GTI–HD range of Suction and Pressure feed Spray

Guns

,

SB-E-2-831 ISS.04

Table of Contents

Topic

EC Declaration of Conformity

Part Numbers

Operational Description

Kit contents

Construction Features

Materials of Construction

Specifications & Technical Data

Safety Precautions

Parts List

Exploded parts View

Installation, Operation, Preventive Maintenance & Cleaning

Parts Replacement/Maintenance

Page

3

3

3

4

4

4

4

5

6

7

8

9

A. Servicing Air Valve

B. Replacing Air Valve

9

10

C. Needle Packing, Fluid Insert, Spreader Valve Assembly 11

12 D. Spray Head Seal

E. Fluid Inlet Seal and Suction Cup maintenance

F. Chart 1 – Air Caps, Chart 2 – Fluid Nozzles &

Fluid Needles

Troubleshooting Possible Problems in Operation

Accessories

Warranty

13

14

15

17

17

2

© 2010 ITW Finishing Systems and Products

EC Declaration of Conformity

We, ITW Finishing UK, Ringwood Rd, Bournemouth, Dorset, BH11 9LH, UK, as the manufacturer of the Spray gun model GTiS-HD and GTiP-HD declare, under our sole responsibility, that the equipment to which this document relates is in conformity with the following standards or other normative documents:

BS EN 292-1 PARTS 1 & 2: 1991, BS EN 1953: 1999; and thereby conform to the protection requirements of Council Directive 98/37/EEC relating to Machinery Safety Directive, and;

EN 13463-1:2001, council Directive 94/9/EC relating to Equipment and Protective

Systems intended for use in Potentially Explosive Atmospheres protection level II 2 G X.

This product also complies with the requirements of the EPA guidelines, PG6/34. Transfer efficiency certificates are available on request.

B. Holt, Vice President

1st Dec 2008

ITW Finishing Systems and Products reserve the right to modify equipment specification without prior notice.

Part Numbers

The ordering code for the for GTi-HD Suction and Pressure range of Sprayguns is; e.g. GTI S HD-H1-16 where;

H1 = H1 Aircap. Alternatives are T1, T2 and T3

Suction feed. Alternative is P for pressure

16 Nozzle. See chart 2 p14 for available sizes

S =

16 =

Operational Description

This GTI-HD Spray Gun is a professional quality gun designed with both high volume, low pressure (HVLP) technology or EPA compliant, Trans-Tech

®

technology. The GTI-HD is suitable for a wide range of paints, dyes, stains, glazes and lacquers.

IMPORTANT

: These Sprayguns are suitable for use with both waterbased and solvent based coating materials. These guns are not designed for use with highly corrosive and/or abrasive materials and if used with such materials it must be expected that the need for cleaning and/or replacement of parts will be increased. If there is any doubt regarding the suitability of a specific material, contact your DeVilbiss Distributor or DeVilbiss direct.

NOTE: This gun is not to be used with halogenated hydrocarbon solvents or cleaning agents such as 1,1,1,-Trichloroethane or methylene chloride. These solvents can react with the aluminium components used in this gun and cup. The reaction can become violent and lead to an equipment explosion.

© 2010 ITW Finishing Systems and Products

3

Kit contents (all models)

1 GTI- HD Suction or Pressure Feed Spraygun

1 TGC 1 litre Suction feed Cup (Suction models only)

1 Cup Filter (Suction models only)

1 Set of 4 coloured identification rings

1 Spanner (10mm and 14mm A/F)

1 Torx/Flat blade screwdriver

1 Cleaning Brush

1 Service bulletin

Construction Features

1 Air Cap (nickel plated brass for long durability)

4 Fluid Needle (grooved stem for easy removal)

10

11

3 Fluid Nozzle (ideal for automotive topcoat systems) 12

13

14

15

Fan Air Adjustment (stepless regulation for fan to round spray)

Fluid Adjustment (stepless regulation of fluid volume)

Removable Spray Head (for long gun service life)

Interchangeable Colour ID System (4 coloured rings supplied)

Anodised, forged aluminium gun body

(ergonomic, good looking & durable, easy to clean)

1 litre Aluminium Suction Cup (Suction models only)

16 Cup Lid with Drip Free diaphragm

8 Trigger (ergonomic for comfort)

9 Trigger Stud & Screw (easy replacement design)

17

18

Air Valve (design offers low pull force & low pressure drop)

Gun acceptable for waterborne and solvent borne applications

Cup

Materials of Construction

Gun Body

Air Cap,

Fluid Nozzle, Fluid Needle, Fluid Inlet, Trigger Stud

Spray Head

Springs, Clips, Screws

Seals, Gaskets

Trigger

Air Inlet, Body Bushing, Spreader Valve Body, Air Valve Nut,

Air Cap Retaining Ring, Knobs

Air Valve Assembly

Anodised aluminium

Nickel plated brass

Stainless steel

Anodised aluminium

Stainless steel

Solvent resistant materials

Chrome plated steel

Chrome plated brass

Stainless Steel, HPDE

Aluminium Cup, Lid and tube, Composite resin

Cam

Specifications & Technical Data

Air Supply Connection

Maximum Static Air Inlet Pressure

Maximum Static Fluid Inlet Pressure

Fluid Supply Connection

Service Temperature

Gun Weight (gun only)

(cup only)

Universal 1/4" (fits ¼” BSP and 1/4" NPS male)

P1 = 12 bar (175 psi)

P2 = 14 bar (203 psi)

Universal 3/8" (fits 3/8” BSP and 3/8” NPS male)

0 to 40°C (32 to 104°F)

650g

420g

4

© 2010 ITW Finishing Systems and Products

SAFETY WARNINGS

Fire and explosion

Solvents and coating materials can be highly flammable or combustible when sprayed.

ALWAYS refer to the coating material supplier’s instructions and COSHH sheets before using this equipment.

Users must comply with all local and national codes of practice and insurance company requirements governing ventilation, fire precautions, operation and house-keeping of working areas.

This equipment, as supplied, is NOT suitable for use with Halogenated Hydrocarbons.

Static electricity can be generated by fluid and/or air passing through hoses, by the spraying process and by cleaning non-conductive parts with cloths. To prevent ignition sources from static discharges, earth continuity must be maintained to the spray gun and other metallic equipment used. It is essential to use conductive air and/or fluid hoses.

Personal Protective Equipment

Toxic vapours – When sprayed, certain materials may be poisonous, create irritation or be otherwise harmful to health. Always read all labels, safety data sheets and follow any recommendations for the material before spraying. If in doubt, contact your material supplier.

The use of respiratory protective equipment is recommended at all times. The type of equipment must be compatible with the material being sprayed.

Always wear eye protection when spraying or cleaning the spray gun.

Gloves must be worn when spraying or cleaning the equipment.

Training – Personnel should be given adequate training in the safe use of spraying equipment.

Misuse

Never aim a spray gun at any part of the body.

Never exceed the maximum recommended safe working pressure for the equipment.

The fitting of non-recommended or non-original spares may create hazards.

Before cleaning or maintenance, all pressure must be isolated and relieved from the equipment.

The product should be cleaned using a gun-washing machine, and should be removed and dried immediately after cleaning is completed. Prolonged exposure to cleaning solutions can cause damage to the product.

Noise Levels

The A-weighted sound level of spray guns may exceed 85 dB (A) depending on the setup being used. Details of actual noise levels are available on request. It is recommended that ear protection is worn at all times when spraying.

Operating

Spray equipment using high pressures may be subject to recoil forces. Under certain circumstances, such forces could result in repetitive strain injury to the operator.

© 2010 ITW Finishing Systems and Products

5

11 Spray Head & Seal Kit

*12 Body Bushing Seal

13 Body Bushing

14 Body Bushing & Seal

15 Fluid Needle

*16 Needle Spring

*17 Needle Spring Pad

18 Fluid Adjusting Knob

19

Fluid Adjusting Knob,

Spring & Pad Kit

*20 Retaining Clip

21 Spreader Valve Body

*22 Spreader Valve Seal

23

Spreader Valve

Adjusting Knob

*24 Spreader Valve Pin

25

Spreader Valve

Assembly

*26 Needle Packing

*27 Packing Spring

28 Packing Nut

29

Packing, Spring &

Packing Nut Kit

30 Air Valve Body

31 Air Valve Cage

32 Air Valve Poppet

33 Air Valve Spring

34 Air Valve Spring Pad

35 Air Valve Seal

REF.

No.

DESCRIPTION

1 Air Cap Retaining Ring

3 Air Cap

4 Air Cap Retaining Clip

6 Aircap & Ring

8 Fluid Nozzle

9 Spray Head

PARTS LIST

PRO-405-K

-

JGA-156-K5

See chart 1 p14

See chart 2 p14

-

SN-18-1-K2

SN-17-1-K

-

-

SN-6-K

See chart 2 p14

-

-

-

PRO-3-K

-

-

-

-

-

PRO-404-K

-

-

-

SN-404-K

-

-

-

-

-

SN-34-K5

1

1

1

1

1

1

1

1

1

2

1

2

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

PART NO. QTY

REF.

No.

DESCRIPTION PART NO.

36 Air Valve Assembly

*37

Trigger Stud Screw

(T20 TORX)

38 Trigger

*39 Trigger Stud

40

Trigger, Stud &

Screw Kit

42 Air Inlet

43

Colour ID Ring Kit (4

Colours)

44 Airflow Valve

45 Circlip

46 Valve Head

47 Washer

48 Valve Body

SN-402-K

-

-

-

SN-21-K

SN-40-K

SN-26-K4

PRO-411-K

-

-

-

-

49 Valve Stem

50 Baffle plate

51 Stud and Screw kit

52

Air valve Service

Tool

53 Torx Key

54 Fluid Inlet Connector

55 Lock Nut

-

SN-41-K

SN-405-K5

-

SPN-8-K2

-

-

56 Seal -

57

Fluid Inlet Connector

Kit

PRO-12-K

Suction Cup Models only

KR-566-1-B 58 Suction Cup

59

60

Cup Lid Gasket - kit of 3

Drip Check

Diaphragm- Kit of 5

KR-11-K3

KR-115-K5

61 Filter – Kit of 10 KR-484-K10

62 Lid Assembly

63 Cup

KR-4001-B

KR-466-K

SERVICE PARTS

PRO-415-1

QTY

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

GTI-428-K5

For accessories, see page 17

6

© 2010 ITW Finishing Systems and Products

© 2010 ITW Finishing Systems and Products

7

PATENT GB2417544

INSTALLATION

For maximum transfer efficiency, do not use more pressure than is necessary to atomise the material being applied. NOTE: when using the H1, HVLP

setup do not exceed 2 bar inlet pressure.

1.

Connect the gun to a clean, moisture and oil free air supply using a conductive hose, of at least 8 mm I.D.

NOTE

Depending on hose length, larger I.D. hose may be required. Install an air gauge at the gun handle. When gun is triggered on, adjust regulated pressure to 2.0 bar. Do not use more pressure than is necessary to atomise the material being applied. Excess pressure will create additional overspray and reduce transfer efficiency.

NOTE

If quick connect couplings are required, use only high flow quick connects approved for HVLP use. Other types will not flow enough air for correct gun operation.

NOTE

If an air adjusting valve is used at the gun inlet, use DGIPRO-502-bar Digital Gauge. Some competitive adjusting valves have significant pressure drop that can adversely affect spray performance. The DGI Digital Gauge has minimal pressure drop, which is important for

HVLP spraying.

2. SUCTION MODELS ONLY. Attach the cup lid assembly (62) to the fluid inlet connector (54).

Position the yoke at right angles to the gun with the cam lever to the front (see picture). Make sure the vent hole in drip free diaphragm (60) is

180° to the lid vent hole. The position of the Drip

Free Valve (63) is not important.

3. PRESSURE FEED MODELS. Connect the fluid supply hose to Fluid inlet Connector (54).

NOTE

Before using the spraygun, flush it with solvent to ensure that the fluid passages are clean.

OPERATION (

SUCTION MODELS

)

1. Mix coating material to manufacturer’s instructions and strain material.

2. Fill the cup to no more than 20 mm from the top of the cup. DO NOT OVERFILL.

3. Attach to Cup Lid.

ALL MODELS

4. Turn fluid adjusting knob (18) clockwise to prevent fluid needle movement.

5. Turn spreader valve adjusting knob (23) counter clockwise to fully open.

6. Adjust inlet air pressure to 2.0 bar.

7. Turn fluid adjusting knob counter clockwise until first thread shows.

8. Test spray. If the finish is too dry, reduce airflow by reducing air inlet pressure.

9. If finish is too wet, reduce fluid flow by turning fluid adjusting knob (18) clockwise. If atomisation is too coarse, increase inlet air pressure. If too fine, reduce inlet pressure.

10. The pattern size can be reduced by turning spreader valve knob (23) clockwise.

11. Hold gun perpendicular to surface being sprayed. Arcing or tilting may result in uneven coating.

12. The recommended spray distance is 150-200 mm.

13. Spray edges first. Overlap each stroke a minimum of 75%. Move gun at a constant speed.

14. Always turn off air supply and relieve pressure when gun is not in use.

PREVENTIVE MAINTENANCE &

CLEANING

To clean air cap and fluid nozzle, brush exterior with a stiff bristle brush. If necessary to clean cap holes, use a broom straw or toothpick if possible. If a wire or hard instrument is used, extreme care must be used to prevent damaging the holes which will cause a distorted spray pattern.

To clean fluid passages, remove excess material from cup, or disconnect hose for pressure models, then flush with gun wash solution. Wipe the gun exterior with a dampened cloth. Never completely immerse in any solvent or cleaning solutions as this is detrimental to the lubricants and life of the spray gun.

NOTE

When replacing the fluid nozzle or fluid needle, replace both at the same time. Using worn parts can cause fluid leakage. See page 14, Chart 2. Also, replace the needle packing at this time. Torque the fluid nozzle to 14–16 nm. Do not over tighten.

CAUTION

To prevent damage to fluid nozzle (8) or fluid needle (15), be sure to either 1) pull the trigger and hold while tightening or loosening the fluid nozzle, or 2) remove fluid adjusting knob (18) to relieve spring pressure against needle collar.

SUCTION CUP

. Empty excess material and clean the cup. Make sure the vent holes in the Diaphragm

(60) and the lid (63) are clear.

8

© 2010 ITW Finishing Systems and Products

Parts Replacement/Maintenance

AIR VALVE INSTRUCTIONS

Servicing Air Valve

Reasons to service air valve:

A) Air valve not functioning correctly (may need cleaning).

B) Routine maintenance.

C) Air leaks (advise replacement, see p10)

1. Remove trigger using the tool supplied (SPN-8) or

TORX T20 key. (See fig 1 & 2)

2. Unscrew air valve using SN-28 (14 mm) spanner.

(See fig 3)

3. Remove air valve by gripping stem. (See fig 4)

4. Remove spring with spring pad. (See fig 5)

5. DO NOT REMOVE REAR SEAL (35) FROM GUN

BODY. (See fig 6)

6. DO NOT REMOVE PLASTIC CAGE FROM AIR

VALVE BODY AS THIS MAY DAMAGE THE CAGE.

(See fig 7)

7. CLEAN a. Remove all paint build up. (See fig 8) b. The 4 poppet holes must be clear. (See fig 9) c. Stem must be free to float in poppet. (See fig 10) d. Stem must slide through cage bore with slight resistance (due to seal). e. Rear seal must look clean and in position in the bore. (See fig 6) f. If any of the above cannot be rectified, replace the air valve (See Replacing Air Valve p10).

8. Replace spring ensuring the end with the plastic bearing pad goes in first. (See fig 5)

9. Insert air valve assembly into gun and carefully feed over the spring and through the rear seal. (See fig 11)

10. Tighten air valve assembly using fingers first, and then tighten with SN-28 (14mm) Spanner. (See figs 12 & 3)

11. Replace trigger. (See figs 2 & 1)

12. If there is an air leak through the gun, the air valve may need replacing (See Replacing Air Valve).

© 2010 ITW Finishing Systems and Products

9

Replacing Air Valve

Reasons to replace air valve:

A) Air leak through the gun.

B) Air valve not operating correctly.

1. Remove trigger using SPN-8 or TORX (T20) key provided in the kit. (See figs 13 & 14)

2. Unscrew air valve using SN-28 (14 mm) Spanner. (See fig 15)

3. Remove air valve by gripping the stem. (See fig 16)

4. Remove spring with spring pad. (See fig 17)

5. Hook out rear seal using Service Tool (56). (See figs

18 & 19)

6. Clean air valve bores in gun body with the brush supplied in the kit.

7. Place new rear seal onto Service tool (56); grooves must fit in service tool form. (See fig 20)

8. Push rear seal firmly into hole up to shoulder, using

Service tool. (See figs 21 & 22)

9. Insert new spring, ensuring the end with the plastic bearing pad goes in first. (See fig 17)

10. Insert air valve assembly into gun and carefully feed over the spring and through the rear seal. (See fig 23)

11. Tighten air valve assembly using fingers first, then tighten with SN-28 (14 mm) Spanner. (See figs 24 &

15)

12. Replace trigger. (See figs 14 & 13)

10

© 2010 ITW Finishing Systems and Products

Parts Replacement/Maintenance

NEEDLE PACKING

REPLACEMENT INSTRUCTIONS

13. Remove trigger using SPN-8 or TORX (T20) driver.

(See figs 25 & 26)

14. Remove fluid adjusting knob and needle spring with spring pad from gun. (See figs 27 & 28)

15. Remove fluid needle from gun body. (See fig 29)

16. Loosen and remove packing nut using SPN-8 Key or a straight blade screwdriver. (See figs 30 & 31)

17. Discard old packing and packing spring if replacing.

Clean packing if reusing. Also clean packing spring and nut. (See fig 32).

18. Re-assemble the packing, (See fig 32). Assemble into gunbody by hand (see fig 33) and then tighten.

(See figs 30 and 31)

19. Insert fluid needle all the way into gun body seating in fluid nozzle (See fig 34).

20. Insert needle spring, spring pad, and fluid adjusting knob. (See figs 28 & 27). Reinstall trigger. (See figs

25 & 26).

21. Trigger gun fully and screw in fluid adjusting knob until it stops. Back it off 1/2 turn and gun will have full needle travel.

22. Trigger gun several times to verify correct operation.

SPREADER VALVE ASSEMBLY

REPLACEMENT/MAINTENANCE

The spreader valve assembly can be replaced if damaged. Remove using SN-28 (14 mm) Spanner (See figs 35 & 36). The internal seal can be replaced and is included in the GTI PRO Gun Rebuild Kit.

© 2010 ITW Finishing Systems and Products

11

Parts Replacement/

Maintenance

SPRAY HEAD SEAL

REPLACEMENT

1. Remove air cap and retaining ring. (See fig 37)

2. Remove fluid adjusting knob, spring, and spring pad.

(See figs 38 & 39)

3. Remove fluid needle from gun body. (See fig 40)

4. Remove fluid nozzle using SN-28 (10 mm) ring

Spanner, and the Front Plate. (See figs 41, 42 & 43)

5. Remove Spray Head. (See fig 44).

6. Clean Spray Head with a soft brush (See fig 45).

7. Remove Spray Head seal using a small screwdriver or pick. (See fig 46)

8. Clean front of gun if required, using a soft brush, as well as the Spray Head, fluid nozzle, air cap, and retaining ring. (See fig 47)

9. Place a new Spray Head Seal onto the front of the gun, making sure the flat on the seal is aligned with the flat in the gun. (See fig 48).

10. Fit the Front Plate onto the Spray Head, fit Spray Head to the Gunbody, ensuring the flat on the underside of the Spray Head locates with the flat in the Gun Body.

Fit Fluid Nozzle, Air Cap, and Retaining Ring. Torque the Fluid Nozzle to 14–16 nm. Don’t over torque the fluid nozzle. (See figs 44, 43, 42, 41 and 37)

11. Insert Fluid Needle all the way into the Gun Body, seating in the Fluid Nozzle. (See fig 40)

12. Reassemble Needle Spring, Spring Pad, and Fluid adjusting Knob. (See figs 39 & 38)

13. Trigger gun fully and screw in Fluid Adjusting Knob until it stops. Back it off 1/2 turn and gun will have full needle travel.

14. Trigger gun several times to verify correct operation

.

12

© 2010 ITW Finishing Systems and Products

Parts Replacement/

Maintenance

FLUID INLET SEAL

1. Loosen Locknut (55) with 18mm Spanner (see Fig 49).

2. Unscrew Fluid Inlet Adaptor (54) with 8mm Hex Key

(see fig 50)

3. Remove Fluid Inlet Adaptor (see fig 51).

4. Remove seal (56) and replace with new Seal (see fig

52).

5. Replace Fluid Inlet Adaptor (see Fig 51).

6. Tighten with 8mm Hex Key (see Fig 50).

7. Tighten Lock Nut (55) with 18mm Spanner (see Fig 49).

SUCTION CUP LID

1. Remove drip free diaphragm (60). Clean or replace.

Make sure the vent hole is kept clear. (See Fig 53).

2. Remove Cup Gasket (59) (see Fig 54).

3. Make sure the vent hole in the lid (62) is clean and not blocked. (See Fig 55).

4. It is recommended to replace the Cup Gasket (59) with a new one to avoid Cup leaks (see Fig 56).

5. Re-fit the Drip Free Diaphragm. Position the vent hole in the Diaphragm 180° away from the Vent hole. (see

Fig 57).

© 2010 ITW Finishing Systems and Products

13

Parts Replacement/Maintenance

Chart 1 – Air Caps

SPRAYGUN PART No. FOR

AIR CAP

TECHNOLOGY MARKING ON

AIR CAP

RECOMMENDED

INLET

PRESSURE

(bar)

2.0

AIR FLOW

(L/min) @ 2 bar

PRO-100-H1-K

PRO-100-T1-K

HVLP

TRANS-TECH

®

TRANS-TECH

®

H1

T1 2.0

450

280

GTI-HD

PRO-100-T2-K T2 2.0 350

PRO-100-T3-K TRANS-TECH

®

T3 2.0 300

NOTE: When removing air cap from retaining ring, don’t remove the Slip Ring (2) or Retaining Ring Seal (5) from the Retaining Ring. Damage to the parts may occur. Slip ring and Retaining Ring seal are not available as replacements. Simply wipe parts clean and reassemble with new or clean air cap.

Chart 2 – Fluid Nozzle Range & Fluid Needle

SPRAYGUN PART No. ON FLUID NOZZLE PART No. NEEDLE

GTI S HD

PRO-200-16-K

PRO-200-18-K

PRO-200-20-K

PRO-315-K

GTI P HD

PRO-205-085-K

PRO-205-10-K

PRO-205-12-K

PRO-205-14-K

PRO-305-085-10-K

PRO-305-12-14-K

PRO-200-16-K

PRO-200-18-K PRO-315-K

PRO-200-20-K

NOTE: When replacing the fluid nozzle or fluid needle, replace both at the same time. Torque to 18–20 nm (13–15 ft-lbs). Don’t over tighten the fluid nozzle. Use SN-28 10mm Spanner supplied with the gun and check with a torque wrench.

14

© 2010 ITW Finishing Systems and Products

CONDITION

Troubleshooting Possible Problems in Operation

Heavy top or bottom pattern

Heavy right or left side pattern

CAUSE

Horn holes plugged.

Obstruction on top or bottom of fluid nozzle.

Cap and/or nozzle seat dirty.

Left or right side horn holes plugged.

Dirt on left or right side of fluid nozzle.

CORRECTION

Clean. Ream with non-metallic point.

Clean.

Clean.

Clean. Ream with non-metallic point.

Clean.

Remedies for the top-heavy, bottom-heavy, right-heavy, and left-heavy patterns:

1. Determine if the obstruction is on the air cap or the fluid nozzle. Do this by making a test spray pattern. Then, rotate the cap one-half turn and spray another pattern. If the defect is inverted, obstruction is on the air cap.

Clean the air cap as previously instructed. Also check for dried paint just inside the cap center hole opening; remove by washing with solvent.

2. If the defect is not inverted, it is on the fluid nozzle. Clean nozzle. If problem persists, renew nozzle.

Heavy centre pattern

Spreader adjustment valve set too low.

Atomising pressure too low.

Material too thick.

Turn out counter clockwise to achieve correct pattern.

Increase pressure.

Thin to correct consistency.

Split spray pattern

Jerky or fluttering spray

Paint bubbles in cup

Fluid leaking or dripping from cup lid

Air pressure too high.

Fluid adjusting knob turned in too far.

Spreader adjusting valve set too high.

Loose or damaged fluid nozzle/seat

Loose or broken cup fluid nipple

Material level too low

Container tipped too far

Obstruction in fluid passage

Loose fluid needle packing nut

Damaged fluid needle packing

Fluid nozzle not tight.

Cup lid loose.

Damaged Cup Lid Gasket

Fluid leaking from vent hole

Reduce at regulator or gun handle.

Turn out counter clockwise to achieve correct pattern.

Turn in clockwise to achieve correct pattern.

Tighten or replace

Tighten or replace cup

Refill

Hold more upright

Back flush with solvent

Tighten

Replace

Fluid nozzle not tight. Tighten to

14–16 nm (10-12 ft-lbs).

Tighten Cup Lid.

Replace Cup lid Gasket

Clean drip free diaphragm

© 2010 ITW Finishing Systems and Products

15

Troubleshooting Possible Problems in Operation (cont)

Starved spray pattern

Inadequate material flow

Blocked vent in Cup lid

Low atomisation air pressure

Wind fluid adjusting knob out or change to larger fluid nozzle size

Clean lid and unblock vent

Increase air pressure and rebalance gun.

Excessive overspray

Air pressure to high.

Gun too far from work surface.

Dry spray

Air pressure too high.

Gun too far from work surface.

Gun motion too fast.

Fluid flow too low.

Reduce air pressure.

Adjust to correct distance.

Reduce air pressure.

Adjust to correct distance.

Slow down.

Wind out needle adjusting screw or use larger nozzle size.

Fluid leaking from packing nut

Replace.

Fluid leaking or dripping from front of gun

Runs and sags

Packing or Fluid Needle worn.

Fluid nozzle or fluid needle worn or damaged.

Foreign matter in fluid nozzle.

Fluid needle dirty or stuck in needle packing

Wrong size fluid needle or fluid nozzle.

Too much material flow.

Material too thin.

Gun tilted on an angle, or gun motion too slow.

Replace fluid nozzle and fluid needle.

Clean.

Clean

Replace fluid nozzle and fluid needle.

Turn fluid adjusting knob clockwise or switch to smaller fluid nozzle and fluid needle size.

Mix correctly or apply light coats.

Hold gun at right angle to work and adapt to correct gun technique.

16

© 2010 ITW Finishing Systems and Products

DGi Digital

Pressure Gauge

DGIPRO-502-BAR

Spanner

Torx driver

MPV Swivel

SN-28-K

SPN-8-K2

MPV-60-K3

Cleaning Brush 4900-5-1-K3

ACCESSORIES

MC-1-K50

10m x 8mm bore rubber air hose with

¼ fittings

QD Female connector

600 cc Mixing

Cups pack of 50

H-6065-B (BSP)

H-6065-N (NPS)

MPV-424

QD male connector

DVFR Filter

Regulator

MPV-5

DVFR-8

WARRANTY

This product is covered by ITW Finishing Systems and Products Limited one year warranty.

ITW Finishing Systems and Products

Ringwood Road,

Bournemouth,

BH11 9LH, UK

Tel. No. (01202) 571111

Telefax No. (01202) 581940,

Website address http://www.itwifeuro.com

ITW Finishing Systems and Products is a Division of ITW Ltd. Reg. Office: Admiral House, St Leonard’s Road, Windsor,

Berkshire,SL4 3BL,UK. Registered in England: No 559693 Vat No 619 5461 24

© 2010 ITW Finishing Systems and Products

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Key Features

  • HVLP technology
  • EPA compliant Trans-Tech® technology
  • Suitable for various materials
  • Universal air and fluid connections
  • Interchangeable color ID system
  • Anodized aluminium gun body
  • Removable spray head
  • Self-adjusting needle packing
  • Adjustable fan air and fluid volume

Frequently Answers and Questions

What materials can I use with this spray gun?
The GTI-HD Spray Gun is suitable for use with both waterbased and solvent based coating materials. However, it is not designed for use with highly corrosive and/or abrasive materials.
How do I adjust the spray pattern?
You can adjust the spray pattern by turning the spreader valve knob clockwise to reduce the pattern size.
What is the recommended spray distance?
The recommended spray distance is 150-200 mm.
How do I clean the spray gun?
To clean the air cap and fluid nozzle, brush the exterior with a stiff bristle brush. To clean fluid passages, remove excess material from the cup, or disconnect the hose for pressure models, then flush with gun wash solution. Wipe the gun exterior with a dampened cloth. Never completely immerse in any solvent or cleaning solutions.

Related manuals

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