Sealey SIEGEN S775 - User Manual

Questions and Answers

L
Lisa FordJul 28, 2025
How to fix a faulty spray from my Sealey SIEGEN S775 Paint Sprayer?
- T
  Theresa JohnsonJul 28, 2025
  If your Sealey Paint Sprayer produces a faulty spray, it might be due to improper cleaning or dried material around the fluid nozzle tip or in the air cup. Use a brush and solvent to remove it. Another cause could be a damaged air cup or paint nozzle, in which case the part must be replaced.
R
Ryan HarrisonAug 1, 2025
What to do if my Sealey Paint Sprayer's spray 'flutters'?
- M
  Mr. Gary Gomez MDAug 1, 2025
  If the Sealey Paint Sprayer's spray ‘flutters’, it could be due to several reasons: worn needle packing that allows air into the fluid passageway, dirt between the paint nozzle seat and body, a loose paint nozzle, or a loose or defective joint between the pot and gun. To resolve this: 1. Tighten the packing screw, or replace the packing if it's severely worn. 2. Remove the fluid nozzle and clean the back of the nozzle and the nozzle seat in the gun body using a rag dampened with solvent. 3. Tighten or replace the affected parts.
M
Mark BridgesAug 7, 2025
How to clean dried material from the nozzle of my Sealey Paint Sprayer?
- J
  johnsonwesleyAug 7, 2025
  If dried material around the outside of the fluid nozzle tip restricts the passage of atomizing air in your Sealey Paint Sprayer, or if the air cup is loose, remove the air cup and wipe off the fluid tip using a rag dampened with solvent. Also, ensure that you tighten the air cup.
R
robert05Aug 12, 2025
Why does material bubble in the paint cup of my Sealey SIEGEN S775 Paint Sprayer?
- M
  mnunezAug 12, 2025
  If material bubbles or “boils” in the paint cup of your Sealey Paint Sprayer, it is caused by atomized air flowing through the paint channel to the bottle, or the paint nozzle is not sufficiently tight. Tighten, clean, or replace parts accordingly.
B
Brian BaileyAug 17, 2025
Why Sealey SIEGEN S775 Paint Sprayer has a split spray pattern?
- M
  Mary RossAug 17, 2025
  A split spray, or one that is heavy at each end of the fan pattern and weak in the middle, from your Sealey Paint Sprayer can be caused by too high an atomization air pressure or by attempting to get too wide a spray with thin paint.
J
Jack McgeeAug 21, 2025
What to do if dried material blocks air passage in my Sealey Paint Sprayer?
- D
  Donald ValentineAug 21, 2025
  If dried material in a side port restricts the passage of air in your Sealey Paint Sprayer, dissolve the material in the side ports with solvent, then blow the gun clean. Do not poke into the nozzles with metal instruments.

Summary

Safety Precautions and General Warnings

Personal Protective Equipment

Mandatory personal protective equipment including eye, hand, foot, clothing, and respiratory protection.

Safe Operation Guidelines

Key safety instructions for handling, spraying, and maintaining the spray gun, including prohibitions.

Preparation and Operation

Spraying Technique

Guidance on achieving optimal spray patterns, controlling paint flow, and adjusting the spray gun.

Maintenance and Troubleshooting

Cleaning Procedures

Instructions for thoroughly cleaning the spray gun after use with appropriate solvents and brushes.

Problem Diagnosis

Common issues like dried material, split spray, or material in paint, with their causes and solutions.

Summary

Safety Precautions and General Warnings

Personal Protective Equipment

Mandatory personal protective equipment including eye, hand, foot, clothing, and respiratory protection.

Safe Operation Guidelines

Key safety instructions for handling, spraying, and maintaining the spray gun, including prohibitions.

Preparation and Operation

Spraying Technique

Guidance on achieving optimal spray patterns, controlling paint flow, and adjusting the spray gun.

Maintenance and Troubleshooting

Cleaning Procedures

Instructions for thoroughly cleaning the spray gun after use with appropriate solvents and brushes.

Problem Diagnosis

Common issues like dried material, split spray, or material in paint, with their causes and solutions.

The Siegen S775 is a suction feed spray gun designed for automotive refinishing, featuring a 1.7mm set-up. It is suitable for use with water-based paints and comes equipped with an air regulator control and a cam action suction pot.

Function Description:

The spray gun is used to apply paint evenly to surfaces. It operates by drawing paint from the suction pot and atomizing it with compressed air, creating a fine mist for application. The gun is designed for precise control over paint flow and spray pattern, allowing for uniform coverage and a professional finish.

Important Technical Specifications:

Model No: S775
Standard Set-up: 1.7mm
Recommended Air Pressure: 30 - 70psi
Air Consumption: 12 - 15cfm
Pot Capacity: 900ml
Air Connection: 1/4"BSP
Available Set-Ups: 1.5, 1.8, 2mm
Nett Weight: 1.12kg

Usage Features:

Safety First: Users must familiarise themselves with the gun's application, limitations, and potential hazards. It is crucial to disconnect the spray gun from the air supply before any maintenance or accessory changes.
Proper Maintenance: The gun should be well-maintained and kept in good condition, with damaged parts replaced only by recommended components. Unauthorised parts can be dangerous and void the warranty.
Work Area: The spray gun should be used in a suitable, clean, tidy, and well-ventilated work area with adequate lighting.
Personal Protection: Approved respiratory protection, safety eye goggles, and skin protection are mandatory. Ill-fitting clothing, ties, watches, rings, and loose jewellery should be removed, and long hair tied back.
Isocyanate Finisher: When spraying isocyanate-based finishers, an approved respirator/clean air breathing apparatus, latex gloves, and an impervious hooded coverall are required to cover exposed skin.
Air Supply: Ensure the air supply is clean and does not exceed 90psi. Too high pressure or unclean air can shorten the gun's life and be dangerous. The air supply tank should be drained daily, and the compressor air inlet filter cleaned weekly. Line pressure may need to be increased for long air hoses (over 8 metres), and hose bore should be at least 10mm.
Preparation: Before first use, the gun must be flushed with paint solvent to remove the anti-corrosion agent applied during manufacturing. It is critical to use only solvents/cleaning agents that do NOT contain halogenated hydrocarbons, as these can react explosively with the gun's aluminium components.
Operation Technique: For best results, the gun should be held perpendicular to the surface and moved parallel to it. The stroke should start before squeezing the trigger and end after releasing the trigger. This ensures accurate control of the gun and paint.
Spraying Distance: Spray from a distance of 6 to 10 inches, depending on the material and atomizing pressure. The paint deposited should be even and wet, with each stroke overlapping the preceding one for a uniform finish.
Fan Spray and Paint Control:
- The paint control knob (fig.2.B) adjusts paint flow.
- The air input control (fig.2.C) should be set to the lowest effective flow.
- The air cap (fig.3.1) can be turned to achieve a horizontal or vertical fan spray, locked with the retaining ring (fig.3.2).
- The pattern knob (fig.2.A) controls the spray pattern, which is variable from round to flat.
- In normal operation, the cap wings are horizontal (fig.3) for a vertical fan-shaped pattern (fig.4), providing optimum coverage when moving the gun back and forth.

Maintenance Features:

Cleaning After Each Use: It is crucial to clean the gun thoroughly after every use. Disconnect it from the air supply before cleaning. Flush the gun with solvent and clean the nozzle with solvent and a brush.
Avoid Immersion: DO NOT immerse the entire gun in solvent, as this can dissolve lubricants and packing, causing them to dry out.
External Cleaning: Wipe the outside of the gun with a solvent-dampened rag.
Blocked Orifices: If orifices are blocked, use a probe softer than brass to clear them.
Re-assembly: Screw parts hand tight to avoid cross-threading. If a part doesn't turn easily, check for correct alignment. Avoid excessive force during re-assembly.
Lubrication: Lubricate the gun daily with a light machine oil, specifically the fluid needle packing, air valve packing, and trigger pivot point.
Nozzle Set Change: If changing the nozzle size, ensure the complete nozzle set is exchanged. Insert the paint nozzle before the paint needle.
Troubleshooting: Faulty spray is often caused by improper cleaning or dried material around the fluid nozzle tip or in the air cup. Use a brush and solvent to remove. Never use metal instruments to clean these parts, as damage can lead to a faulty spray. If the air cup or paint nozzle is damaged, it must be replaced.
- Side Port Restriction: If dried material restricts a side port, causing an uneven fan pattern, dissolve the material with solvent and blow the gun clean.
- Fluid Nozzle Tip Restriction: If dried material around the fluid nozzle tip restricts atomizing air, causing an uneven pattern, remove the air cup and wipe the fluid tip with a solvent-dampened rag. Tighten the air cup.
- Split Spray/Heavy Ends: If the spray is split or heavy at the ends, it may be due to too high atomization air pressure or attempting too wide a spray with thin paint.
- Paint Spray 'Flutters': This can be caused by worn needle packing (tighten or replace), dirt between the paint nozzle seat and body (clean the nozzle and seat), or a loose/defective joint between the pot and gun (tighten or replace).
- Material Bubbles/Boils in Paint Cup: This indicates atomized air flowing through the paint channel to the bottle, possibly due to a loose paint nozzle or an unscrewed air nozzle (tighten, clean, or replace parts).

Environmental Protection:

Unwanted materials, tools, accessories, and packaging should be recycled. Fluids should be drained into approved containers and disposed of according to local regulations.