Laser Gases

Most industrial lasers require 'lasing gas' to generate the laser light and 'assist gas' to aid the process

All BOC laser gases are produced at ISO 9002 accredited facilities and are designed to meet or exceed the specifications of laser manufacturers.

BOC provides a range of both mixed and pure gases for lasing purposes.

Lasing gas quality

The purity of lasing gas must be extremely high to avoid contamination of laser components and resultant impaired laser performance.

Moisture and hydrocarbons are particularly detrimental to the performance of CO2 lasers.

BOC lasing gases have extremely high purity which exceeds manufacturer specifications, ensuring high reliability and maximisation of optics' life.

Laser gas range

BOC supplies a variety of pre-mixed gases and an extensive range of specialist gas mixtures for all major lasers.

If the mixture you require is not listed, please contact us directly.

High purity gases

Part No	Gas description	Gas contents	Pressure (bar)	Valve
270010-F	CP Grade Carbon dioxide 99.995%	5kg	50	BS8
111095-Y		14kg	50	BS8
27008-J		25kg	50	BS8
110745-V	Grade A Helium 99.996%	1.18m3	200	BS3
101720-L		9.10m3	200	BS3
291885-WZ		194.7m3	300	BS3
110744 -V	CP Grade Helium 99.999%	1.81m3	200	BS3
271088-L		9.10m3	200	BS3
151476-WZ		194.70m3	300	BS3

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Rofin DC Premix

BOC is an approved supplier for the Rofin DC premix.

Only Rofin-approved suppliers are permitted to provide this product.

Part No	Gas description	Gas contents	Pressure (bar)	Valve
155859-AVX-C	Rofin DC Premix	1.35m3	150	DIN1

Lasermix Gases

Part No	Gas description	Gas contents	Pressure (bar)	Valve
131641-BC-C	Lasermix 1 4.5% Carbon Dioxide 13.5% Nitrogen Balance Helium	0.25m3	137	BS3
131641-AV-C		1.25m3	137	BS3
225082-L		8.8m3	200	BS3
131643-AV-C		1.26m3	137	BS3
225081-L-C	Lasermix 2 9% Carbon Dioxide 13.5% Nitrogen Balance Helium	8.88m3	200	BS3
225077-L-C		1.26m3	137	BS3
283892-V-C	Lasermix 3 12% Carbon Dioxide 12% Nitrogen Balance Helium	8.95m3	200	BS3
285276-L-C	Lasermix 4 5% Carbon Dioxide 40% Helium Balance Nitrogen	1.82m3	200	BS3
283892-L-C		8.95m3	200	BS3
285276-L-C	Lasermix 5 3.4% Carbon Dioxide 15.6% Nitrogen Balance Helium	8.78m3	200	BS3

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Excimer Lasers

BOC provides a range of lasing gases for use with excimer lasers.

The lasing gases consist of a halogen donor, a rare gas buffer and an inert gas dilutent.

Rare gases, such as neon, krypton and xenon, are available in pure form or as a mixture to your own specification, directly from BOC.

Part No	Gas description	Gas contents	Pressure (bar)	Valve
229454-F	5% Fluorine Balance Helium	1.17m3	134	DIN8
122791-F	5% Hydrogen Chloride Balance Helium	1.16m3	137	BS14
157839-V	5% Hydrogen Chloride 1% Hydrogen Balance Helium	1.38m3	150	BS15

Laser Gas Equipment - LAS PDS

The LAS PDS changeover manifold is designed to connect two cylinders to a single outlet, allowing continuity of supply whilst an empty cylinder is changed. For helium, nitrogen and carbon dioxide lasing gases.

Features

- Automatic changeover manifold for continuity of gas supply
- Effective two stage regulation for controllable and stable outlet pressures
- Stainless steel diaphragms
- Flexible hoses with non return valves to connect to cylinders
- Interstage relief valve
- Delivery pressures to 8 bar with outlet pressure gauge (13 bar)

Specification

• Body: Chrome plated forged brass
• Valve seat/seals: Brass,viton
• Seat return spring: Stainless steel
• Filter: 10 micron stainless steel
• Seals: Nylon
• Operating temperature: -17 to +57°C 
• Dimensions: 230 x 250mm excluding hoses
• Maximum inlet pressure: 207 bar
• Flow rate: Cv=0.05

Model	Outlet pressure bar (psi)	Relief valve setting bar (psi)	Changeover pressure bar
LAS PDS	0-8.6 (0-125)	set to open at 27 bar (400 psi)	11.3 - 13.7

Standard Supply  
      
600mm flexible hoses with cylinder connections and non return valves
Cylinder contents gauges
Automatic changeover unit and final regulator
Outlet pressure gauge
1/4"compression fitting outlet 

Options

HI-Inlet isolation valve
IV-Isolation valve on outlet
R-Outlet relief valve  

How to order

ALWAYS specify gas or mixture to be used: 

1. Select model eg.LAS PDS
2. Select inlet connection eg.BS3
3. Select outlet connection  eg.1/4" compression fitting (for copper tube)
4. Select any options eg.HI,IV,R   
   
   

Assist Gases

Assist gases (or process gases) are used at the point in the process where the laser interacts with the material.

Choice of assist gas

The choice of assist gas is extremely important and can have a significant effect on the resulting process quality and productivity.

When cutting mild steel, oxygen can enable higher cutting speeds and greater thickness at lower pressure and flow rate than nitrogen.

Nitrogen and other inert assist gases prevent surface oxidation, producing a higher quality finish which requires minimal preparation for other fabrication processes (such as welding) and surface treatment.

Lasers can cut a wide range of materials including ferrous and non-ferrous metals, plastics, wood and ceramics.

The choice of assist gas should be made with regard to the material being cut.

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Gases for laser cutting

Material	Oxygen	Oxygen high purity	Nitrogen	Argon
Mild Steel	o	o	o
Stainless Steel	o	o	o
Aluminium			o
Titanium				o

Gases for laser welding

Material	Helium	Argon
CO2	o	o*
ND:YAG		o
Diode		o