PSF Series

PSF Series Gas-Cooled MIG/MAG Welding Torches for Industrial Welding

The INWELT PSF Series is a family of gas-cooled MIG/MAG welding torches designed for professional fabrication, industrial production, repair and aftermarket replacement applications.

The current INWELT range includes:

• PSF250 – gas-cooled MIG/MAG welding torch

• PSF305 – gas-cooled MIG/MAG welding torch

• PSF405 – higher-current gas-cooled MIG/MAG welding torch

• PSF505 – heavy-duty gas-cooled MIG/MAG welding torch

The series covers different welding-current classes, welding-wire diameters and torch-cable lengths while using serviceable front-end consumables and Euro-style central connections.

Each model should be selected according to its verified INWELT current rating, shielding gas, duty cycle, welding-wire diameter, cable length and machine interface.

INWELT PSF Series Model Comparison

Model	Cooling	Current INWELT CO₂ Rating	Current INWELT Mixed-Gas Rating	Duty Cycle	Wire Size	Cable Length
PSF250	Gas Cooled	230A	200A	60%	0.8–1.2 mm	3 / 4 / 5 m
PSF305	Gas Cooled	290A	260A	60%	0.8–1.2 mm	3 / 4 / 5 m
PSF405	Gas Cooled	350A	320A	60%	0.8–1.6 mm	3 / 4 / 5 m
PSF505	Gas Cooled	500A	400A	60%	1.2–2.0 mm	3 / 4.5 m

These values are based on the current INWELT product specifications.

Because similarly named PSF-style torches from different manufacturers can use different ratings, always use the verified INWELT technical data when selecting an INWELT torch.

PSF250 Gas-Cooled MIG Welding Torch

The PSF250 is the most compact model in the current INWELT PSF Series.

Current INWELT specifications include:

• 230A with CO₂

• 200A with mixed shielding gas

• 60% duty cycle

• 0.8–1.2 mm welding wire

• Gas-cooled construction

• 3 m / 4 m / 5 m cable options

• Euro-style central connection

The PSF250 is intended for professional fabrication and general production welding where a relatively compact gas-cooled torch is preferred.

Typical applications can include:

• General fabrication

• Sheet-metal production

• Automotive repair

• Machinery maintenance

• Light structural fabrication

PSF305 Gas-Cooled MIG Welding Torch

The PSF305 provides additional current capacity while retaining a gas-cooled torch architecture.

Current INWELT specifications include:

• 290A with CO₂

• 260A with mixed shielding gas

• 60% duty cycle

• 0.8–1.2 mm welding wire

• Gas-cooled construction

• 3 m / 4 m / 5 m cable options

• Euro-style central connection

The current PSF305 consumable system includes an M8 contact-tip configuration, gas diffuser, gas nozzle, torch head, liner and replaceable cable components.

This model is suitable for medium-duty fabrication and production welding.

PSF405 Gas-Cooled MIG Welding Torch

The PSF405 is designed for higher-current gas-cooled MIG/MAG applications.

Current INWELT specifications include:

• 350A with CO₂

• 320A with mixed shielding gas

• 60% duty cycle

• 0.8–1.6 mm welding wire

• Gas-cooled construction

• 3 m / 4 m / 5 m cable options

• Euro-style central connection

The wider wire-size range makes the PSF405 suitable for applications requiring larger welding wire than the PSF250 and PSF305.

Typical applications include:

• Structural fabrication

• Machinery manufacturing

• Agricultural equipment

• Construction equipment

• Production welding

• Industrial repair

PSF505 Heavy-Duty Gas-Cooled MIG Welding Torch

The PSF505 is the highest-current model currently displayed in the INWELT PSF Series.

Current INWELT specifications include:

• 500A with CO₂

• 400A with mixed shielding gas

• 60% duty cycle

• 1.2–2.0 mm welding wire

• Gas-cooled construction

• 3 m / 4.5 m cable options

• Euro-style central connection

The PSF505 uses a heavier-duty front-end and cable system for larger welding-wire diameters and higher-current applications.

Typical applications include:

• Heavy machinery

• Structural steel

• Railway fabrication

• Mining equipment

• Heavy equipment manufacturing

• High-deposition fabrication

How to Choose the Correct PSF MIG Welding Torch

The correct PSF model should be selected by technical requirements rather than model number alone.

Choose by Welding Current

First determine the actual welding-current requirement.

The current INWELT PSF range progresses from the PSF250 through the higher-current PSF505.

Do not continuously operate a torch above its verified rating.

Choose by Shielding Gas

MIG/MAG torch current ratings can differ according to shielding gas.

Always distinguish between:

• 100% CO₂

• Mixed shielding gas

Do not use the CO₂ rating as the mixed-gas rating.

Choose by Duty Cycle

The current INWELT PSF models are listed with a 60% duty cycle.

Duty cycle describes the percentage of a defined operating period during which the torch can weld at its rated load without exceeding its thermal limit.

Actual operating temperature is also influenced by:

• Welding current

• Shielding gas

• Arc-on time

• Ambient temperature

• Cable condition

• Front-end consumables

Choose by Welding-Wire Diameter

Current wire-size ranges include:

• PSF250: 0.8–1.2 mm

• PSF305: 0.8–1.2 mm

• PSF405: 0.8–1.6 mm

• PSF505: 1.2–2.0 mm

The contact tip, liner, drive rolls and welding procedure must match the selected wire diameter.

Choose by Cable Length

Current cable options include:

• 3 m

• 4 m

• 4.5 m

• 5 m

Available lengths depend on the specific model.

Longer cables can improve working reach but also require correct liner selection and wire-feeding setup.

PSF Series Euro Central Connector

Current INWELT PSF configurations use Euro-style central connections.

A Euro central adapter can combine several MIG torch functions through one rear interface, helping simplify torch installation and replacement on compatible welding machines.

However, a Euro-style connection alone does not guarantee complete compatibility.

Before ordering, verify:

• Connector geometry

• Trigger circuit

• Gas passage

• Wire-feed position

• Liner dimensions

• Machine-side socket

For replacement orders, photographs of the existing torch connector and welding-machine interface are recommended.

ESAB-Style PSF Replacement Torch Compatibility

The INWELT PSF Series is designed around common ESAB-style PSF torch and consumable formats for replacement and aftermarket applications.

Compatibility should be verified by technical configuration rather than the PSF model name alone.

Check:

• Current rating

• Duty cycle

• Welding-wire diameter

• Contact-tip specification

• Gas diffuser

• Gas nozzle

• Torch head

• Liner

• Cable length

• Rear connector

INWELT PSF Series torches are independently manufactured replacement-format products.

Third-party trademarks and model references should be used only to identify compatibility or replacement formats where applicable.

PSF Series Contact Tips

The contact tip transfers welding current to the electrode wire and guides the wire into the welding arc.

Current PSF configurations include M8-style contact-tip systems on selected models.

Select a contact tip according to:

• Welding-wire diameter

• Wire material

• Contact-tip thread

• Tip length

• Torch model

• Welding current

Do not select a contact tip only by wire diameter.

The contact-tip holder and gas diffuser must also match.

PSF Series Gas Nozzles

The gas nozzle directs shielding gas around the welding arc and molten weld pool.

Different PSF models can use different nozzle dimensions and front-end designs.

Inspect the gas nozzle regularly for:

• Heavy spatter

• Distortion

• Heat damage

• Blocked gas flow

• Loose fitting

A damaged or heavily contaminated nozzle can reduce shielding-gas coverage.

PSF Series Gas Diffusers

The gas diffuser distributes shielding gas through the torch front end and supports the contact-tip system.

Correct diffuser selection is important for:

• Contact-tip positioning

• Gas distribution

• Nozzle installation

• Stable shielding around the weld pool

For example, current INWELT PSF305 and PSF405 parts use an M8 diffuser system shared across several related PSF-style torch configurations.

Always confirm the exact part number before ordering replacement consumables.

PSF Series Welding Liners

The welding liner guides electrode wire through the torch cable assembly.

Correct liner selection depends on:

• Wire diameter

• Wire material

• Cable length

• Torch model

• Wire-feeding system

A worn, contaminated or incorrectly sized liner can contribute to:

• Irregular wire feeding

• Bird-nesting

• Increased feeding resistance

• Unstable arc behavior

• Premature contact-tip wear

Steel liners should be selected according to the approved wire-size range.

Alternative liner systems may be required for softer welding wires.

PSF Series Torch Heads and Swan Necks

Each PSF torch uses a model-appropriate torch head or swan-neck assembly.

The torch neck carries welding current, shielding gas and welding wire to the front-end consumables.

Inspect the neck if you experience:

• Excessive heating

• Gas leakage

• Loose front-end components

• Unstable electrical contact

• Mechanical damage

Do not substitute torch heads between models unless the parts relationship has been verified.

Gas-Cooled MIG Torch Design

The current INWELT PSF250, PSF305, PSF405 and PSF505 products are gas-cooled torches.

They do not require an external liquid-cooling unit.

This provides a relatively simple torch system for applications where the verified current rating and duty cycle are appropriate.

A gas-cooled torch should not be described as water cooled unless the actual product contains a verified liquid-cooling circuit.

CO₂ vs. Mixed-Gas Ratings in the PSF Series

The shielding gas affects torch thermal loading.

Current INWELT ratings are:

Model	CO₂ Rating	Mixed-Gas Rating
PSF250	230A	200A
PSF305	290A	260A
PSF405	350A	320A
PSF505	500A	400A

Always use the correct rating for the shielding gas used in production.

Which PSF Torch Is Best for Different Wire Sizes?

For current INWELT models:

0.8–1.2 mm Wire

Consider:

• PSF250

• PSF305

PSF405 can also support this range depending on the required current.

Up to 1.6 mm Wire

Consider:

• PSF405

1.2–2.0 mm Wire

Consider:

• PSF505

Final model selection should also consider current, shielding gas, duty cycle and cable length.

Which Materials Can PSF MIG Torches Weld?

When configured with the correct wire, liner, contact tip, shielding gas and welding parameters, PSF Series MIG/MAG torches can support welding of materials including:

• Carbon steel

• Mild steel

• Stainless steel

Other materials may require specific wire-feed and liner configurations.

The torch alone does not determine material compatibility.

The complete welding process must match the base material and filler wire.

Typical Applications for PSF Series MIG Torches

Depending on model, PSF Series torches can be used in professional applications including:

• General metal fabrication

• Structural steel

• Automotive manufacturing and repair

• Agricultural machinery

• Construction equipment

• Railway fabrication

• Heavy machinery

• Industrial maintenance

• Production welding

The correct model should be selected according to actual welding parameters rather than industry name alone.

How to Check PSF Replacement Torch Compatibility

Before replacing an existing welding gun, confirm the following:

Welding Current

Compare both CO₂ and mixed-gas ratings.

Duty Cycle

Make sure the torch supports the required arc-on time.

Wire Diameter

The contact tip, liner and wire feeder must match.

Cable Length

Choose the appropriate hose package for the workstation.

Rear Connector

Confirm the machine-side Euro connection.

Consumables

Verify the contact tip, diffuser, nozzle and torch-head format.

Trigger Circuit

The trigger connection must match the welding-machine control circuit.

Model name alone is not enough to guarantee compatibility.

How Often Should PSF MIG Torch Consumables Be Replaced?

There is no universal replacement interval for PSF consumables.

Service life depends on factors such as:

• Welding current

• Duty cycle

• Wire diameter

• Shielding gas

• Spatter level

• Welding position

• Contact-tip quality

• Liner condition

• Operator technique

Inspect components when symptoms appear.

Common indicators include:

• Unstable arc

• Irregular wire feeding

• Burn-back

• Excessive spatter

• Poor gas shielding

• Damaged nozzle

• Increased electrical resistance

Replace parts according to actual wear rather than a fixed number of operating hours.

Common PSF MIG Torch Problems

Irregular Wire Feeding

Check:

• Liner condition

• Contact-tip size

• Cable bends

• Drive-roll pressure

• Welding-wire condition

Excessive Spatter

Check:

• Welding parameters

• Shielding gas

• Contact-tip wear

• Nozzle condition

• Electrode stick-out

Torch Overheating

Possible causes include:

• Current above the verified rating

• Duty cycle exceeded

• Worn contact tip

• Poor electrical connection

• Damaged cable assembly

• Excessive continuous welding

Poor Gas Coverage

Check:

• Gas nozzle

• Gas diffuser

• Gas flow

• Gas leakage

• External drafts

Troubleshooting should consider the complete welding system rather than the torch alone.

PSF Series Consumables for Distributors and Aftermarket Supply

A professional PSF aftermarket program can include:

• Complete PSF250 torches

• Complete PSF305 torches

• Complete PSF405 torches

• Complete PSF505 torches

• Contact tips

• Gas nozzles

• Gas diffusers

• Torch heads

• Swan necks

• Triggers

• Handles

• Welding liners

• Cable assemblies

• Euro central adapters

• Cable supports

Publishing exact INWELT part numbers helps distributors reduce replacement errors and manage recurring consumable demand.

OEM PSF Series MIG Welding Torch Manufacturing by INWELT

INWELT supplies PSF Series welding torches and replacement parts to professional B2B customers including:

• Welding machine manufacturers

• Welding equipment brands

• Importers

• Distributors

• Wholesalers

• Industrial suppliers

• Repair companies

• Aftermarket consumable brands

OEM and ODM configurations can be evaluated according to the target welding system and market requirements.

OEM and Private-Label Options

Available customization can include:

• Customer branding

• Product labels

• Handle marking

• Cable length

• Connector configuration

• Liner configuration

• Consumable kits

• Product color

• Private-label packaging

• User manuals

• Barcode and carton requirements

For OEM projects, provide the welding-machine model, required current, shielding gas, wire diameter, connector and estimated purchasing quantity.

Why Source PSF Series MIG Torches from INWELT?

The current INWELT PSF Series combines four gas-cooled torch models with a serviceable replacement-consumable system.

The range includes:

• PSF250

• PSF305

• PSF405

• PSF505

• CO₂ and mixed-gas ratings

• 0.8–2.0 mm wire coverage across the range

• Multiple cable lengths

• Euro central connections

• Contact tips

• Gas nozzles

• Diffusers

• Welding liners

• Torch heads

• Cable assemblies

• OEM/private-label supply

For equipment brands, distributors and importers, sourcing complete torches and aftermarket components from the same manufacturer can simplify purchasing and product support.

Frequently Asked Questions About PSF Series MIG Welding Torches

What models are included in the INWELT PSF Series?

The current range includes:

• PSF250

• PSF305

• PSF405

• PSF505

Are INWELT PSF Series torches gas cooled or water cooled?

The current PSF250, PSF305, PSF405 and PSF505 products displayed in this category are gas cooled.

What is the PSF250 current rating?

The current INWELT specification lists:

• 230A CO₂

• 200A mixed gas

• 60% duty cycle

What is the PSF305 current rating?

The current INWELT specification lists:

• 290A CO₂

• 260A mixed gas

• 60% duty cycle

What is the PSF405 current rating?

The current INWELT specification lists:

• 350A CO₂

• 320A mixed gas

• 60% duty cycle

What is the PSF505 current rating?

The current INWELT specification lists:

• 500A CO₂

• 400A mixed gas

• 60% duty cycle

Which PSF model supports the largest welding wire?

The current PSF505 supports wire from approximately 1.2 to 2.0 mm.

What cable lengths are available?

Depending on model, current configurations include:

• 3 m

• 4 m

• 4.5 m

• 5 m

Do PSF Series torches use Euro connectors?

Current standard INWELT PSF configurations use Euro-style central connections.

Confirm the machine interface before ordering.

Are PSF250, PSF305, PSF405 and PSF505 consumables interchangeable?

Not automatically.

Some related models may share selected consumables, but contact tips, diffusers, nozzles, heads and liners must be confirmed by part number.

Are INWELT PSF torches original ESAB products?

No.

INWELT PSF Series torches are independently manufactured replacement-format MIG/MAG welding torches.

Third-party model names or trademarks are used only for compatibility identification where applicable.

Are INWELT PSF ratings identical to original ESAB PSF ratings?

Not necessarily.

INWELT products use their own technical specifications, and current ratings can differ from historical specifications published for similarly named third-party torches.

Always use the current INWELT specification when selecting an INWELT torch.

Can PSF Series torches weld stainless steel?

Yes, when configured with suitable welding wire, shielding gas, liner, contact tip and welding parameters.

Does INWELT offer OEM PSF Series MIG torches?

Yes.

OEM/ODM, private labeling, cable customization, connector options, consumable kits and packaging customization are available for qualified B2B customers.

Request a Quote for INWELT PSF Series MIG Welding Torches

For faster model selection and compatibility confirmation, provide:

• Welding machine manufacturer and model

• Required welding current

• CO₂ or mixed-gas application

• Welding-wire diameter

• Existing torch model

• Rear connector photograph

• Required cable length

• Required consumables

• Estimated order quantity

• INWELT or private-label branding

INWELT can then recommend the appropriate PSF250, PSF305, PSF405 or PSF505 configuration for your welding system.