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Brass acetylene regulator with two gauges and CGA-300 inlet

Victor Thermal Dynamics

Victor Thermal Dynamics 0781-0583 Single-Stage Acetylene Regulator CGA-300 2-15 psi

SKU CH-FE24-ZB3NW

Single-stage acetylene regulator with CGA-300 inlet, 2-15 psi delivery range and forged brass body

  • Product typeWelding Supplies
  • Forged brass body resists corrosion for long service life
  • Single-stage design delivers steady 2 to 15 psi acetylene flow
  • CGA-300 inlet connects directly to standard acetylene cylinders
  • 2 1/2 in gauges show supply at 400 psi and outlet pressure clearly
  • UL252 listed by ETL for verified safety compliance

Single-Stage Acetylene Regulator CGA-300

The Victor Thermal Dynamics 0781-0583 is a single-stage regulator built for acetylene cylinders with a CGA-300 inlet. It delivers a controlled outlet pressure range of 2 to 15 psi for general-purpose welding and cutting tasks. The forged brass body and stainless steel diaphragm are designed for durability in workshop environments. A 2 1/2 inch supply pressure gauge reads up to 400 psi.

Replaces Worn Single-Stage Units

This regulator replaces an existing single-stage acetylene regulator that no longer holds a steady delivery pressure or shows damage on the inlet connection. The jump is worth it when the current gauge reads inaccurately or the diaphragm leaks, causing flame instability. It fits the same CGA-300 cylinder valve and 9/16 in.-18 M LH outlet used on many torch handles. UL252 listing by ETL confirms compliance for general-purpose service.

Limits of CGA-300 Single-Stage Design

The CGA-300 inlet restricts use to acetylene cylinders only; it will not connect to oxygen, propane or other gas valves. Single-stage construction means delivery pressure can rise as cylinder pressure drops, requiring occasional readjustment during long jobs. Maximum inlet pressure is rated at 3,000 psi, so the regulator must not be used on cylinders exceeding that pressure. California Proposition 65 warning applies due to contained chemicals.

How it compares

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Price $256.99
Pricier than about 84% of the 1,978 comparable items (median $50.99).

Specifications

Product
Brand nameVICTOR
Product typeWelding Supplies

Questions about this item

Does the CGA-300 inlet thread match my acetylene cylinder valve?

Yes, the CGA-300 inlet is the standard connection for acetylene cylinders and threads directly onto the tank valve.

How do I set the 2-15 psi delivery range without damaging the stainless-steel diaphragm?

Close the torch valve, open the cylinder slowly, then turn the adjusting screw clockwise until the outlet gauge reads the desired pressure.

When should I replace the 400 psi supply-pressure gauge on this regulator?

Replace the gauge if the needle sticks, reads off-zero when the cylinder is closed, or the lens is cracked.

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