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Brass single-stage gas regulator with CGA-320 inlet and dual gauges

Miller Enterprises

Miller Enterprises 30-150-320 Single Stage Gas Regulator CGA-320 0 to 150 psi

SKU CH-FBE8-8SRT3 MPN 30-150-320

Single-stage regulator delivers 0 to 150 psi from CGA-320 cylinders with a 2.0 in gauge

  • Product typeTraffic & Parking Lot
  • Single-stage design delivers consistent 0 to 150 psi outlet pressure
  • CGA-320 inlet connects directly to CO₂ cylinders
  • 0 in gauge shows supply pressure up to 4,000 psi
  • Brass body with neoprene diaphragm resists corrosion
  • UL Listed for general-purpose welding applications

Regulator for CO₂ cylinders

The Miller Enterprises 30-150-320 is a single-stage gas regulator designed for carbon dioxide service. It connects to a cylinder via a CGA-320 inlet and delivers pressure through a 5/8 in. -18 RH internal outlet. The brass body and neoprene diaphragm handle a maximum inlet pressure of 3,500 psi.

Steady delivery up to 150 psi

The unit provides a delivery range of 0 to 150 psi for general-purpose applications. A 2 in. gauge displays supply pressure up to 4,000 psi. The single-stage design reduces cylinder pressure in one step, while the Sure Seat filtered seat helps maintain consistent flow. The bright nickel-plated bonnet adds corrosion resistance.

CGA-320 inlet defines the gas service

The CGA-320 connection limits use to carbon dioxide cylinders only. Maximum inlet pressure is capped at 3,500 psi, so the regulator cannot be used with higher-pressure sources. The 5/8 in. -18 RH outlet fits compatible hoses and equipment. UL listing confirms compliance with applicable safety standards.

How it compares

Measured against everything we stock in Welding Equipment & Positioners, at today’s prices. Recalculated every night.

Price $147.99
Pricier than about 73% of the 1,978 comparable items (median $50.99).

Specifications

Product
Brand nameMILLER ELECTRIC
Model name30-150-320
Product typeTraffic & Parking Lot

Questions about this item

Does the single-stage 0-150 psi regulator maintain steady flow without overheating during long welding sessions?

The brass body and neoprene diaphragm are designed for continuous general-purpose use at up to 150 psi delivery pressure.

Which cylinder fitting and outlet hose do I need to connect this CGA-320 regulator?

It requires a CGA-320 cylinder valve and accepts a 5/8 in.-18 RH internal outlet connection.

Will the 4,000 psi supply gauge read accurately on my older CO₂ cylinder rated for 3,500 psi max inlet?

The gauge reads up to 4,000 psi while the regulator's maximum inlet pressure is 3,500 psi, matching your cylinder rating.

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