MKX Regulator for CO₂ is a heavy-duty gas regulator designed for reliable flow, accurate pressure adjustment and improved protection in homebrew and draught beverage systems. Its large brass body, dual gauges and high-pressure operating capability make it suitable for standard keg dispensing as well as selected higher-pressure processes.

The regulator operates at pressures up to 65PSI and includes a green 70PSI pressure relief valve. It also features enhanced protection around both the high- and low-pressure gauges to help reduce accidental damage during transport, installation and regular use.

A Type 30 nut and stem is included for connection to compatible CO₂ and CO₂/nitrogen mixed gas cylinders.

Accurate Dual-Gauge Pressure Control

The regulator includes two gauges.

These normally display:

• Cylinder or inlet pressure
• Regulated outlet pressure

The low-pressure gauge helps the operator set the pressure supplied to the keg or gas system. Meanwhile, the high-pressure gauge displays the pressure entering the regulator from the cylinder.

Cylinder pressure does not always provide an accurate indication of the remaining liquid CO₂. Weighing the cylinder is generally a more reliable way to estimate the amount of gas left.

Up to 65PSI Operation

The MKX Regulator for CO₂ supports operation up to 65PSI.

This expanded range may suit:

• Beer dispensing
• Force carbonation
• Sparkling water systems
• Carbonated soft drinks
• Keg purging
• Pressure-assisted transfers
• Selected higher-pressure carbonation processes

Always confirm that the keg, tubing, disconnects, manifolds and other connected equipment are rated for the selected pressure.

The safe working pressure of a complete system is determined by its lowest-rated component.

Green 70PSI Pressure Relief Valve

The regulator includes a green pressure relief valve rated at 70PSI.

The relief valve provides an important protective function if outlet pressure rises above the intended operating range.

Never:

• Block the pressure relief valve
• Modify the valve
• Replace it with an incompatible part
• Operate the regulator above its stated limit

If the valve activates repeatedly, close the cylinder and inspect the system before continuing use.

Fully Encapsulated Seat Technology

Keg King’s fully encapsulated seat design helps isolate the regulator seat from contamination.

The seat uses UHMWPE material chosen for chemical stability and dependable sealing. This design avoids reliance on plumber’s tape within the seat assembly and helps maintain consistent regulator operation.

The enclosed seat may provide:

• Reduced contamination risk
• Stable sealing performance
• Improved chemical resistance
• Reliable pressure control
• Easier long-term maintenance

Regulators should still be inspected and serviced according to the manufacturer’s recommendations.

Dual Filtration

The regulator incorporates two stages of filtration.

These include:

• Filtration at the gas input
• A sintered filter on the seat cap

The filtration system helps reduce the chance of particles entering sensitive internal components.

Always keep cylinder valves, stems and regulator connections clean during installation.

Heavy-Duty Brass Body

The large brass body is designed to support strong gas flow and accurate regulation.

Its substantial construction offers:

• Durable everyday performance
• Stable pressure adjustment
• High gas-flow capacity
• Reliable threaded connections
• Suitability for home and commercial-style systems

The large adjustment knob allows pressure to be changed without difficult fine-tool adjustments.

Improved Gauge Protection

Both gauges receive enhanced physical protection compared with exposed-gauge regulator designs.

This is useful when the regulator is:

• Installed inside a busy kegging area
• Transported for events
• Used in portable draught systems
• Stored between brewing sessions
• Connected and disconnected regularly

Gauge protection reduces the risk of impact damage, but the regulator should still be handled carefully.

Never lift a gas cylinder by the regulator.

Outlet Fitting Options

Operators can select a compatible outlet configuration using either:

• 6mm barb fitting
• DM push-in fitting

A 6mm barb suits compatible gas tubing secured with an appropriate clamp.

A push-in fitting provides a neat connection for correctly sized tubing and may simplify installation or disconnection.

Confirm which fitting is supplied with the selected product variation.

Type 30 Nut and Stem Included

The included Type 30 nut and stem is designed for compatible:

• CO₂ cylinders
• CO₂ and nitrogen mixed-gas cylinders

Confirm the cylinder valve type before connecting the regulator.

Do not force incompatible cylinder and regulator fittings together.

Interchangeable Nut and Stem Options

Alternative nut and stem assemblies may be installed for selected gases.

Compatible configurations listed by the manufacturer include:

• Type 10: oxygen, argon and helium
• Type 50: nitrogen
• Type 30: CO₂ and CO₂/nitrogen mixed gases

The correct stem, cylinder fitting and regulator configuration must always be used for the selected gas.

Changes should be completed only by a competent person following appropriate gas-equipment procedures.

Multi-Gas Capability

With the correct compatible nut and stem installed, the regulator body may be used for gases including:

• Carbon dioxide
• Oxygen
• Argon
• Helium
• Nitrogen
• CO₂/nitrogen mixed gases

Gas compatibility does not mean the same stem can be used with every cylinder type.

The correct inlet fitting is essential.

Use in Homebrew Systems

This regulator is well suited to:

• Corny keg systems
• Stainless steel kegs
• PET pressure kegs
• Kegerators
• Keezer builds
• Multi-tap home bars
• Portable draught systems
• Force-carbonation setups

Additional components may include a gas line, disconnect, manifold, non-return valve and suitable pressure-rated keg.

Gas Manifold Compatibility

The regulator can supply a compatible gas manifold for running several kegs from one cylinder.

A manifold may divide the outlet into:

• Two gas lines
• Three gas lines
• Four gas lines
• Six or more gas lines

Standard manifolds normally deliver the same pressure to each outlet unless secondary regulators are installed.

Some manifold check valves may create a small pressure drop, so the regulator setting may need to be adjusted accordingly.

Always Use a One-Way Check Valve

A one-way check valve should always be installed to help protect the regulator from liquid travelling backwards through the gas line.

Liquid backflow may occur when:

• A keg is overfilled
• Keg pressure exceeds the regulator output
• The cylinder is turned off while kegs remain pressurised
• A keg is moved or tipped
• Beverage enters the gas dip tube
• Gas connections are removed incorrectly

Liquid entering a regulator can damage internal components and create contamination.

Regulator Installation

A general installation process includes:

1. Confirm that the cylinder valve and Type 30 stem are compatible.
2. Make sure the cylinder valve is closed.
3. Back the adjustment knob out to remove outlet pressure.
4. Inspect the cylinder connection and seal.
5. Connect the regulator securely.
6. Attach the gas line or outlet fitting.
7. Install a one-way check valve.
8. Open the cylinder valve slowly.
9. Turn the adjustment knob to set the required pressure.
10. Check all connections for leaks.

Follow the cylinder and regulator manufacturer’s instructions.

Setting the Outlet Pressure

To increase pressure, turn the adjustment knob gradually in the appropriate direction.

To reduce pressure:

1. Close or isolate the gas supply where required.
2. Turn the adjustment knob down.
3. Release excess downstream pressure.
4. Recheck the gauge.
5. Fine-tune the setting.

Simply turning the knob down may not immediately lower pressure already trapped in the gas line or keg.

Leak Testing

Always leak-test after:

• Installing the regulator
• Changing cylinders
• Replacing gas tubing
• Installing a manifold
• Changing outlet fittings
• Moving the system

Use a suitable leak-detection solution around:

• Cylinder connection
• Nut and stem
• Gauge threads
• Outlet fitting
• Check valve
• Gas-line connections

Never use a flame to test for gas leaks.

Protect the Regulator from Moisture

Keep the regulator away from:

• Beverage spills
• Cleaning chemicals
• Condensation
• Rain
• Liquid backflow
• Wet storage areas

If liquid enters the regulator, stop using it and arrange inspection or servicing.

Do not submerge the regulator for cleaning.

Cylinder Safety

Always:

• Keep cylinders upright
• Secure them against falling
• Store them away from heat
• Use them in a ventilated location
• Protect the cylinder valve
• Close the valve before servicing
• Transport cylinders securely
• Use only compatible gas fittings

Carbon dioxide can displace oxygen in enclosed areas, so good ventilation is essential.

Important Notes

• Type 30 nut and stem is included.
• Type 10 and Type 50 assemblies are sold separately where available.
• Confirm the selected outlet fitting before purchase.
• Use a one-way check valve at all times.
• Maximum operating pressure is 65PSI.
• Green 70PSI pressure relief valve is included.
• Never exceed the rating of connected equipment.
• Use the correct nut and stem for the selected gas.
• Do not allow liquid to enter the regulator.
• Leak-test every connection after installation.
• Gas cylinder, tubing, manifold and disconnects are not included unless specifically stated.

MKX Regulator for CO₂ combines a large brass body, dual filtration, protected gauges and fully encapsulated seat technology for dependable gas control. Its 65PSI operating range and interchangeable stem options make it a versatile choice for kegging, carbonation and selected multi-gas applications.