NRGR04/06 Orifice

Description

NRGR04/06 Replacement Orifice for Norgas Gas Pressure Regulators

Official NGR04/06 Replacement Orifice Part. These are designed to control flow capacity and maximum allowable inlet pressure, ensuring proper regulator performance in natural gas, LPG, and other non-corrosive dry gas applications.

If your regulator is being resized, serviced, or rebuilt, selecting the correct orifice is critical to maintaining stable outlet pressure, proper lock-up, and safe system operation.

NRGR04/06 Replacement Orifice Sizes & Pressure Ratings

The NGR04 and NGR06 regulators share the same orifice sizes (springs differ by model). Each orifice directly affects inlet pressure capability and flow performance.

1/4″ Orifice (F0406A)
3/8″ Orifice (F0406B)
1/2″ Orifice (F0406C)
5/8″ Orifice (F0406D)
3/4″ Orifice (F0406E)
7/8″ Orifice (F0406F)

Refer to the regulator datasheet for inlet pressure limitations and capacity charts associated with each orifice size.

Selecting the correct orifice ensures the regulator operates within its rated inlet pressure and capacity range.

NRGR04/06 Replacement Orifice Installation Tool

For proper servicing of NGR04 and NGR06 regulator orifices, Norgas offers a dedicated orifice socket designed for safe removal and installation.

Using the correct service tool helps prevent rounding the orifice hex and ensures proper maintenance in the field. While standard deep sockets may physically fit, a properly sized service tool reduces the risk of damage during installation or removal.

We can supply the appropriate orifice socket upon request for contractors and maintenance teams working on NGR04 and NGR06 regulators.

How the NRGR04/06 Replacement Orifice Affects Regulator Performance

The orifice is one of the primary flow-controlling components inside a spring-loaded regulator. It determines the maximum flow capacity and allowable inlet pressure range.

Smaller orifices generally allow higher inlet pressure capability with lower total flow.
Larger orifices increase flow capacity but may reduce the allowable maximum inlet pressure rating.

Orifice selection should always be reviewed alongside:

• Inlet pressure
• Required outlet pressure
• Gas type
• System flow demand

Designed Specifically for NGR04 & NGR06 Regulators

These orifices are engineered for direct compatibility with:

• Norgas NGR04 Gas Pressure Regulators
• Norgas NGR06 Gas Pressure Regulators

Suitable for:

• Natural Gas
• LPG / Propane
• Other non-corrosive dry gases

Materials are selected for durability and long-term regulator reliability in commercial and industrial gas service.

Service, Maintenance & Replacement Applications

Common reasons customers replace an NGR0406 orifice include:

• Regulator rebuilds
• System pressure changes
• Flow capacity modifications
• Restoring original factory configuration
• Equipment upgrades

Replacing the orifice during major regulator servicing is often recommended when internal components are being inspected or rebuilt.

Important Installation Note

The NRGR04/06 Replacement Orifice sizing should always be confirmed against the NGR04 or NGR06 regulator datasheet before installation. Incorrect orifice selection can affect regulator stability, lock-up performance, and overall system operation.

If you are unsure which orifice your application requires, we can review your inlet pressure, outlet pressure, and gas type to help confirm the correct size.

In Stock & Ready to Ship

Process Valve & Equipment Co. has supported gas measurement applications since 1951.

Questions about sizing or compatibility?

Call 1-800-922-8897 and we will help confirm the correct NGR0406 replacement orifice before you order.