Description

NGR04 Adjustment Spring for Norgas Regulators

Selecting the correct NGR04 Adjustment Spring is one of the most important steps in setting outlet pressure. Each spring color corresponds to a defined outlet pressure range, allowing precise and stable gas pressure control for natural gas, LP gas, and other non-corrosive fuel gases.

These springs are specifically designed for the Norgas NGR04 gas pressure regulator and are used during regulator servicing, outlet pressure changes, rebuild applications, and system reconfiguration.

NGR04 Spring Ranges & Part Numbers

Each spring range is engineered to provide a specific outlet pressure adjustment window. Proper spring selection ensures stable regulation, correct lock-up, and reliable downstream performance.

Brown Spring (S04A) — 3” W.C. to 7” W.C.
Commonly used for lower outlet pressure natural gas appliance applications and light commercial gas systems.

Gray Spring (S04B) — 4” W.C. to 13” W.C.
Provides a wider adjustment range for applications requiring moderate low-pressure control.

Black Spring (S04C) — 9” W.C. to 14” W.C.
Used where mid-range outlet pressure settings are required within commercial gas installations.

Blue Spring (S04D) — 9” W.C. to 15” W.C.
Offers slightly extended upper range flexibility compared to S04C for specific pressure requirements.

Silver Spring (S04E) — 12” W.C. to 20” W.C.
Well suited for higher outlet pressure commercial applications requiring increased adjustment range.

HP Red/Gray Spring (S04F) — 13” W.C. to 28” W.C.
Designed for elevated outlet pressure configurations within the NGR04 regulator platform.

HP Yellow Spring (S04G) — 1 to 2 PSIG
Used in higher pressure industrial gas applications requiring PSI-level outlet control.

HP Red Spring (S04H) — 1 to 2.5 PSIG
Provides extended PSI-level outlet pressure capability for industrial burner and specialty gas systems.

Designed Specifically for the NGR04 Gas Pressure Regulator

These adjustment springs are engineered for direct compatibility with the NGR04 gas pressure regulator only.

Important:
NGR04 springs are not interchangeable with NGR06 regulators. Spring selection should always match the exact regulator model and required outlet pressure range.

Using the correct spring ensures:

• Accurate outlet pressure setting

• Stable regulator performance

• Proper lock-up characteristics

• Long-term internal component reliability

NGR Regulator Spring Adjustment Tool (NGR-SPTOOL)

The NGR-SPTOOL is the dedicated spring adjustment tool designed for Norgas NGR Series regulators, including the NGR04. This tool allows safe and controlled adjustment of the regulator spring setpoint without damaging the adjustment mechanism.

Built specifically for NGR regulators, it provides a proper fit on the spring adjustment assembly, helping technicians make accurate outlet pressure adjustments during commissioning, maintenance, or spring replacement.

Product Details:
• Model: NGR-SPTOOL
• Application: NGR Series Regulators (NGR02, NGR04, NGR06, NGR08)
• Function: Spring setpoint adjustment

Why It Matters:
When installing or changing a regulator spring, outlet pressure must be re-set and verified using a calibrated gauge or manometer. The proper adjustment tool ensures accurate spring tensioning and prevents damage that can occur when using improper tools.

Optional Add-On:
The NGR-SPTOOL can be added to your spring order so technicians have the correct tool on hand during installation or servicing.

Easy Service & Field Replacement

Spring replacement is a standard procedure when:

• Adjusting outlet pressure ranges
• Rebuilding regulators
• Configuring a regulator for a new application
• Performing preventative maintenance

Keeping the correct NGR04 spring on hand allows technicians to adjust regulator setpoints without replacing the entire regulator assembly.

Stocking & Availability

NGR04 adjustment springs are available as factory-order components with typical lead times of approximately 2–4 business days, depending on availability.

Bulk quantities are available for contractors, OEM skid builders, utilities, and service companies.

Technical Support From a Real Gas Equipment Distributor

Process Valve & Equipment Co. supports contractors, utilities, and industrial gas customers with regulator selection, spring sizing, and application guidance.

If you are unsure which NGR04 spring range matches your outlet pressure requirements, we can help confirm compatibility before ordering.

Questions? Call 1-800-922-8897 for assistance with NGR04 adjustment spring selection.