Description

N5 OPD Gas Pressure Regulator

The Norgas N5 OPD Gas Pressure Regulator is an ANSI Z21.80 certified self-operating two-stage regulator with integrated overpressure protection (OPD). Designed for residential, commercial, and light industrial gas service, the N5 OPD series provides stable outlet pressure control while limiting downstream pressure to 2 psig per ANSI Z21.80 requirements.

Unlike standard line regulators, the N5 OPD incorporates an internal overpressure protection mechanism that helps prevent excessive downstream pressure conditions. This design allows the regulator to safely protect gas appliances and piping systems in applications where pressure must be controlled within defined safety limits.

The regulator is supplied with a vent limiter installed as standard, allowing indoor installation without the need for external vent piping while maintaining OPD functionality.

Norgas Regulator Sizing Tool

To ensure your N5 OPD Gas Pressure Regulator meets your system’s requirements, use the Norgas Regulator Sizing Tool.

1. Gas Type – natural gas, LPG, or other non-corrosive dry gases
2. Inlet Pressure – the upstream pressure entering your regulator
3. Desired Outlet Pressure – the pressure you need downstream
4. Flow / System Capacity – the required gas flow rate for your application
5. Pipe Connection Size – to match your system piping

Vent Limiter for Indoor Installation

All N5 OPD regulators are supplied with a vent limiter installed. The vent limiter allows the regulator to be installed indoors without routing vent piping outdoors.

This simplifies installation in locations such as:

• Residential gas appliance supply

• Mechanical rooms

• Commercial kitchens

• Indoor equipment gas supply

• Building gas service installations

For outdoor installations, a vent cap or vent elbow may be used depending on installation orientation.

Dual-Stage Pressure Regulation

The N5 OPD uses a two-stage regulation design that improves pressure stability while providing integrated overpressure protection.

Key benefits include:

• More stable outlet pressure control

• Improved system safety

• Reduced risk of downstream overpressure

• Simplified installation compared to external protection devices

Outlet Pressure Range

The N5 OPD series supports outlet pressure ranges between:

7″ W.C. to 14″ W.C.

Spring options include:

Silver Spring (S)
7″ W.C. – 11″ W.C.

Yellow Spring (Y)
12″ W.C. – 14″ W.C.

These ranges are commonly used in residential and commercial appliance supply applications.

Key Features of the N5 OPD Gas Pressure Regulator

• ANSI Z21.80 certified gas pressure regulator

• Integrated Overpressure Protection Device (OPD)

• Dual-stage pressure regulation

• Vent limiter installed as standard

• Indoor installation without external vent piping

• Multi-position installation capability

• Extended corrosion resistance

N5 OPD Gas Pressure Regulator Specifications

Pipe Sizes

3/8″, 1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, and 2″ NPT

Maximum Inlet Pressure

10 psig

Outlet Pressure Range

7–11 In. W.C. / Silver Spring (S)

12–14 In. W.C. / Yellow Spring (Y)

Maximum Emergency Inlet Exposure Pressure

85 psig (inlet side only)

Ambient Temperature Range

-40°F to +212°F

Gas Types

Natural gas, LPG, air, and other dry non-corrosive gases

Mounting Positions

Horizontal or vertical installation

Available Options

The N5 OPD regulator can be configured with the following accessories:

Vent Cap
Protects the vent opening for outdoor installations.

Vent Elbow
Allows proper vent orientation depending on regulator mounting position.

Typical Applications

The N5 OPD Gas Pressure Regulator is commonly used in:

• Residential gas distribution systems

• Commercial appliance gas supply

• Building gas service regulation

• Mechanical room installations

• Indoor gas systems requiring integrated overpressure protection

PRODUCT LITERATURE

N5 OPD Gas Regulator Product Literature (PDF)

Norgas regulators are manufactured by NMT® (Norgas Measurement Technologies) and are widely used in residential, commercial, and industrial gas distribution systems. Known for quick delivery, reliable pressure control, and durable construction, Norgas products are trusted by utilities, contractors, and equipment manufacturers across North America.

Learn more about the manufacturer and their full line of gas regulators at the official Norgas website