IMPCO Garretson KN 039-122 Low Pressure LPG Natural Gas Vapor Regulator w/ Prime

The Century Fuel KN 039-122 Vapor Regulator is designed for use in propane, LP gas, and natural gas vapor-phase systems. Built with a heavy-duty cast aluminum body, this regulator ensures consistent and safe vapor fuel delivery for industrial engines, generators, and propane-powered equipment.Key Features:Vapor-only regulator for propane, LP gas, and natural gasEnsures consistent pressure regulation and flow controlHeavy-duty cast aluminum construction with steel componentsOEM-compatible design for direct replacementTrusted in forklifts, industrial vehicles, and stationary power systemsApplications:LP Gas & Propane EnginesNatural Gas Vapor SystemsForklifts & Material Handling EquipmentIndustrial Generators & Stationary EnginesOEM Replacement for Vapor RegulatorsSpecifications:Brand: Century FuelPart Number (MFG#): KN 039-122Type: Vapor RegulatorSuitable Media: Propane, LP Gas, Natural Gas (Vapor Phase)Condition: Brand NewThis KN 039-122 vapor regulator is a trusted component for ensuring safe and efficient propane/natural gas operation in demanding industrial environments.

Important Notice – Propane Parts, Accessories, and Regulators

This product, including but not limited to propane parts, accessories, fittings, hoses, valves, and regulators, must be installed and serviced by a licensed professional in accordance with all applicable local, state, and federal codes, regulations, and standards.

The seller assumes no responsibility for the installation, inspection, application, maintenance, or use of this product.

It is the sole responsibility of the buyer to ensure the product is appropriate for their intended application and that it is installed correctly by a qualified individual.

Improper installation, maintenance, or use of propane products may result in serious injury, death, fire, explosion, or property damage.

The buyer accepts all risks, liabilities, and potential consequences associated with the use of this product.

By purchasing this item, the buyer acknowledges that they have read, understood, and agreed to these terms and confirm that installation and use will be conducted by a properly licensed and qualified professional.

The IMPCO catalog identifies 039-122 as a Model KN secondary low-pressure gas regulator with a manual primer, 6-oz spring, 3/4″ NPT inlet, 3/8″ NPT outlet, and 7/16″ orifice. It rates the model around 40 HP on LPG and 25 HP on natural gas.

Description

The KN 039-122 Vapor Only Regulator is a sensitive low-pressure fuel regulator/zero governor designed for gaseous-fuel engine applications.

It is suitable for LP propane vapor or natural gas and features a 3/4″ FNPT inlet, 3/8″ FNPT outlet, 7/16″ orifice, and manual primer. Its sensitive demand-regulator design makes it particularly suitable for small engines, generators, standby power equipment, and similar gaseous-fuel applications.

Key Features:

• KN / 039-122 configuration
• Vapor service only
• LP propane or natural gas
• Low-pressure demand regulator / zero governor
• 3/4″ FNPT inlet
• 3/8″ FNPT outlet
• Manual primer
• 7/16″ orifice
• 6 oz regulator spring
• Approx. 40 HP LPG capacity
• Approx. 25 HP natural-gas capacity
• Suitable for generators and small industrial engines

Brand	Century Fuel Products / Garretson-IMPCO Style
MPN	039-122
Model	KN
Type	Low Pressure Vapor Regulator / Zero Governor
Fuel Type	LPG / Propane Vapor & Natural Gas
Inlet	3/4″ Female NPT
Outlet	3/8″ Female NPT
Maximum Inlet Pressure	8 oz / approx. 0.5 PSI
Typical Working Inlet Pressure	9–13″ W.C.
Spring	6 oz Green
Orifice	7/16″
Primer	Manual
Propane Capacity	Approx. 40 HP standard
Natural Gas Capacity	Approx. 25 HP standard
Application	Small engines, generators & industrial engine fuel systems
Fuel State	Vapor Only