Marshall Excelsior ME449 Brass LPG Liquid Transfer Valve 3/4″ MNPT x 3/4″ FNPT

Brand: Marshall Excelsior / MEC

MPN: ME449

Type: Liquid Transfer / Angle Transfer Valve

Material: Brass

Application: LPG / Propane liquid transfer

Suggested eBay Title:

Marshall Excelsior ME449 Brass LPG Liquid Transfer Valve 3/4″ MNPT x 3/4″ FNPT

Key Features

• 3/4″ Male NPT inlet × 3/4″ Female NPT outlet
• Durable brass construction intended for LPG service; MEC notes brass versions are not compatible with NH3 service.
• 1/4″ FNPT side port supplied plugged for convenient accessory connection.
• Double O-ring stem seal helps provide leak-resistant operation through temperature fluctuations.
• Back-seat stem and swivel seat disc improve durability.
• Double-lead stem thread provides quick operation, going from closed to fully open in approximately 6 full turns.
• Standard ME449 does not include an integral excess-flow valve; applications require appropriate excess-flow protection.
• Made in USA.

Description

The Marshall Excelsior ME449 is a heavy-duty brass liquid transfer valve designed for LPG/propane tank evacuation and transfer applications. It features 3/4″ MNPT × 3/4″ FNPT connections, a plugged 1/4″ FNPT side port, double O-ring stem sealing, a back-seat design, and a swivel seat disc for reliable operation. It is commonly used when liquid must be withdrawn from a stationary propane tank during emergency service or tank relocation.

Important: Liquid LPG transfer should only be performed by properly trained personnel using the correct withdrawal adapter and required safety equipment.

ME449 Key Features

• Heavy-duty brass construction for reliable LPG/propane service
• 3/4″ Male NPT inlet
• 3/4″ Female NPT outlet
• 1/4″ FNPT auxiliary side port, supplied plugged
• Angle-pattern design for convenient transfer-line installation
• Double O-ring stem seal helps minimize leakage
• Back-seat stem design provides dependable valve operation
• Swivel seat disc promotes positive shutoff and longer service life
• Quick-opening double-lead stem thread — approximately 6 turns from closed to fully open
• Designed for LP-Gas liquid transfer and tank evacuation applications
• Rugged construction suited for commercial and industrial propane systems
• Marshall Excelsior (MEC) ME449 valve
• Made in USA