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Watts Temperature and Pressure Relief Valve: Section XIII ASME Section - ASME Section XIII Temperature & Pressure Relief Valves
WattsASME Section XIII Temperature & Pressure Relief Valves

Watts Temperature and Pressure Relief Valve: Section XIII ASME Section

The WATTS Temperature and Pressure Relief Valve is an ASME Section XIII valve with a Copper Silicon Alloy body. This model, MPN 1-1/2 LF340-3-150/210FS, features FNPTF x FNPTF connections.

SKU 3G-OTH-430674

Brand
Watts
Item
Temperature and Pressure Relief Valve: Section XIII ASME Section
Category
ASME Section XIII Temperature & Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
1-1/2 LF340-3-150/210FS
Type
FNPTF x FNPTF
Body Material
Copper Silicon Alloy
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Temperature and Pressure Relief Valve is an ASME Section XIII valve with a Copper Silicon Alloy body. This model, MPN 1-1/2 LF340-3-150/210FS, features FNPTF x FNPTF connections.

Frequently Asked Questions

What is the WATTS LF340-3 temperature and pressure relief valve used for?

The WATTS LF340-3 is an ASME Section XIII temperature and pressure relief valve designed to protect water heaters and storage tanks from excessive temperature or pressure. It automatically opens to discharge water when unsafe conditions occur, preventing equipment damage or failure in commercial and industrial hot-water systems.

What are the specifications of the WATTS 1-1/2 LF340-3-150/210FS valve?

This WATTS valve has a Copper Silicon Alloy body with FNPTF x FNPTF connections. It is rated under ASME Section XIII for temperature and pressure relief. The manufacturer part number is 1-1/2 LF340-3-150/210FS. It is designed for use in hot-water systems requiring reliable overpressure and overtemperature protection.

Where to buy the WATTS LF340-3 temperature and pressure relief valve worldwide?

3G Electric supplies the WATTS LF340-3 temperature and pressure relief valve worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this ASME Section XIII valve.

How to install a WATTS temperature and pressure relief valve?

Install the WATTS valve in the designated tapping of the water heater or tank, ensuring the sensing element extends into the top 6 inches of the tank. Connect the FNPTF inlet to the tank and the outlet to a discharge pipe. Never install a shutoff valve between the relief valve and the tank. Follow local plumbing codes.

Used in

Common applications for Watts
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

Watts Products

3G Electric supplies Watts asme section xiii temperature & pressure relief valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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