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APOLLO Safety Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Cast Bronze - ASME Section IV Hot Water Pressure Relief Valves
APOLLOASME Section IV Hot Water Pressure Relief Valves

APOLLO Safety Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Cast Bronze

SKU 3G-OTH-429345

Brand
APOLLO
Item
Safety Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Cast Bronze
Category
ASME Section IV Hot Water Pressure Relief Valves
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Technical Specifications

APOLLO
Manufacturer Part Number
1740203
Type
3/4 in x 3/4 in, Cast Bronze
Max. Op Pressure
150 psi
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APOLLO Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is an APOLLO safety relief valve used for?

An APOLLO safety relief valve protects hot water heating systems from overpressure. It automatically opens at a set pressure to discharge excess water, preventing boiler or tank damage. This ASME Section IV rated valve is commonly installed on commercial and residential hydronic heating systems.

What are the specifications of the APOLLO 1740203 safety relief valve?

The APOLLO 1740203 is a 3/4 in MNPT x 3/4 in FNPT cast bronze safety relief valve with a maximum operating pressure of 150 psi. It is ASME Section IV certified for hot water service. The valve body is cast bronze for corrosion resistance in hydronic systems.

Where to buy APOLLO safety relief valves worldwide?

3G Electric supplies APOLLO safety relief valves worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote on the APOLLO 1740203 or other valve sizes and pressure ratings.

How to install an APOLLO safety relief valve?

Install the APOLLO safety relief valve in the hot water outlet line of the boiler or tank, with the valve stem vertical. Use pipe thread sealant on the MNPT connection. Ensure the discharge pipe is directed to a safe drain location and is not blocked. Test operation after installation.

Used in

Common applications for APOLLO
Water supply systems — APOLLO double check valve backflow preventers (Series 4A) for backflow protection in commercial buildings.
HVAC piping — APOLLO bronze ball valves (two-piece, FNPT) for shut-off and isolation in heating and cooling loops.
Irrigation networks — APOLLO double check valve assemblies (bronze, FNPT) to prevent contamination of potable water sources.
Process piping — APOLLO three-piece ball valves (full-port, sweat connections) for maintenance-friendly flow control in industrial lines.
Safety systems — APOLLO spring-return lever ball valves (bronze, FNPT) for fail-safe shut-off in fuel or gas applications.
Plumbing repairs — APOLLO repair kits (complete check kits) for servicing backflow preventers in existing installations.

APOLLO Products

3G Electric supplies APOLLO asme section iv hot water 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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APOLLO Safety Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, 15 psi Max. Op Pressure, Cast Bronze (MPN 13211B10). Key specifications — Brand: APOLLO.
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