3/8'' 24V AC Electric Brass Solenoid Valve N/O

Technical Details

Product Overview

The BZW-10K-24VAC is a durable 3/8" brass solenoid valve engineered for fail-open, zero-differential fluid control in 24V AC low-voltage systems. Featuring a high-performance Viton® (FKM) diaphragm seal and a direct-assisted lift mechanism, this 2-way Normally Open (N/O) valve remains open when de-energized to permit unrestricted flow at 0 PSI, closing in less than one second when 24V AC power is applied.

Normally Open Application & Media Notice:

• • • This valve is Normally Open (remains open when de-energized and closes when energized). It is designed specifically for fail-open setups, gravity-fed drains, freeze/overheat protection loops, and safety bypass lines. Built with a solid brass body and a Viton® (FKM) diaphragm rated up to 250°F for water, compressed air, diesel fuel, and glycol.
    • Brass is not recommended for salt water, deionized water, or aggressive acids.
    • Always verify chemical compatibility before installation.

Key Features

• Solid Brass Body & Viton® Seal: Excellent mechanical durability and thermal resistance (up to 250°F) for water, air, diesel fuel, and neutral gases.

• Normally Open (Fail-Open) Operation: Keeps fluid flowing or lines drained during power interruptions—essential for emergency dump lines and HVAC freeze-protection circuits.

• 24V AC Low-Voltage Control: Integrates directly with standard HVAC transformers, Building Management Systems (BMS), 24VAC irrigation timers, and control relays via non-polarized lead wires.

• Zero Differential Operation: Direct-assisted design operates reliably from 0 PSI (gravity feed) up to maximum working pressure.

• Fast-Acting & Continuous Duty: Closes in under one second when energized and rated for 100% continuous-duty operation.

Common Applications

• Commercial laundry machine fill lines, rinse cycle water control, and inlet shutoff

• Industrial humidifier feed lines, reservoir make-up water control, and humidification system shutoff

• Auxiliary diesel fuel transfer bypass, generator fuel lines, and glycol circulation

• Commercial dispensing equipment, high-temp dump lines, and gas purge loop

• Batch dispensing lines, dosing pump feed control, and metered fill and top-up stations

• 24V AC automated hydroponics, fertigation loops, and liquid chemical bypass manifolds

• Process water branch line control, tank fill and transfer, and recirculation loop isolation

Installation

• Align media flow with the directional arrow cast into the brass body.
• The non-polarized 24V AC lead wires can connect to either AC supply conductor.
• For optimal service life and reliable seal closure, especially in gravity-fed drain lines, mount the valve with the coil facing upward.
• Install an inline strainer upstream to keep sediment off the Viton® diaphragm.

Warranty