Parker B511BCNXXC Solenoid Valve 1/4 Inch Npt Normally Open

Product Description

The PARKER B511BCNXXC is a 1/4 inch NPT solenoid valve designed for fluid and gas control in industrial and mechanical systems. In its unactuated state, flow passes normally open through ports 1 and 2, making it suitable for fail-open applications where flow must continue during power loss. The aluminum body keeps weight low while the Buna-N seal provides reliable resistance to a broad range of media. Operating pressure ranges from 20 psi to 145 psi, and the maximum working temperature is 120 degrees F. A licensed technician or qualified mechanic typically installs this valve in pneumatic, hydraulic, or process-control lines.

This valve fits residential and light commercial applications where a compact, 1/4 inch NPT normally open solenoid is required. Typical install scenarios include HVAC controls, fluid handling panels, and automated process lines. The normally open configuration through ports 1 and 2 makes it well suited for safety-critical circuits that require unrestricted flow when the coil is de-energized. Note that solenoid coils are not included and must be ordered separately to complete the assembly.

Key Features

• Normally open through ports 1 and 2 in unactuated state — supports fail-open circuit designs
• 1/4 inch NPT port size for direct threaded installation into standard pipe fittings
• Aluminum body construction reduces overall assembly weight
• Buna-N seal material compatible with a wide range of fluids and gases
• Operating pressure range of 20 psi to 145 psi
• Coil included with valve body; solenoid coils are not included and must be sourced separately

Compatibility

Designed as an OEM-style replacement or new-installation solenoid valve for 1/4 inch NPT normally open pneumatic, hydraulic, and fluid-control systems requiring an aluminum body and Buna-N seals.

Installation Notes

Installation should be performed by a qualified technician or licensed pipefitter familiar with the system media and pressure requirements. Depressurize and de-energize the system completely before removing or installing the valve. Apply appropriate thread sealant to NPT connections and avoid over-tightening, which can crack the aluminum body. Verify that the coil assembly is compatible and properly rated before energizing the circuit.