Description
The Parker F400B is an in-line hydraulic flow control valve designed to provide precise manual metering of fluid flow in industrial hydraulic and pneumatic systems. The F400B features a one-way flow control configuration with free reverse flow and supports up to 5 gpm maximum flow at pressures up to 2000 psi. It is constructed with a brass body and NPT threaded ports for reliable integration into control circuits.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Parker |
| Category |
Valves |
| Part Number |
F400B |
| Subcategory |
Flow Control Valve |
| Valve Series |
F Series Colorflow |
| Valve Type |
In-Line Needle Flow Control Valve |
| Control Direction |
One-Way with Free Reverse Flow |
| Function |
Manual Flow Control Metering |
| Maximum Flow Rate |
5 gpm (19 L/min) |
| Maximum Operating Pressure |
2000 psi (13.79 MPa) |
| Cracking Pressure |
5 psi |
| Connection Type |
Female NPTF Threaded Ports |
| Port Size |
1/4 Inch |
| Body Material |
Brass |
| Seal Material |
Nitrile (NBR) |
| Poppet Style |
Soft Seat Guided Poppet |
| Operating Temperature Range |
-40°F to 250°F (-40°C to 121°C) |
| Knob Type |
Standard Manual Adjustment |
| Weight |
2.00 lbs |
Information About F400B
The F400B is part of Parker’s F Series Colorflow flow control valve lineup, engineered for accurate metering and stable adjustment in general hydraulic applications. It uses a standard metering needle and a fully guided soft seat poppet design to ensure near-zero leakage and smooth reverse free-flow operation. The valve is manually actuated with a standard knob and includes Parker’s Colorflow band indicator for clear visual reference of the flow setting. With female-to-female 1/4" NPT connections, brass construction, and nitrile sealing, it is suitable for factory automation, machine tools, material handling, and industrial fluid control systems.
Key Features:
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In-Line Flow Control Valve Design: Provides manual metering for hydraulic and pneumatic flow regulation.
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One-Way Controlled Direction: Allows metered flow in one direction with free reverse flow capability.
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High Pressure Operation Rating: Supports maximum working pressure up to 2000 psi.
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Maximum Flow Capacity: Rated for up to 5 gpm (19 L/min) flow control performance.
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Soft Seat Guided Poppet: Fully guided poppet design minimizes leakage and improves durability.
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Standard Needle Metering Adjustment: Includes a standard needle for precise and repeatable flow setting.
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Brass Body Construction: Provides corrosion-resistant performance in industrial fluid applications.
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Colorflow Visual Indicator Feature: Color-band marking provides accurate visual indication of adjustment position.
The F400B delivers the reliability and precision required for manual hydraulic flow control and industrial metering valve applications.
