9F400S Parker Needle Valve Colorflow Flow Control 345 bar

Product Overview

The 9F400S is an in-line flow control valve from Parker Hannifin’s Colorflow F Series, a manually operated two-way metering valve that permits free flow in one direction and metered flow in the reverse direction via a precision needle valve.

The 9F400S belongs to Parker’s renowned “Colorflow” valve family, featuring F Series in-line mounting with a steel body and 1/4″ BSPP (G1/4) female-female ports. This valve is widely used for precise flow regulation in hydraulic and pneumatic systems across factory automation, machine tools, marine, material handling, mining, and other industries.

The valve combines a fully guided poppet with a standard metering needle. The fully guided design eliminates the wobble and erratic travel commonly found in ball check constructions, while the standard soft seat poppet provides near zero leakage sealing performance.

Our complete range of Parker flow control valves strictly adheres to OEM technical standards, achieving 100% direct interchangeability with original components. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring performance parameters are fully consistent with genuine Parker products. Direct replacement significantly reduces equipment downtime and maintenance costs.

⚠️ Brand and Model Attribution Note: The 9F400S belongs to Parker Hannifin, part of the Colorflow F Series in-line flow control valves. The series also includes variants such as 9F400S-V (FPM seals), 9F400S4F, and 9F400S4T.

⚠️ Model Code Decoding (using 9F400S as example) :

• 9 = Thread type code (9 = BSPP parallel thread)

• F = Product series (F Series flow control)

• 400 = Port size (400 = 1/4″)

• S = Body material (S = Steel)

• Suffix options: omitted = NBR seals; V = FPM seals; F = Knurled knob; T = Tamperproof

Technical Specifications

• Product Series: Parker Colorflow F Series In-line Flow Control Valve

• Model: 9F400S

• Brand: Parker Hannifin

• Product Type: In-line Flow Control Valve / Two-Way Metering Valve

• Poppet/Needle Type: Standard Needle + Fully Guided Poppet

• Maximum Operating Pressure: 345 bar (5000 psi)

• Maximum Flow Rate: 19 L/min (5 GPM)

• Cracking Pressure: 0.34 bar (5 psi)

• Port Type: BSPP (G1/4)

• Port Size: 1/4″

• Port Configuration: Female to Female

• Body Material: Steel

• Seal Material: NBR; Optional FPM (9F400S-V)

• Poppet Material: Metal

• Spring Material: 302 Stainless Steel

• Retainer/Needle Material: 416 Stainless Steel

• Operating Media: Hydraulic oil, Air

• Operating Temperature Range: -40°C to +121°C (-40°F to +250°F)

• Free Flow CV Factor: 1.56

• Control Flow CV Factor: 0.433

• Free Flow Orifice Area: 0.068 in²

• Control Flow Effective Orifice Area: 0.0194 in²

• Actuation Type: Manual Knob

• Locking Mechanism: Set Screw

• Mounting Type: Inline

• Brand: Colorflow

• Country of Origin: United States

• Weight: Approx. 0.23 kg (0.5 LB)

Key Technical Advantages

1. Bidirectional Flow Control – Free Flow and Metered Flow in Opposite Directions

The 9F400S is a two-way metering valve that allows completely free flow in one direction (via the fully guided poppet) and precise metered flow in the opposite direction (via the precision needle valve). This design makes it particularly suitable for single-direction speed control in hydraulic circuits—such as controlling cylinder feed speed while maintaining rapid return stroke.

2. Fully Guided Poppet Design – Eliminates Wobble and Erratic Travel

Parker’s exclusive fully guided poppet design eliminates the wobble and erratic travel commonly found in ball check constructions. This ensures consistent repeatability and reliability over long-term service, especially in high-vibration applications.

3. Near Zero Leakage Sealing Performance

The standard soft seat poppet provides near zero leakage sealing performance. In circuits requiring long-term pressure holding (such as clamping circuits and accumulator circuits), this characteristic effectively reduces system pressure loss and improves overall efficiency.

4. Rugged All-Steel Construction

The 9F400S features a steel body with 302 stainless steel spring and 416 stainless steel needle/retainer. With a maximum operating pressure of 345 bar (5000 psi) and temperature range of -40°C to +121°C, it maintains stable performance from extreme cold to high-temperature operations.

5. “Colorflow” Color-Band Indication – Visual Setting Confirmation

As a member of Parker’s “Colorflow” valve family, the valve features an exclusive color-band design that provides accurate visual indication of the setting. Operators can quickly confirm the current valve setting without relying on instruments, significantly improving on-site maintenance efficiency.

6. Set Screw Locking – Prevents Setting Drift

The valve is equipped with a set screw that locks the valve at the desired setting. In industrial environments with vibration, this design effectively prevents setting drift, ensuring long-term system stability.

7. 100% Direct Interchangeability and Simulated Condition Testing

The 9F400S strictly adheres to Parker original mounting dimensions and interface standards (G1/4 BSPP), enabling direct drop-in replacement of original valves without piping modification or system adjustment. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring consistent, stable performance at rated pressure and flow.

Application Areas

• Hydraulic Actuator Speed Control: Precise feed rate control for hydraulic cylinders with rapid return stroke

• Machine Tools: Flow control for hydraulic and pneumatic circuits in CNC machines and machining centers

• Factory Automation: Flow regulation for automated production line hydraulic and pneumatic systems

• Material Handling Equipment: Flow control for forklifts, lifts, and other material handling equipment

• Injection Molding: Flow regulation for injection molding and die-casting machine hydraulic systems

• Marine & Offshore: Flow control for marine hydraulic systems

• Mining Equipment: Flow regulation for mining machinery hydraulic systems

• Oil & Gas: Hydraulic and pneumatic control for oilfield equipment

• Power Generation: Flow control for power station hydraulic systems

Expert Maintenance Tips

1. Verify Model and System Compatibility Prior to Installation

The 9F400S features G1/4 BSPP (British Standard Parallel Pipe) ports. Confirm that the system piping connections match BSPP threads—BSPP and NPT threads are NOT interchangeable. Also verify that the maximum system pressure does not exceed 345 bar (5000 psi) .

2. Correct Installation Orientation

The 9F400S is a two-way metering valve with free flow in one direction and metered flow in the opposite direction. Confirm the valve orientation based on system requirements—free flow direction is through the poppet (low resistance), metered flow direction is through the needle valve (adjustable resistance). Follow flow direction markings on the valve body.

3. Installation Torque and Sealing

The 9F400S features G1/4 BSPP female threads. Use a torque wrench during installation to the torque value specified in Parker technical manuals. BSPP threads seal via bonded seal washers or O-ring face seals—PTFE tape and thread sealant must NOT be used, as they may contaminate internal valve passages.

4. Flow Setting and Commissioning

Set the flow rate via the manual knob:

• Rotate clockwise – reduces metering orifice (decreases flow)

• Rotate counterclockwise – increases metering orifice (increases flow)

• After setting, tighten the set screw to lock the setting

It is recommended to perform the setting at normal system operating pressure and flow to ensure metering characteristics meet actual application requirements.

5. Seal Material Selection

Standard 9F400S uses NBR seals, suitable for mineral-based hydraulic oils. For systems using phosphate ester hydraulic fluids or higher operating temperatures, select the FPM seal version 9F400S-V. Incorrect seal material selection will result in seal damage and leakage.

6. System Cleanliness Management

The 9F400S features precision needle valve construction and demands adequate oil cleanliness. Recommended system cleanliness: ISO 4406 Code 20/18/15 or higher. Install high-precision filters (filtration rating ≤10μm) upstream of the valve to prevent debris from jamming the needle or damaging the poppet sealing surface.

7. Periodic Functional Checks

Perform functional checks every 2,000 operating hours or annually: verify smooth flow adjustment, locking mechanism reliability, external leakage, and color-band indication clarity. If adjustment stiffness, setting drift, or abnormal leakage is observed, arrange for servicing or replacement.