TDA032EW09B2NXW21 Parker Proportional Throttle Valve 950 L/min

Product Overview

The TDA032EW09B2NXW21 is a Parker Hannifin TDA Series 2/2-way proportional throttle valve designed for high-flow hydraulic control. It uses a slip-in cartridge configuration with a cavity and mounting pattern according to ISO 7368. Parker specifies the TDA range for controlling large oil flows in industrial hydraulic systems.

The TDA design uses a three-stage hydraulic control architecture. The first stage is a proportional solenoid-operated pilot stage, followed by a control spring and sequence spool, while the final stage is the main poppet installed in the sleeve. The proportional solenoid controls the pilot spool, which regulates the sequence spool and ultimately determines the main poppet opening area.

For TDA032EW09B2NXW21, the nominal size is NG32 and the Parker specification lists a nominal flow of 950 L/min at Δp = 10 bar. Ports A, B and X are rated up to 350 bar, while port Y is limited to 10 bar.

The same TDA configuration is also available in TDA040EW09B2NXW21 and TDA050EW09B2NXW21, corresponding to NG40 and NG50 sizes and higher nominal flow capacities.

For replacement applications, the ISO 7368 cartridge interface provides an important basis for interchangeability, but complete replacement verification should include cavity dimensions, flow direction, pilot configuration, seal material and solenoid voltage.

Technical Specifications

TDA032EW09B2NXW21

• Manufacturer: Parker Hannifin
• Series: TDA
• Valve Type: 2/2-Way Proportional Throttle Valve
• Full Model: TDA032EW09B2NXW21
• Nominal Size: NG32
• Valve Design: Slip-in Cartridge
• Mounting Standard: ISO 7368
• Nominal Flow: 950 L/min
• Flow Test Condition: Δp = 10 bar
• Maximum Operating Pressure, A/B/X: 350 bar / 5075 psi
• Maximum Pressure, Y: 10 bar / 145 psi
• Minimum Pilot Pressure: >25% of system pressure
• Minimum Operating Pressure, A→B: 10 bar
• Minimum Operating Pressure, B→A: 15 bar
• Recommended Viscosity: 30–80 cSt
• Permitted Viscosity: 20–380 cSt
• Fluid Temperature: 0–60°C
• Ambient Temperature: -20–80°C
• Filtration: ISO 4406:1999, 18/16/13
• Pilot Leakage X→Y at 100 bar: <1.5 L/min
• Opening Point: approximately 30% of nominal current
• Manufacturing Tolerance: ±5% of Qnom
• Typical Response Time for NG32: approximately 30 ms
• Duty Ratio: 100% ED
• Protection Class: IP65 when properly plugged and mounted
• Recommended Power Amplifier: PCD00A-400
• Solenoid Connection: EN 175301-803
• Solenoid Code X: 16 VDC
• Valve Weight: 5.8 kg
• Displacement: Not applicable
• Rated Speed: Not applicable

Parker’s official catalogue specifies the NG32 flow, pressure, response, electrical and weight data listed above.

TDA040EW09B2NXW21

• Nominal Size: NG40
• Nominal Flow: 1400 L/min at Δp = 10 bar
• Maximum Pressure, A/B/X: 350 bar
• Maximum Pressure, Y: 10 bar
• Weight: 9.2 kg
• Solenoid Code X: 16 VDC
• Mounting: ISO 7368 slip-in cartridge

TDA050EW09B2NXW21

• Nominal Size: NG50
• Nominal Flow: 2300 L/min at Δp = 10 bar
• Maximum Pressure, A/B/X: 350 bar
• Maximum Pressure, Y: 10 bar
• Weight: 15.0 kg
• Solenoid Code X: 16 VDC
• Mounting: ISO 7368 slip-in cartridge

Key Technical Advantages

1. High-flow proportional control

The TDA series is specifically designed for large-volume hydraulic flow control. The NG32 model handles 950 L/min, while NG40 and NG50 versions provide 1400 and 2300 L/min respectively at the specified differential pressure.

2. Three-stage hydraulic amplification

The combination of proportional pilot control, sequence spool regulation and the main poppet provides hydraulic amplification between the electrical control signal and the large main flow path. This architecture allows the TDA to control very large hydraulic flows with a proportional solenoid.

3. High differential-pressure capability

The TDA series permits differential pressure up to 350 bar / 5075 psi, allowing the valve to operate in demanding high-pressure industrial hydraulic circuits.

4. High resolution and repeatability

Parker highlights the TDA series for high resolution and reproducibility. These characteristics are particularly valuable in forming and molding equipment where stable hydraulic flow control directly influences machine cycle consistency.

5. Fail-safe behavior

The TDA incorporates a fail-safe function in the event of power failure, improving its suitability for industrial systems where predictable valve behavior during electrical faults is important.

6. Standardized ISO 7368 cartridge installation

The standardized cavity and mounting interface simplifies integration into hydraulic manifolds and supports replacement-oriented system design.

7. Reduced pilot-oil requirement

The TDA design is optimized to require relatively little pilot oil, supporting efficient control of high hydraulic flow rates.

Application Areas

Typical applications include:

• Hydraulic presses
• Press control systems
• Injection molding machines
• Die casting equipment
• Metal forming machinery
• Industrial hydraulic power units
• High-flow hydraulic test systems
• Large hydraulic actuator systems
• Process-controlled hydraulic machinery

Parker specifically lists general presses, die casting and injection molding among the intended application areas for TDA proportional throttle valves.

Expert Maintenance Tips

Verify the ISO 7368 cavity

Because the TDA is a slip-in cartridge valve, replacement should be based on the actual cavity and mounting configuration rather than the nominal NG size alone.

Maintain adequate pilot pressure

Parker specifies minimum pilot-pressure requirements to ensure that the main poppet can close safely. For NG16–NG40 valves, the pilot pressure must be at least 25% of the relevant pressure in the draining line; larger NG50–NG100 models require a higher ratio.

Maintain oil cleanliness

The recommended filtration level is ISO 4406 18/16/13. Clean hydraulic oil is essential because contamination can affect all three control stages: the proportional pilot spool, sequence spool and main poppet.

Keep pilot drain pressure within limits

Port Y is limited to 10 bar maximum. Excessive back pressure in the pilot drain circuit can affect the internal control balance and valve response.

Match the solenoid voltage

The X code identifies the 16 VDC proportional solenoid configuration. The electrical control system and recommended amplifier must match the selected valve configuration.

Commission large-flow valves progressively

After installation, start with reduced pressure and flow, verify pilot and drain connections, confirm the A/B flow direction, and progressively increase operating conditions. This is particularly important for NG40 and NG50 versions because of their very high nominal flow capacities.