Parker Denison T67DC T67DCW industrial vane hydraulic pump

T67DC-The Standard-Duty Workhorse

The base T67DC is a fixed-displacement pump (sizes 6 through 100, referencing displacement in cm³/rev). It thrives in clean, temperature-controlled environments running standard hydraulic oils (ISO VG 32–68). Typical applications include:

Machine tool hydraulics (lathes, grinders)

Automated assembly lines

Stationary industrial presses

T67DCW-The Heavy-Duty, Wide-Viscosity Variant

The T67DCW features a modified internal clearancing and thicker shaft bearings to handle:

Higher viscosity fluids (up to ISO VG 220, e.g., synthetic or fire-resistant fluids like HFD-R or HFA)

Intermittent cold starts where oil viscosity spikes

Higher contamination resilience (still not a “dirty oil” pump, but more forgiving)

Real-world example: A steel mill using an HFD-R fluid at 50°C will see 18% less internal leakage on a T67DCW compared to a standard T67DC, thanks to its optimized vane tip geometry.

Key Engineering Features That Drive Performance

Cartridge Design for Rapid Service

Both models use a drop-in cartridge kit (Parker part number pattern: T67DCF-). You can replace the vane, ring, rotor, and pressure plates in under 20 minutes without disturbing inlet/outlet piping. For a maintenance engineer, that’s uptime gold.

Low Noise, No Sacrifice

At 1800 RPM and 200 bar, the T67 series typically runs at 68–72 dBA—remarkably quiet for a vane pump. Compare that to an equivalent gear pump at 78–82 dBA. The reason? The balanced vane design reduces radial load, which cuts mechanical vibration.

Expert note: If your T67DC suddenly exceeds 78 dBA, check for vane tip wear or aeration (foaming oil). Don’t ignore it—noise is the first symptom of cavitation.

High Pressure, Moderate Speed

Max continuous pressure: 210 bar (3045 psi)

Max intermittent pressure: 240 bar (3480 psi)

Speed range: 600 to 2000 RPM (higher speeds reduce life due to vane lift-off)

At 2000 RPM, a size 60 T67DC delivers ~120 L/min (31.7 GPM) at 150 bar, with overall efficiency hovering around 88–91%.

Installation & Best Practices: What No One Tells You

Mounting Orientation Matters

Parker allows any mounting position, but horizontal with ports up is preferred. Why? Air purging. Vertical shaft-up mounts can trap air in the cartridge, leading to chattering and vane hammering on startup.

Inlet Strainer vs. Return Filter

Common mistake: using a fine suction strainer (under 100 micron). The T67DC requires an inlet vacuum below 0.7 bar absolute. A clogged 50-micron strainer will starve the pump. Instead, use a coarse suction strainer (150–200 micron) and place the 10–20 micron absolute filter on the return line.

Cold Start Protocol

Even the T67DCW hates being slammed from cold. Below 10°C oil temp:

1.Run the pump unloaded (discharge to tank) for 2–3 minutes

2.Check for erratic pressure or whining

3.Gradually load to 50% of max pressure over 5 minutes

Common Failure Modes (and How to Avoid Them)

1.Vane Tip Scoring

Cause: Oil viscosity too low (e.g., ISO VG 22 in summer) or chronic cavitation.

Fix: Switch to ISO VG 46 or 68. Inspect inlet piping for leaks.

2.Pressure Plate Grooving

Cause: Fine silt contamination (1–5 micron particles) eroding the wear plates.

Fix: Upgrade to a 3-micron beta-rated return filter. The T67DC cartridge plates are sacrificial—replace them every 8,000–10,000 hours in dirty environments.

3.Shaft Seal Leakage (T67DCW only)

Cause: Overpressurized case drain (should be <2 bar).

Fix: Ensure the drain line is ¾” or larger and runs straight to tank without restrictions.

For more information on the T67DC/T67DCW hydraulic vane pump, please visit https://www.baolilaihydraulic.com/product/.

Selection Table

Q1:What’s the most common size used in North American industry?

A1:The T67DC 45 (45.5 cm³/rev) and T67DC 60 (59.2 cm³/rev) account for over 60% of sales. They pair perfectly with 15–25 HP motors at 1800 RPM.

Q2:Can I replace a T67DC with a T67DCW without changing the motor?

A2: Yes. Both use the same SAE A 2-bolt or 4-bolt flange (option code -2 or -4). The W variant may draw 2–3% more torque at cold startup due to tighter clearances, but at operating temperature, power draw is identical.

Q3:How to purchase a T67DC/T67DCW hydraulic pump?

A3:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4:What is the price and delivery time of the T67DC/T67DCW hydraulic pump?

A4:The specific price and delivery time will be provided based on the specific model you provide.