Parker Denison T67DCC fixed displacement hydraulic pump

The Parker Denison T67DCC is a triple fixed displacement vane pump. Unlike variable displacement pumps that alter flow dynamically, a fixed displacement pump delivers a constant volume of fluid per revolution based on its internal geometry and the speed of the prime mover.

The Power of the Triple Vane Design

The "DCC" designation in the model nomenclature signifies the specific frame sizes of the three pumping cartridges integrated into a single housing.

"D" Cartridge: Represents the highest displacement section, typically positioned closest to the shaft to handle the primary high-pressure or high-flow circuit.

"C" Cartridges: The subsequent two letters represent smaller frame size cartridges, allowing for independent secondary and tertiary fluid circuits.

By combining three distinct pumping sections onto a single drive shaft, the T67DCC eliminates the need for complex multi-pump adapter gearboxes, significantly reducing the system's physical footprint and mechanical complexity.

Key Engineering Features

Double Lip Vane Technology: Denison’s proprietary vane design reduces internal leakage (by-pass) and drop-off at high pressures. This ensures a volumetric efficiency that frequently exceeds 94%.

Bimetallic Plates: The use of specialized bronze-faced steel wear plates enhances resistance to cold-start scoring and thermal shock.

Drop-In Cartridge Design: Maintenance is streamlined because the internal pumping elements can be replaced as complete assemblies without removing the pump housing from the machinery.

Engineering Applications

The triple-flow configuration of the Parker Denison T67DCC makes it uniquely suited for complex machinery requiring isolated fluid streams operating at different pressures or flow rates.

Example 1: Heavy Duty Injection Molding Machines

In plastic injection molding, different phases of the cycle require wildly divergent fluid dynamics.

The "D" section can be utilized for high-flow, lower-pressure mold closing and opening sequences.

The first "C" section provides the high-pressure, low-flow hold metric required during the actual polymer injection phase.

The final "C" section can continuously run an independent low-pressure oil filtration and cooling loop, protecting the system from thermal degradation without robbing power from the main cycle.

Example 2: Mobile Construction and Drilling Rigs

On a modern track-mounted drilling rig, space is at a premium. The T67DCC allows a single diesel engine power take-off (PTO) to run three separate functions simultaneously:

1.Primary winch/rotary head operation (High displacement "D" section).

2.Mast positioning cylinders (Secondary "C" section).

3.Auxiliary cooling or tool attachment circuits (Tertiary "C" section).

Best Practices for Installation and Maintenance

To prevent premature component failure—often caused by cavitation, aeration, or particulate contamination—system designers and technicians must follow rigorous maintenance protocols.

Fluid Cleanliness is Paramount

Vane pumps rely on micro-scale fluid films to lubricate the vane tips as they track the cam ring. Particulate contamination acts as an abrasive, rapidly destroying this boundary layer.

Target Cleanliness: Maintain a minimum ISO 4406 cleanliness code of 17/15/12.

Filtration: Implement a high-efficiency return-line filter and a pressure-line filter prior to sensitive proportional valves downstream.

Managing Inlet Conditions

Because fixed displacement pumps pull fluid naturally via atmospheric pressure differentials, keeping inlet restrictions to a minimum is crucial to prevent cavitation.

Ensure suction lines are perfectly sealed; even a microscopic air leak will cause aeration, leading to erratic pressure spikes and severe acoustic noise.

Avoid using fine mesh suction strainers inside the reservoir if they cannot be easily serviced, as a clogged strainer will rapidly destroy the pump's internal suction balance.

For more information on the T67DCC hydraulic vane pump, please visit https://www.baolilaihydraulic.com/product/.

Selection Table

Q1:What is the difference between a Parker Denison T67DCC and a standard single vane pump?

A1:The T67DCC integrates three distinct vane pumping sections (one "D" size and two "C" sizes) into one physical housing on a single shared drive shaft. A standard single pump only features one displacement mechanism, meaning it can only supply a single independent fluid circuit.

Q2:Why is my T67DCC pump making a high-pitched whining noise?

A2:A high-pitched whine is a textbook symptom of either cavitation (fluid starvation due to a restricted inlet line or high fluid viscosity) or aeration (air leaking into the suction side). Check for restricted suction hoses, clogged breathers, or low reservoir oil levels immediately to avoid catastrophic internal failure.

Q3:How to purchase a T67DCC 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 T67DCC hydraulic pump?

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