Sumitomo QT62 Internal Gear Pump | QT62-125F-BP-Z Servo Pump | QT62-80F/100F

LIC Hydraulic proudly offers the QT62 Series Internal Gear Pump, the industry-standard power source for high-end servo hydraulic systems. Unlike conventional gear pumps, the QT62 features a unique internal engagement mechanism that provides nearly pulse-free flow and exceptional quietness. The QT62-125F-BP-Z is specifically optimized for servo motor integration, allowing for extreme efficiency during high-pressure holding phases and rapid acceleration/deceleration cycles.

Key Technical Advantages

• Whisper-Quiet Operation: The internal gear profile ensures smoother tooth engagement, reducing fluid-borne noise to levels impossible for external gear or piston pumps.

• Ideal for Servo Systems: Designed to handle the erratic speed cycles of servo drives, from $50\text{ RPM}$ idling to $2500\text{ RPM}$ full-speed operation without losing volumetric efficiency.

• Minimal Pressure Ripple: Enhances the repeatability and precision of hydraulic cylinders, making it ideal for high-precision molding and forming.

• Compact & Robust: The high-strength housing and simplified internal parts ensure a compact footprint with maximum structural integrity.

Expert Maintenance Tips

• Hydraulic Fluid Quality: Use premium anti-wear hydraulic oil (ISO VG 46). Maintaining oil cleanliness at ISO 4406 17/15/12 is critical to prevent wear on the internal crescent seal.

• Suction Vacuum Check: Ensure the suction line is fully sealed. Internal gear pumps are highly sensitive to air ingestion, which causes “screaming” noise and rapid gear cavitation.

• Operating Temperature: Keep the oil temperature between $30\text{°C}$ and $50\text{°C}$. Excessive heat will thin the oil, leading to increased internal leakage and reduced efficiency in the QT62’s precision clearances.

QT62-125；QT33-10，

QT33-12.5，

QT33-16,

QT43-20,

QT43-25,

QT43-31.5,

QT53-40,

QT53-50,

QT53-63,

QT63-80,

QT63-100,

QT63-125.
QT42-31.5-BP
QT42-40-BP
QT52-50-BP
QT52-63-BP
QT42-28-BP-Z
QT42-28F-BP-Z
QT42-31.5-BP-Z
QT42-31.5F-BP-Z
QT42-40-BP-Z
QT42-40F-BP-Z
QT52-50-BP-Z
QT52-50F-BP-Z
QT52-63-BP-Z
QT52-63F-BP-Z
QT62-80-BP-Z
QT62-80F-BP-Z
QT62-100-BP-Z
QT62-100F-BP-Z
QT62-125-BP-Z
QT62-125F-BP-Z
QT52-40-BP-Z
QT63-80-BP-Z
QT63-100-BP-Z
QT63-125-BP-Z

QT4N-31.5-BP-Z
QT4N-31.5F-BP-Z
QT4N-40-BP-Z
QT5N-50-BP-Z
QT5N-63-BP-Z
QT6N-80-BP-Z
QT6N-100-BP-Z
QT6N-125-BP-Z
QT8N-200-BP-Z
QT8N-200F-BP-Z
QT8N-250-BP-Z
QT8N-250F-BP-Z
CQTM33-16V-3.7-2R-S1243-D
CQTM33-16V-3.7-2R-S1243-E
CQTM42-20FV-2.2-4-T-S1307J-D
CQTM42-20FV-4-T-S1264-D
CQTM43-20-3.7-1-T-S1
CQTM43-20F-3.7-1-T
CQTM43-20F-20F-3.7-1-T-S1307-D
CQTM43-20F-3.7-1-T-S1249-D
CQTM43-20F-3.7-1-T-S1307-D
CQTM43-25F-7.5-1-7-S1249-D
CQTM43-25FV-5.5-1-T-S1264-C
CQTM43-25FV-5.5-4-T
CQTM43-25FV-5-5-1-T-S1264-C
CQTM43-31.5F
CQTM43-31.5F-7.5-2-T
CQTM43-31.5F-5.5-4-T-M380
CQTM43-31.5F-5.5-4-T-M380-S1307-E
CQTM43-35FV-5.5-4-T-380
CQTM63-100F+15T
CQTM52-40FV+3.7-4-T-M-1307-A
CQTM54-50FV+15-2-T-M-S1307J-A

QT6252-125-63F-S1302-A
QT6252-100-63F-S1302-A
QT6262-125-100-S1044
QT6262-100-80-S1044
QT42-31.5F-S1334
QT62-100F-S1302-A
QT62-125F-S1302-A
QT6252-100-63F-HT
QT6252-125-63F-HT
QT62-80F-S1302-A
QT52-50F-S1302-A
QT52-63F-S1302-A
QT52-40F-S1302-A