Overview

HV82, Needle Valve, 3/8 in NPTF Oil Port

Engineered for critical motion control in 70MPa hydraulic systems, the ULTPRE HV82 integrates leak-proof load holding with adjustable speed regulation. This dual-function valve ensures fail-safe security and precision movement in mobile machinery, industrial presses, and lifting equipment.

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Core Innovation Highlights
✅ Zero-Leak Needle Lock Technology

  • Precision-ground conical needle + hardened seat eliminates internal leakage (<0.05 mL/min @ 70MPa)

  • Metal-to-metal sealing withstands 200,000+ pressure cycles

✅ Speed-Controlled Hydraulic Management

  • Metered oil return enables precise cylinder extension/retraction rates

  • Prevents “free fall” in vertical cylinders or winch systems

✅ Anti-Tamper Security (Optional)

  • Locking nut configuration prevents unauthorized adjustment

  • Torque-limited handwheel maintains calibration under vibration

Ruggedized Construction
► 42CrMo Alloy Body: Electroless nickel plating (ENP) delivers 900HV surface hardness + 1,200hr salt spray resistance
► Extreme Environment Ready: FKM seals operate at -40°C to 200°C

Critical Safety Functions

  • Absolute Load Holding: Locks cylinders indefinitely during pump/hose failure

  • Runaway Prevention: Adjustable flow control eliminates uncontrolled descent

  • Overpressure Defense: Integrated relief valve options (20-70MPa)

Dimensions

–File NameFile Type
液压附件图册中文
Hydraulic Accessories BrochureEnglish