High-pressure pressure relief valve MN-73Q

hydraulicin-linedifferential

Overview
The MN-73Q Quick Pressure Relief Valve is a hydraulically pilot-operated oblique-pattern globe valve that relieves excessive system pressure by fully opening when pressure exceeds the pre-set value. Its hydrodynamic body provides an unobstructed flow path and effective modulation capacity for high differential pressure applications. Designed for demanding waterworks and mining environments, it limits cavitation and noise while ensuring repeatable operation.

Features & Benefits

• Designed for demanding operating conditions
  • Tamper resistant design.
  • Anti-cavitation characteristics to reduce damage and wear.
  • Wide flow range for flexible system integration.
  • High stability and accuracy of setpoint operation.
  • Drip‑tight sealing.
• Double‑chamber actuator
  • Protected diaphragm design.
  • Moderated valve closing to avoid surges.
  • Actuator and seat unit removable as a single integral assembly for simplified in-line maintenance.
• Obstacle‑free flow path for optimized hydraulic performance.
• Balanced seal disc for high relief flow capacity.
• Manual test valve allows testing without changing setpoint.

Actuator Design

• Unitized seat and double‑chamber actuator that can be removed from the body as one integral unit.
• In-line serviceable design reduces downtime.
• Components selected for resistance to cavitation and operational stress.

Additional Features

• Hydrodynamic body profile minimizes internal obstructions.
• Balanced trim to maintain relief capacity at high differential pressures.
• Manual test valve for on-site functional checks without altering settings.

Applications
Suitable for municipal waterworks, large irrigation and industrial systems, and mining applications where high differential pressures, cavitation resistance and noise reduction are required.

Technical specifications

• Model: MN-73Q
• Series: 700 Sigma
• Product type: Quick Pressure Relief Valve (surge & pressure relief)
• Operation: Hydraulic, pilot‑operated
• Pattern: Oblique pattern, globe valve
• Actuator: Unitized seat assembly with double‑chamber actuator; removable as a single integral unit (in‑line serviceable)
• Body design: Hydrodynamic body for unobstructed flow and effective modulation
• Performance: Immediate full opening on pressure rise; high repeatability
• Key features: Anti‑cavitation design, tamper resistant, wide flow range, high setpoint stability, drip‑tight sealing, balanced seal disc, manual test valve
• Typical applications: Waterworks, irrigation, mining and industrial systems
• Materials: Selected materials compatible with mining and heavy‑duty water applications