Product Overview

The H41H Lift Check Valve features a vertical lift design with flanged connections. The disc moves vertically along the valve body axis, automatically opening/closing based on medium pressure to effectively prevent backflow. Specially designed for high-pressure and high-temperature applications in petroleum, chemical, and power industries.

Key Features

• High Pressure Resistance– Withstands up to PN160 (Class 900LB)
• High Temperature Endurance– Alloy steel construction for 550℃ operation
• Zero-Leakage Seal– Metal-to-metal hard sealing ensures tight shut-off
• Low Flow Resistance– Straight-through flow path minimizes pressure drop
• Wear-Resistant– Guided disc movement reduces operational wear
• Flexible Installation– Suitable for horizontal or vertical mounting (upward flow)
• Easy Maintenance– Bolted bonnet allows internal inspection

Technical Specifications

Operating Principle

The valve opens when medium pressure lifts the disc vertically. When flow stops or reverses, the disc closes rapidly under its own weight and reverse pressure, creating a reliable seal. The spring-assisted closure ensures positive shut-off regardless of installation orientation.

Structural Features

• Guide Sleeve– Precision-machined disc guide ensures vertical movement accuracy
• Self-Aligning– Automatic disc-to-seat alignment for reliable sealing
• Anti-Rotation– Prevents seal surface wear from disc rotation
• Reinforced Body– External ribs enhance pressure containment
• Maintenance-Friendly– Bolted construction allows tool-free maintenance

⚠ Critical Installation Notes

1. Arrow on valve body MUST match medium flow direction
2. Vertical installation requires upward flow only
3. Install slow-closing device downstream for high-pressure applications

Typical Applications

• Petrochemical– Refinery units, cracking systems, pipeline transportation
• Power Industry– Boiler feedwater, steam lines, condenser systems
• Industrial Boilers– Feed pump discharge, steam header connections
• Metallurgy– Blast furnace cooling, hot blast stove piping
• Long-Distance Pipelines– Crude/product oil transmission stations

Selection Guide

Installation & Maintenance

Installation Requirements

• Flush pipeline thoroughly before installation to remove debris
• Ensure valve arrow aligns with medium flow direction
• Maintain vertical disc axis in horizontal installation
• Upward flow mandatory for vertical installation
• Install isolation valves at both ends for maintenance

Maintenance Schedule

• Monthly seal performance inspection
• Quarterly disc movement check
• Annual seal surface wear examination
• Regular lubrication of stem guide
• Periodic manual operation during long shutdowns