Product Overview

The H46H Dual Plate Check Valve features a dual-disc structure with quick closing, water hammer protection, and low pressure drop characteristics. Specifically designed to prevent medium backflow, it is widely used in petroleum, chemical, power, water supply and drainage applications.

Core Advantages

• Quick Closing Design– Dual-disc structure achieves 0.5-1 second closing time, effectively preventing water hammer
• Low Flow Resistance– Streamlined body reduces pressure drop by over 40%
• Compact Structure– Length is only 1/3 of conventional check valves, saving installation space
• Zero Leakage Seal– Stainless steel discs + rubber sealing rings ensure bidirectional zero leakage
• Maintenance-Free Design– No external moving parts, long service life
• Multiple Material Options– Body available in cast iron, carbon steel, stainless steel, etc.
• Horizontal/Vertical Installation– No installation position limitations, adaptable to various conditions

Technical Parameters

Working Principle

The H46H Dual Plate Check Valve adopts a dual-disc swing structure. When medium flows forward, fluid pressure pushes two semi-circular discs to rotate open around the shaft; when medium stops or reverses, the discs close quickly under their own weight and reverse medium pressure to prevent backflow. The spring-assisted design ensures reliable closing in any installation position.

Structural Features

• Dual-Disc Structure– Two semi-circular discs arranged symmetrically for fast, smooth closing
• Low Flow Resistance Body– Streamlined design minimizes pressure loss
• Wear-Resistant Bushings– Self-lubricating bearings ensure smooth disc rotation
• Corrosion-Resistant Design– Body interior can be rubber-lined or epoxy-coated
• Easy Maintenance– Inspection port facilitates internal examination and maintenance

Typical Applications

• Water Supply & Drainage Systems: Pump outlets, water plant pipelines
• Petrochemical Industry: Crude oil, refined oil transmission pipelines
• Power Industry: Boiler feedwater systems, cooling water systems
• HVAC Systems: Chilled water, cooling water circulation systems
• Industrial Systems: Compressed air systems, process pipelines

Installation & Maintenance

Professional Installation Guide

• Confirm valve flow direction marking before installation to ensure correct orientation
• Maintain straight pipe sections of 5×pipe diameter before and after the valve
• For horizontal installation, ensure the disc shaft is level
• For vertical installation, medium must flow upward

Scientific Maintenance Plan

• Quarterly Inspection: Check disc opening/closing flexibility
• Annual Maintenance: Inspect sealing surface wear
• Long-Term Shutdown: Keep valve fully open
• Troubleshooting: If leakage occurs, check discs and sealing surfaces

Selection Guide

1. Determine pipeline nominal diameter (DN or inches)
2. Select pressure rating (PN or Class)
3. Choose material based on medium characteristics
4. Determine connection type (flange standard)
5. Specify any special requirements (e.g., lining, insulation)

Important Notes

• Do not install in reverse flow direction
• For vertical installation, only upward flow configuration is permitted
• For systems prone to water hammer, consider adding damping devices