H44H ASME Swing Check Valve

Product Overview

H44H ASME swing check valve is designed to prevent reverse flow in industrial pipeline systems. WDL Valve supplies this valve in ASME Class 150, 300, 600 and 900 pressure ratings, with optional higher-pressure configurations according to project requirements.

The valve is manufactured according to ASME B16.34 and related API inspection requirements. The disc adopts a swing-type structure with a straight-through flow passage, allowing installation in horizontal pipelines and suitable vertical pipeline arrangements. The internal rocker pin structure helps reduce potential external leakage points.

For standard pressure classes, the body and cover are bolted. For high-pressure designs above Class 600, the middle flange can be supplied with a pressure self-sealing structure to reduce body weight and improve sealing reliability under pressure.

Key Product Features

• Swing disc design for automatic non-return service.
• Straight-through flow passage helps reduce pressure loss.
• Suitable for horizontal installation and selected vertical pipeline service.
• Internal rocker pin structure helps reduce external leakage risk.
• Bolted cover structure for standard pressure classes.
• Pressure self-sealing cover design available for high-pressure service.
• Carbon steel, stainless steel, Monel and hard-faced sealing options are available.

Technical Specifications

Applicable Standards

Pressure Test Data

Main Materials

Class 150 Dimensions

Class 300 Dimensions

Class 400 Dimensions

Class 600 Dimensions

Class 900 Dimensions

Class 1500 Dimensions

Typical Applications

• Water, steam, oil and gas pipeline systems
• Petrochemical and chemical process units
• Power plant auxiliary pipeline systems
• High-pressure industrial pipelines
• Backflow prevention service in ASME piping systems

Ordering Information

When requesting a quotation, please provide the valve size, pressure class, body material, sealing material, medium, working temperature, flange standard, installation direction and any special inspection requirements.

Dimensions, materials, sealing structure and pressure-temperature limits are subject to the final WDL Valve technical drawing and approved project datasheet.