Double Flap Wafer Check Valve

The butt-clamp check valve is suitable for water, steam, oil, gas and weak corrosive media, widely used in petroleum, chemical, electric power, HVAC and other systems. The valve has a compact structure and is suitable for horizontal or vertical installation, especially for pipelines with restricted space. The working temperature range is generally -29℃ to +425℃, depending on the selected material. The main function is to prevent backflow of media, relying on the fluid's own pressure to open and close automatically, without external drive. Commonly used materials include carbon steel, stainless steel, alloy steel, sealing surface can be selected rubber, PTFE or hard alloy, to adapt to a variety of complex working conditions.

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products

Double Flap Wafer Check Valve

Model: H76X.H76H,H76W

Subtitle：Compact Double Flap Check Valve

The Double Flap Wafer Check Valve is a compact, high performance check valve designed to prevent backflow in piping systems where space, weight and efficiency are critical. Featuring a double flap design that ensures a quick seal with minimal pressure drop, this valve is ideal for water, steam, oil and gas applications.

Classification:Clamping check valves

Working conditions:drugs manufacturing factory, chemical plant, waterwork, petrochemical industry

Product Overview	The Double Flap Wafer Check Valve is a compact, high performance check valve designed to prevent backflow in piping systems where space, weight and efficiency are critical. Featuring a double flap design that ensures a quick seal with minimal pressure drop, this valve is ideal for water, steam, oil and gas applications. The valve is made of carbon steel, stainless steel or ductile iron for durability and corrosion resistance. Its clamp-on design makes it easy to install between flanges, reducing overall system weight and space requirements. The double flap mechanism provides a reliable seal and reduces the water hammer effect, making it the preferred choice for high flow systems.

Product Characteristics	Dual Flap Design: Two spring-assisted flaps ensure quick sealing against reverse flow and minimize the effects of water strike. Low cracking pressure (as low as 0.1 psi) ensures efficient operation. Counter-clamp design: compact and lightweight, ideal for space-constrained installations. Mounts between flanges without additional bolts or washers. Low drag design: Optimized flow path minimizes pressure drop and ensures energy efficiency. Ideal for high-flow systems such as water supply and HVAC networks. Durable construction: Valve body material: carbon steel (ASTM A216 WCB), stainless steel (ASTM A351 CF8M), or ductile iron (EN-GJS-400-18). Flap and spring: stainless steel for corrosion resistance and long service life. Compliance: Meets API 594, ASME B16.34 and ISO 17292 standards for general industrial applications.

Product Advantages	Quick Seal: Dual flap design ensures immediate closure in the event of reverse flow. Energy saving: low pressure drop reduces pump energy consumption. Compact and lightweight: saves space and simplifies installation. Low Maintenance: Self-cleaning design reduces wear and tear for longer life.

Why choose our Double Flap Globe Check Valves?	Superior performance: trusted for high-flow water supply, HVAC and industrial systems. Cost-effective: affordable solution with low installation and maintenance costs. Global Compliance: Meets API, ASME and ISO international program standards. Versatility: Suitable for a wide range of media and installation orientations.

Medium of use

Water/hot water, oils

working condition

drugs manufacturing factory, chemical plant, waterwork, petrochemical industry, paper mills, food factory

summarize

The Double Flap Wafer Check Valve is a reliable, high-performance solution for preventing backflow in water, steam, oil and gas systems. Its double flap design, compact, butt-mounted construction, and industry-standard features make it ideal for high-flow and space-constrained applications. Whether you're managing municipal water supplies, designing HVAC systems or supplying industrial equipment, this valve delivers consistent performance with minimal maintenance.

Product Parameters

Nominal diameter	2" to 24" (DN50 to DN600)
Nominal pressure	Class 150 to Class 600 (ASME B16.34)
temperature range	-29°C to 200°C (-20°F to 392°F)
Applicable medium	Water, oil, etc.
Valve Material	WCB, ductile iron, stainless steel material
Valve material	WCB, ductile iron, stainless steel material
tappet	2Cr13,304