Rubber flap check valve

Swing check valve is suitable for water, steam, oil, gas and weak corrosive media, widely used in petroleum, chemical, electric power, metallurgy and other industries in low and medium pressure piping system. The valve uses the valve flap to rotate around the axis of opening and closing, low resistance, suitable for large flow, low-frequency opening and closing conditions. The working temperature range is generally -29℃ to +550℃, depending on the material. The main function is to prevent backflow of media and protect equipment safety. Commonly used materials include carbon steel, stainless steel, alloy steel, sealing surface can be stainless steel or carbide, with good sealing and durability.

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products

Rubber flap check valve

Model: H44X

Subtitle：Soft seal swing check valve

The Rubber Flap Check Valve is a highly efficient check valve designed for water, wastewater and slurry applications. Featuring a flexible rubber flap that ensures a reliable seal and minimizes pressure drop, this valve is ideal for systems where low resistance and debris resistance are critical.

Classification:Swing Check Valve, Water system check valves

Working conditions:construction work, waterwork, water treatment plant

Product Overview	The Rubber Flap Check Valve is a highly efficient check valve designed for water, wastewater and slurry applications. Featuring a flexible rubber flap that ensures a reliable seal and minimizes pressure drop, this valve is ideal for systems where low resistance and debris resistance are critical. Constructed of durable materials such as EPDM or NBR and cast iron or stainless steel, the valve resists corrosion and abrasion to ensure long-term performance in harsh environments. Its simple yet rugged design is easy to install and maintain, making it a cost-effective solution for municipal, industrial and irrigation systems.

Main characteristics	Flexible rubber flap: Made of EPDM or NBR to ensure a tight seal and abrasion resistance. Self-cleaning design prevents clogging with debris, sludge or fibrous material. Low resistance design: minimum pressure drop ensures efficient flow and reduces energy consumption. Ideal for low pressure systems such as water supply and drainage networks. Debris Resistance: The wide body design allows the valve to handle water with high solids content (e.g., sewage, industrial slurries). Corrosion resistance: Valve body material: ductile iron (epoxy coated) or stainless steel (ASTM A351 CF8M). Suitable for corrosive media such as seawater and water containing chemicals. Easy to install and maintain: compact and lightweight design simplifies installation in tight spaces. No external drive required; operates purely on hydrodynamics.

Product Advantages	Energy saving: low head loss (Kv value ≥ 0.8) reduces pump energy consumption. Resistance to debris: rubber baffles are designed to prevent clogging with sand, grit and fibrous material. Low maintenance: no lubrication required; can be inspected with removable cover. Cost-effective: Simple design reduces initial and life-cycle costs.

Medium of use

Water/hot water, Sewage/wastewater

working condition

construction work, waterwork, water treatment plant

summarize

Rubber flap check valves are a reliable and cost-effective solution for preventing backflow in water, wastewater and slurry systems. Its flexible rubber flap, low resistance design and debris-resistant construction make it ideal for municipal, industrial and irrigation applications. Whether you're managing a water treatment facility, designing a drainage system or supplying industrial equipment, this valve provides leak-free performance with minimal maintenance.

Product Parameters

Nominal diameter	DN50 to DN600 (2" to 24")
Nominal pressure	PN10/PN16 (EN 1092-1) or Class 150 (ASME B16.5)
Applicable temperature	-10°C to 80°C (EPDM) / -20°C to 60°C (NBR)
Valve Material	Ductile iron (EN-GJS-400-18), epoxy coated or stainless steel (CF8M)
sealing material	Flap covered with EPDM or NBR rubber (meets FDA/EC1935 drinking water standards)
connection method	Flanges (EN 1092-1 or ASME B16.5)