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WCB/SS Single Disc Check Valve EPDM/NBR Triple Rubber Seals

0102030405

China Single Disc Check Valve Supplier - EPDM/NBR Rubber Thin Plate - Factory Direct for Reliable Backflow Prevention

This high-quality single disc check valve, available from trusted China suppliers and factories, is designed for versatile operational needs. Choose between durable cast iron, known for its cost-effectiveness, or stainless steel, which offers excellent anti-corrosive properties. The valve features advanced EPDM/NBR seals, with EPDM tolerating temperatures from -10°C to 120°C while resisting weather exposure, and NBR designed to withstand oils and hydrocarbons. The efficient single-disc design guarantees a smooth flow with minimal pressure loss, and the inline mounting process ensures easy installation. Perfect for applications in water supply, HVAC systems, and light industrial pipelines, this check valve complies with EN 593 standards, ensuring reliable backflow prevention and low-maintenance operation.

Product Details

Product Specification

Product Name	Check Valve	Material	Carbon Steel / Stainless Steel
Type	Single disc	Medium	Water/Sea water
Size	DN50-DN1200	Seal	EPDM/NBR rubber
Power	Automatic	Standard	DIN/ANSI/GOST/JIS/BS

Product Description

Single-disc check valves feature a streamlined structure centered on a single hinged valve disc, a design that sets them apart with minimal flow resistance. Unlike multi-disc counterparts, their one-piece disc reduces internal turbulence, enabling smoother fluid passage even in low-pressure pipelines. The disc is typically connected to a precision hinge, ensuring rapid response—closing instantly once reverse flow is detected to prevent media backtracking.

Material Selection

Material selection for these valves is tailored to functional needs. For residential water systems, engineered plastic single-disc valves offer cost-effectiveness and corrosion resistance against tap water impurities. In light industrial settings, cast steel variants provide enhanced durability to withstand moderate pressure fluctuations. Some specialized models use food-grade stainless steel for beverage or pharmaceutical production, meeting hygiene standards while retaining the core single-disc advantage.

Installation and Maintenance

Installation and usage are straightforward due to their compact design. They fit seamlessly in narrow spaces where multi-part valves are impractical, such as under-sink pipelines or small pump outlets. The key installation requirement is aligning the disc’s hinge direction with forward flow—no complex adjustments are needed. Their simple structure also means less maintenance: occasional cleaning of the disc surface and hinge area is sufficient to maintain performance, eliminating the need for frequent part replacements.

Wide Applications

Their applications span daily and light industrial scenarios. They are essential in household water heaters to prevent cold water backflow into hot water lines, ensuring consistent temperature. In small-scale irrigation systems, they protect mini pumps from damage caused by water hammer, while their low flow resistance helps maintain efficient water distribution. They also find use in aquarium filtration setups, where the single disc’s gentle operation avoids disturbing aquatic life.

Frequently Asked Questions (FAQ)

1. How does a single-disc check valve prevent backflow?

A single-disc check valve uses a streamlined one-piece disc connected to a precision hinge. The valve opens automatically with forward media flow and closes instantly when reverse flow is detected, preventing backtracking and internal turbulence.

2. What materials are used to manufacture these check valves?

Depending on working conditions, they are available in Carbon Steel, Cast Steel, Stainless Steel (including food-grade variants), and engineered plastics, with sealing elements made of EPDM or NBR rubber.

3. What sizes and manufacturing standards are available?

These check valves cover a size range from DN50 to DN1200 and comply with international manufacturing standards including DIN, ANSI, GOST, JIS, and BS.

4. What is the key requirement during installation?

Thanks to their compact design, they fit easily into narrow spaces. The primary requirement during installation is simply ensuring the hinge direction of the single disc aligns with the forward fluid flow.

5. Where are single-disc check valves commonly applied?

They are widely used in water and sea water systems, household water heaters, light industrial processing, agricultural mini-pump irrigation to prevent water hammer, and aquarium filtration systems.

6. How much maintenance does this valve require?

Due to their simple single-piece structure, single-disc check valves require minimal maintenance. Occasional cleaning of the disc surface and hinge area is sufficient to ensure long-term reliable operation without frequent replacement of parts.