Single Disc Check Valve

The Single Disc Check Valve launched by Zhongguan Valve is an extremely useful industrial valve. Its main function is to allow liquids or gases to flow in only one direction, preventing backflow.

This valve is ingeniously designed, reacts very quickly, and is easy to install, taking up little space. It can effectively control the flow direction for water, oil, or gas. It can be used in water treatment plants, power stations, chemical plants, heating and air conditioning systems, etc. This valve is particularly sturdy and can withstand high pressure and high temperatures. It won't break even after being used for a long time and is a very reliable choice in industrial pipeline systems.

Technical Advantages: Why Choose Our Single Disc Check Valve?

At Zhongguan Valve , we understand that reliability is non-negotiable in industrial settings. Our Single Disc Check Valve is not just a component; it is a safety guarantee for your entire pipeline system.

1. Ultra-Compact Wafer Design

The most distinctive feature of our Single Disc Check Valve is its small size and excellent anti-backflow performance. Unlike bulky, traditional check valves, we adopted an advanced wafer-type design . Like a sandwich, the valve is clamped directly between two pipe flanges. This saves significant space and reduces installation weight and costs -2 .

2. High-Grade Material 

We manufacture the standard Single Plate Check Valve using high-quality WCB carbon steel (cast steel). This material is extremely durable and allows the valve to withstand harsh environments, high pressure, and extreme temperatures. Need more? We offer custom casting with Stainless Steel (SS304, SS316) , Aluminum Bronze , and other alloys depending on the corrosivity of your media -1 .

3. Dynamic Sealing & Quick Response

The disc inside the Single Disc Check Valve has a very sensitive response. When liquid or gas flows forward, the disc opens instantly with minimal resistance (low pressure drop). The moment flow stops or reverses, the disc springs back (assisted by gravity or spring force) to form a tight seal, preventing destructive water hammer damage -2 .

Product Specifications & Data Sheet

Applications: Where Can You Use It?

This versatile valve is used across many industrial settings. We have successfully supplied our Single Disc Check Valves to the following sectors:

• Water Treatment Plants: Used in water supply systems to prevent backflow contamination -2.
• HVAC & Building Automation: Installed in heating and air conditioning systems to maintain thermal efficiency.
• Power Plants: Essential in cooling systems to ensure cooling water does not flow back, protecting generator equipment -2.
• Petrochemical: Securely handles the transport of oil and gas in pipelines.

Case Study: Pump Protection

A pumping station in Southeast Asia was experiencing repeated pump seizures due to backflow surges. Previously, they used slow heavy swing check valves. We replaced their system with our Single Disc Check Valve . The quick-closing feature eliminated the water hammer, and the lightweight design made installation in their crowded pump room effortless. Result: Zero pump failures in the last 18 months.

How a Single Disc Check Valve Works

The mechanism is simple but highly effective:

1. Forward Flow: The pressure of the medium (Water/Oil/Gas) pushes the disc off the seat. The hinge rotates slightly, allowing full flow.
2. Reverse Flow: When the upstream pressure drops or reverses, the backflow pushes the disc back against the seat.
3. Sealing: The disc closes instantly, creating a tight seal and stopping reverse flow completely -2.

Three Strict Factory Tests

Our factory uses a quality control system that rivals international standards. Every valve we produce must undergo three strict "examinations" before leaving the factory:

1. The Backflow Prevention Test: We ensure that the moment flow stops, the disc seats perfectly, leaving a 0% leak rate.
2. High-Pressure Shell Test: We use higher pressure than the actual working pressure to test the casting. This ensures the body will not crack or sweat.
3. Overall Performance Simulation: We simulate real-world pipeline conditions to ensure the disc opens smoothly and closes tightly without sticking.

Zhongguan Valve has obtained TS Special Equipment Manufacturing License, ISO9001, ISO14001, and OHSAS18001 -1. Only valves that pass these three stages are released.

Installation Flexibility

We know that every pipeline is different. Our Single Disc Check Valve adapts to you.

• Horizontal Pipes: Standard installation.
• Vertical Pipes: The valve works perfectly in vertical upward flow applications. The disc closes effectively by gravity or backflow weight when the pump stops -2.

Customization & Supply Chain Advantages

Zhongguan Valve is the integration of the Northern valve supply chain (Cast Iron) and the Southern industrial valve supply chain (Cast Steel/Stainless) -1 .

We offer "Tailored" services:

• Special Materials: Need to handle corrosive chemicals? We can switch to Stainless Steel 316 for the disc and body.
• Extended Stem: For underground buried installation.
• Actuator Ready: Integration with position limit switches for automated systems (upon request).

Our Commitment: We focus not only on our own production of butterfly valves but also on the integration of the whole valve supply chain to provide our customers with richer product lines and more thoughtful service.

FAQ About Single Disc Check Valves

Q1: What is the main difference between a Single Disc Check Valve and a Dual Disc Check Valve?
A1: Our Single Disc Check Valve (Swing type) generally provides a tighter seal against low-pressure backflow and is more durable against "slamming" in larger sizes (DN200+). The single plate design offers a larger flow area compared to some spring-loaded dual plates.

Q2: Can I install this valve vertically?
A2: Yes, it is recommended for vertical pipelines where the flow direction is bottom to top . However, it is crucial to check the flow arrow marked on the valve body. For top-to-bottom vertical drops, a spring-loaded type may be preferred.

Q3: How do I choose the right pressure rating?
A3: We offer ratings from PN10 to PN40. Our engineers usually advise selecting a rating equal to or higher than your pipeline's maximum pressure. For high-pressure steam or oil, WCB material is the minimum standard.

Q4: Is the product strictly compliant with international standards?
A4: Yes. While our base design is excellent, we can manufacture our Single Disc Check Valve to comply with GB, ANSI, JIS, DIN, or BS standards based on your flange drilling requirements -1 .

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Zhongguan Valve: Reliable Quality, Customized Solutions.

We have two production bases (Tianjin & Wenzhou) with over 19 years of experience. We guarantee fast delivery and high-quality products.