Copper Check Valve - AILAN Tech

Product Overview

AILAN Tech's Copper Check Valves are precision-engineered to provide reliable backflow prevention in various plumbing applications. Constructed from high-quality copper alloys, these valves offer excellent corrosion resistance and durability, making them ideal for use with water, oil, and other non-corrosive fluids.

Our copper check valves feature a spring-loaded disc design that ensures tight shut-off when flow reverses direction. The streamlined internal construction minimizes pressure drop and maximizes flow capacity, while the robust copper alloy body ensures long service life even in demanding environments.

Available in a range of sizes from DN15 to DN100, with both threaded and solder connections, our copper check valves meet the highest industry standards and are suitable for use in residential, commercial, and light industrial applications.

Key Features & Benefits

Corrosion Resistance

High-quality copper alloy construction provides excellent resistance to corrosion, ensuring long service life in various environments.

Backflow Prevention

Spring-loaded disc design ensures reliable shut-off when flow reverses, preventing contamination and system damage.

Low Pressure Drop

Streamlined internal construction minimizes pressure loss, maximizing flow capacity and system efficiency.

Leak-Free Performance

Precision-machined components and high-quality seals ensure tight shut-off and reliable performance over time.

Self-Actuating Design

Operates automatically based on flow direction, requiring no external power or manual operation.

Easy Installation

Available with threaded or solder connections for quick and easy installation in new or existing plumbing systems.

Technical Specifications

Basic Parameters

Parameter	Specification Range
Nominal Diameter (DN)	DN15 ~ DN100
Pressure Rating	PN10, PN16, PN25
Operating Temperature	-10°C ~ 120°C
Applicable Media	Water, Oil, Gas, Non-corrosive fluids
End Connection	Threaded (NPT, BSP), Solder

Material Specifications

Component	Material Options	Standards/Features
Body & Cap	Brass (C37700), Bronze (C83600), Copper Alloy	High strength, corrosion resistance
Disc	Brass, Bronze, Stainless Steel	Precision-machined, wear resistance
Spring	Stainless Steel (304/316)	Corrosion resistance, consistent performance
Seat	PTFE, NBR, EPDM	Excellent sealing performance
Internal Components	Brass, Stainless Steel	Corrosion resistance, smooth operation

Standards & Compliance

Design Standards: EN 1074-1, AWWA C508, MSS SP-80
Testing Standards: EN 12266-1, API 598
Certifications: CE, WRAS, ACS, NSF/ANSI 61

Working Principle

Copper check valves operate on a simple yet effective principle to prevent backflow and ensure unidirectional flow in plumbing systems:

Forward Flow: When fluid flows in the intended direction, the pressure pushes against the disc, compressing the spring and allowing the valve to open. The streamlined design minimizes pressure drop and allows for efficient flow.
Backflow Prevention: When flow reverses direction, the spring pushes the disc against the seat, creating a tight seal that prevents backflow. This automatic response ensures immediate shut-off when flow conditions change.
Sealing Mechanism: The disc is precision-machined to fit perfectly against the seat, creating a tight seal that prevents leakage. The seat material (typically PTFE or rubber) provides excellent sealing performance even under varying pressure conditions.
Pressure Management: The spring tension is carefully calibrated to ensure the valve opens at the minimum required pressure (cracking pressure) while providing reliable shut-off when flow reverses. This balance ensures efficient operation across a wide range of flow rates.

Application Areas

Residential Plumbing

Ideal for use in homes, apartments, and condominiums for water supply systems, including main lines, branch lines, and fixture connections.

Commercial Buildings

Suitable for office buildings, hotels, shopping centers, and other commercial structures for water supply, HVAC systems, and fire protection systems.

Institutional Facilities

Used in hospitals, schools, universities, and government buildings for reliable water flow control in various systems and applications.

Light Industrial

Suitable for light industrial applications such as food processing, pharmaceuticals, and electronics manufacturing where clean water and reliable flow control are essential.

Hospitality Industry

Ideal for hotels, resorts, and restaurants for water supply systems, including guest rooms, kitchens, laundry facilities, and swimming pools.

Plumbing Renovations

Perfect for renovation projects where existing plumbing systems need to be upgraded or modified with reliable, high-quality components.

Installation & Maintenance

Installation Guidelines

Ensure the valve is compatible with the system's pressure and temperature requirements.
Install the valve in the correct orientation, with the flow direction matching the arrow on the valve body.
For threaded valves, use Teflon tape or pipe dope on the male threads to ensure a leak-free connection.
For solder valves, follow proper soldering techniques, ensuring the valve is open during soldering to prevent damage to internal components.
Ensure adequate straight pipe runs upstream and downstream of the valve (typically 5-10 pipe diameters) to ensure proper operation.
Test the valve after installation to ensure proper operation and check for leaks.

Maintenance Recommendations

Inspect the valve periodically for signs of leakage, corrosion, or damage.
Clean the valve exterior regularly to remove dirt and debris that could affect operation.
Check for any unusual noises or vibrations during operation, which could indicate a problem.
Replace the valve if it shows signs of significant wear, corrosion, or damage that cannot be repaired.
Keep records of maintenance activities for future reference.
For systems with potentially contaminated media, consider installing a strainer upstream of the valve to protect it from debris.

Frequently Asked Questions (FAQ)

Q: What is the maximum pressure rating for copper check valves?

A: Our copper check valves are available with pressure ratings up to PN25 (25 bar), making them suitable for most residential, commercial, and light industrial applications.

Q: Can copper check valves be used with hot water systems?

A: Yes, our copper check valves are designed to handle temperatures up to 120°C, making them suitable for both hot and cold water systems.

Q: What is the difference between threaded and solder connections?

A: Threaded connections use screw threads for installation, while solder connections require heating and melting solder to create a permanent bond. Threaded valves are easier to install and remove, while solder valves provide a more permanent, leak-proof connection.

Q: How long do copper check valves typically last?

A: With proper installation and maintenance, copper check valves can last 20-50 years or more, depending on the operating conditions and water quality.

Q: Are copper check valves suitable for potable water systems?

A: Yes, our copper check valves are certified to meet NSF/ANSI 61 standards for use in potable water systems, ensuring they are safe for drinking water applications.

Q: What is the cracking pressure of a copper check valve?

A: The cracking pressure (minimum pressure required to open the valve) typically ranges from 0.03 to 0.1 bar, depending on the valve size and design. This low cracking pressure ensures efficient operation even at low flow rates.

Need Custom Solutions?

Our engineering team can customize Copper Check Valves to meet your specific pressure, temperature, and media requirements. Contact us today for a personalized quote.

Contact Our Technical Team