4 Inch Swing Check Valve
Product Introduction

4 Inch Swing Check Valve are a critical safety component in fixed firefighting systems. As per industry norms, they are painted safety red for immediate identification. Engineered for exceptional pressure and temperature resistance, they guarantee uninterrupted forward water flow to suppression networks while preventing dangerous backflow. Their spring-assisted closure is both swift and quiet, minimizing pressure surge. The grooved connections ensure a robust seal and facilitate rapid installation or maintenance, which is vital for emergency system integrity.
Product Parameter
Product Name:4 Inch Swing Check Valve
Main Material:Ductile Iron
Body Type:Grooved
Size Range:DN50,DN65,DN80,DN100,DN125.DN150,DN200,DH250,DN300
Working Pressure:PN10/PN16/PN20/PN25
Working Temperature:0℃ to 80℃(32℉ to 176℉)
Media:Water
Surface Finishing:Epoxy Coating
Purpose:Used in one-way flow pipeline to prevent the water from back flow
Application: High-rising building fire fighting system, near fire pump
Product Material
|
Part |
Material |
|
Body |
Ductile Iron |
|
Disc |
Ductile Iron,Covered By EPDM |
|
Stopper |
EPDM |
|
Clapper Arm |
Ductile Iron |
|
Hinge Pin |
Stainless steel 304 |
|
O-Ring |
EPDM |
|
Plug |
Stainless steel 304 |
Product Features
Engineered for dual use in supply and drainage systems.
Hassle-free actuation with minimal operational torque required.
Versatile installation is enabled in any orientation with upward flow.
Features a spring-loaded disc to absorb shock and prevent water hammer.
Excellent seal integrity and silent shut-off characteristics.
Its anti-fatigue construction enhances durability and extends service life.
FAQ
Q1: Why is the compact and lightweight nature of this valve a significant benefit?
It simplifies handling, reduces shipping costs, and minimizes the structural support needed for the piping system. This is a major advantage in crowded pipe racks or suspended installations in buildings. It also contributes to lower overall project costs without sacrificing the valve's performance or pressure rating.
Q2: What maintenance is typically required for these valves?
They are designed for minimal maintenance. The primary task is periodic inspection to ensure internal components haven't worn or fouled. A key advantage of the grooved design is that maintenance, if ever needed, is simplified. The coupling can be disassembled without moving the adjacent pipe sections, allowing for easy access to internal parts.
Q3: What are the main design and performance differences between grooved and flanged swing check valves?
The core difference is the end connection method, driving all other contrasts. Grooved valves are lighter, faster to install, and more economical for lower-pressure applications. Flanged valves are bulkier, require bolting, and are typically rated for higher pressure classes. Grooved offers flexibility; flanged offers ultimate strength for the most demanding services.
Q4:Why is ductile iron a preferred material for the valve body?
Ductile iron provides an exceptional balance of strength, durability, and impact resistance (toughness) at a competitive cost. It offers superior tensile strength and yield strength compared to gray cast iron, making it highly resistant to shock loads and pressure surges common in water systems, which is essential for long-term reliability.
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