Wafer Check Valve

Wafer check valves utilize a swinging disc to manage flow, allowing or blocking it as needed. Their unique design makes them an ideal choice for very tight spaces where traditional flanged check valves cannot be used. These valves feature molded bodies around the disc opening area, which is a key distinction between wafer check valves and other types.

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Initially, this might seem like a mere space-saving measure, but having a valve body as opposed to a simple wafer check significantly impacts functionality. Flanged check valves, once placed, leave limited room for the disc to open within the pipeline, which can restrict flow.

Conversely, wafer check valves with their molded bodies allow the disc to swing open fully, ensuring maximum flow. This feature is crucial for applications that require full flow capacity. Therefore, wafer check valves are typically recommended where flow restriction is not a concern, while swing check valves are preferred when a full port valve is necessary.

A check valve is a versatile piece of equipment utilized across a range of sectors, from home use to industrial applications. This article explores the various types of industrial check valves, their benefits, and operational mechanisms. First, let's get a basic understanding of what a check valve is.

What Is A Check Valve?

A check valve is an automatic shut-off valve designed to permit the flow of fluids and gases in a single direction only. These valves operate based on pressure and flow conditions, opening to allow free flow and closing when the pressure drops or the pump stops.

Fluids or gases enter through the inlet, flow through the valve, and exit via the outlet. This continues uninterrupted until there's a drop in pressure or the pump is turned off. Notably, check valves operate independently without requiring external assistance, ensuring continuity even if there's a loss of air, electricity, or manpower at a facility.

PVC check valves are especially popular across various industries and are ideal for water pump systems.

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Mechanism Of Check Valve

Industrial check valves are activated by the flowing material. When the material flows in the right direction, the pressure opens the valve automatically. If the flow reverses, the valve closes without manual intervention. During forward flow, the internal disc opens the valve, and as the flow decreases or reverses, the disc starts closing the valve.

Parts Of Check Valve

• Cover
• Body
• Flange
• Hinge Pin
• Seat
• Disk
• Hinge Arm

Types Of Check Valve

Application Of Check Valve

Check valves find applications in various settings, ranging from household systems to industrial operations. Here are some sectors and systems where check valves are commonly used:

• Pumping Systems
• Pipeline Networks
• To Control Fluids
• To Control Gaseous Flow
• Pharmaceutical Factories
• Aircraft Hydraulic Systems
• Irrigation Systems
• Fuel Pump
• Water Supply Check Valves
• Heating Boilers

Advantages Of Using Check Valves

Regardless of the type of check valve installed, the primary benefits include:

• Low-Pressure Change
• Quick Opening
• Works Automatically
• Prevents Back Flow
• Do Not Require Power To Operate
• Maintains Pressure
• Low Maintenance Costs
• Serve As a Backup System
• Ideal For High And Low Pressure
• Reliable And Long Service Life
• Used For Both Horizontal And Vertical Flow
• Protect Pumps And Compressors From Damage Caused By Back Flow
• Reduce Downtime And Loss Of Production
• Prevent Water Hammer
• Reduce Sudden Valve Failure

Materials Used For Different Types Of Check Valve

Different setups and uses necessitate different types of check valves, which are available in various dimensions and materials. Whether it's a PVC Check Valve, Dual Plate Check Valve, Swing Check Valve, Wafer Type Check Valve, Ball Check Valve, or Lift Check Valve, each type is designed with specific dimensions and materials. The cost of these valves varies based on these factors.

Check valves are commonly manufactured from materials like PVC, stainless steel, cast iron, cast steel, bronze, and brass. The price of an industrial check valve depends on its type, material, and dimensions.

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