DIN DN150 DN200 Pn16 Cast Iron Ductile Iron Ggg50 Gg25 Flange Swing Rubber Lining Check Valve NBR Plate Non Return Check Valve

• Customization: Available
• Media: Water
• Temperature: Ordinary Temperature
• Model NO.: H44X-10/16Q
• Type: Direct-acting
• Material: Cast Iron
• Connection Form: Flange
• Pressure: Ordinary Pressure
• Actuator: Manual
• Seal Surface: Brass
• Thread Position of Valve Rod: Non
• Usage: Regulation, Drain
• Standard: DIN
• Application: Industrial Usage, Water Industrial Usage
• Transport Package: Plywood
• Specification: DN32~DN800
• Trademark: non
• Origin: China
• HS Code: 8481300000
• Production Capacity: 50000PCS/Month

Product Description

Introduction

The cast iron rubber - plate check valve is a crucial device in fluid - handling systems, designed to allow fluid to flow in one direction only and prevent backflow.
Working Principle
When the fluid flows in the forward direction, the pressure of the fluid pushes the rubber plate open, allowing the fluid to flow through the valve. The shape and flexibility of the rubber plate enable it to open wide, minimizing flow resistance.
When the fluid attempts to flow backward, the pressure of the backflow causes the rubber plate to close against the valve seat. The rubber material provides a tight seal, effectively preventing the fluid from flowing in the reverse direction. The sealing force increases with the increase in backflow pressure, ensuring reliable prevention of backflow.
Advantages
Good Sealing Performance: The rubber - plate design provides excellent sealing, minimizing leakage even under low - pressure conditions. This is crucial for maintaining the integrity of the fluid - handling system and preventing contamination or loss of the fluid.
Low - Flow Resistance: When the valve is open, the rubber plate does not significantly obstruct the flow path, resulting in low - flow resistance. This helps to reduce energy consumption and pressure drop in the pipeline, improving the overall efficiency of the system.
Corrosion Resistance: The combination of a cast - iron valve body and a rubber plate makes the valve resistant to corrosion from many common fluids. The rubber plate protects the internal components of the valve from contact with the fluid, extending the service life of the valve.
Quiet Operation: The rubber plate moves smoothly during opening and closing, resulting in quiet operation. This is particularly beneficial in applications where noise levels need to be minimized, such as in buildings or sensitive industrial environments.

Specification

Features

Valve Body: It is made of high - quality cast iron, which provides excellent strength and durability. The cast - iron construction enables the valve to withstand high pressures and harsh working conditions commonly found in various industrial applications.

 Rubber Plate: The rubber plate is a key component of the valve. It is usually made of high - quality rubber materials such as natural rubber, EPDM, or NBR, depending on the characteristics of the fluid being handled. The rubber plate is attached to the inside of the valve body and acts as a sealing element. When the fluid flows in the normal direction, the rubber plate opens to allow the fluid to pass through. When backflow occurs, the rubber plate closes tightly against the valve seat, preventing the fluid from flowing backward.

Valve Seat: The valve seat is an integral part of the valve body. It is precisely machined to ensure a tight seal with the rubber plate. The valve seat is usually made of materials with good wear - resistance and corrosion - resistance, such as stainless steel or bronze - plated surfaces, to ensure long - term reliable operation. 

Hinge or Pivot Mechanism: The rubber plate is connected to the valve body through a hinge or pivot mechanism. This allows the rubber plate to move freely between the open and closed positions. The hinge or pivot is designed to be durable and resistant to wear, ensuring smooth operation of the valve over its service life.

Packing 

Loaded

Transportation

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

After Sales Service

Standard Warranty: 18 months after receipt of the goods.
Global Support: 24/7 technical assistance and spare parts supply.

Why Choose Us?

Other Products

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

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FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.