Impa 751425 Swing Check Valve F7372 5K 5K-125 JIS Cast Iron 125 mm 330 mm 235 mm 200 mm 8 19 mm

• Customization: Available
• Media: Water
• Temperature: Ordinary Temperature
• Model NO.: JIS F7372
• Material: Cast Iron
• Connection Form: Flange
• Structure: Swing
• Pressure: Ordinary Pressure
• Sealing Form: Gland Packings Globe Valve
• Standard: JIS
• Application: Marine Usage
• Delivery: Express or by Sea
• Price: Competitive
• Production: in Stock
• Capacity: 100000 Pieces/Year
• Transport Package: Plywood Box
• Specification: JIS F7372
• Trademark: Customized
• Origin: China
• HS Code: 8481804090
• Package Size: 38.00cm * 38.00cm * 38.00cm
• Package Gross Weight: 10.000kg

Product Description

 

Product Description

We support OEM and the producing capacity is big,  fast shipment, professional design team for you, welcome to contact us!   
 

Marine Check Valve - Definition & Function

A marine check valve (or non-return valve) is a specialized one-way valve designed for shipboard piping systems to prevent backflow of liquids or gases (e.g., seawater, fuel, oil, or compressed air). It ensures fluid flows only in the intended direction, automatically closing when flow reverses-critical for safety and system integrity in marine environment.

Key Features of Marine Check Valves

Automatic Operation
Opens when forward pressure exceeds the cracking pressure.
Closes instantly if backflow or pressure loss occurs (e.g., pump failure).
Robust Marine-Grade Materials
Bronze, stainless steel, or duplex alloys for corrosion resistance in seawater.
Reinforced elastomers for sealing in oily or chemical-laden fluids.
Types Used on Ships
Swing Check Valve: Hinged disc swings open/closed (common in large pipes).
Lift Check Valve: Disc moves vertically (high-pressure systems).
Ball Check Valve: Uses a floating ball (compact, for viscous fluids).
Dual-Plate Check Valve: Spring-loaded plates for rapid closure (reduces water hammer).
Critical Marine Applications
Bilge & Ballast Systems: Prevents flooding back into pumps.
Fuel/Oil Transfer Lines: Stops contamination from reverse flow.
Cooling Water Circuits: Protects engines/heat exchangers.
Firefighting Systems: Maintains pressurized water supply.

Why Ships Rely on Check Valves

• Safety: Avoids backflow-induced equipment damage (e.g., flooded bilges, pump cavitation).
• Maintenance Reduction: No manual intervention needed-works passively.
• Compliance: Meets IMO (International Maritime Organization) and class society (e.g., ABS, DNV) standards.

Check Valve vs. Other Marine Valves

Valve Type	Primary Function	Marine Use Case
Check Valve	Block reverse flow	Bilge pumps, fuel lines
Globe Valve	Throttle/adjust flow	Cooling water control
Gate Valve	Fully open/close flow	Main seawater intake
Ball Valve	Quick on/off operation	Fuel tank isolation

Need help selecting a check valve for a specific ship system? Ask away!

JIS F7372 specifies the technical requirements for cast iron swing check valves used in marine applications, typically rated for 5K pressure. These valves are designed to prevent backflow and are commonly used for water, oil, and steam. 
Here's a more detailed breakdown:
Standard: JIS F7372 specifies the requirements for cast iron swing check valves. 
Pressure Rating: The valves are typically rated for 5K pressure, which is a Japanese pressure standard. 
Material: The body is typically cast iron, while the disc and seat can be bronze or stainless steel. 
Type: They are swing check valves, also known as flapper check valves. 
Application: These valves are commonly used in marine applications, but they can also be used in other industrial applications. 
Sizes: JIS F7372 valves are available in various sizes, typically from DN15 to DN300 (equivalent to 1/2" to 12" nominal bore). 
Media: They are suitable for water, oil, and steam. 
Design: JIS F7372 valves have a swing type disc that opens and closes with the flow, allowing fluid to pass in one direction. 
Flange Standards: The flanges on these valves conform to JIS B2210, which is the Japanese standard for flanges. 
Testing: The valves are tested according to JIS F7400. 
In essence, JIS F7372 provides a standard for the design, materials, and testing of cast iron swing check valves used in marine applications, ensuring consistent quality and performance. 

Company

  Qingdao Hongfeng Xianglong Valve Manufacturing Co., Ltd. is a professional marine valve manufacturing enterprise located in Mingcun Town, Pingdu City, Qingdao, China. We mainly produce marine valves and accessories like gate valve, globe valve, stop valve,check valve, stop-check valve, butterfly valve, ball valve, storm valve with Japanese, German, and national standards. Providing customers with high-quality and efficient products and services is our business philosophy, which we have always followed and continuously developed over the years.
  The company's predecessor has been deeply involved in railway parts for 16 years, with rich processing technology and advanced processing equipment. It has an experienced professional team that can carry out specialized production from product design, mold development, product casting, processing, assembly, and testing. High quality products have won us the trust of customers, and good service has established a long-term cooperative relationship.
  The company's factory has complete production and equipment, with an 8000 square meter production workshop and around 60 employees. It has a complete management team and management process, equipped with processing workshops, assembly workshops, pressure testing workshops, painting workshops, and complete valve production equipment such as lathes, milling machines, CNC machines, drilling machines, valve sealing test benches, and painting assembly lines. While ensuring internal quality, it provides customers with the shortest delivery time.

 

Workshop

Packaging & Shipping

FAQ

Q: Are you trading company or manufacturer ?
A: We are manufacturer in PingDu city, Qingdao city, China.
Q: What's your product range?
A: We produce marine valves, like gate valve, check valve, stop valve, stop-check valve, globe valve, ball valve, butterfly valve and accessories .
Q: What's Execution Standard?
A:JIS/GB/DIN/BS etc.
Q: What's your Strong product ?
A: Gate valve.
Q: How long is your delivery time?
A: Normally it is 3 days if the goods are in stock. or it is 35 days if the goods are not in stock, it is based on the quantity.
Q: Do you provide samples ?
A: Yes, we could offer the sample. 
Q: What is your terms of payment ?
A: 30% deposit in advance and balance before shipment.
Q: What's the packing?
A: Plywood packing.
Q: Can I have my own logo on the products?
A: Yes, you can send us the drawing and we can make it.
Q: Can you produce the products based on my own drawing?
A: Yes.
Q: Which price terms can be accepted?
A: FOB,CIF etc.

Our Advantages

(1)Own production line and workshop to do all processes so can save cost and offer you competitive price.
(2)Own workshop to control schedule more flexibly.
(3)We can assure quality in every process in production line.
(4)Class Approval Certifications.
(5)Quality guarantee after sale.