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Home > Industrial Equipment & Components > Valve > Check Valve > PN1.0-6.4MPa Cast Iron Marine Check Valve DN50-DN200 Flanged Type for Pump Safety

PN1.0-6.4MPa Cast Iron Marine Check Valve DN50-DN200 Flanged Type for Pump Safety

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PN1.0-6.4MPa Cast Iron Marine Check Valve DN50-DN200 Flanged Type for Pump Safety photo-5

Product Spotlights

Cast iron swing check valve with PN1.0-6.4MPa pressure range, DN50-DN200 flanged design for reliable backflow prevention in marine pump systems. ISO9001 certified, durable construction, and customizable flange standards. Backed by Shanghai Zhibang Valve's global export experience and fast port delivery.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Material:

Cast Iron

Application:

Other, Marine

Standard:

Other, ISO9001

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Material Cast Iron

Application Other, Marine

Standard Other, ISO9001

Media Other, Water, Oil, Gas

Pressure Rating PN1.0-6.4MPa

Size Range DN50-DN200

Connection Type Flanged

Valve Type Swing Check Valve

Temperature Range -10°C to 120°C (Standard)

Color Red/Blue (Customizable)

Shanghai Zhibang Valve Manufacture Co., Ltd. proudly introduces our PN1.0-6.4MPa Cast Iron Marine Check Valve (DN50-DN200, Flanged Type) – a robust solution engineered specifically for pump safety and marine applications. Since 2016, we have been dedicated to delivering high-quality valves with annual export value exceeding US$1 million, serving markets across North America, South America, Europe, Asia, and Oceania. Our cast iron check valves are manufactured under strict ISO9001 quality management systems, ensuring reliable performance in demanding environments. Whether for seawater cooling systems, bilge lines, or industrial pump discharge, this valve provides automatic backflow prevention with minimal pressure loss.

Key Features & Technical Specifications

Durable Cast Iron Body: High-grade cast iron (GG25 or equivalent) offers excellent corrosion resistance and mechanical strength for marine use.
Wide Pressure Range: Rated from PN1.0 to PN6.4 MPa (150# to 300#), suitable for various system pressures.
Flanged Connections: Standard flanges (DIN, ANSI, JIS available upon request) ensure easy installation and leak-tight sealing.
Compact Design: Short face-to-face dimensions reduce space requirements in piping systems.
Smooth Operation: The swing disc design with a hinge pin allows quick response to flow changes, minimizing water hammer.
Pump Safety: Prevents reverse rotation and protects pump impellers from damage caused by backflow.
Maintenance-Friendly: Top cover enables easy access to internal parts for inspection or replacement.
Wide Temperature Range: Designed for media temperatures from -10°C to 120°C, with optional high-temperature versions.

Technical Parameters (Typical Values)

Size (DN)	Pressure Rating	L (mm)	H (mm)	Weight (kg)
DN50	PN1.0-6.4	230	160	12
DN80	PN1.0-6.4	310	200	22
DN100	PN1.0-6.4	350	245	35
DN150	PN1.0-6.4	480	320	65
DN200	PN1.0-6.4	600	400	110

Note: Dimensions are for reference; exact values may vary by flange standard. Contact us for custom sizes.

Advantages for Buyers

Enhanced Pump Safety: Eliminates backflow, reducing risk of pump cavitation and mechanical damage.
Long Service Life: Cast iron body and stainless steel internals (hinge pin, disc) resist wear in harsh marine environments.
Versatile Applications: Suitable for fresh water, seawater, oil, and neutral gases – ideal for shipbuilding, offshore platforms, and industrial water systems.
Cost-Effective: Competitive pricing without compromising on quality, backed by ISO9001 certified production.
Global Logistics: Stock available at Shanghai, Guangzhou, Hong Kong, and Beijing ports for quick delivery worldwide.

Trust & Reliability

As a professional manufacturer with a proven track record, Shanghai Zhibang Valve has served diverse markets including North America, South America, Eastern Europe, Southeast Asia, Africa, and Oceania. Our ISO9001 certified facility ensures consistent quality control from raw material inspection to finished product testing. Each valve undergoes hydrostatic and seat leakage tests before shipment. With an annual export value of US$1 million to US$1.5 million, we have earned the trust of international clients. Choose our cast iron marine check valve for dependable performance and peace of mind. Contact us today for a quotation or technical consultation!

Frequently Asked Questions (FAQ)

What media can this check valve handle?
It is suitable for clean water, seawater, oil (up to 60°C), and neutral gases. For aggressive chemicals, consult our engineering team for optional rubber lining.
Is the valve suitable for vertical installation?
Yes, the swing check design allows both horizontal and vertical upward flow installation. For vertical downward flow, a spring-assisted version may be required – available on request.
What flange standards are available?
We offer flanges according to DIN (PN10/16/40), ANSI (150#/300#), and JIS (10K/20K) standards. Other standards can be customized.
Do you provide a warranty?
Yes, we offer a standard 12-month warranty against manufacturing defects. Extended warranty options are negotiable for large orders.
Can I get a sample before bulk order?
Absolutely! Sample orders are welcome. We will provide a proforma invoice with sample cost and shipping details.
How does the valve prevent water hammer?
The swing disc closes gradually as flow decreases, reducing sudden pressure surges. For critical applications, we recommend adding a slow-closing feature (upon request).
What is the lead time for DN150 and DN200 sizes?
For regular sizes (DN50-DN100), stock items can ship within 7-15 days. Larger sizes (DN150-DN200) typically require 20-30 days, depending on quantity.
Is the valve certified for marine classification societies?
While our standard valves comply with ISO9001, we can arrange third-party inspection (e.g., DNV, Lloyd's, ABS) at the buyer's request. Please specify requirements during inquiry.