ALL CATEGORIES

Seller Center
- Product Management
  
  Post Product
  
  Manage Products
  
  Featured Products
- Blog Management
  
  Post Blog Article
  
  Manage Blog Articles
  
  Manage Blog Categories
- Inquiry Management
  
  My Inquiries
  
  Buying Requests
- Analytics Center
  
  Performance Dashboard
  
  Product Analytics
  
  Visitor Analytics
Connect Your Store to WeChat

Follow Our Official Service Account
Manage Products & Inquiries Anywhere
Seller Services

Seller Services

Goldsupplier.com: 20 years of Global Trade Expertise, Empowering Your Business to Go Global!

Join GoldSupplier.com

Free & Instant Registration

Showcase Company & Products

Access Global Buying Requests

Register Now

Activate Verified Supplier Membership

Priority Verified Visibility

Claim Exclusive Buying Requests

Automated Multi-language Store

Verified Now

Launch Your EasyOcean Website

Full-Service Website Management

Google Page 1 Guarantee

Enhanced Brand Credibility

Launch Now
Buyer Services
Post Buying Request

Browse Product Categories

Featured Suppliers
Contact Platform Support

Help Center

Home > Industrial Equipment & Components > Valve > Check Valve > Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating thumbnail-3

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating thumbnail-4

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating thumbnail-5

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating photo-1

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating photo-2

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating photo-3

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating photo-4

Ductile Iron Stop Check Valve Compliant With GB/T1855 Standard, PN16 Pressure Rating photo-5

Product Spotlights

Ductile Iron Stop Check Valve combining shut-off and check functions in one robust unit. Compliant with GB/T1855 standard and rated PN16 for reliable medium-pressure service. Features durable ductile iron construction for enhanced strength and longevity. Offers space and cost savings by eliminating the need for two separate valves. Suitable for water, oil, gas, and steam applications in diverse industrial settings. Backed by ISO9001-certified manufacturing and global export experience.

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

Key Specifications

Get Latest Price

Material:

Other, Ductile Iron

Application:

Other, Industrial pipeline systems

Pressure Rating:

PN16

Contact Supplier Request Quote Chat Now

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
Company Profile
Contact Us

Material Other, Ductile Iron

Application Other, Industrial pipeline systems

Pressure Rating PN16

Standard Compliance GB/T1855

Valve Type Stop Check Valve

Connection Type Flanged (common)

Operation Type Manual (common)

Seal Material Optional (e.g., EPDM, NBR)

Size Range Available upon request

As a professional valve manufacturer since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable fluid control solutions for global industrial markets. Our Ductile Iron Stop Check Valve compliant with GB/T1855 standard and PN16 pressure rating represents our commitment to engineering robust and dependable valves designed for demanding applications. This valve combines the strength of ductile iron with precise functionality, ensuring safe and efficient operation in your pipeline systems.

This stop check valve is engineered to perform two critical functions: it acts as a standard stop valve to isolate flow, and incorporates a check mechanism to prevent reverse flow, protecting upstream equipment. Its compliance with the GB/T1855 standard ensures adherence to specific design, material, and testing requirements for iron valves in China, providing a recognized benchmark for quality.

Key Features & Technical Advantages:

Durable Ductile Iron Construction: The valve body is crafted from high-grade ductile iron (nodular cast iron), offering superior tensile strength, impact resistance, and pressure-bearing capability compared to standard cast iron, ensuring long service life even under fluctuating pressures.
Dual-Function Design: Integrates the shut-off capability of a globe valve with the backflow prevention of a check valve, saving space and installation costs compared to using two separate valves.
PN16 Pressure Rating: Rated for a nominal pressure of 16 bar, making it suitable for a wide range of medium-pressure industrial water, oil, gas, and steam applications.
Standard Compliance: Manufactured in full compliance with the GB/T1855 standard, which governs the technical specifications for iron gate valves, ensuring dimensional interchangeability, material integrity, and performance reliability.
Reliable Sealing: Features precision-machined seating surfaces and high-quality seal materials (options like EPDM or NBR available) to provide bubble-tight shut-off and effective check function, minimizing leakage.
Robust Stem & Disc Assembly: The stem and disc are designed for smooth operation and minimal wear. The check mechanism allows the disc to swing freely, closing automatically upon flow reversal.
Flanged Connections: Typically equipped with standard flanged ends (as per GB, ANSI, or DIN standards upon request) for secure and leak-free connection to pipeline flanges, facilitating easy installation and maintenance.
Versatile Applications: Ideal for use in power plants, water supply and distribution networks, HVAC systems, chemical processing, and other industrial pipelines where flow control and backflow prevention are crucial.

Detailed Technical Specifications:

Parameter	Specification
Product Type	Stop Check Valve
Body Material	Ductile Iron
Design Standard	GB/T1855
Nominal Pressure	PN16
Connection Type	Flanged (Standard)
Operation	Manual Handwheel
Seat Seal Material	EPDM / NBR / Others (Customizable)
Disc Material	Ductile Iron or Coated
Stem Material	Stainless Steel (common)
Temperature Range	Depends on seal material (e.g., -10°C to 120°C for EPDM)
Medium	Water, Oil, Gas, Steam (non-aggressive)

Benefits for Your Operation:

Enhanced System Safety: Prevents potentially damaging backflow, protecting pumps, compressors, and other sensitive equipment.
Space and Cost Efficiency: The combined stop and check function eliminates the need for two separate valves, reducing footprint, weight, and overall project cost.
Reduced Maintenance: The robust ductile iron construction and reliable design lead to fewer failures and lower lifetime maintenance costs.
Operational Flexibility: Allows for positive shut-off when needed while providing automatic check protection during normal operation or system shutdowns.
Global Compatibility: While compliant with GB/T1855, flanged dimensions can often be supplied to match other major standards like ANSI or DIN, facilitating integration into existing international systems.

Backed by our ISO9001-certified quality management system and nearly a decade of manufacturing expertise since 2016, every valve undergoes rigorous inspection to ensure it meets specified standards. Our products have gained trust in diverse markets across North America, South America, Europe, Asia, Africa, and Oceania, with an annual export value demonstrating our global reach and reliability. We offer flexible shipping from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. Choose Shanghai Zhibang's Ductile Iron Stop Check Valve for a durable, compliant, and high-performing solution that safeguards your pipeline integrity. Contact us today for detailed specifications, pricing, and to discuss your specific project requirements.

Frequently Asked Questions (FAQ):

Q: What is the primary difference between a standard check valve and this stop check valve?
A: A standard check valve only prevents reverse flow. This stop check valve adds a manual handwheel-operated stem that can forcibly close the disc, providing positive isolation like a shut-off valve, in addition to its automatic check function.
Q: Can this valve be used for steam service?
A: Yes, it is suitable for steam applications within its pressure (PN16) and temperature limits. The specific temperature limit depends on the selected seat seal material (e.g., EPDM has a lower max temperature than metal seals). Please consult us for your specific steam conditions.
Q: Are flanges compliant with international standards like ANSI or DIN available?
A: Yes. While the valve is manufactured to the GB/T1855 standard for design and testing, we can often supply valves with flanges drilled and faced according to ANSI, DIN, or other standards upon request to match your existing piping.
Q: What is the advantage of using ductile iron over gray cast iron?
A: Ductile iron has significantly higher tensile strength, better impact resistance, and offers greater durability, especially under pressure surges and mechanical stress, leading to a longer and more reliable service life.
Q: Is this valve suitable for potable water systems?
A: It can be used in water systems. For potable water, specific material certifications or coatings (like epoxy lining) may be required to ensure water quality compliance. Please inform us of this application so we can advise on suitable options.
Q: What is the typical lead time for an order?
A: Lead time depends on the order quantity and specific requirements (size, flange standard, etc.). Standard sizes may have shorter lead times. We provide clear timelines upon receiving your detailed inquiry.
Q: Do you provide testing reports for the valves?
A: Yes, as part of our ISO9001 quality procedures, valves undergo factory tests. Standard testing like shell tests and seat tests can be documented, and test reports are available upon request.
Q: Can the valve be installed in any orientation?
A: For optimal performance of the check function, installation with the stem vertical or horizontal is generally recommended. Installation with the stem facing downwards is typically not advised. Please refer to the installation manual for specific guidance.