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Home > Industrial Equipment & Components > Valve > Check Valve > GB/T1855 Standard Cast Iron Stop Check Valve, PN1.0MPa Pressure Rating, Soft Seal Design

GB/T1855 Standard Cast Iron Stop Check Valve, PN1.0MPa Pressure Rating, Soft Seal Design

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GB/T1855 Standard Cast Iron Stop Check Valve, PN1.0MPa Pressure Rating, Soft Seal Design photo-1

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GB/T1855 Standard Cast Iron Stop Check Valve, PN1.0MPa Pressure Rating, Soft Seal Design photo-4

GB/T1855 Standard Cast Iron Stop Check Valve, PN1.0MPa Pressure Rating, Soft Seal Design photo-5

Product Spotlights

GB/T1855 standard cast iron stop check valve with PN1.0MPa rating. Combines manual shut-off and automatic check functions in one robust unit. Features a reliable soft seal design for leak-tight performance, reducing maintenance. Manufactured with quality materials under ISO9001, suitable for water, steam, and oil pipelines. Offers space and cost savings for industrial flow control systems.

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

Key Specifications

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Material:

Other, Cast iron

Application:

Other, Water

Pressure Rating:

PN1.0MPa

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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 Other, Cast iron

Application Other, Water

Pressure Rating PN1.0MPa

Design Standard GB/T1855

Seal Type Soft seal design

Valve Type Stop check valve

Connection Type Flanged (standard)

Operation Type Manual handwheel

As a leading manufacturer with a strong commitment to quality and reliability, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our GB/T1855 Standard Cast Iron Stop Check Valve. Engineered for demanding industrial applications, this valve combines robust construction with precise functionality to ensure safe and efficient flow control in your piping systems. With our ISO9001-certified manufacturing processes and a focus on export excellence, we deliver valves that meet international standards and customer expectations. This specific model, designed to a PN1.0MPa pressure rating with a soft seal, offers superior sealing performance and durability, making it a trusted component for engineers and procurement specialists worldwide.

Core Product Features and Technical Advantages:

Dual-Function Design: This valve uniquely integrates the functions of a stop valve and a check valve. It can be used to manually shut off flow and also automatically prevents reverse flow when closed, protecting equipment from backflow damage.
Robust Cast Iron Construction: The valve body and major components are manufactured from high-grade cast iron, providing excellent mechanical strength, corrosion resistance for a wide range of media, and long-term reliability in various industrial environments.
Enhanced Soft Seal Design: Featuring a soft sealing element (typically EPDM, NBR, or other elastomers available upon request), this design ensures a bubble-tight seal, minimizing leakage and reducing maintenance requirements compared to traditional metal-to-metal seals.
GB/T1855 Standard Compliance: Manufactured strictly in accordance with the Chinese National Standard GB/T1855, which specifies the design, dimensions, and technical requirements for iron and steel stop valves. This ensures dimensional interchangeability and reliable performance.
Precise Flow Control: The valve is designed for smooth operation with a handwheel, allowing for precise modulation of flow when in the stop function. The internal disc design ensures low-pressure drop during forward flow.

Detailed Technical Specifications:

Parameter	Specification
Product Standard	GB/T1855
Nominal Pressure (PN)	1.0 MPa (≈10 bar / 145 PSI)
Valve Type	Stop Check Valve (Globe Type)
Body Material	Cast Iron (HT200/HT250)
Seat/Disc Material	Cast Iron / Stainless Steel (Disc) with Soft Seal
Seal Material	EPDM, NBR (Standard), Other elastomers optional
Connection Type	Flanged, RF Face (Standard). Other standards like ANSI, DIN, JIS available upon request.
Operation	Manual Handwheel
Applicable Medium	Water, Steam, Oil, Gas (compatible with seal material)
Applicable Temperature	Depends on seal material: EPDM: -20°C to 120°C / NBR: -10°C to 80°C

Benefits for Your Operations:

System Protection: The integrated check function automatically prevents reverse flow, safeguarding pumps, compressors, and other sensitive equipment from potential damage caused by backflow.
Space and Cost Savings: By combining two valve functions into a single unit, you save on installation space, piping components, and overall project costs.
Reduced Maintenance: The soft seal design offers excellent sealing with less wear on seating surfaces, leading to longer service intervals and lower lifetime costs.
Reliable Performance: Adherence to the GB/T1855 standard and use of quality materials ensure consistent performance, leak-free operation, and compatibility with existing systems designed to similar specifications.
Versatile Application: Suitable for a broad spectrum of applications in HVAC systems, water supply networks, industrial process lines, and general service pipelines handling non-corrosive fluids.

Shanghai Zhibang Valve has established a strong reputation since 2016, supported by an annual export value reflecting consistent global demand. Our products reach key markets across North and South America, Europe, Asia, Africa, and Oceania, facilitated by efficient shipment from major ports like Shanghai, Guangzhou, and Hong Kong. This global footprint is a testament to the reliability and value of our valves. Choosing our GB/T1855 Cast Iron Stop Check Valve means partnering with a certified manufacturer dedicated to quality control under ISO9001. We invite you to experience the durability and performance of this valve. Contact us today to discuss your specific requirements, request a quotation, or learn more about our full valve portfolio.

Frequently Asked Questions (FAQ):

Q: What is the main difference between a stop check valve and a regular check valve?
A: A regular check valve only allows flow in one direction and closes automatically to prevent backflow. A stop check valve has this same check function but also includes a manual handwheel (or actuator). This allows an operator to manually close the valve completely like a stop valve, providing positive isolation, or to hold the disc open to override the check function if needed.
Q: Can this valve be used for steam service?
A: Yes, it can be used for saturated steam service within its pressure and temperature ratings. It is crucial to select the appropriate soft seal material (e.g., EPDM) that can withstand the operating temperature. Please confirm your specific steam parameters with our technical team for seal compatibility.
Q: Are flanges included with the valve?
A: The valve is manufactured with integral flanges as per the standard. Companion flanges, bolts, nuts, and gaskets for installation are typically not included as part of the standard valve supply but can be provided as part of a package upon request.
Q: What other connection standards do you offer besides the standard flanged end?
A> While the standard product features flanges per GB/T standards, we can manufacture valves with flanges to other common standards such as ANSI B16.5, DIN, or JIS based on customer requirements. Please specify your needed standard when inquiring.
Q: What is the lead time for this product?
A: For standard specifications and moderate quantities, we generally maintain stock or can produce within a competitive lead time. Exact lead times depend on the order quantity, specific customization requests, and current production schedule. We provide estimated timelines with every quotation.
Q: How do I determine the correct size (DN) for my application?
A> The valve size (Nominal Diameter, DN) should match your pipeline size. Please provide the pipeline's inner diameter or existing flange specifications. Our technical team can also assist in sizing based on your flow rate, pressure, and medium details.
Q: Is the soft seal replaceable?
A: Yes, a key advantage of the soft seal design is that the sealing ring is generally replaceable. This allows for easier maintenance and extends the overall life of the valve without needing to replace the entire unit.
Q: Do you provide documentation like test reports and certificates?
A: Yes, we can provide standard factory test reports (e.g., shell test, seat test) for our valves. As an ISO9001-certified manufacturer, we maintain full traceability and quality documentation. Specific certification requirements can be discussed during the order process.