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Help CenterGB/T1855-1993 Suction Stop Check Box Valve, Cast Iron Body, 1.0MPa Pressure Rating
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As a professional manufacturer with years of expertise in fluid control, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Suction Stop Check Box Valve, designed and built to the rigorous GB/T1855-1993 standard. Engineered for reliability in demanding applications, this valve combines a robust cast iron construction with a precise 1.0MPa pressure rating, ensuring secure backflow prevention and system protection. We understand the critical need for dependable components in industrial piping, and our valve is crafted to deliver long-lasting service, minimizing downtime and maintenance costs for our global clientele across diverse markets from North America to Southeast Asia.
This Suction Stop Check Box Valve is a specialized type of check valve integrated with a stop function, primarily installed on the suction side of pumps. Its core purpose is to allow forward flow, prevent reverse flow (backflow), and provide an isolation capability when needed. The durable cast iron body offers excellent resistance to corrosion and mechanical stress in various water and mild fluid handling systems.
Key Features & Technical Advantages:
- Dual-Function Design: Serves as both a non-return check valve and an isolation stop valve, simplifying piping layouts and potentially reducing the need for separate valves.
- Robust Construction: The main body and critical components are made from high-grade cast iron, known for its strength, durability, and cost-effectiveness for a wide range of industrial applications.
- Reliable Sealing: Features a tight-sealing disc and seat arrangement. The seat material can be customized (e.g., NBR rubber) upon request to match specific fluid compatibility requirements, ensuring leak-free performance.
- Low Pressure Drop: The internal flow path is designed to minimize resistance during forward flow, contributing to energy efficiency in pumping systems.
- Easy Maintenance: The box-type design often allows for easier inspection and maintenance of internal parts compared to some other check valve styles.
- Automatic Operation: The check function works automatically based on flow direction, requiring no external power or manual intervention.
Primary Applications & Benefits for Clients:
- Pump Protection: Installed on pump suction lines to prevent backflow when the pump stops, protecting the pump from water hammer and reverse rotation.
- Water Supply & Distribution: Ideal for municipal water systems, irrigation networks, and building service lines to maintain flow direction and system integrity.
- Industrial Process Lines: Used in various factories for cooling water, process water, and other non-aggressive fluid systems.
- Cost Savings: The combination of stop and check functions in one unit can lead to savings on installation space, piping materials, and valve counts.
- Reduced Downtime: Durable construction and reliable performance mean fewer failures and less frequent replacements.
Typical Technical Specifications:
The table below outlines common specifications. Customization is available for specific project needs.
| Parameter | Specification |
|---|---|
| Product Standard | GB/T1855-1993 |
| Body Material | Cast Iron |
| Nominal Pressure (PN) | 1.0 MPa (PN10) |
| Main Function | Suction Stop & Check |
| Connection Type | Flanged (Standard as per GB) |
| Seat Material | Rubber / NBR (Standard), others optional |
| Disc Material | Cast Iron / Ductile Iron |
| Applicable Medium | Water, Oil, Non-corrosive Liquids |
| Operating Temperature | 0°C ~ 80°C (depending on seat material) |
Shanghai Zhibang Valve backs its products with a commitment to quality, evidenced by our ISO9001 certification which governs our entire manufacturing process. Since our establishment in 2016, we have grown into a trusted supplier, exporting valves worth US$1 Million to US$1.5 Million annually to major markets worldwide, including North America, Europe, and Southeast Asia. This global reach and consistent performance are testaments to the reliability of our products. Our efficient logistics network from ports like Shanghai, Guangzhou, and Hong Kong ensures timely delivery. Choose our GB/T1855-1993 Suction Stop Check Box Valve for a proven solution that safeguards your systems. Contact us today to discuss your requirements or request a detailed quotation.
Frequently Asked Questions (FAQ)
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Q: What is the main purpose of this valve?
A: This valve is primarily used on the suction line of a pump. It allows fluid to enter the pump, prevents backflow when the pump stops (check function), and can also be used to manually isolate the line (stop function). -
Q: Can this valve be used for fluids other than water?
A: Yes, it is suitable for various non-corrosive liquids like oil. However, compatibility depends on the specific fluid properties and the seat material. Please consult with us for your specific medium. -
Q: What does the pressure rating 1.0MPa (PN10) mean?
A: It indicates the valve is designed to withstand a maximum working pressure of 10 bar (approximately 145 psi) at the specified temperature range. It should not be used in systems exceeding this pressure. -
Q: Is the flanged connection standard?
A> Yes, flanged connections are standard as per the GB/T1855-1993 specification. The flange dimensions and drilling will comply with relevant Chinese national standards, which are often compatible with international ones. -
Q: Do you offer customization for different sizes or materials?
A: Absolutely. While standard sizes range from DN50 to DN600, we can manufacture valves in other sizes upon request. Material options for components like the disc or seat can also be discussed based on your application needs. -
Q: How does the stop function work? Is it manual?
A: Typically, the "stop" function in this context refers to the valve's ability to be manually closed (e.g., via a handwheel or lever) to isolate the line completely, similar to a gate valve, in addition to its automatic check function. -
Q: What is the lead time for an order?
A: Lead time varies based on order quantity, specifications, and current production schedule. For standard valves, it is generally shorter. We provide an estimated timeline upon receiving your inquiry. -
Q: What certifications do your valves have?
A> Our manufacturing facility is ISO9001 certified, ensuring a consistent quality management system. Specific product certifications can be provided upon request and are subject to the valve model and destination market requirements.
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