Flow-Limiting Check Valve for Fire Protection System
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Product Highlights
- Anti-Water Hammer Design: Slow-closing mechanism prevents hydraulic shock, pipe bursts, and pump damage.
- Zero Leakage Sealing: Resilient-seated bubble-tight sealing ensures no media escape under rated pressure.
- 100% Pressure Tested: Every valve undergoes shell and seat pressure testing to EN 598 / ISO 5208 standards.
- Corrosion-Resistant Material: Constructed with ductile iron and stainless steel for harsh environments.
- Modular Maintenance: Internal components can be serviced without removing the valve from the pipeline.
- Low Head Loss: Optimized flow path design minimizes energy consumption in pumping systems.
- Customizable Materials: Customized flange standards and material options (Ductile Iron, Cast Steel, Stainless Steel) available.
- Multiple Certifications: Certified by CE, GS, ISO9001, EAC, FM, WRAS, SIL, and PED.
Product Attributes
- Customization
- Available
- Media
- Water
- Temperature
- Ordinary Temperature
- Model NO.
- ZFH41X-2
- Material
- Cast Iron
- Connection Form
- Flange
- Structure
- Butterfly
- Pressure
- Ordinary Pressure
- Function
- Nrvr Silence, Sfcv Rubber Lobe
- Sealing Form
- Soft Rubber Seal
- Flow Direction
- Unidirection
- Standard
- GB
- Application
- Industrial Usage, Water Industrial Usage
- Product Name
- Micro Resistance Slow Closing Check Valve
- Model
- Hh49X-10q-DN600
- Valve Type
- Slow Closing Butterfly Check Valve
- Nominal Diametre
- DN600
- Nominal Pressure
- Pn10
- Working Temperature
- 0℃ ~ 80℃
- Valve Body
- Ductile Iron
- Internal Component
- Stainless Steel + Rubber
- Advantages-01
- Micro Resistance, Low Head Loss
- Advantages-02
- Slow Closing to Prevent Water Hammer
- Certification
- GS, CE, ISO9001
- Transport Package
- Seaworthy Wooden Case
- Specification
- DN600
- Trademark
- Zentif
- Origin
- China
- HS Code
- 8421199090
- Production Capacity
- 50000
- Package Size
- 120.00cm * 85.00cm * 75.00cm
- Package Gross Weight
- 280.000kg
Shipping
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Flow-Limiting Check Valve for Fire Protection System
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Flow-Limiting Check Valve for Fire Protection System -
Flow-Limiting Check Valve for Fire Protection System -
Flow-Limiting Check Valve for Fire Protection System -
Flow-Limiting Check Valve for Fire Protection System -
Flow-Limiting Check Valve for Fire Protection System -
Flow-Limiting Check Valve for Fire Protection System -
Flow-Limiting Check Valve for Fire Protection System
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Product Description
Product Description
High-Performance Industrial Check Valves Supplier
ISO-Certified Resilient-Seated Slow-Closing Check Valves for HVAC, Fire Protection & Water Systems
Key Features
Self-Operated / Motorized Actuation Options, compatible with various control signals (for motorized variants).
100% pressure tested to EN 598 / ISO 5208 standards.
Zero leakage with resilient-seated bubble-tight sealing.
Anti-water hammer slow-closing design (standard on most models, adjustable).
Lightweight, compact structure for space-saving installation.
Corrosion-resistant ductile iron/stainless steel construction for harsh environments.
Modular structure for easy maintenance and replacement.
Working Principle
The regulating valve precisely controls the flow rate by adjusting the opening degree of the disc or plug inside the valve body. Driven by the actuator, the stem moves the regulating element to any desired position between fully open and fully closed. This continuous modulation capability allows accurate control of flow, pressure, or temperature according to system requirements, making it ideal for automated pipeline control systems.
100% pressure tested to EN 598 / ISO 5208 standards.
Zero leakage with resilient-seated bubble-tight sealing.
Anti-water hammer slow-closing design (standard on most models, adjustable).
Lightweight, compact structure for space-saving installation.
Corrosion-resistant ductile iron/stainless steel construction for harsh environments.
Modular structure for easy maintenance and replacement.
Working Principle
The regulating valve precisely controls the flow rate by adjusting the opening degree of the disc or plug inside the valve body. Driven by the actuator, the stem moves the regulating element to any desired position between fully open and fully closed. This continuous modulation capability allows accurate control of flow, pressure, or temperature according to system requirements, making it ideal for automated pipeline control systems.
Applications
HVAC Chilled Water System
Industrial Fire Pump Station
Municipal Drainage Network
High-rise Building Water Supply Systems
Wastewater Treatment Plants
Industrial Water Circulation Pipelines
Advatages
100% Pressure Tested to EN 598 / ISO 5208 – Every valve undergoes shell and seat pressure testing before shipment.
Zero Leakage Design – Resilient-seated bubble-tight sealing ensures no media escape under rated pressure.
Anti-Water Hammer Slow-Closing Mechanism – Prevents hydraulic shock, pipe bursts and pump damage.
Low Head Loss – Optimized flow path design minimizes energy consumption in pumping systems.
Compact & Lightweight – Space-saving design for easy installation and low cost.
Modular Maintenance – Internal components can be serviced without removing the valve from the pipeline.
Corrosion-Resistant Coating & Seals – Suitable for water, sewage, wastewater and industrial fluid applications.
Industrial Fire Pump Station
Municipal Drainage Network
High-rise Building Water Supply Systems
Wastewater Treatment Plants
Industrial Water Circulation Pipelines
Advatages
100% Pressure Tested to EN 598 / ISO 5208 – Every valve undergoes shell and seat pressure testing before shipment.
Zero Leakage Design – Resilient-seated bubble-tight sealing ensures no media escape under rated pressure.
Anti-Water Hammer Slow-Closing Mechanism – Prevents hydraulic shock, pipe bursts and pump damage.
Low Head Loss – Optimized flow path design minimizes energy consumption in pumping systems.
Compact & Lightweight – Space-saving design for easy installation and low cost.
Modular Maintenance – Internal components can be serviced without removing the valve from the pipeline.
Corrosion-Resistant Coating & Seals – Suitable for water, sewage, wastewater and industrial fluid applications.
Technical Parameter
Product Category | Nominal Size (DN) | Pressure Rating | Body Material | Control / Actuation |
Differential Pressure Valve | DN50 - DN600 | PN16 / PN25 | Ductile Iron GGG50 | Self-Operated (Pilot) |
Dynamic Balancing Valve | DN50 - DN300 | PN16 | Cast Steel / DI | Electric (0-10V/4-20mA) |
Pump Control Valve | DN50 - DN1000 | PN10 / PN16 | Ductile Iron / WCB | Hydraulic / Diaphragm |
SS Pressure Reducer | DN15 - DN200 | Max PN40 | SS304 / SS316 | Direct Acting / Spring |
Water Hydraulic Valve | DN50 - DN1200 | PN16 / Class 150 | GGG50 / Epoxy Coated | Remote Floating / Manual |
Electric Two-Way Valve | DN25 - DN200 | PN16 | Bronze / Cast Iron | Proportional Integral |
We offer customized flange standards and material options (Ductile Iron / Cast Steel / Stainless Steel) to meet project-specific requirements in different regions. OEM/ODM customization and technical drawing (PDF/CAD) requests are available. | ||||
Main Products
Company Profile
Certifications
CE/EAC/ /FM/WRAS/SIL/PED
FAQ
Q1: How to select the right check valve for water supply and industrial pipeline systems?
A: For water supply, pump outlets, and industrial pipelines, swing check valves or resilient seated check valves are commonly recommended. It is important to consider flow velocity, pressure rating (PN10/PN16), and installation orientation. For applications requiring slow closure to prevent water hammer, slow-closing or damped check valves should be selected.
Q2: What makes check valves essential in fire protection and pump station systems?
A: Check valves play a critical role in fire protection and pump stations by preventing backflow and protecting pumps from reverse rotation. They automatically close when forward flow stops, ensuring system safety and maintaining pressure. Resilient seated or double-door check valves are particularly popular due to their reliable sealing and low pressure drop.
Q3: Are check valves suitable for high-frequency flow changes and automated systems?
A: Standard check valves are designed for automatic operation based on flow direction. For systems with frequent flow changes, silent check valves or spring-loaded check valves are recommended as they close quickly and quietly, reducing water hammer. High-quality designs with proper damping can handle demanding conditions effectively.
Q4: What are the main advantages of check valves in HVAC and chilled water systems?
A: Check valves are widely used in HVAC and chilled water systems to prevent reverse flow and protect equipment such as pumps and chillers. They feature low cracking pressure, tight shutoff, and minimal pressure loss when open. Their compact design and reliable performance help maintain system efficiency and protect sensitive components from damage caused by backflow.
A: For water supply, pump outlets, and industrial pipelines, swing check valves or resilient seated check valves are commonly recommended. It is important to consider flow velocity, pressure rating (PN10/PN16), and installation orientation. For applications requiring slow closure to prevent water hammer, slow-closing or damped check valves should be selected.
Q2: What makes check valves essential in fire protection and pump station systems?
A: Check valves play a critical role in fire protection and pump stations by preventing backflow and protecting pumps from reverse rotation. They automatically close when forward flow stops, ensuring system safety and maintaining pressure. Resilient seated or double-door check valves are particularly popular due to their reliable sealing and low pressure drop.
Q3: Are check valves suitable for high-frequency flow changes and automated systems?
A: Standard check valves are designed for automatic operation based on flow direction. For systems with frequent flow changes, silent check valves or spring-loaded check valves are recommended as they close quickly and quietly, reducing water hammer. High-quality designs with proper damping can handle demanding conditions effectively.
Q4: What are the main advantages of check valves in HVAC and chilled water systems?
A: Check valves are widely used in HVAC and chilled water systems to prevent reverse flow and protect equipment such as pumps and chillers. They feature low cracking pressure, tight shutoff, and minimal pressure loss when open. Their compact design and reliable performance help maintain system efficiency and protect sensitive components from damage caused by backflow.
About the Supplier
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Company Profile
Shanghai Zentif Valve Group Co., Ltd. is a leading professional valve manufacturer in China with over 30 years of industry experience. We specialize in designing and producing high-quality valves for water systems, HVAC, and fire protection applications, offering reliable OEM/ODM services and customized hydraulic balancing solutions for global projects.
Founded in 1991 in Shanghai, Zentif has grown from a dedicated valve producer into an internationally oriented enterprise. Key milestones include a Hong Kong joint venture in 2001, enhancing global management and standards, and the establishment of a modern production base in Binhai, Jiangsu in 2008, significantly expanding our manufacturing capacity. In 2025, our headquarters will relocate to Jiangqiao, Shanghai, further strengthening logistics, innovation, and global market reach.
Our product range includes globe valves, gate valves, ball valves, butterfly valves, strainers, and air release valves, widely used in municipal engineering, commercial buildings, industrial facilities, and infrastructure projects. We provide integrated solutions that improve flow control, energy efficiency, and system reliability.
Zentif stands out for its strong customization capabilities. From design to delivery, our engineering team works closely with clients to provide tailored solutions based on specific project requirements. Supported by advanced CNC machinery, automated production lines, and rigorous testing systems, we ensure high precision, durability, and performance.
We strictly comply with international standards such as ISO and CE, with comprehensive quality control at every stage. Our products are trusted across Asia, Europe, the Middle East, and other global markets.
Looking ahead, Zentif is committed to innovation in smart valves, energy-saving technologies, and sustainable materials. Guided by our philosophy of "Engineering-Oriented Design, Quality Manufacturing, and Long-Term Cooperation, " we aim to become a global leader in valve manufacturing and system solutions.
We welcome distributors, contractors, and partners worldwide to collaborate with us and build efficient, reliable, and sustainable fluid control systems together.
Welcome to visit our factory! We are never far away here around you! Zentif valve group is top valves manufacturer in China with top quality process production facility here. We mianly offer, 05 Flowrate Adjustable Valve as follwing:
01 Control Valve
02 Gate Valve
03 Butterfly Valve
04 Check Valve
05 Type Filter
06 Rubber Disc Check Valve
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- No. 111 Huangjia Garden Road, Jiangqiao Town, Jiading District, Shanghai, China
-
Plant Area
- 12819.22 square meters
-
Number of Employees
- 81
-
Registered Capital
- 55,484,089 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Shanghai Port
-
Minimum Order Quantity
- 500 PICS
-
Supply Chain Partners
- 12
Our Production Capability & Technical Expertise
-
Main Products
- angle valve
-
Production Lines
- 5
-
Production Machines
- CNC Lathe, Lathe, Shot Blasting Facility, Vertical Lathe
-
QA/QC inspectors
- 3 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Designs
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 2 people
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2001-03-20
-
Export Year
- N/A
-
Main Markets
- Domestic
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 4
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Cooperated with Fortune 500
- No
FAQ
- Are you a manufacturer or a trader? Where is your factory located?
- We are a professional manufacturer with our own factory located in Jiangsu, China. We have been specializing in the production of high-quality industrial valves for over 30 years.
- What is the product size range and material?
- Our main products include Gate Valves, Butterfly Valves, Check Valves, Pressure Reducing Valves, Backflow Preventers, etc. Size Range: DN50 to DN1200 (2" to 48") Main Materials: Ductile Iron, Cast Iron, Stainless Steel (304/316), WCB Carbon Steel Pressure Rating: PN10, PN16, PN25, Class 125 / Class 150 Connection Type: Flange, Wafer, Lug, etc.
- What is the nearest shipment port and how far is it from your location?
- The nearest major port is Shanghai Port, which is very convenient as our office is located in Shanghai. Our factory in Jiangsu is only about 200-250 km from Shanghai Port, enabling fast and efficient shipping.
- What are your acceptable payment terms?
- Our standard payment terms include: T/T (30% deposit, 70% balance before shipment) L/C at sight (for large orders) Western Union / PayPal (for sample orders) Flexible terms can be discussed according to order value.
- What international certificates do you have?
- We have obtained multiple international certifications, including: CE/EAC/WRAS/FM/ISO 9001/ISO 45001/ISO 14001
- What is your MOQ (Minimum Order Quantity)?
- Sample Order: MOQ is 1 piece Regular Order: Usually 10 to 50 pieces (depends on valve type and size) We are flexible and welcome trial orders from new customers.
- What is your production capacity?
- Our monthly production capacity is around 8,000 to 12,000 pieces, depending on product specifications. We maintain stock for popular models to support quick delivery.
- Do you have customers globally?
- Yes. We have long-term customers in over 40 countries worldwide, including the United States, Russia, Indonesia, Brazil, Mexico, Vietnam, Thailand, Turkey, Philippines, and many more across Europe, Southeast Asia, the Middle East, and South America.
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