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Premium Wholesale Backflow Preventer for Safe Water Supply
US$100.00-500.00
1 Piece
Sample price:US$120.00/piece.Request sample
Product profile
Customization
AvailableTemperature
High TemperatureCertification
GS, CE, ISO9001Model NO.
ZF200X-49Media
Gas, Oil, Water, AcidStandard
StandardConnection Mode
FlangePower
HydraulicMaterial
Stainless SteelType
Self-OperatedProduct Name
Control ValveModel
Zf-Dynamic SeriesValve Type
Flow Control ValveFunction
Automatic Flow BalancingNominal Diameter
DN15- DN600Nominal Pressure
Pn16 / Pn25Flow Accuracy
±5%Working Temperature
0℃ ~ 150℃Control Range
Adjustable Flow RateValve Body
Ductile Iron / Cast Steel / Stainless SteelInternal Components
Stainless SteelSpring Material
Stainless SteelApplication
HVAC Systems Heating Systems Cooling Systems WaterAdvantages-01
Improve System EfficiencyAdvantages-02
Automatic Flow Balancing Without Manual AdjustmentTransport Package
Wooden CaseSpecification
DN50-DN150(Customizable according to needs)Trademark
ZentifOrigin
ChinaHS Code
8421199090Production Capacity
500000Key features
Self-Operated Pilot Control: No external power required; automatically adjusts valve opening based on downstream pressure changes.
Zero Leakage Design: Bubble-tight sealing ensures no media escape under rated pressure for enhanced safety.
Anti-Water Hammer Protection: Slow-closing mechanism protects pipelines from hydraulic shock and potential bursts.
100% Pressure Tested: Every valve undergoes shell and seat pressure testing per ISO 5208 standard before shipment.
Modular Maintenance Design: Pilot tubing and diaphragm can be serviced without removing the valve from the pipeline.
Corrosion-Resistant Materials: Suitable for harsh environments including sewage, wastewater, and industrial drainage applications.
Wide Customization Options: Customizable flange standards and materials (SS304/SS316/WCB) to meet specific project needs.
Company profile
CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Designs CertifiedExport Year: N/A CertifiedNearest Port: Shanghai PortAverage Response Time: ≤5.64h
About Our Factory & Business Background
AddressNo. 111 Huangjia Garden Road, Jiangqiao Town, Jiading District, Shanghai, China
Plant Area12819.22 square meters
Number of Employees81
Registered Capital55,484,089 RMB
Terms of PaymentLC, T/T, D/P, PayPal, Western Union, Small-amount payment
International Commercial Terms(Incoterms)FOB, CIF, CFR, EXW
Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays
Minimum Order Quantity500 PICS
Supply Chain Partners12
Our Production Capability & Technical Expertise
Main Productsangle valve
Production Lines5
Production MachinesCNC Lathe, Lathe, Shot Blasting Facility, Vertical Lathe
QA/QC inspectors3 people
Inspection Type for Finished Products100% inspection(Visual inspection & Function inspection)
Inspection Method for Finished ProductsHave instructions and uniformly followed
R&D Engineers2 people
Traceability of Raw MaterialsYes
Our Industry Experience & Global Business Record
Year of Establishment2001-03-20
Main MarketsDomestic
Repeat Buyers Choice50%~80%
Number of Foreign Trading Staff4
Overseas Agent/BranchNo
New Products Launched in Last yearNo
Our Certifications, Standards & Industry Recognition
Cooperated with Fortune 500No
Product Q&A
Q:How to select the ideal control valve for systems with fluctuating pressure?
A:
In HVAC or high-rise water supply networks, pressure instability is a common challenge. For consistent downstream stability, a Self-Operated Differential Pressure Control Valve or a Proportional Control Valve is recommended. These valves function without external power, utilizing a pilot guide to sense pressure changes and automatically adjust the main valve opening. This prevents system over-pressure and ensures the safety of terminal equipment.
Q:What is the best way to prevent water hammer in fire protection systems?
A:
Fire pumps often generate a massive surge (water hammer) during startup, which can lead to pipe bursts. The professional solution is installing a Multi-Functional Pump Control Valve or a dedicated Water Hammer Arrestor Valve. These units feature adjustable opening and slow-closing speeds, effectively dissipating kinetic energy and protecting the infrastructure of Fire Pump Rooms from hydraulic shock.
Q:Are solenoid control valves durable enough for high-frequency drainage automation?
A:
Traditional solenoid valves often suffer from coil burnout or seal wear in high-frequency operations. Zentif's Solenoid Control Valves utilize a diaphragm-based structure rather than a piston design, resulting in lower friction and faster response. Combined with corrosion-resistant seals, these valves maintain bubble-tight performance even in sewage or industrial wastewater environments, significantly extending maintenance intervals.
Q:How to solve thermal imbalance in HVAC chilled water systems?
A:
Thermal imbalance is usually caused by static hydraulic deviation. The most effective fix is the installation of a Dynamic Balancing Electric Control Valve or a Proportional Integral Electric Two-Way Valve. These valves automatically adjust the flow area based on real-time load requirements. Even if the pressure in other branches changes, the valve maintains its own constant flow, eliminating hot/cold spots and maximizing energy efficiency.
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Shanghai Zentif Valve Group Co., Ltd.
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