Verticale terugslagklep
Nominale diameter: 1/2”-20''(DN15-DN500)
Nominale druk：Klasse 150-Klasse 2500 (1,0 MPa-320 MPa)
Maximale bedrijfstemperatuur: 425℃
SchelpmateriaalWCB，WCC，A105，F304，F316，F316L，N06625，CF8, CF3, CF3M, CW6MC, CY40, M35-1,Inconel 718，N10276，CF8M，Monel K500
Ontwerpnormen：API 6D, ASME B16.34,EN 12334,DIN 3840,JIS B2074
VerbindingFlens
Rijmodus: Automatic
Verticale terugslagklep
Productdefinitie en veiligheidsmissie:
The Vertical Check Valve is a core component in industrial piping systems, enabling unidirectional flow of media and overcoming systemic pain points of traditional check valves in vertical pipelines, such as slow closing, water hammer, and seal failure. This dedicated vertical check valve, through gravity-assisted closing and a streamlined design, provides a fast-response, tight-sealed anti-backflow solution for vertical pipelines.
JH Vertical Check Technology Gene
- Fast shutdown → Shutdown time ≤ 0.8s (API 6D)
- Low water hammer design → Peak water hammer pressure ≤ 1.5 times working pressure (AWWA C508)
- Ultra-long lifespan → Mechanical life ≥ 500,000 cycles (API 6D)
- Lekvrije afdichting → Lekclassificatie Klasse IV (API 598)
- Producttechnische analyse
- Vertical Lift
- Spring-Assisted Vertical
- Axial Flow Vertical
The industrial-grade vertical check valve is based on in-depth innovation in fluid dynamics and gravity principles. The valve body adopts a special vertical installation structure (API 6D standard), and achieves rapid response to the instant of media backflow through precise calculation of valve disc weight and flow channel area. The closing system adopts a dual acceleration mechanism of self-weight as the main force and spring assistance, and completes the sealing action within 0.8 seconds, effectively preventing media backflow. The sealing system, through precision-machined metal sealing surfaces or composite soft seal design, achieves zero leakage according to API 598 Class IV while ensuring a service life of 500,000 cycles. The guide mechanism uses low-friction materials and precise clearance control, combined with a buffer design to effectively eliminate water hammer effect and protect the pipeline system safety.
The vertical lifting type adopts a vertical guiding structure and self-weight assisted closure to achieve a rapid response to the instant of medium backflow, completely eliminating the backflow problem caused by the delayed closure of traditional check valves, and is suitable for general working conditions of vertical pipelines.
Kernontwerp:
▌ Vertical guide design →Guide length ≥ 1.5 times valve disc diameter (API 6D) | Straightness of movement ≤ 0.05mm
▌ Weight-based accelerated closing → Precise calculation of valve disc weight (API 6D) | Closing time ≤ 0.6s
▌ Streamlined flow channel → Flow resistance coefficient ≤ 0.35 (ISA 75.01.01) | Pressure loss ≤ 0.02MPa
▌ Sealing surface reinforcement → Sealing surface overlay with Stellite 12 | Hardness ≥ 56HRC (AWS ERCoCr-A)
The spring-assisted type enhances the closing speed by pre-tightening the spring force, overcoming the sealing impact problem caused by excessive backflow of medium under high pressure conditions, and is suitable for high pressure and low flow conditions.
Kernontwerp:
▌ Spring Acceleration Mechanism → Adjustable spring preload range 20-200N (API 6D) | Closing time ≤0.4s
▌ High-pressure sealing → Sealing pressure ≥ 3.5 MPa (API 598) | Leakage rate ≤ 0.0001% Cv
▌ Impact-resistant design → 3-8mm cushioning travel (API 6D) | 70% reduction in impact force
▌ Precision Guide → Stainless Steel Guide Sleeve (ASTM A479) | Coefficient of Friction ≤ 0.08
The axial flow type adopts a straight-through flow channel and a lightweight valve disc, which minimizes flow resistance while ensuring rapid closure, thus meeting the energy-saving requirements of high-flow-rate, low-pressure-drop systems.
Kernontwerp:
▌ Axial flow design→ Flow channel turning angle ≤15° (API 6D) | Flow resistance coefficient ≤0.25
▌ Lightweight valve disc→ 50% weight reduction (compared to traditional structures) | 60% reduction in moment of inertia
▌ Low water hammer optimization→ Adjustable slow-closing characteristic (AWWA C508) | Water hammer pressure ≤ 1.3 times working pressure
▌ Self-centering structure→ Floating valve disc design (API 6D) | Uniform wear on sealing surfaces
Kernontwerp en voordelen
- Instantaneous and rapid shutdown: The Vertical Check Valve employs a gravity-accelerated design → shutdown time ≤ 0.8s (API 6D) | Zero backflow medium passage, completely eliminating the risk of backflow.
- Absolutely reliable sealing: Dual choice of metal/soft seal → Leakage rating Class IV (API 598) | Service life ≥ 500,000 cycles, maintenance intervals extended by 5 times
- Effective water hammer control: Buffer shutdown and flow adaptive → Water hammer peak value ≤ 1.3 times (AWWA C508) | Pipeline vibration reduced by 80%, significantly improving system safety.
- Ultralage stromingsweerstand en energiebesparing: Axial flow optimized channel design → Flow resistance coefficient ≤ 0.25 (ISA 75.01.01) | Energy consumption reduced by 35%, significantly saving operating costs.
- Eenvoudige installatie: Optimized vertical structure → 40% reduction in installation time | 70% reduction in alignment requirements, significantly improving project efficiency.
- Adaptable to all working conditions: Adjustable spring preload design → Pressure range 0.1-15MPa | Media adaptability expanded by 3 times, comprehensively covering application fields.
Overige producten
FAQ-Vertical Check Valve
Vertical Check Valves are specifically designed for vertical pipeline installation where the medium flows bottom to top. They are widely used in building water supply, fire protection systems, and at industrial pump discharges to effectively prevent backflow and protect equipment.
The main types suitable for vertical installation are:
Vertical Lift Check Valves: The most typical type for vertical installation, relying on disc weight and medium pressure to close, offering good sealing.
Spring-Assisted Vertical Check Valves: An internal spring ensures quick closing, and some designs allow for multiple installation orientations.
Vertical Axial Flow Check Valves: Employ a spring-assisted axial design with low flow resistance and rapid closing, effectively reducing water hammer risk.
Key selection factors include:
Installation Space & Orientation: Confirm it’s a vertical pipeline with sufficient space for installation and maintenance.
Kenmerken van de media: Define media pressure, temperature, corrosiveness, and whether it contains solids.
Performance Requirements: Evaluate sealing class, allowable pressure drop, closing speed, and water hammer prevention capability.
Verbindingstype: Choose connections like Flanged, Threaded, Wafer (Dual Plate), or Butt-Weld based on the piping system.
During installation, it is essential to:
Bevestig de stroomrichting: Ensure the medium flow direction exactly matches the arrow on the valve body.
Correct Installation of Lift Type: Vertical lift check valves moeten be installed on vertical pipelines with bottom-to-top flow.
Bied ondersteuning: For larger/heavier valves, the pipeline should provide independent support to prevent the valve from bearing undue stress.
Ruimte reserveren: Leave sufficient space for potential future maintenance activities.
Our Vertical Check Valves are manufactured in strict compliance with international codes and hold major certifications including API, ISO, CE, ABS, BV en CCS. This ensures excellence in materials, design, manufacturing, and testing, meeting global project procurement requirements. Valve design and manufacturing also adhere to industry standards such as EN 16767 En BS 1868.
Material selection depends on the media properties:
General Media (Water, Steam): Gietstaal (WCB) of Koolstofstaal kan gebruikt worden.
Corrosieve media (bijv. zuren, basen): Vereist Roestvrij staal (bijv. CF8/304, CF8M/316), Legering 20, or superior materials like Duplex roestvrij staal.
Gebruik bij hoge temperaturen: Requires materials like Chroom-molybdeenstaal (bijv. WC6, WC9).
Our technical team can provide professional material selection advice.
Veelvoorkomende fouten en tegenmaatregelen:
Disc Won’t Close or Leakage: Could be caused by foreign object obstruction or damaged seal surface. Install a strainer/filter upstream and perform regular inspection/cleaning. Severe cases may require lapping the seal surface or part replacement.
Disc Vibration or Abnormal Noise: Might be due to spring failure or operating conditions deviating from design. Check/replace the spring and verify operating conditions.
Waterhamer: Rapid valve closing in high-pressure or large-diameter lines can cause water hammer. Select check valves with non-slam characteristics of axial flow types designed to reduce water hammer.
Yes, and this is one of their typical applications. Installed at the pump discharge, they effectively prevent media backflow when the pump stops, protecting the pump. It is advisable to select types with fast closing speed En good water hammer prevention, zoals Axial Flow Check Valves of Spring-Assisted Check Valves.