China High Quality Check Valve Manufacturer
JiangHeng Group’s check valve products are known for their high quality, high efficiency and high service life, and each JH check valve has its own exclusive digital identity to ensure traceability.
JiangHeng check valve is a one-way fluid control device, and its main function is to prevent the medium from flowing back into the pipeline, which causes the pipeline equipment due to the flow of the medium backflow caused by damage. It uses the pressure difference in the direction of the medium flow to control the opening and closing of the disc (automatic closing when the pressure is low) to ensure that the medium flows in the set direction. It is suitable for water pump fire protection, pipeline inlet pipe, and other systems.
According to your requirements, JiangHeng can also customize special check valves containing rare materials, sizes, sealing surface materials, driving methods, pressure sizes, colors and other requirements.
Whether you choose a check valve for industrial or general use. JiangHeng is your best supplier. We offer competitive prices while also guaranteeing quality.
FAQ-Check Valve
A check valve is a one-way flow control valve that automatically opens and closes by the medium’s own pressure to prevent fluid backflow . It is widely used in water pump outlets, pipeline systems, chemical plants and other scenarios to protect equipment from backflow shock and ensure process safety and efficiency.
The following should be considered when selecting:
- Valve Type :
- Swing check valve (suitable for large flow)
- Lift check valve (applicable to vertical pipelines)
- Butterfly check valve (low pressure fast closing)
- Silent check valve (to prevent water hammer noise)
- Medium characteristics (liquid/gas, corrosivity, viscosity)
- Pressure rating (working pressure and closing pressure)
- Installation direction (horizontal or vertical pipe)
- Common materials : cast iron (low cost), stainless steel 304/316 (corrosion resistant), brass (drinking water system)
- Special working conditions :
- Plastic (PVC/PP) : Strong acid and alkali environment
- Hastelloy : high temperature and highly corrosive media (such as chemical pipelines)
- Ceramic coating : wear-resistant and erosion-resistant (slurry transportation)
- Water treatment system : prevent water backflow after pump shutdown
- Petrochemical : Isolate reactors and pipelines to avoid media mixing
- Heating, ventilation and air conditioning (HVAC) : Control the direction of hot and cold water circulation
- Energy industry : Preventing condensate backflow in steam systems
- Flow direction mark : Install strictly according to the direction of the arrow on the valve body
- Location selection : preferably near the pump outlet or the front end of key equipment
- Avoid water hammer : high pressure system needs to be equipped with slow closing check valve or accumulator
- Maintenance space : Reserve space for disassembly and maintenance (if the lifting type needs to be installed vertically)
Cause :
- Valve disc wear/foreign matter stuck
- Spring failure (spring assisted)
- Sealing surface corrosion or wrong installation direction
Solution :
- Clean the valve cavity and replace damaged parts (such as valve disc, sealing ring)
- Check spring tension and replace if necessary
- Use double disc design or metal hard seal to improve reliability
Core Standards :
- API 6D (Oil and Gas Pipeline Valves)
- ISO 5208 (leakage level test)
- ANSI/AWWA C508 (Check Valves for Water Supply Systems)
- Verification method : Require suppliers to provide pressure test reports , material certification (MTC) and third-party sealing test certificates
- Technical capabilities : whether customized designs are available (such as shockproof and moisture-proof structures)
- Industry experience : Are there any successful cases in the fields of municipal water supply, petrochemicals, etc.
- Production qualification : Passed ISO 9001, API certification and other quality management systems
- After-sales service: support on-site installation guidance and rapid fault response