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- Name: Non-Return Valve One-Way Valve Check Valve
- Model Size: Various styles and sizes available, see description for details
- Function: Connect to a hose to prevent gas or liquid from flowing back.
- Confirmation method: If you can not identify, you can mouth test blowing, blowing out the gas can be confirmed in and out.
- Model features: pressureless and with pressure type, ozone-resistant and oil-resistant function; see the description for details, according to individual needs to buy.
- Product characteristics: good thermal performance, chemical stability, non-toxic and odourless

1. Pressureless type Check Valve Pressure range: 
- Opening pressure approx: 0.003MPa (0.03kg water pressure) 
- Reverse pressure approx: 0.7MPa (7kg water pressure)

2. Pressure type Check Valve Pressure range: 
- Opening pressure approx.: 0.015MPa (0.15kg water pressure) 
- Reverse counterpressure approx.: 1.0MPa (10kg water pressure)