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Description
The 3121 DN20 is a check valve designed to prevent reverse flow of liquids or gases in pipeline systems. It allows flow in only one direction and automatically closes when back pressure occurs, protecting pumps and equipment.
It is widely used in water supply systems, heating systems, gas lines, and industrial pipelines.
Technical Specifications:
• Model: 3121
• DN: 20 mm
• Type: check valve (non-return valve)
• Working medium: water, air, gas, technical fluids
• Working pressure: up to 1.6 MPa
• Temperature range: 0°C to +90°C
• Connection type: threaded
• Material: brass / steel (depending on version)
• Opening pressure: low (spring-loaded mechanism)
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