Single Door Check Valve

Single door check valve is a kind of opening and closing parts for the round valve and rely on their own weight and media pressure to produce action to block the medium backflow of a valve. It belongs to the automatic valve category, also known as check valve, check valve or backflow valve. These valves through a single valve to control the unidirectional flow of fluid, when the medium is flowing in the right direction, the valve flap is open; and when the medium flows backwards, the valve flap is closed to prevent the medium from flowing backwards!

single door check valve Description

Single door check valve (also known as single flap check valve) is a kind of valve to achieve one-way flow control through a single circular or disc-shaped flap, relying on the medium's own pressure or flap gravity to achieve automatic opening and closing, is mainly used to prevent backflow of fluids in the pipeline, to protect pumps, compressors, and other equipment safety. Its name comes from a single valve structure design, belongs to one of the basic types of check valves.

F‌eatures	instructions‌
simple structure‌	Fewer parts, smaller size, lower manufacturing cost
low flow resistance‌	Flap aligned with flow path at full opening, low pressure drop
‌limitations‌	Dependent on the medium pressure sealing, high differential pressure scenarios prone to leakage

single door check valve specification

1. Working pressure: 1.0Mpa/1.6Mpa/2.5Mpa

2. Working temperature: NBR: 0℃～+80℃ EPDM: -10℃～+120℃ VITON: -20℃～+180℃

3. Face to face according to ANSI 125/150

4. Flange according to EN1092-2, ANSI 125/150 etc.

5. Testing: DIN3230, API598 6. Medium: Fresh Water, Sea water, food stuff, all kinds of oil, acid, alkaline liquid etc.

single door check valve

Applications
Water supply system: installed at the outlet of water pump to prevent water backflow from impacting the impeller when the pump is stopped;
HVAC engineering: used in air-conditioning circulating pipeline to avoid refrigerant backflow leading to efficiency loss;
Industrial pipelines: to protect equipment containing corrosive media from backflow contamination

Suggestions for selection
Applicable scenes:
Low and medium pressure (≤ PN40) and clean medium piping system;
Need to quickly block the backflow but the sealing requirements are not demanding occasions.
Seal upgrade:
Elastic seal: suitable for low temperature, non-abrasive media;
Metal seal: high temperature (≤ 200 ℃) or particulate matter containing conditions

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