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Non-return valves for pressure circuits

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article image SMC's Series AKH/AKB non-return valves.

SMC Pneumatics has released details of the Series AKH/AKB non-return valves for use in all compressed air and vacuum circuits.

Models in the series are constructed in three configurations:

· AKH 'straight', comprising a lightweight resin body incorporating SMC's 'one-touch' push-in tube connectors on both inflow and outflow ports.

· AKH 'half-union', comprising a metal body, a one-touch fitting and a male threaded connector.

· AKB 'bush' style, comprising a metal body with male and female threaded connectors.

Half-union and bush models can be supplied with the check valve on either the inflow or outflow side. Metal-bodied models are particularly suited to operating environments subject to welding spatter such as automotive assembly applications.

Additionally, internal springs on all models are constructed of stainless steel to ensure resistance to corrosion from moisture in the airflow.

AKH/AKB valves operate at pressures ranging from -100kPa to 1MPa and offer a uniquely low check valve 'crack' pressure of 5kPa compared with a crack pressure of up to 100kPa for conventional non-return valves.

The valves offer an effective orifice area of between 2.8mm2and 34mm2. They are available in a wide range of sizes with metric or imperial port connections from M5 and 1/8" to 1/2" for threaded connections and 4mm to 12mm for one-touch connections.

They can be piped with standard nylon or polyurethane tubing in both pressure and vacuum applications. SMC Pneumatics 02 9354 8222.

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