Pressure: Max 10 bar       Temperature: 0°C til +60°C       Dimensions: Ø4 to Ø12, M5 to 1/2"       Threading: Tapered acc. to ISO 7,1.1, BS 21 and DIN 2999 Cyl. acc. to ISO 228 Class A       ROHS: Approved      

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A check valve operates in a way so that air may flow freely in one direction but will be blocked in the opposite direction. Due to the uni-directional mode of operation it is important to use the right version, so check the direction of flow in the pictures. Usable down to very low counter pressure. Notice that these valves always come pre-fitted with an O-ring on male BSPP thread.