Wafer Check Valve Series: 1. Size: 1/4"--4"(DN8--DN100) 2. Material: SS201, SS304(CF8), SS316(CF8M). 3. Nominal pressure: 1000psi/PN63. 4. Suitable temperature: -40--300 centigrade degree. 5. End connection: F/F thread. 6. Thread: DIN, BSP(BSPT, BSPP), NPT, etc. 7. Casting: Investment