Connect form: thread DN: 1/4~ 4 Suitable medium: water, oil, gas, nitric acid, acetate acid and so on Suitable temperature: -40~ + 200 be able to endure high pressure and dose not destroy valve. Seat: PTFE.material and good on-off feature. Working pressure:1000WOG On-off Number: 300~ 400. Thread standard: PT, NPT, BS21standard, surface is flat, allow overrun the range 0.5~ 0.8mm Main material: WCB, 304 and 316. Design and manufacture adoption: ISO, API, GB, BS, we are strict with the security and quality ,it was accepted by clients and sells to internal, external market.