API Valve >> API Check Valve Quoting Standards Bolted Cover Flanged or Butt-welding ends Manufacture in accordance with API 6D Face to face/End to end dimensions to ANSI B 16.10 Flange dimensions to ANSI B 16.5 Butt-welding end dimensions to ANSI B 16.25 Valve tested to API 6D Product Main Usage API Check Valve is suitable to Class150～600Lb and Working Temperature -29℃ to 550℃ in Oil, Chemical Industry, producing medicine, fertilizer and Electric Industry. Its suitable is water, oil, steam, acid media etc. Product Construction 1.Design conforms to GB12236, reasonable construction, reasonable seal, perfect performance. 2.Disc and seat sealing face are made of iron alloy or stellite, over-laid and hard faced wearble, high-temperature proof, rust-proof, scratch-proof, long time service. 3.Suitable for all kinds of flange and flange face, meet all kinds of requirement of project and client. 4.Large scale of body material for selection, gasket is adoptable according to actual situation or clients'' requirement, applicable for all kinds of pressure rating, temperature and media. 5.Disc go arocced the pin, minimum the inpact of closure. 6.Connect of pin and disc is inside constructed,non-leakage,reliable application. Material of main parts Shell ASTM A216 WCB ASTM A351 CF8 Disc & Arm WCB CF8 CF8M Monel Arm Pin F6a F304 F316 Monel F304 Disc facing 13Cr 13Cr STL 304 STL 316 STL Monel 304 304 STL Seat facing 13Cr STL STL 304 STL 316 STL Monel 304 304 STL Shell ASTM A351 CF3 ASTM A351 CF8M ASTM A351 CF3M Disc & Arm Arm Pin F304L F316 F316L Disc facing 304L 304L STL 316 316 STL 316L 316L STL Seat facing 304L STL STL 316 STL STL 316L 316L STL