1) Size: 1" - 20"
2) Class: 150lbs - 900lbs

Technical standards:
1) Design and manufacture: API 6D
2) Face-to-face: ANSI B16.10
3) Flange end: ANSI B16.5
4) Inspection and test: API 598

Main materials:
1) Body and bonnet: CS / SS - CB, WCA, WCC, A351, 304, 340L,
316, 316L, 17-4pH
2) Disc: CS / SS - WCB, WCA, WCC, A351, 304, 340L, 316, 316L1, 7-4pH
3) Card wreath: SS-304, 340L, 316, 316L17-4pH
4) Spring: Stainless steel (SS)