Casting steel wafer check valve

Specifications:
1) Design standard: API 594
2) Inspection and test standard: API 598
3) Face-to-face: ANSI 594, DIN 2401
4) Connection: ANSI B16.5, DIN 2543-2548
4) Flange: ANSI B16.5, DIN 2543-2548
5) Size: 1 / 2"-24"
6) Class: 150lb – 900lb
7) Temperature: -28℃- 350℃
8) Body / bonnet: WCB / WC6 / WC9 / CF8 / CF8M / CF3 / CF3M
9) Trim: 13%Cr / STL
10) Sealing: flexible graphite, metal-to-metal
11) Type: HD, HR, PD, single disc, double-disc, spring-piston, left !