The DFT® Model PDC® Silent Check Valve is specially designed for use on the discharge side of reciprocating air or gas compressors. It includes a pulse damping chamber to maintain the disc in the open position during the momentary reductions in flow associated with each cycle of a reciprocating compressor and to protect against premature seat wear.
Standard Features:
| Items |
 312H1A4A3 A216 WCB 2" 316 SS Class 150 RF PDC® Flanged Check Valve |
312H1B4A3 A216 WCB 2" 316 SS Class 300 RF PDC® Flanged Check Valve |
312H1C4A3 A216 WCB 2" 316 SS Class 600 RF PDC® Flanged Check Valve |
312H1D4A3 A216 WCB 2" 316 SS Class 900 RF PDC® Flanged Check Valve |
312H1E4A3 A216 WCB 2" 316 SS Class 1500 RF PDC® Flanged Check Valve |
|||||
| Series | PDC® | |||||||||
| Size | 2.00 in | |||||||||
| Cold Working Pressure | 285 psig | 740 psig | 1480 psig | 2220 psig | 3705 psig | |||||
| Working Steam Pressure | 185 psig | 620 psig | 1235 psig | 1855 psig | 3090 psig | |||||
| ASME CLASS | 150 | 300 | 600 | 900 | 1500 | |||||
| Dimension A | 8 in | 10.5 in | 11.5 in | 14.5 in | 14.5 in | |||||
| Dimension B | 6 in | 6.5 in | 6.5 in | 8.5 in | 8.5 in | |||||
| Weight | 20 lb | 27 lb | 30 lb | 65 lb | 65 lb | |||||
| Cracking Pressure CP | 0.41 psig0.028 bar | 0.49 psig0.034 bar | 0.41 psig0.028 bar | 0.35 psig0.024 bar | 0.35 psig0.024 bar | |||||
| Body | A216 Grade WCB | |||||||||
| Body Material | Carbon Steel | |||||||||
| Trim Material | 316 SS | |||||||||
| Seat1 | 316 SS | |||||||||
| Spring2 | 316 SS | |||||||||
| Spring for Ball check | Inconel® X-750 | |||||||||
| Bushing | Rulon® | |||||||||
| Seal Ring | Teflon®/Hastelloy® C276 | |||||||||
| Spring Retainer - Ball Check | A479 316 | |||||||||
| Guide Ring | Teflon | |||||||||
| Ball Check | 440C SS | |||||||||
| Orifice Plug | A479 316 | |||||||||
| Body Seal3 | Durlon 9000 | Durlon 9000 | 316 SS / Flexible Graphite | Spiral Wound Graphite | 316 SS / Flexible Graphite | |||||
| Available Soft Seat Materials4 | Buna-N (-70 to 250ºF) EPDM (-75 to 300ºF) TFE®-Viton® (-40 to 400ºF) Viton® (-40 to 400ºF) Zelon® (37 to 470ºF) | |||||||||
| Disc/Stem Assembly | 316 SS | |||||||||
| ENDS | Flanged (RF) | |||||||||
| ANSI | B16.10 B16.20 B16.34 B16.5 | |||||||||
| MSS | SP-126 SP-25 SP-6 SP-61 | |||||||||
| ASTM | A216GR WCB A351GR CF8M | A216GR WCB A351GR CF8M CRN NACE | A216GR WCB A351GR CF8M CRN NACE | A216GR WCB A351GR CF8M CRN NACE | A216GR WCB A351GR CF8M CRN NACE | |||||
| Other | API 6D API PED | |||||||||
| Cv | 62 | 62 | 62 | 55 | 55 | |||||
| Temperature Rating | -20 to 450 ºF-28.89 to 232.22 ºC | |||||||||
| Applications | Compressor Discharge Metering Pumps Process Lines Pump Discharge Refrigeration | |||||||||
| Hardware | Stainless Steel | |||||||||
| Note |
|
|||||||||
|
||||||||||
