Check Valve Materials

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CHECK VALVE MATERIALS

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STANDARD MATERIALS
EXCALIBUR^®, GLC^®, WLC^® CHECK VALVES
Component		Carbon Steel Body	Stainless Steel Body
Body		A216 Grade WCB	A351 CF8M
Disc/stem assembly		A351 CF8M/A479 316	A351 CF8M/A479 316
Seat (1)		A351 CF8M	A351 CF8M
Spring (2)		A313 316	A313 316
Bushing		A479 316	A479 316
Bolting (3)		A193-B7 (Stud) & A194-2H (Nut)
Gasketing (3)	Cl.150 & 300	CFG (4)
	Cl.600+	316 Spiral wound with Flexible Graphite Filler
1” & 1-1/2” WLC; Cl 150 to 1500 - 316 SS trim except 17-7 disk in Cl 900+. Some valves contain body seals (“O” ring or gasket). Consult DFT for material selection. Notes*: 1. Soft seats are available for bubble-tight shutoff.
2. Inconel^® X-750 spring is available.
3. Excalibur only. Contact DFT for stainless steel or other bolting materials.
4. Corrugated flexible graphite material.

PDC^® CHECK VALVES
Component		Carbon Steel Body	Stainless Steel Body
Body		A216 Grade WCB	A351 CF8M
Disc		A351 CF8M	A351 CF8M
Seat (5)		A351 CF8M	A351 CF8M
Spring (6)		A313 316 (450 ^°F max.)	A313 316 (450 ^°F max.)
Spring for ball check		Inconel X-750	Inconel X-750
Disc guide		A479 316	A479 316
Bushing		Rulon^® (7)	Rulon^® (7)
Seal ring		Teflon^®/Hastelloy^® C276(7)	Teflon^®/Hastelloy^® C276(7)
Spring retainer - ball check		A479 316	A479 316
Guide Ring		Teflon^®(7)	Teflon^®(7)
Ball check		Teflon^®(7)	Teflon^®(7)
Orifice plug		A479 316	A479 316
PDC^® temperature rating is limited by the body seal material, spring material and nonmetallic components. Notes: 5. Soft seats are available for bubble-tight shutoff.
6. Inconel X-750 spring is available.
7. 500 °F maximum.

GLC^®, WLC^® CHECK VALVES
Component		Cast Iron Body /Bronze Trim	Cast Iron Body /316 Trim (8)
Body		A126 Class B Cast Iron	A126 Class B Cast Iron
Disc/stem assembly		B584 836 - Bronze	A351 CF8M
Seat (9)		B584 836 - Bronze	A351 CF8M
Spring		A313 T302	A351 CF8M
Bushing		B584 836 - Bronze	A351 CF8M
Notes: 8. 316 stainless steel trim recommended for temperatures from 180 ^°F to 200 ^°F.
9. Buna-N soft seat available for bubble-tight shutoff.