FORGED STEEL VALVES

Forged steel check valves

Name: Forged steel check valves
Brand: NTK

Explore bolted / welded and pressure-seal designs, with construction, ends and pressure class reviewed for the duty.

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Configurations & sizes

Sizes are organized from the company’s historical catalogues for preliminary selection. Current availability, pressure–temperature limits, materials and dimensions are subject to approved data sheets and drawings. Conv., Full and Std. retain the catalogue’s separate port-column labels; the end sizes are not interchangeable.

Forged Steel Swing Check Valves

Bolted or welded cover · Swing type disc · Threaded or socket-weld ends · Rolled seat ring

Pressure class	Port designation	NPS (in)	Reference
Class 800	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 11, 12
Class 900	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 11, 12
Class 1500	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 11, 12

View material example

Body: ASTM A105N
Seat: ASTM A276 420
Disc: ASTM A276 420
Cover: ASTM A105N

Forged Steel Piston Check Valves

Bolted or welded cover · Piston type, spring-loaded · Threaded or socket-weld ends · Integral hard-faced seat

Pressure class	Port designation	NPS (in)	Reference
Class 800	Conv.	3/8 · 1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 11, 12
Class 800	Std.	3/8 · 1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 11, 12

View material example

Body: ASTM A105N + 13Cr
Disc: ASTM A276 420
Cover: ASTM A105N

Forged Steel Pressure Seal Piston Check Valves

Pressure seal cover · Piston type disc · Socket-weld or butt-weld ends · Integral hard-faced seat

Pressure class	Port designation	NPS (in)	Reference
Class 900	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 13, 14
Class 1500	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 13, 14
Class 2500	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 13, 14

View material example

Body: ASTM A105N + 13Cr
Disc: ASTM A276 420
Cover: ASTM A182 F6a
Pressure seal ring: Soft iron

Forged Steel Y-Pattern Piston Check Valves

Y-pattern · Bolted or welded cover · Threaded or socket-weld ends · Piston type disc

Pressure class	Port designation	NPS (in)	Reference
Class 800	Conv.	3/8 · 1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 15, 16
Class 800	Full	3/8 · 1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 15, 16

View material example

Body: ASTM A105N + 13Cr
Disc: ASTM A276 420
Cover: ASTM A105N

Flange Ends Check Valves

Bolted cover · Piston type, spring-loaded · Flanged or butt-weld ends · Integral hard-faced seat

Pressure class	Port designation	NPS (in)	Reference
Class 150	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 21, 22
Class 300	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 21, 22
Class 600	Conv.	1/2 · 3/4 · 1 · 1-1/4 · 1-1/2 · 2	Catalogue pp. 21, 22

View material example

Body: ASTM A105N + 13Cr
Disc: ASTM A276 420
Cover: ASTM A105N

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