We can supply Inconel 900Lb check Valve. Our check valves are primarily designed fully opened or fully closed, with features of bolted bonnet, renewable seat or welded seat ring.

Standard specification.
Design and manufacture: BS 1868, API 6D, ASME B16.34
Stainless steel check valve: API 603;
Inspection and Test: API 598.
End flange dimension: ASME B 16.5 ( for NPS≤24);
ASME B 16.47 series B, API605 or ASME B 16.47 series A, MSS SP-44(for NPS＞24).
BW end dimension: ASME B 16.25.
Socket-weld dimension: ASME B 16.11.
Face to face and end to end:ASME B 16.10.
Pressure-temperature ratings:ASME B 16.34.

Performance Specification For check valve

Technical Specification		ANSI Class (Lbs)
		150	300	400	600	900	1500	2500
Test Pressure (MPA)	Shell Test	2.94	7.67	10.2	15.3	22.98	38.3	63.83
	Seal Test	2.16	5.62	7.48	11.23	16.85	28.08	46.81
	Air Test	0.55+/-0.07

Applicable temperature: -196 C degree to 600 C degree
Note: please choose different materials for different working conditions.
Application: Common type: water, steam, oil, liquid gas, natural gas etc
Anti-sulphur type: gas oil etc which contains h2s, co composition.

As usual, class 150 to class 900 check valves are usually used to bolted cover, class 1500 to class 2500 check valves are usually used pressure seal cover design.

Besides the general check valves, our company also can make cryogenic check valve.

Body: Inconel
Bonnet: Inconel
Gasket: PTFE
Disc: Inconel, Inconel+STL
Seat: Inconel, Inconel+STL
Bolts and nuts: A193 B8/A194 8, A193 B8M/A194 B8

Also we can make the different trim material according to API trim chart, likely monel, hastelloy C, inconel, alloy 20 and so on.