900LB API Swing Check Valve

900LB API swing check valve is engineered to API 6D standards with a pressure seal bonnet and heavy-duty forged or cast steel body, purpose-built for extreme ultra-high pressure operating conditions up to 2220 psi. Featuring a reinforced swing disc mechanism with precision-machined seating surfaces, this valve delivers dependable backflow prevention and exceptional structural integrity in the most demanding critical service applications.

Overview

Application : Exclusively specified for ultra-high pressure oil & gas gathering systems, refinery hydroprocessing units, and high-pressure injection pipelines where operating pressures far exceed Class 600 valve capabilities. Also deployed in power plant supercritical steam systems, offshore platform high-pressure manifolds, and industrial process piping requiring absolute reliability under extreme pressure and temperature conditions.

Material Specification:

Part Name	Material	Working Temperature
Valve nut	Carbon steel / Stainless steel	-196°C ~ 565°C
Shim	Carbon steel / Stainless steel
Rocker pin	Carbon steel / Stainless steel
Seal	CS+SS / SS / SS+STL (see body materials)
Discs	CS+SS / SS / SS+STL (see body materials)

Part Name	WCB	LCB	WC6	WC9	Applicable Medium
Inner six angle bolt	A193 Gr B7/A194 Gr 2H	A320 Gr L7/A194 Gr 4	A193 Gr B16/A194 Gr 4/7	A193 Gr B16/A194 Gr 4/7	Water, oil, gas, nitric acid, acetic acid
Middle flange bolt nut	A193 Gr B7/A194 Gr 2H	A320 Gr L7/A194 Gr 4	A193 Gr B16/A194 Gr 4/7	A193 Gr B16/A194 Gr 4/7
Shim	Spiral wound/soft iron	Spiral wound/soft iron	Spiral wound/SS304	Spiral wound/SS304
Bracket	A216 Gr WCB	A352 Gr LCB	A217 Gr WC6	A217 Gr WC9
Rocker arm	A216 Gr WCB	A352 Gr LCB	A217 Gr WC6	A217 Gr WC9
Valve cover	A216 Gr WCB	A352 Gr LCB	A217 Gr WC6	A217 Gr WC9
Body	A216 Gr WCB	A352 Gr LCB	A217 Gr WC6	A217 Gr WC9

Performance Specification:

Pressure Rating PN (MPa)	Strength Test		Water Seal Test		Air Tight Test
Pressure Rating PN (MPa)	MPa	Lbf/in²	MPa	Lbf/in²	MPa	Lbf/in²
900	23.0	3330	17.0	2445	0.4–0.7	60–100

Drawing:

Dimensions:

in	DN	LBW	LRJ	D	D1	b	Z-Φd	K	P	E	F	A	B	H
2	50	368	371	215	165.1	38	8-22	124	95.25	7.92	11.91	60	49	215
2½	65	419	422	245	190.5	41	8-29	137	107.95	7.92	11.91	75	59	255
3	80	457	460	290	235.0	45	8-32	156	123.83	7.92	11.91	91	74	295
4	100	533	536	305	241.3	51	8-29	210	180.98	7.92	11.91	144	122	345
6	150	610	613	380	317.5	56	12-32	241	211.12	7.92	11.91	172	146	388
8	200	737	740	470	393.7	64	12-36	302	269.88	7.92	11.91	223	194	435
10	250	838	841	545	469.9	70	16-36	356	323.85	7.92	11.91	278	243	545
12	300	965	968	610	533.5	79	20-39	419	381	7.92	11.91	329	298	680