API Check Valve

Name: API Check Valve
Brand: THINKTANK

Description

What is API Check Valve

An API check valve is a type of check valve that complies with the standards set by the American Petroleum Institute (API), a trade association responsible for establishing guidelines and standards for the oil and gas industry. Check valves are used to allow fluid to flow in one direction while preventing backflow, and safeguarding pumps, compressors, and other equipment from potential damage.

API check valves are designed specifically for applications in the oil and gas sector and are subjected to rigorous testing and quality assurance processes to ensure they can withstand the harsh environments and demanding operating conditions typically found in this industry.

There are several types of check valves that can fall under the API classification, such as swing check valves, lift check valves, piston check valves, and ball check valves. Each type has a unique mechanism for controlling fluid flow and preventing backflow.

The API standards for check valves cover various aspects, including design, materials, manufacturing, testing, and documentation. These standards help ensure the valves’ compatibility, interchangeability, and reliable performance in their intended applications. API check valves are often specified by their API standards, such as API 6D or API 594, which dictate the specific requirements for different types of check valves.

Technical specifications

Type	Design and manufacturing	Face-to-face dimension	Flange size	Pressure- temperature	Test and inspection
Swing check valve	ANSI B16.34	ANSI B16.10	ANSIB16.15	ANSI B16.34	API598
Lift check valve	BS 1 868	ANSI B16.10	ANSIB16.15	ANSI B16.34	API598

Pressure rating PN(MPa)	Strength test		Water seal test		Air seal test
Pressure rating PN(MPa)	MPa	Lbf/in4	MPa	Lbf/ins	MPa	Lbf/in4
150	3	430	2.2	315	0.4~0.7	60-100
300	7.7	1110	5.7	815
600	15.3	2220	11.3	1630
900	23	3330	17	2445
1500	38.4	5560	28.2	4080
2500	64	9255	47	6790

Parts Material of the API Check Valve

Parts name	Material science	Working temperature
Valve nut	Carbon steel/stainless steel	-196℃~565℃
Gasket	Carbon steel/stainless steel
Rocker pin	Carbon steel/stainless steel
Seat	CS+SS/SS/SS+STL
Discs	CS+SS/SS/SS+STL

Parts name	WCB	LCB	WC6	WC9	Applicable medium
Inner bolt	A193GrB7/A194Gr2H	A320GrL7/A194Gr4	A193 GrB16/A194Gr4/7	A193GrB16/A194Gr4/7	Water, oil, gas Nitric acid, acetic acid
Middle flange bolt nut	A193 GrB7/A194Gr2H	A320 GrL7/A194Gr4	A193 GrB16/A194Gr4/7	A193GrB16/A194Gr4/7
Gasket	Spiral wound/soft iron	Spiral wound/soft iron	Spiral wound/SS304	Spiral wound/SS304
Bracket	A216GrWCB	A352 GrLCB	A217GrWC6	A217GrWC9
Rocker arm	A216GrWCB	A352 GrLCB	A217GrWC6	A217GrWC9
Valve cover	A216GrWCB	A352 GrLCB	A217GrWC6	A217GrWC9
Body	A216GrWCB	A352 GrLCB	A217GrWC6	A217GrWC9

Size Inch	DN	LRF	LBW	D	D1	b	Z-φd	A	B	H
150Lb
2	50	203	203	150	120.5	14	4-19	60	52	160
2l/2	65	216	216	180	139.5	16	4-19	75	63	180
3	80	241	241	190	152.5	17.5	4-19	91	78	190
4	100	292	292	230	190.5	22	8-19	117	102	205
5	125	330	330	255	216	22	8-22	144	128	230
6	150	356	356	280	241.5	24	8-22	172	154	258
8	200	495	495	345	298.5	27	8-22	223	203	295
10	250	622	622	405	362	28.6	12-25	278	255	355
12	300	699	699	485	432	30	12-25	329	305	395
14	350	787	787	535	476	33.4	12-29	362	337	445
16	400	864	864	595	540	35	16-29	413	387	490
18	450	978	978	635	578	38	16-32	464	438	520
20	500	978	978	700	635	41	20-32	516	489	545
24	600	1295	1295	815	749.5	46	20-35	619	591	880
300Lb
2	50	267	267	165	127	21	8-19	60	52	180
2l/2	65	292	292	190	149.4	24	8-22	75	63	190
3	80	318	318	210	168.1	27	8-22	91	78	215
4	100	356	356	255	200.2	30	8-22	117	102	242
5	125	400	400	280	235	33	8-22	144	128	268
6	150	444	444	320	269.7	35	12-22	172	154	305
8	200	533	533	380	330.2	40	12-25	223	203	368
10	250	622	622	445	387.4	46	16-29	278	255	395
12	300	711	711	520	450.9	49	16-32	329	305	445
14	350	38	838	585	514.5	52	20-32	362	337	470
16	400	846	846	650	571.5	56	20-35	413	387	530
18	450	978	978	710	628.5	59	24-35	464	438	585
20	500	1016	1016	775	686	62	24-35	516	489	610
24	600	1346	1346	915	813	68	24-41	619	591	750

Size Inch	DN	LBW	LRJ	D	D1	b	Z-φd	K	P	E	F	A	B	H
600Lb
2	50	292	295	165	127	26	8-1 9	108	82.55	7.92	11.91	60	49	205
21/2	65	330	333	190	149.5	29	8-22	127	101.6	7.92	11.91	75	59	230
3	80	356	359	210	168	32	8-22	146	123.83	7.92	11.91	91	74	235
4	100	432	435	275	216	39	8-25	175	149.23	7.92	11.91	117	97	286
5	125	508	511	330	266.5	45	8-29	210	180.98	7.92	11.91	144	122	295
6	150	559	562	355	292	48	12-29	241	211.12	7.92	11.91	172	146	330
8	200	660	663	420	349	56	12-32	302	269.88	7.92	11.91	223	194	381
10	250	787	791	510	432	64	16-35	356	323.85	7.92	11.91	278	243	458
12	300	838	841	560	489	67	20-35	413	381	7.92	11.91	329	298	581
14	350	889	892	605	527	70	20-38	457	419.1	7.92	11.91	362	330	635
16	400	991	994	685	603	76	20-41	508	469.9	7.92	11.91	413	373	585
900Lb
2	50	368	371	215	165.1	38	8-25	124	95.25	7.92	11.91	60	49	215
21/2	65	419	422	245	190.5	41	8-25	137	107.95	7.92	11.91	75	59	255
3	80	381	384	240	190.5	38	8-29	156	123.83	7.92	11.91	91	74	295
4	100	457	460	290	235	45	8-32	181	149.23	7.92	11.91	117	97	318
5	125	559	562	350	279.4	51	8-35	216	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	368
8	200	737	740	470	393.7	64	12-38	308	269.88	7.92	11.91	223	194	435
10	250	838	841	545	469.9	70	16-38	362	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	660
1500Lb
2	50	368	371	215	165.1	38	8-25	124	95.25	7.92	11.91	60	42	215
21/2	65	419	422	245	190.5	41	8-29	137	107.95	7.92	11.91	75	54	265
3	80	470	473	265	203.2	48	8-32	168	136.53	7.92	11.91	91	67	290
4	100	546	549	310	241.3	54	8-35	194	161.93	7.92	11.91	117	87	325
5	125	673	676	375	292.1	73	8-42	229	193.68	7.92	11.91	144	110	402
6	150	705	711	395	317.5	83	12-38	248	211.14	9.53	13.49	172	132	435
8	200	832	841	485	393.7	92	12-45	318	269.88	11.13	16.66	223	178	520