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API check valve

Product Overview

API check valve is applicable to the pipeline of petroleum, chemical, pharmaceutical, chemical fertilizer, electric power industry and other working conditions with pressure class of 150 ~ 2500lb and working temperature of - 46'c-570 ℃ to prevent the backflow of medium.

Structural characteristics

1. The product structure is reasonable, the seal is reliable, the performance is fine, the shape is beautiful;
2. The sealing surface is overlaid with Co based cemented carbide, which has good wear resistance, corrosion resistance, scratch resistance and long service life;
3. Built in pin shaft structure reduces leakage and is reliable to use;
4. When the pressure is class1500lb, the self tightening seal is used in the middle chamber of the valve. The higher the medium pressure is, the better the sealing performance is;
5. The material and size of flange and butt welding end can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs.

Execution standard

Design specification :API6D, BS1868
Structure length: ASME B16.10
Connection flange: ASME B16.5
Test and Inspection: API598
Pressure-temperature: ASME B16.34

Performance parameter

Nominal size: NPS 2"~30"
Pressure range: 150~2500Lb
Operating temperature: ≤600℃
Main material: WCB, WC1, WC6, WC9, etc
Suitable medium: water, steam, oil, nitric acid, acetic acid, strong oxidation, medium, urea

Product Dimensions

Class150						Class300
NPS(in)	L			d	H	WT (kg)	L			d	H	WT (kg)
NPS(in)	RF	RTJ	BW	d	H	WT (kg)	RF	RTJ	BW	d	H	WT (kg)
2	203	216	203	51	132	15	267	283	267	51	144	20
21/2	216	229	216	64	147	20	292	308	292	64	169	35
3	241	254	241	76	176	27	318	333	318	76	210	40
4	292	305	292	102	198	45	356	371	356	102	260	61
5	330	343	330	127	255	58	400	416	400	127	295	80
6	356	368	356	152	320	69	445	460	445	152	326	130
8	495	508	495	203	380	131	533	549	533	203	380	190
10	622	635	622	254	440	219	622	638	622	254	440	296
12	699	711	698	305	480	321	711	727	711	305	520	450
14	787	800	787	337	530	380	838	854	838	337	540	640
16	864	876	864	387	580	560	864	879	864	387	588	850
18	978	991	978	438	618	630	978	994	978	438	670	1030
20	978	991	978	489	657	770	1016	1035	1016	489	720	1330
24	1295	1308	1295	591	760	960	1346	1368	1346	591	850	1950
26	1295	-	1295	633	840	1250	1346	1372	1346	633	920	2300
28	1448	-	1448	684	920	1580	1499	1524	1499	684	1150	2600
30	1524	-	1524	735	980	1950	1594	1619	1594	735	1260	3200

	Class600						Class900
NPS(in)	L			d	H	WT (kg)	L			d	H	WT (kg)
NPS(in)	RF	RTJ	BW	d	H	WT (kg)	RF	RTJ	BW	d	H	WT (kg)
2	292	295	292	51	170	28	368	371	368	47	200	4S
21/2	330	333	330	64	178	40	419	422	419	57	220	75
3	356	359	356	76	246	68	381	384	381	73	280	95
4	432	435	432	102	290	117	457	460	457	98	320	135
5	508	511	508	127	320	155	559	562	559	121	360	200
6	~559~	562	559	152	360	192	610	613	610	146	400	264
8	660	664	660	200	430	340	737	740	737	190	480	424
10	787	791	787	248	502	515	838	841	838	234	560	730
12	838	841	838	298	554	750	965	968	965	282	632	1070
14	889	892	889	327	595	890	1029	1038	1029	311	630	180
16	991	994	991	375	680	1303	1130	1140	1130	354	780	1790
18	1092	1095	1092	419	778	1800	1219	1232	1219	400	880	2500
20	1194	1200	1194	464	970	2150	1321	1334	1321	444	1050	3080
24	1397	1407	1397	559	1100	3200	1549	1568	1549	533	1200	4600

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