ASME Check Valve

Administer Standard

Design and Manufacture	Face to Face / End to End	Flange Dimension	Pressure Temperature Rating	Inspection and Test
API 6D / BS 1868	ASME B16.10	ASME B16.5	ASME B16.34	API 598 / API 6D

Pressure Test

(MPa)

Nominal Pressure (Class)	Shell Test (MPa)	Shell Test (psi)	Water Seal Test (MPa)	Water Seal Test (psi)	Air Seal Test (MPa)	Air Seal Test (psi)
150	3.0	430	2.2	315	0.4–0.7	60–100
300	7.7	1110	5.7	815	0.4–0.7	60–100
600	15.3	2220	11.3	1630	0.4–0.7	60–100
900	23.0	3330	17.0	2445	0.4–0.7	60–100
1500	38.4	5560	28.2	4080	0.4–0.7	60–100
2500	64.0	9255	47.0	6790	0.4–0.7	60–100

Main Part Materials and Property

Body / Cover / Disc	Hinge Pin Boss	Sealing Shim	Sealing Face	Working Temperature (°C)	Suitable Medium
WCB	F6a	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤425	Water, Steam, Petroleum Products
WC1	F304	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤450	Water, Steam, Petroleum Products
WC6	F304	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤540	Water, Steam, Petroleum Products
WC9	F304	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤570	Water, Steam, Petroleum Products
C5 / C12	F304	Enhanced Flexible Graphite	13Cr / STL / Body Material / PTFE / Nylon	≤550	Water, Steam, Petroleum Products
CF8	304	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤200	Nitric Acid
CF8M	316	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤200	Acetic Acid
CF3	304L	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤200	Strong Oxidizing Medium, Urea
CF3M	316L	Flexible Graphite / Stainless Steel / Acid-proof Asbestos Gasket / PTFE	13Cr / STL / Body Material / PTFE / Nylon	≤200	Strong Oxidizing Medium, Urea

Swing ASME Check valve

ASME Check Valve

Main Size of Outside & Weight

NPS	DN	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)
		Class 150						Class 300
2	50	203	216	203	51	132	15	267	283	267	51	144	20
2½	65	216	229	216	64	147	20	292	308	292	64	169	35
3	80	241	254	241	76	176	27	318	333	318	76	210	40
4	100	292	305	292	102	198	45	356	371	356	102	260	61
5	125	330	343	330	127	255	58	400	416	400	127	295	80
6	150	356	368	356	152	320	69	445	460	445	152	326	130
8	200	495	508	495	203	380	131	533	549	533	203	380	190
10	250	622	635	622	254	440	219	622	638	622	254	440	296
12	300	699	711	699	305	480	321	711	727	711	305	520	450
14	350	787	800	787	337	530	380	838	854	838	337	540	640
16	400	864	876	864	387	580	560	864	879	864	387	588	850
18	450	978	991	978	438	618	630	978	994	978	438	670	1030
20	500	978	991	978	489	657	770	1016	1035	1016	489	720	1330
24	600	1295	1308	1295	591	760	960	1346	1368	1346	591	850	1950
26	650	1295	-	1295	633	840	1250	1346	1372	1346	633	920	2300
28	700	1448	-	1448	684	920	1580	1499	1524	1499	684	1150	2600
30	750	1524	-	1524	735	980	1950	1594	1619	1594	735	1260	3200

ASME Check Valve

Class 600 & Class 900

NPS	DN	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)
		Class 600						Class 900
2	50	292	295	292	51	170	28	368	371	368	51	200	48
2½	65	330	333	330	64	178	40	419	422	419	64	220	75
3	80	356	359	356	76	246	68	381	384	381	76	280	95
4	100	432	435	432	102	290	117	457	460	457	102	320	135
5	125	508	511	508	127	320	155	559	562	559	127	360	200
6	150	559	562	559	152	360	192	610	613	610	152	400	264
8	200	660	664	660	203	430	340	737	740	737	203	480	424
10	250	787	791	787	254	502	515	838	841	838	254	560	730
12	300	838	841	838	305	554	750	965	968	965	305	632	1070
14	350	889	892	889	337	595	890	1029	1038	1029	322	680	1180
16	400	991	994	991	387	680	1303	1130	1140	1130	373	780	1790
18	450	1092	1095	1092	438	778	1800	1219	1232	1219	423	880	2500
20	500	1194	1200	1194	489	970	2150	1321	1334	1321	471	1050	3080
24	600	1397	1407	1397	591	1100	3200	1549	1568	1549	522	1200	4600

Class 1500 & Class 2500

NPS	DN	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)
		Class 1500						Class 2500
2	50	368	371	368	51	210	48	451	454	451	42	230	68
2½	65	419	422	419	64	240	75	508	514	508	52	260	100
3	80	470	473	470	76	303	120	578	584	578	62	330	165
4	100	546	549	546	102	340	180	673	683	673	87	370	260
5	125	673	676	673	127	380	294	794	807	794	96	410	440
6	150	705	711	705	144	430	385	914	927	914	131	460	580
8	200	832	841	832	192	500	634	1022	1038	1022	179	530	970
10	250	991	1000	991	239	590	1140	1270	1292	1270	223	620	1700
12	300	1130	1146	1130	287	660	1650	1422	1445	1422	265	690	2600
14	350	1257	1276	1257	315	710	2000	-	-	-	-	-	-
16	400	1384	1407	1384	360	820	2700	-	-	-	-	-	-

Lift ASME Check valve

ASME Check Valve

Main Size of Outside & Weight

Class 150 & Class 300

NPS	DN	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)
		Class 150						Class 300
1/2	15	108	119	108	13	76	3	152	162	152	13	78	5
3/4	20	117	130	117	19	76	4	178	191	178	19	82	6
1	25	127	140	127	25	98	5	203	216	203	25	102	8
1¼	32	140	153	140	32	102	7	216	229	216	32	106	11
1½	40	165	178	165	38	115	8	229	242	229	38	118	13
2	50	203	216	203	51	140	15	267	283	267	51	140	26
2½	65	216	229	216	64	162	22	292	308	292	64	164	33
3	80	241	254	241	76	168	28	318	333	318	76	178	50
4	100	292	305	292	102	194	42	356	371	356	102	195	86
5	125	356	368	356	127	210	60	400	416	400	127	223	120
6	150	406	419	406	152	226	75	445	460	445	152	245	180
8	200	495	508	495	203	250	118	533	549	533	203	280	220
10	250	622	635	622	254	275	194	622	638	622	254	336	310
12	300	699	711	699	305	332	320	711	727	711	305	380	510

Class 600 & Class 900

NPS	DN	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)	L (RF)	L (RTJ)	L (BW)	d	H	Weight (kg)
		Class 600						Class 900
2	50	292	295	292	51	152	32	368	371	368	50	180	50
2½	65	330	333	330	64	167	45	419	422	419	64	200	65
3	80	356	359	356	76	178	68	381	384	381	74	235	88
4	100	432	435	432	102	215	98	457	460	457	100	270	140
5	125	508	511	508	125	240	155	559	562	559	125	300	210
6	150	559	562	559	152	279	230	610	613	610	150	350	300
8	200	660	664	660	200	328	300	737	740	737	200	400	390

Manufacturing Process

Step 1: Order and Design

According to customer requirements, pressure class, size, material, and applicable standards are confirmed first. The engineering team then prepares drawings and technical specifications for the asme check valve, ensuring the design meets ASME and project requirements.

ASME Check Valve

Step 2: Forging & Casting

The main pressure-bearing parts such as body, bonnet, and disc are produced by forging or casting based on the valve type and material grade. For an asme check valve, all raw materials must comply with relevant material standards and undergo initial inspection before further processing.

ASME Check Valve

Step 3: Machining

After casting or forging, the components are machined by CNC and conventional machines. Critical dimensions such as flange faces, seat pocket, bore, and sealing surfaces of the asme check valve are precisely processed to ensure proper fit-up and sealing performance.

ASME Check Valve

Step 4: Assembly

All finished parts are cleaned and assembled according to the approved procedure. Internal components such as disc, hinge pin, seat, gasket, and bonnet are installed carefully to make sure the asme check valve operates smoothly and reliably.

ASME Check Valve

Step 5: Testing & Quality Assurance

Each valve is subjected to dimensional inspection, pressure testing, and sealing performance testing in accordance with ASME/API requirements. For every asme check valve, hydrostatic shell test and seat leakage test are carried out to guarantee safety and quality.

ASME Check Valve

Step 6: Painting and Finishing

After testing, the valve surface is cleaned, painted, marked, and packed. Final finishing includes nameplate checking, protective end covers, and export-ready packaging before shipment.

ASME Check Valve

Applications

Keep the water flowing in the correct direction at the pump outlet. Centrifugal pumps are one of the commonly used types of water pumps, but they are not self-priming pumps (they cannot discharge air from the pipe before operation), so the check valve can maintain the water flow until the air in the pump separates from the incoming water and is discharged.

Used in heating, ventilation and air conditioning (HVAC) systems, especially in larger buildings. These systems may need to pump coolant to multiple floors, and the check valve plays an important role in resisting the force of gravity, ensuring that the coolant does not flow back.

Used to protect drinking water from exposure to other types of water, or to prevent the backflow of potentially contaminated water.

These valves are widely used in:

Oil and Gas

Chemical Processing

Power Plants

Water Treatment

Metallurgy and Mining

Agriculture and Irrigation

Factory Environment

Factory Production Line

Material Storage

Quality Control

Assembly Workshop

Quality Control

Assembly Workshop

Why Choose Us

Superior Quality

Our valves are manufactured using premium materials and undergo rigorous quality testing to ensure reliable performance in demanding industrial applications.

Advanced Technology

Equipped with state-of-the-art CNC machining centers and precision manufacturing equipment, we deliver valves with exceptional accuracy and consistency.

Competitive Pricing

Through optimized manufacturing processes and bulk material procurement, we offer high-quality valves at competitive prices without compromising on quality.

Expert Support

Our experienced technical team provides comprehensive support from product selection to after-sales service, ensuring optimal valve performance for your specific application.

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