Swing check valve is a kind of automatic valve, which can prevent flow reversed in the pipeline. It is designed to prevent the medium in the pipeline from flowing back, as the pressure drops to zero, the valve shuts fully to prevent backflow. A swing check valve operation depends on gravity and reverse flow. A hinged disc will be opened or closed automatically depending on the flow pressure. Swing check valve is mounted with a disc that swings on a hinge or shaft. The disc swings off the seat to allow forward flow and when the flow is stopped, the disc swings back onto the seat to block reverse flow. The weight of the disc and the return flow has an impact on the shut-off characteristics of the valve. These valves are mainly used in unidirectional pipeline which only allow the fluid to flow in one direction to prevent any accident happened.

 

 

The swing check valves are mainly used in petroleum, chemical, pharmaceutical, fertilizer, power and other pipeline. It is also suitable for water and wastewater systems application because of the simple construction and low pressure drop across the valve.

 

 

·Design and manufacture: API6D, ANSI B16.34, BS1868

·Face to face dimensions: ANSI B16.10

·RF and RTJ Flanged end: 2” to 24” as per ANSI B16.5, 26” to 48” as per MSS SP-44

·Butt-welding end: ANSI B16.25

·Test and inspection: API598

·Other standards (DIN, BS, JIS) is also available upon request.

 

 

·Size: 2” to 36”

·Class: 150LB to 2500LB

·Features: Bolted cover or pressure seal cover, swing disc, threaded or welded seat ring

·Material: Carbon steel, stainless steel, alloy steel, such as WCB, WCC, WC1, WC6, WC9, C5, C12, CF8, CF8M, CF3, CF3M, CN7M, LCB, LCC, duplex stainless steel, monel, alloy 20, Al-bronze C95400, cast iron and ductile iron, etc.

·Operation: Lever with counterweight(option)

 

 

When fluid flows in the correct direction, the disc swings open to allow the fluid to pass through. When the flow stops, or the flow direction changes, the disc swings back and closes the valve to prevent backflow.

 

 

1.Simple design: They are simple in design and have fewer moving parts than other types of valves, which makes them reliable and easy to maintain.

2.Low pressure drop: They have a straight-through flow path, which results in minimal pressure drop across the valves when it is fully open.

3.Versatility: They are suitable for a wide range of applications, from water treatment plants to petrochemicals industry.

4.Cost-effective: They are cost-effective compared to other types of valves, which makes them a popular choice for many applications.

 

No.	Parts	Materials
1	Body	ATM A216 WCB
2	Seat ring	ASTM A105 + 13Cr
3	Disc	ASTM A216 WCB + 13Cr
4	Disc nut	ASTM A182 F6
5	Hinge	ASTM A216 WCB
6	Hinge pin	ASTM A182 F6
7	Gasket	spiral wounded stainless steel with graphite
8	Cover	ASTM A216 WCB
9	Cover bolt	ASTM A193 B7
10	Cover nut	ASTM A194 2H
11	Washer	Steel

 

Class 150

DN	50	65	80	100	125	150	200	250	300	350	400	450	500	600
NPS	2	2.1/2	3	4	5	6	8	10	12	14	16	18	20	24
L-L1(RF-BW)	203	216	241	292	330	356	495	622	699	787	864	978	978	1295
L2(RTJ)	216	229	254	305	343	368	508	635	711	800	876	991	991	1308
H	170	180	185	215	240	260	300	350	400	450	480	540	600	680
RF (Kgs)	15	26	27	42	69	75	124	200	310	428	555	775	835	1300
BW (Kgs)	12	17	18	32	57	60	106	174	258	368	483	685	720	1150

 

Class 300

DN	50	65	80	100	125	150	200	250	300	350	400	450	500	600
NPS	2	2.1/2	3	4	5	6	8	10	12	14	16	18	20	24
L-L1(RF-BW)	267	292	318	356	400	445	533	622	711	838	864	978	1016	1346
L2(RTJ)	283	308	333	371	416	460	549	638	727	854	879	994	1036	1368
H	170	185	215	235	270	300	340	350	420	480	520	600	670	750
RF (Kgs)	21	30	39	70	115	125	190	290	450	700	774	1000	1273	1650
BW (Kgs)	15	22	30	44	92	98	150	230	375	490	640	850	1100	1400

 

Class 600

DN	50	65	80	100	150	200	250	300	350	400	450	500	600
NPS	2	2.1/2	3	4	6	8	10	12	14	16	18	20	24
L-L1(RF-BW)	292	330	356	432	559	660	787	838	889	991	1092	1194	1397
L2（RTJ）	295	333	359	435	562	664	791	841	892	994	1095	1200	1407
H	175	200	230	295	360	400	460	520	560	650	730	800	900
RF (Kgs)	28	38	52	87	224	354	626	790	892	1200	1600	2420	3150
BW (Kgs)	20	30	140	65	133	280	530	670	752	1020	1350	2050	2720

 

Class 900

DN	50	65	80	100	150	200	250	300	350	400	450	500	600
NPS	2	2.1/2	3	4	6	8	10	12	14	16	18	20	24
L-L1(RF-BW)	368	419	381	457	610	737	838	965	1029	1130	1219	1321	1549
L2(RTJ)	371	422	384	460	613	740	841	968	1038	1140	1232	1334	1568
H	250	270	230	310	360	430	480	560	630	700	750	850	1000
RF (Kgs)	69	93	85	145	310	500	772	1080	1380	1810	2400	3500	4700
BW (Kgs)	60	78	70	120	265	385	600	860	1140	1510	2050	3100	4200

 

Class 1500

DN	50	65	80	100	150	200	250	300	350	400	450	500	600
NPS	2	2.1/2	3	4	6	8	10	12	14	16	18	20	24
L-L1(RF-BW)	368	419	470	546	705	832	991	1130	1257	1384	1537	1664	1943
L2(RTJ)	371	422	473	549	711	841	1000	1146	1276	1407	1559	1686	1972
H	250	270	300	330	450	500	560	650	750	800	900	1000	1200
RF (Kgs)	69	93	120	235	540	945	1275	1870	2560	3260	4080	5950	8000
BW (Kgs)	60	78	90	185	450	785	1065	1550	2100	2700	3400	5200	7100

 

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