Regularly wipe off dust and dirt.

Regularly check the valve if stored for an extended period (every three months). Inspect for dirt, rust, and the condition of the sealing surface and welding joints. After cleaning, reapply anti-rust oil for protection.

Swing Check Valve

Trusted Swing Check Valve Manufacturer

NTVAL offers durable Swing Check Valves for tough environments, ensuring long-lasting performance and optimal flow control. With easy installation and low maintenance, our valves provide exceptional value and reliability.

Reliable Swing Check Valve

Control de calidad

The PMI test checks that each Swing Check Valve uses the correct metals, providing strength and durability for secure fluid control.

Prueba PMI

During the sealing test, we verify that the Swing Check Valve stops reverse flow, maintaining a leak-free environment within the system.

Prueba de estanquidad

The low emission test looks for leaks, helping the Swing Check Valve meet environmental standards by reducing any unintended emissions.

Prueba de bajas emisiones

In the impact test, we measure the Swing Check Valve’s ability to handle sudden forces, ensuring it operates safely under pressure.

Prueba de impacto

Dimension inspection confirms that each Swing Check Valve fits correctly in its designated space, supporting tight connections and reliable use.

Inspección dimensional

This test measures the paint coating on the valve, helping protect the Swing Check Valve from corrosion and extending its service life.

Prueba de espesor de pintura

Penetrant testing reveals small surface flaws on the Swing Check Valve, identifying areas that could affect its strength and functionality.

PT

Material inspection verifies that all parts of the Swing Check Valve meet high-quality standards, supporting reliable and long-lasting performance.

Inspección de materiales

Aplicaciones de nuestras válvulas en sectores clave

Descubra cómo nuestras avanzadas soluciones de válvulas mejoran el control del flujo, ofreciendo mayor eficacia, seguridad y una estricta garantía de calidad.

Swing Check Valves prevent dangerous backflow in chemical plants, controlling fluid direction safely and reducing contamination risks.

Procesado químico

For nuclear operations, Swing Check Valves stop backflow in pressurized systems, protecting sensitive equipment from unexpected reverse flow.

Gasolina Química

For nuclear operations, Swing Check Valves stop backflow in pressurized systems, protecting sensitive equipment from unexpected reverse flow.

O.P.G & Nuclear

Swing Check Valves maintain one-way flow in pulp processing, handling thick materials smoothly while reducing blockages and flow interruptions.

Pulp

In mining, Swing Check Valves handle rough materials, preventing backflow that could cause system damage or slow down production.

Minería

Swing Check Valves control flow direction in water and sewage systems, stopping reverse flow to maintain clean and efficient operations.

Agua y alcantarillado

In steam systems, Swing Check Valves manage steam flow direction, preventing backflow that could harm equipment and affect efficiency.

Sistema de vapor

For boiling systems, Swing Check Valves handle high temperatures, blocking reverse flow to support safe and steady fluid control.

Sistema de ebullición

Typical Cast Steel Bolted Cover Swing Check Valve Expanded View

Piezas y materiales estándar

Cast Steel Swing Check Valve

Válvula antirretorno de disco basculante

Swing Check Valve Working Principle

The swing check valve uses a built-in rocker swing structure. All the valve’s opening and closing parts are located inside the valve body, so there are no points of leakage except for the sealing gasket and sealing ring at the middle flange. This design effectively prevents any possibility of valve leakage.

The connection between the swing check valve and the valve clack features a spherical connection structure, allowing the valve clack to move freely within a 360-degree range, ensuring precise positioning.

When the medium flows downstream, it pushes the valve flap open, known as the cracking pressure. If the medium’s pressure drops below the cracking pressure, the valve automatically shuts. In the event of reverse flow, the valve flap seals against the valve seat by the force of the medium, closing the valve.

Swing Check Valve: Structural Features

Maintenance of Swing Check Valve

Swing check valves require minimal maintenance and are known for their long lifespan. However, they can develop leaks if foreign particles get stuck between the disc and seat, which can reduce the valve’s effectiveness. To prevent damage to swing check valves, follow these simple maintenance steps:

Keep the valve clean

Regularly wipe off dust and dirt.

Conduct regular inspections

Check for leaks.
Replace the valve if significant leakage is found.
Inspect for corrosion, rust, and wear.
Monitor the pressure and temperature of the fluid to ensure they are within the valve’s limits.

Valve replacement procedure

Thoroughly clean the removed valve with the appropriate hydraulic liquid or medium.
Inspect for debris, scratches, corrosion, wear, or rough surfaces.
Smooth and lap any rough areas before reassembling the valve.

Storage recommendations

Keep the valve lubricated in a dry, ventilated room to prevent moisture, rain, and rust.
Ensure the valve’s opening and closing parts are in the closed position during storage or transportation.
Fix the valve disc in the open position.
Block the inner ports at both ends with foam plates, and tightly plug the ports with stuffed caps to prevent dust and rust.

Long-term storage

Regularly check the valve if stored for an extended period (every three months).
Inspect for dirt, rust, and the condition of the sealing surface and welding joints.
After cleaning, reapply anti-rust oil for protection.

Product Standards

Design Standard: API602, ASME B16.34, API6D ensure performance, safety, and reliability for various industries.
Structure Length: Compliant with ASME B16.10, ensuring compatibility with existing piping systems.
Material and Temperature: ASME B16.34 specifies materials and temperature limits for durability and performance in demanding conditions.
Inspection Standard: API598 and API6D standards ensure valves are tested for leaks, pressure, and operational integrity.

Application of Swing Check Valve

Suitable Media: Water, steam, oil, nitric acid, acetic acid, strong oxidizing media, and urea, ensuring versatility in various applications.
Common Industries: Petroleum, chemical, pharmaceutical, fertilizer, and power industries, supporting essential operations across sectors.
Recommended Use: Ideal for clean media, preventing contamination and maintaining operational efficiency.
Not Recommended For: Media containing solid particles, high viscosity, or low-flow, pulsating conditions, as these can cause damage to the valve disc and seat, impacting performance.

Installation and Uses of Swing Check Valve

The Rotary Kai Type Check Valve is designed for vertical installation on horizontal pipes and should be prioritized on official road levels. It can also be installed on vertical pipes with a bottom-up medium flow.

Pre-installation Steps:

Remove the stuffy cover and foam plate from both ends of the valve channel.
Clean the valve disc and inner cavity, removing any grease and debris.
Check the valve disc movement by pushing it away from the seat to ensure it moves freely.
Inspect valve ends for burrs or edges that could affect sealing.

Installation Guidelines:

Ensure the valve is installed in the direction of the flow arrow.
For vertical installation, the flow should be from bottom to top.
For horizontal installation, the cover should be at the top with upward flow.

Medium Requirements: The medium should be free of hard particles to avoid damage to the valve’s sealing surface.

Fault and Troubleshooting

Swing check valves are crucial components in many systems, as reverse flow can sometimes cause significant damage. Therefore, it’s essential to detect any issues with the valves early to prevent pipeline shutdowns and costly repairs. The most common problems with Check Valves include:

Preventive Maintenance Tips

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Más información general

Specs of Swing Check Valve

One-Way Flow Mechanism

Swing Check Valves are designed to facilitate easy maintenance within the system and prevent the backflow of fluids. These valves operate as one-way mechanisms, allowing flow to move freely in one direction while blocking it in the reverse direction. An external lever and weight are used to speed up the closure of the disc, ensuring effective flow control.

Rapid Closure System

The closure of a Swing Check Valve relies on gravity, but gravity alone is insufficient to close the valve quickly enough to prevent backflow. To address this, a weight is used to ensure the valve closes rapidly, preventing reverse velocities from slamming the disc into the valve seat. This rapid closure mechanism protects the valve disc, seat, and surrounding pipeline equipment from potential damage.

Low-Pressure Drop

The design of Swing Check Valves ensures a low-pressure drop across the valve, which is crucial for maintaining efficient system operation. For instance, the streamlined flow path minimizes resistance, allowing fluids to pass through with minimal energy loss. This feature is particularly important in applications where maintaining pressure is critical for system performance.

Features of Swing Check Valve

Construcción duradera

Swing Check Valves are crafted from high-grade stainless steel and other durable materials, providing resistance to corrosion and wear even in challenging industrial environments. This strong construction supports a longer lifespan for the valves and withstands high pressure and temperature variations.

Reliable Backflow Prevention

These valves feature a swing disc that allows flow in one direction and automatically closes to prevent reverse flow. The swing mechanism is designed for minimal pressure drop and efficient flow control. On top of that, the precision-fit disc and seat create a tight seal, preventing leakage and maintaining system integrity.

Easy Installation and Maintenance

Swing Check Valves feature flanged or threaded connections for easy installation and a removable bonnet for quick maintenance. NTVAL’s design simplifies servicing, reducing downtime, and ensures compatibility with various piping systems.

Benefits of Swing Check Valve

Enhanced Operational Efficiency

Swing Check Valves provide efficient flow control, minimizing energy loss in the system, leading to reduced operational costs and improved system performance. The low-maintenance design contributes to higher overall efficiency, while reliable backflow prevention maintains consistent operation and prevents system disruptions.

Long-Term Cost Savings

The durable materials and strong construction of Swing Check Valves extend their lifespan, reducing the need for frequent replacements and costly repairs. Easy maintenance features lower upkeep costs and minimize downtime. Reliable prevention of backflow and leakage protects the system from potential damage, resulting in further cost savings and improved operational efficiency.

Versatility and Adaptability

Swing Check Valves are suitable for various industrial applications, including oil, chemical, and water treatment plants. Their ability to handle different mediums and withstand harsh conditions makes them highly versatile. Easy installation and compatibility with standard piping systems enhance their adaptability, making them effective in diverse operational settings.

Applications of Swing Check Valve

Industria petroquímica

In the petrochemical industry, Swing Check Valves are very important for keeping operations safe and efficient. They stop backflow in pipelines carrying various chemicals and gases. Their strong build handles the tough conditions found in petrochemical plants. This helps maintain the flow and keeps the system clean from contamination.

Water and Sewage Treatment

In water and sewage treatment plants, Swing Check Valves manage the flow of untreated and treated water. They prevent backflow, which is vital for keeping the treatment process clean and efficient. NTVAL recommends that the valves’ strong build lets them handle the rough and corrosive nature of sewage. This helps the treatment systems work smoothly and last longer.

Sistemas de vapor y ebullición

Swing Check Valves are key in steam and boiling systems to control steam flow direction. For instance, they stop steam from flowing backward, which can cause problems or damage. These valves work well under high temperatures and pressures found in these systems. Additionally, they help boilers and steam networks run safely and efficiently.

Minería y tratamiento de minerales

Swing Check Valves are essential in mining and mineral processing, where they manage the flow of slurry and other abrasive materials. They stop backflow, which can lead to equipment wear and pipeline damage. Their robust design makes them well-suited to withstand the harsh, abrasive conditions often found in mining operations.

3 Considerations When Buying Swing Check Valve

01 Uses Stainless Steel 316

When choosing a Swing Check Valve, it’s important to pick the right material for the fluid it will handle. The valve material should resist the chemicals, temperature, pressure, and abrasiveness of the environment. For example, stainless steel 316 is good for corrosive environments, while carbon steel works well with non-corrosive fluids.

02 Pressure Ratings of 150 PSI to 300 PSI

Check the pressure and temperature ratings of the Swing Check Valve to match your system’s needs. Swing Check Valves typically have ratings like 150 PSI or 300 PSI. NTVAL recommends ensuring the valve can handle your system’s maximum pressure and temperature to prevent issues.

03 Valve Size of ½ Inch to 24 Inches

Consider the size of the valve and how it affects the flow rate in your system. Swing Check Valves come in different sizes, usually from ½ inch to 24 inches or more. Similarly, the valve size should match the pipe diameter for proper flow control and minimal pressure drop. Knowing the required flow rate (GPM – gallons per minute) will help you pick the right valve size for efficient operation.

FAQs About Swing Check Valve

1. What is the minimum order quantity for swing check valves?

There is no minimum order quantity; even a single swing check valve can be ordered.

2. What are the typical pressure ratings for swing check valves?

Swing check valves typically come with pressure ratings of 150 PSI, 300 PSI, or higher, depending on the specific application.

3. What is the average lead time for swing check valve orders?

The lead time for swing check valve orders depends on the valve size and quantity, but generally, production takes around 5-8 weeks.

4. What are the payment terms for ordering swing check valves?

At NTVAL, the payment terms are 30% down payment with the balance due before shipment, or 100% irrevocable letter of credit (LC) at sight.

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NO.	NOMBRE DE LA PARTE	ACERO AL CARBONO			ACERO ALEADO			ACERO INOXIDABLE
		TIPO WCB	TIPO LCB	TIPO WC6	TIPO WC9	TIPO C5	TIPO C12	TIPO CF8M
1	CUERPO	A216-WCB	A352-LCIB	A217-WC6	A217-WC9	A217-C5	A217-C12	A351-CF8M
2	COVER	A216-WCB	A352-LCIB	A217-WC6	A217-WC9	A217-C5	A217-C12	A351-CF8M
3	DISC	A217CA15o	A351 CF8Mor	A217CA15o	A217CA15o	A217CA15o	A217CA15o	A351-CF8M
		WCB+410	LCB+316	WC9+410	WC9+410	C5+410	C12+410
4	SEATRING	A105	A182-F316	A182F11+STL	F22+STL	F5a+STL	F9+STL	A479-316
5	HINGEARM	A216-WCB	A352-LCB	A217-WC6	A217-WC9	A217-C5	A217-C12	A351-CF8M
6	DISCNUT	A194 Gr8	A194 Gr8	A194 Gr8	A194 Gr8	A194 Gr8	A194 Gr8	A194-8
7	WASHER	A240-304	A240-316	A240-304	A240-304	A240-304	A240-304	A240-316
8	SPLIT PIN	A580-304	A580-316	A580-304	A580-304	A580-304	A580-304	A580-316
9	COVER BOLT	A193-B7	A320-L7	A193-B16	A193-B16	A193-B16	A193-B16	A193-B8
10	COVER NUT	A194-SH	A194-4	A194-4	A194-4	A194-4	A194-4	A194-8
11	HINGE PIN	A479-410	A479-410	A479-410	A479-410	A479-410	A479-410	A479-316
12	FLANGEDPLUG	A479-410	A479-304	A479-304	A479-304	A479-304	A479-304	A479-316
13	JUNTA	Grafito+304SS	Grafito+304SS	Grafito+304SS	Grafito+304SS	Grafito+304SS	Grafito+304SS	Grafito+304SS
14	PLUGGASKET	Acero blando	Acero blando	SoftSteel	SoftSteel	SoftSteel	Acero blando	Acero inoxidable
15	NAMEPLATE	Acero inoxidable	Acero inoxidable	Acero inoxidable	Acero inoxidable	Acero inoxidable	Acero inoxidable	Acero inoxidable

Cara a cara	ASME/ANSI B16.10
Brida final	ASME/ANSI B16.5*.
Soldadura a tope	ASME/ANSI B16.25
Clase	ASME/ANSI CL150

CLASE 150 DIMENSIÓN
TALLA (pulg.)	1-1/2″	2″	2-1/2″	3″	4″	6″	8″	10″
								Unidad:pulgada
L1:RF	6.5	8	8.5	9.5	11.5	14	19.5	24.5
L2:RTJ	7	8.5	9	10	12	14.5	20	25
L3:BW	6.5	8	8.5	9.5	11.5	14	19.5	24.5
H	5.11	6.3	6.7	7.49	8.87	10.18	12.6	13.72
WT R F	33	38	48	68	110	203	299	430
(bs) BW	28	31	38	56	95	183	266	284
TALLA (pulg.)	12″	14″	16″	18″	20″	24″	30″	36″
								Unidad:pulgada
L1:RF	27.5	31	34	38.5	38.5	51	60	77
L2:RTJ	28	31.5	34.5	39	39	51.5	60.5	77.5
L3:BW	27.5	31	34	38.5	38.5	51	60	77
H	14.96	15.79	18.11	19.88	22.2	26.89	36	41.5
WT RF	628	926	1,102	1,411	1,720	3,285	5,077	8,160
(lbs) BW	572	804	980	1,160	1,495	2,945	4,315	7,010

Cara a cara	ASME/ANSI B16.10
Brida final	ASME/ANSI B16.5*.
Soldadura a tope	ASME/ANSI B16.25
Clasificación	ASME/ANSI Clase 300

CLASE 300 DIMENSIÓN
TALLA (pulg.)	2″	2-1/2″	3″	4″	6″	8″	10″	12″ Unidad:pulgada
L1:RF	10.5	11.5	12.5	14	17.5	21	24.5	28
L2:RTJ	11.13	12.13	13.33	14.63	18.13	21.63	25.13	28.63
L3:BW	10.5	11.5	12.5	14	17.5	21	24.5	28
H	6.3	7.44	7.83	8.94	10.94	12.68	15.08	17.13
WT R F	56	72	108	160	299	406	657	916
(bs) BW	43	55	88	102	240	317	525	750
TALLA (pulg.)	14″	16″	18″	20″	24″	30″	36″	Unidad:pulgada
L1:RF	33	34	38.5	40	53	62.75	82
L2:RTJ	33.63	34.63	39.13	40.75	53.88	63.75	83
L3:BW	33	34	38.5	40	53	62.75	82
H	20.08	20.51	22.52	24.76	28.03	37	42.99
WT R F	1,503	1,649	2,097	2,494	4.5	5,850	10.5
(lbs) BW	1,241	1,305	1,803	2,150	3.,870	5,020	9,450

CLASE 600 DIMENSIÓN
TALLA (pulg.)	2″	3″	4″	6″	8″	10″	12″	14″	16″	18″	20″	24″ Unidad:pulgada
L1:RF	11.5	14	17	22	26	31	33	35	39	43	47	55
L2:RTJ	11.63	14.13	17.13	22.13	26.13	31.13	33.13	35.13	39.13	43.13	47.25	55.38
L3:BW	11.5	14	17	22	26	31	33	35	39	43	47	55
H	7.38	8.25	10.06	12.94	14.31	18.25	19.13	22.5	26	28	31	34
WT RF	71	130	247	474	849	1,351	1,918	2,068	2,976	4,451	5,269	6,634
(bs) BW	Ge	110	223	364	686	1,081	1,605	1,693	2,469	3,802	4,443	5,137
CLASE 900 DIMENSIÓN
TALLA (pulg.)	2″	3″	4″	6″	8″	10″	12″	14″	16″	18″	20″	24″ Unidad:pulgada
L1:RF	14.5	15	18	24	29	33	38	40.5	44.5	48	52	61
L2:RTJ	14.63	15.13	18.13	24.13	29.13	33.13	38.13	40.87	44.87	48.5	52.5	61.75
L3:BW	14.5	15	18	24	29	33	38	40.5	44.5	48	52	61
H	10.51	11.42	12.05	13.31	18.11	19.69	22.75	25.47	27.95	30.9	33.46	36.61
WT RF	161	181	307	582	1,210	1,800	3,200	3,850	5,324	7,150	8.8	12.76
(bs) BW	119	136	235	247	1,010	1,545	2,720	3,190	4,510	5,940	7,260	9.9
CLASE 1500 DIMENSIÓN
TALLA (pulg.)	2″	3″	4″	6″	8″	10″	12″	14″	16″	18″	20″	24″ Unidad:pulgada
L1:RF	14.5	18.5	21.5	27.75	32.75	39	44.5	49.5	54.5	60.5	65.5	76.5
L2:RTJ	14.63	18.63	21.63	28	33.13	39.37	45.12	50.25	55.37	61.37	66.37	77.63
L3:BW	14.5	18.5	21.5	27.75	32.75	39	44.5	49.5	54.5	60.5	65.5	76.5
H	10.51	11.65	13.98	18.31	21.26	22.64	26.38	28.54	31.89	35.63	39.57	44.27
RF	161	276	467	1,067	2,356	3,663	5,445	7,128	9,700	13,060	16,130	23,265
(bs) BW	119	209	362	813	1,910	2,930	4,310	5,600	7,720	10,395	12,770	17,820

CLASE 150 DIMENSIÓN
TALLA (pulg.)	2″	2-1/2″	3″	4″	6″	8″	10″	12″	14″	16″	18″	20″	24″	26″	28″	30″	32″ Unidad:pulgada
L	203	216	241	292	356	495	622	698	787	864	978	978	1295	1295	1143	1143	1194
D	160	182	196	230	300	390	432	510	540	635	700	770	900	930	991	1020	1150
W	178	198	224	252	326	426	456	530	576	670	740	818	948	988	1050	1090	1240
W.T(kg)	11	16	22	34	62	112	169	238	337	420	550685	685	910	1055	1260	1540	1860
CLASE 300 DIMENSIÓN
TALLA (pulg.)	2″	2-1/2″	3″	4″	6″	8″	10″	12″	14″	16″	18″	20″	24″	26″	28″	30″	32″ Unidad:pulgada
L	267	292	318	356	444	533	622	711	838	864	978	1016	1346	1346	1295	1372	1448
D	170	196	214	245	320	400	460	540	580	660	725	800	940	970	1040	1080	1210
W	198	220	232	268	360	426	457	572	620	690	760	848	988	1018	1250	1280	1350
W.T(kg)	17	22	32	97	110	162	228	380	443	530	780	980	1320	1364	1762	2050	2870

CLASE 600 DIMENSIÓN
TALLA (pulg.)	2″	2-1/2″	3″	4″	6″	8″	10″	12″	14″	16″	18″	20″	24″ Unidad:pulgada
L	292	330	356	432	559	660	787	838	889	991	1092	1194	1397
D	185	196	210	270	340	440	520	570	610	690	755	850	990
W	212	225	240	298	405	460	492	602	650	710	780	902	1040
W.T(kg)	27	44	47	115	190	320	430	586	750	1015	1480	2050	2550