Heavy Duty Swing Check Valve with Lever & Spring for Reliable Flow

Product Description

Heavy Duty Swing Check Valve with Lever & Spring for Reliable Flow

Product Description

The Heavy Duty Swing Check Valve with Lever & Weight Spring is engineered for reliable and efficient flow control in industrial pipelines.

Designed with a robust body and precision internal components, it prevents backflow and ensures smooth, uninterrupted operation even under high pressure and demanding conditions.

The lever and weight spring mechanism provide fast response and added safety, reducing water hammer and protecting your system. Ideal for water treatment, HVAC, chemical, and power plant applications, this swing check valve combines durability, stability, and easy maintenance, making it a trusted choice for critical pipeline systems.

Specification

NO	Name	Material
		Chinese Spec	ASTM Spec
1	Cover	QT450-10	A536 65-45-12
2	Body	QT450-10	A536 65-45-12
3	Seat	0CrNi18	ASTM A276 304
4	Shaft	1Cr13	ASTM 410
5	Cylinder	Aluminum	ASTM 6061

Nominal Diameter: DN50-DN750, 2'--40'

Nominal Pressure: Class150/PN16

Flanged End Standard: ANSI B16.1,EN1092-2,GB/T17241.6

Working Temperature: -20ºC- 120ºC

 

NPS	2 1/2	3	4	5	6	8	10	12	14	16	18	20	24	28	30	40
DN	65	80	100	125	150	200	250	300	350	400	450	500	600	700	750	1000
L	216	241	292	330	356	495	622	698	787	914	1016	1016	1295	1448	1524	2250
Kv	-	10	22	-	51	100	136	207	278	349	457	564	786	-	1285	-
Cv	-	12	26	-	59	117	158	242	325	408	533	658	917	-	1500	-

 

Advantages

1, Automatic open and close under the medium pressure inside the pipe. It is a kind of automatic valve.

2, Prevent medium backflow, one direction flow.

3, Can attach spring kit or counter weight to help the disc close faster, This could eliminate damageable water hammer.

4, It can also attach the air cushion cylinder. At the beginning the valve close quickly. But when disc close to 70% close position, the air cushion cylinder will start to work and help the disc close slowly.
This could prevent the medium in the pipe to build up pressure and damage the pipe system.

Packaging & Shipping

 

 

 

Company Profile

Shanghai Flow Valve &Fitting Co, Ltd. was founded in 1998, mainly in foreign trade export business, has invested in two professional manufacturing factories in Shanghai Jiading Waigang Industrial Zoneand Tianjin Wuqing Jingbin Industrial Park.

These two subordinate factories are responsible for the professional production of ANSl, DINBS, GB and other standards of ball valve, butterfly valve, gate valve, stop valve, balance valve, filter, plug valve, control valve and other series of products.

Nearly 80% of the company's products are exported to Europe,America, the Middle East, Southeast Asia and other parts of the world and we also conduct technical cooperation and OEM production with many European and American companies.

Shanghai Flow Valve & Fitting Co., Ltd. began to actively participate in major domestic engineering projects in 2003.

lt has established five sales centers in Shanghai, Beijing, Guangzhou, Xi'an and Chongqing, and its business covers northeast China, North China, northwest China,Southwest China, Central China, South China and other regions.

The sales network and after-sales network basically cover most regions of mainland China.

 

 

Certifications

Exhibition

 

FAQ

- FAQ

Q1: What is a swing check valve?
A1: A swing check valve is a one-way valve that prevents backflow, ensuring safe and reliable pipeline operation.

Q2: What does the lever & weight do?
A2: The lever and weight provide faster disc movement, reducing water hammer and protecting pumps and pipelines.

Q3: Where is this valve typically used?
A3: Ideal for water treatment, HVAC, chemical, power plants, and industrial pipelines requiring high-pressure flow control.

Q4: What materials are available?
A4: High-quality cast iron, ductile iron, or stainless steel ensure durability, corrosion resistance, and long service life.

Q5: What pressure ratings are offered?
A5: Available in PN10, PN16, PN25, and custom ratings to suit medium and high-pressure systems.

Q6: What sizes are available?
A6: Ranging from DN50 to DN600 (or customized sizes), meeting various system requirements.

Q7: How do I install a swing check valve?
A7: Install following the flow direction marked on the body, with proper support to prevent vibration.

Q8: How do I maintain the valve?
A8: Inspect the disc, hinge, and lever mechanism regularly; clean debris to ensure smooth operation.

Q9: Can it handle high flow rates?
A9: Yes, the heavy-duty design supports high flow while maintaining reliable backflow prevention.

Q10: Is customization available?
A10: Yes, we provide custom sizes, materials, and pressure ratings to meet specific project needs.

Q11: How does this valve improve pipeline safety?
A11: It prevents reverse flow, reduces water hammer, and protects pumps and other critical equipment.

Q12: What standards does this valve meet?
A12: Manufactured according to ISO, API, and DIN standards to ensure quality and reliability.

Q13: Can it be used in horizontal and vertical pipelines?
A13: Yes, it works in both horizontal and vertical installations with proper lever and weight adjustment.

Q14: How does it reduce operational costs?
A14: By protecting pumps and preventing system damage, it minimizes maintenance and downtime costs.

Q15: How do I choose the right swing check valve?
A15: Select based on pipe size, flow rate, pressure rating, material, and system requirements. Our team can assist you with selection.