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Micro-resistance slow-closing check valve, also known as the check valve, its role is to prevent medium backflow in the pipeline. The opening and closing parts open or close by themselves depending on the medium flow and force to prevent the medium backflow valve is called a check valve. Check valves belong to automatic valves. They are mainly used in pipelines where media flow in one direction. Only one direction is allowed to flow in order to prevent accidents. It is suitable for cleaning medium, not for medium containing solid particles and high viscosity.
purpose
Micro-resistance slow-closing check valves are suitable for nominal pressure PN1.0 MPa~42.0 MPa, Class150-2500; nominal diameter DN15-1200mm, NPS1/2-48; working temperature-196-540 C pipelines to prevent medium backflow. By choosing different materials, it can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing medium and urea and other media.
Main material
Carbon steel, low temperature steel, dual phase steel (F51/F53), titanium alloy, aluminium bronze, INCONEL625, SS304, SS304L, SS316, SS316L; chromium-molybdenum steel, Monel (400/500), 20 # alloy, Harrington alloy and other metal materials.
Structural characteristics
1. Structural length is short, and its structural length is only 1/4~1/8 of the traditional flange check valve.
2. Small size, light weight, its weight is only 1/4~1/20 of the traditional micro-blocking check valve.
3. The valve disc closes quickly and the water hammer pressure is low.
4. Horizontal or vertical pipes are available and easy to install.
5. Flow passage is unobstructed and fluid resistance is small.
6. Sensitive movement and good sealing performance
7. Short disc stroke and low impact of valve closure
8. Integral structure, simple and compact, beautiful appearance
9. Long service life and high reliability
Performance specification
| Nominal diameter(mm) | 40~800 | |||
| Nominal pressure | 1.0 | 1.6 | 2.5 | |
| Ps(MPa) | housing | 1.5 | 2.4 | 3.75 |
| Seal up | 1.1 | 1.76 | 2.75 | |
| Maximum working pressure | 1.0 | 1.6 | 2.5 | |
| working temperature | The temperature of <80 ~C can reach 200 ~C according to user’s requirement. | |||
| Applicable medium | Water, Weak Corrosive Medium | |||
Major Component Materials
| Part name | Material name |
| Body and bonnet | Gray Iron, Cast Steel, Ductile Iron |
| Disc | Rubber assemblies |
| Valve shaft | Stainless steel |
Design drawings
Main Dimensions Table
| DN(mm) | L | H | B |
| 40 | 200 | 300 | 220 |
| 50 | 230 | 300 | 270 |
| 65 | 290 | 320 | 290 |
| 80 | 310 | 354 | 300 |
| 100 | 350 | 350 | 320 |
| 125 | 400 | 380 | 340 |
| 150 | 480 | 500 | 410 |
| 200 | 500 | 580 | 450 |
| 250 | 600 | 670 | 550 |
| 300 | 700 | 730 | 580 |
| 350 | 800 | 820 | 630 |
| 400 | 900 | 920 | 700 |
| 450 | 1000 | 950 | 800 |
| 500 | 1100 | 1100 | 900 |
| 600 | 1300 | 1200 | 990 |
| 700 | 1400 | 1550 | 1120 |
| 800 | 1500 | 1700 | 1300 |
American LIKE valves is a global supplier of flow control products£¬solution and services with a diverse range of products, for infrastructure and industrial fluid control. Our solution is an integral key part of the pipeline management solution, adopting advanced mechanical technology and automation system, so that the products always maintain excellent quality, and responding to customer needs correctly and fast. LIKE valve’s customers and markets cover water supply and drainage, water treatment, heating, construction, fire fighting, HVAC systems, power plants, petrochemical, natural gas pipelines, ships and other fields.
LIKE valves always adhere to the quality policy of “quality is the life of products, products are the life of LIKE”, have been passed ISO9001, ISO14001, OHSAS18001, TS, API, CE, ROHS£¬CCC certificate of professional testing institutions. We take customer satisfaction as the purpose, take our mission to realize the value by supply excellent service to our customers, strive to do even better on each product, each service, to provide continuous guarantee for customers all over the world.
In 2016, LIKE valve products entered Chinese market. In 2017, LIKE Valve was registered Like Valves (Tianjin) Co., LTD. in China, a joint venture of the United States and China, dedicated to serving customers in the Asia-Pacific region and China.
LIKE valve adhering to the concept of “integrity, innovation, cooperation and mutual benefit”, building our brand with product quality and customer satisfaction; improving and surpass ourselves with unremitting pursuit and sustainable development. “LIKE Dream” will contribution to “China Dream” more wonderful!
