BR.W7 Series Butterfly Valves
Custom BR.W7 Series Butterfly Valves
Provide High-qualityControl Valve Solutions

About US

Zhejiang Lasen Intelligent Equipment Co., Ltd. ( Used to be known as Hangzhou Lasen Valve Co., Ltd. ), located in Hangzhou Changkou industrial zone, which is on the Bank of Fuchun River. Founded in 2004 with a registered capital of 100 million yuan, the company is a science and technology enterprise integrating R & D, production, sales, and maintenance of control valves. Zhejiang Lasen Intelligent Equipment Co., Ltd. is Carbon Steel Eccentric Butterfly Valve Manufacturer and Carbon Steel Eccentric Butterfly Valve Supplier.

Our company is a national high-tech enterprise, a national science and technology-based small and medium-sized enterprise, an industry-university research teaching base of Zhejiang University of Technology, and a teaching base of "engineer training plan". We have passed ISO9001 \ ISO45001 management system certification, special equipment manufacturing license (class A1 certification) issued by the State Administration of market supervision, functional safety certification (safety integrity level reaches SIL2 / SIL3) and EU safety certification "CE", ball valve and butterfly valve products have passed API607 fire protection certification, regulating valve has passed ISO15848 valve low leakage rate certification, In the process of product development, our company continues to introduce international advanced technology and adopts CAD, CAE, CAM, FEA, and finite element analysis and design. At the same time, we have set up a new product R & D center, life test center, high-temperature test center and low-temperature test center, so as to ensure the quality of all our products. We also have a professional team engaged in R&D, manufacturing and management, marketing and finished product inspection of regulating valves for many years.

Zhejiang Lasen Intelligent Equipment Co., Ltd.
  • 2004
    In February 2004, the company was registered and established.
  • 2012
    In June 2012, the company reached a cooperation agreement with BrightonWell in the United States on advanced control valve technology.
  • 2013
    In March 2013, the company cooperated with Zhejiang University of Technology to establish an industry university research teaching base and an excellent engineer training base.

    In July 2013, the company developed high-performance intelligent three eccentric butterfly valves for DN500, Class900LB, and 1500Lb hydrogenation units.
  • 2014
    In January 2014, the company's series of products were officially named (BR.W series).
  • 2016
    In October 2016, the company's products obtained TRCU and CE certifications and were exported overseas.
  • 2017
    In April 2017, the company's products passed the TS A2 level renewal audit of the special equipment production license.
  • 2019
    In May 2019, the company's products passed the API607 fire protection certification.
  • 2020
    In December 2020, the company was awarded the title of "National High tech Enterprise".
  • 2021
    In February 2021, the company completed a new 10000 square meter factory and upgraded its special equipment production license to A1 level.

    In October 2021, the company's products passed the SIL2/3 Functional safety certification.
  • 2022
    In August 2022, the company was awarded the title of "Hangzhou Enterprise High tech Research and Development Center".
  • 2023
    In February 2023, the company's products passed the "Made in Zhejiang" product certification.

    In March 2023, the company's products passed ISO15848 low leakage rate certification.


International system certification, effectively consolidate the competitiveness of the enterprise.

  • TUV ISO15848 Certificate (4
  • TUV ISO15848 Certificate (4
  • TUV ISO15848 Certificate (8
  • API607 Fire Certification(Q41F-CL150 NPS 4)
  • API607 Fire Certification(Q347F-CL150 NPS 8)
  • API607 Fire Certification(Q41F-CL150 NPS 2)
  • API607 Fire Certification(BR.W72 /150LB NPS2)
  • API607 Fire Certification(BR.W73/150LB NPS2)
  • API607 Fire Certification(BR.W8/600LB NPS2)
  • API607 Fire Certification(BR.W72/150LB NPS4)
  • API607 Fire Certification(BR.W73/150LB NPS4)
  • API607 Fire Certification(BR.W8/ 600LB NPS4)

News and Information

Industry Knowledge

How do the size and configuration of carbon steel eccentric butterfly valves impact their flow control capabilities and compatibility with various piping systems?

The size and configuration of carbon steel eccentric butterfly valves play a significant role in determining their flow control capabilities and compatibility with various piping systems. Here's how these factors impact the performance of these valves:
Size (Diameter):
Flow Capacity: The size of the valve's diameter directly affects its flow capacity. Larger-diameter valves can handle higher flow rates, making them suitable for applications that require greater fluid throughput.
Pressure Drop: A larger valve diameter generally results in lower pressure drop across the valve, which can be advantageous in applications where minimizing pressure loss is critical.
Turndown Ratio: Valve size impacts the turndown ratio, which is the range of flow rates over which the valve can effectively control flow. Larger valves often have a broader turndown ratio, allowing for more versatile flow control. Configuration (Type of Valve):
Eccentric vs. Concentric: Carbon steel eccentric butterfly valves are designed with a slight offset between the stem and the centerline of the disc. This eccentric design minimizes wear, provides a tighter seal, and reduces the potential for water hammer, making them suitable for applications with slurries and high-viscosity fluids. Concentric butterfly valves have the stem centered in the disc and are better suited for clean, non-abrasive fluids.
Wafer, Lug, or Flanged: The valve configuration (wafer, lug, or flanged) affects how the valve is installed and connected to the piping system. Wafer-style valves are sandwiched between flanges, making them easy to install and suitable for applications with limited space. Lug-style valves have threaded inserts for mounting between flanges and are often used when one side of the piping system is difficult to access. Flanged valves have integral flanges for direct bolting to the pipeline.
Bi-Directional or Uni-Directional: Some eccentric butterfly valves are bi-directional, allowing flow in both directions, while others are uni-directional, designed for flow in one direction only. The choice depends on the specific requirements of the application.

What advantages does carbon steel offer as a material for eccentric butterfly valves, particularly in applications involving corrosive or high-pressure fluids?

Carbon steel offers several advantages as a material for eccentric butterfly valves in applications involving corrosive or high-pressure fluids:
Corrosion Resistance: Carbon steel is known for its resistance to corrosion, especially when properly coated or protected. This makes it suitable for handling corrosive fluids without compromising the integrity of the valve.
High Strength: Carbon steel is inherently strong, allowing it to withstand high-pressure conditions commonly found in industrial processes. It provides structural integrity and reliability in challenging environments.
Cost-Effective: Carbon steel is generally more cost-effective than some alternative materials, such as stainless steel or exotic alloys. This affordability is particularly advantageous for larger valve sizes and projects with budget constraints.
Temperature Range: Carbon steel can operate effectively in a wide range of temperatures, from extremely low to moderately high, making it versatile for various process applications.
Ease of Machining: Carbon steel is relatively easy to machine and fabricate, which simplifies the manufacturing process and allows for precise construction of valve components.
Weldability: Carbon steel is highly weldable, facilitating the assembly and integration of eccentric butterfly valves into piping systems without compromising their structural integrity.