Precision control

Precision control

Ensure safety

Precise control Safe and reliable

Bohao Valve
Precision control

Precision control

Ensure safety

Precise control Safe and reliable

Bohao Valve
Precision control

Precision control

Ensure safety

Precise control Safe and reliable

Bohao Valve
Precision control

Precision control

Ensure safety

Precise control Safe and reliable

Bohao Valve
boho valve

About BOHO

WHO

WE ARE

Learn more

Since 1998

Zhejiang BOHO Valve Machinery Co., Ltd., established in 1998, is a comprehensive enterprise integrating design, manufacturing, and sales of manual valve actuation devices. Located in Oubei Town, Wenzhou—a renowned "Pump and Valve Hometown" in China—the company currently boasts a factory area of 3,000㎡ and employs 60 dedicated team members, including 6 highly skilled technical professionals. The company’s flagship products include bevel gearboxes (fully reversible) and worm gearboxes (90° partial reversible), crafted from materials such as WCB and ductile iron. Meanwhile, valve stem nuts are available in options like brass, aluminum bronze, and D2 alloy. These products are widely used in various types of valves, including gate valves, globe valves, plug valves, ball valves, and butterfly valves. Driven by a business philosophy centered on superior management, advanced production technology, and customer-first service, the company continuously innovates to deliver high-quality products that have earned widespread acclaim from international clients. Today, its products are exported to over ten countries, including South Korea, Italy, India, the United States, Canada, and more.

Thank you very much for the continued support from our new and existing customers—we look forward to working together once again to build a brighter future.

2006 Year

Company establishment date

6000 Square meters

The company occupies a large area.

100 +

Product Specifications

60 +

Company employees

boho

Main Products

WHAT DO WE DO?

Specializing in the R&D and manufacturing of bevel gearboxes/worm gearboxes

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Jun 25,2019

The Difference Between Lug and Flanged Butterfly Valves

The clamp-style valve is more affordable, typically costing about two-thirds the price of a flanged valve. When selecting imported valves, opt for the clamp-style whenever possible—it’s not only cheaper but also lighter in weight. However, clamp-style valves feature longer bolt lengths, which demand higher precision during installation. If the flanges on either side become misaligned, the bolts will experience significant shear forces, increasing the risk of leakage. Additionally, in high-temperature applications, the extended bolts may expand under heat, potentially leading to leaks. Therefore, clamp-style valves are generally not recommended for large-diameter pipelines operating at elevated temperatures. Moreover, clamp-style butterfly valves are usually unsuitable for use at the pipeline’s end or in scenarios where downstream disassembly is required. This is because, once the downstream flange is removed, the clamp-style valve itself could fall off. To avoid this issue, an additional short section must be installed specifically for easy removal—a design challenge that doesn’t arise with flanged butterfly valves, though the latter come at a higher cost. In contrast, clamp-style butterfly valves lack flanges at both ends, featuring instead just a few导向螺栓孔. The valve connects to end flanges using a set of bolts and nuts. While this design makes disassembly simpler and reduces overall costs, it also means that if one sealing surface fails, both seals must be dismantled simultaneously. On the other hand, flanged butterfly valves have flanges at each end, allowing them to connect directly to pipe flanges. This design offers more reliable sealing performance, albeit at a significantly higher price point. Ultimately, choosing between the two depends on specific application needs and budget considerations.

Jun 25,2019

How does a stainless steel butterfly valve work?

  Stainless steel butterfly valves primarily consist of a valve body, stem, disc, and sealing ring. The valve body is cylindrical with a short axial length, housing the disc inside. These valves operate by rotating the disc—shaped like a circular plate—back and forth approximately 90° to open, close, or regulate the flow of the medium. When selecting a butterfly valve for precise flow control, it’s crucial to choose the right size and type to prevent inaccuracies in flow regulation. Stainless steel butterfly valves are suitable for controlling the flow of various fluids, including air, water, steam, corrosive media, slurry, oils, liquid metals, and even radioactive substances. In practice, these valves are categorized based on their operating pressure and temperature, though these conditions are somewhat limited by the inherent properties of stainless steel itself.

Jun 25,2019

Industrial Features of Stainless Steel Butterfly Valves

Stainless steel products are already widely used in everyday life, thanks to the unique properties of stainless steel that have enabled this material to be rapidly and extensively integrated into various applications. In fact, however, stainless steel has a longer history of industrial use. Today, Tianjin Butterfly Valve Manufacturer is here to share the key features of stainless steel butterfly valves in industrial production. 1. Organic substances like fruit juices, vegetable residues, noodle soup, or even bodily fluids such as mucus can adhere to the surface of stainless steel butterfly valves. In the presence of water and oxygen, these organic materials form organic acids, which, over time, may corrode the metal surface. 2. Dust particles containing other metallic elements or foreign metal fragments often accumulate on the valve’s surface. When exposed to humid air, condensation forms between these contaminants and the stainless steel, creating a micro-battery effect that triggers an electrochemical reaction. This process damages the protective oxide layer, leading to what’s known as electrochemical corrosion. 3. Acidic, alkaline, or saline substances—such as alkali solutions from wall renovations or lime-water splashes—can also stick to the valve surface, causing localized corrosion. 4. In polluted atmospheric conditions—especially those rich in sulfides, carbon oxides, or nitrogen oxides—condensation can lead to the formation of acidic or corrosive compounds like sulfuric acid, nitric acid, or acetic acid droplets. These chemicals can initiate chemical corrosion, further compromising the protective film on the stainless steel surface and ultimately leading to rust formation. Any of these scenarios can weaken the protective oxide layer on stainless steel, ultimately resulting in corrosion.

Your trusted partner—we’re always striving to deliver.

Specializing in the R&D and manufacturing of bevel gearboxes/worm gearboxes

boho valve

Outstanding quality

Years of experience in product quality management have become a valuable asset for the brand.

boho valve

Service First

One-on-one service with quick responses to resolve your issues.

boho valve

Peaceful Logistics

Years of collaboration with key logistics partners ensure your cargo arrives safely.

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boho valve

Address: Qinyuan Road, Zhujia Industrial Zone, Oubei Town, Wenzhou City, Zhejiang Province
Mobile phone:86-15868793566
Phone:86-577-57775050
Fax: 86-577-57779292
Email:boho@china-boho.com

boho valve
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