Marine UD Series Hard Seated Butterfly Valve

About product

The Marine UD Series Hard Seated Butterfly Valve is designed with user-friendly features to facilitate installation, replacement, and maintenance. This butterfly valve is designed in a wafer pattern with flanges, it incorporates correcting holes on the flange, following standard guidelines, which make it easy to correct alignment during installation. The valve offers the choice between a through-bolt or a one-side bolt configuration, allowing for effortless replacement and maintenance.

Additionally, this wafer valve is available with seat options such as phenolic-backed or aluminum-backed seats. These seats are non-collapsible, stretch-resistant, blowout-proof, and can be field-replaced when needed. These features enhance the overall convenience and reliability of the UD series hard-seated wafer valve in marine applications.

Additional information


DN100~DN 2000


PN10/PN16/150 psi/200 psi



Face to face

EN558-1 Series 20,API609

Product Detail

Wafer Valve For Sale – UD Series Hard-Seated Butterfly Valve

The Marine UD Series Hard Seated Butterfly Valve differs from the soft sleeve type in several ways.

Firstly, the hard-seated wafer valve does not utilize a soft sleeve for sealing. Instead, it features a durable, rigid seat material, such as phenolic-backed or aluminum-backed seats. These seats are non-collapsible, stretch-resistant, and blowout-proof, providing reliable sealing even under high-pressure conditions.

Secondly, the installation process differs. The hard-seated wafer valve typically incorporates correcting holes on the flange, allowing for easy correction during installation to ensure proper alignment and positioning.

Thirdly, the maintenance and replacement process is simplified in the hard-seated valve. It can be designed with either a through-bolt or a one-side bolt configuration, enabling easy replacement and maintenance procedures.

Marine UD Series Hard Seated Butterfly Valve Parameter

marine ud series hard seated butterfly valve


DN7503066056016774466726914.424-353002544-1 1/4-7UNC-2B63.3598424-1 1/4-7UNC-2B8-182871.3518480
DN90036720656203864.71188411085.828-41.33002544-1 1/2-6UNC-2B75116828-1 1/2-6UNC-2B8-18348420728
DN10504285877725110301509991257.332-41.33002544-1 1/2-6UNC-2B95134632-1 1/2-6UNC-2B8-183510525976
DN120048941864276116015011271422.440-41.33502984-1 1/2-6UNC-2B105151140-1 1/2-6UNC-2B8-2235117281374
Know Who We Are

About our company

Zava Marine Corporation is a leading supplier of marine parts and components. With a strong focus on quality and customer satisfaction, we specialize in providing a comprehensive range of high-quality marine equipment and accessories. Our products include deck equipment, ship accessories, and various other essential components needed for smooth maritime operations.

With a global presence, we serve a diverse customer base, including shipbuilders, shipowners, offshore operators, and marine equipment distributors. We are committed to providing exceptional service and tailored solutions to meet our customers’ unique needs.


Zava Marine offers a comprehensive range of certifications for marine parts in accordance with international standards and regulations. These certifications include those provided by renowned marine classification societies such as Lloyd’s Register (LR), Bureau Veritas (BV), China Classification Society (CCS), Registro Italiano Navale (RINA), American Bureau of Shipping (ABS), Nippon Kaiji Kyokai (NK), and Det Norske Veritas – Germanischer Lloyd (DNV-GL). By collaborating with these esteemed societies, Zava Marine ensures that our certified marine parts meet the highest standards of safety, quality, and performance, instilling confidence in our reliability and compliance within the maritime industry.

The warranty provided by Zava Marine covers defects in materials and workmanship for a period of two years from the date of purchase. During this warranty period, if any marine parts purchased from Zava Marine exhibit issues or failures resulting from manufacturing defects or faulty materials, Zava Marine will take responsibility for repair or replacement of the affected parts. 

Zava Marine has recently opened new molds for European and North American clients, utilizing materials such as metal, ABS, PVC, and more. These successful mold opening projects allow us to provide customized marine parts and components that meet the specific requirements of our clients in these regions.

Typically, Zava Marine can ship samples within 7 days once the product drawing has been mutually confirmed by both parties. This efficient process ensures that customers can receive samples promptly, allowing them to assess the quality and suitability of the products.

Zava Marine frequently utilizes a wide range of materials in our projects. These materials include aluminum, stainless steel, carbon steel, copper, plastics, titanium, and PEEK (Polyether Ether Ketone). Each material offers unique properties and characteristics suitable for various marine applications. 

Yes, we provide customization services for marine parts. We understand that every project and application may have unique requirements, and we are committed to delivering tailored solutions. By collaborating closely with our clients, we can adapt our products to specific specifications, ensuring optimal fit, performance, and compatibility. Whether it’s modifying existing designs or creating entirely new parts, our customization services cater to the diverse needs of the maritime industry.

Absolutely! We offer product design and development services to support our clients’ needs. Our experienced team of engineers and designers can collaborate with clients from concept development to final product realization. By leveraging our expertise in marine engineering and design, we can provide valuable insights and innovative solutions. Whether it’s optimizing existing designs or creating entirely new products, we are equipped to assist clients in bringing their ideas to life efficiently and effectively.

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