Marine MD Series Wafer Butterfly Valve

About product

The Marine MD Series wafer butterfly valve is a type of valve used for controlling the flow of fluids in various applications. When comparing it to the YD series, there are a few notable differences:

  • Flange Connection: The MD Series wafer butterfly valve has a specific flange connection, which means it is designed to be connected using a specific type of flange.
  • Handle Material: The handle of the MD Series wafer butterfly valve is made of malleable iron.

MD Wafer Butterfly Valve Drawing

marine md series wafer butterfly valve

Additional information




DN 40~DN 1200


PN10/PN16/150 psi/200 psi

Face to face Standard

EN558-1 Series 20,API609

Flange Connection Standard

EN1092 PN6/10/16,ANSI B16.1,JIS 10K

Top Flange Standard

ISO 5211


Type A

Product Detail

Materials Of MD Series Wafer Butterfly Valve

Here are the materials used for different parts of the wafer butterfly valve:

  1. Body: The body of the wafer valve can be made of various materials, including Cast Iron (CI), Ductile Iron (DI), WCB (Carbon Steel), ALB (Aluminum Bronze), CF8 (Stainless Steel 304), and CF8M (Stainless Steel 316).
  2. Disc: The disc, which controls the flow by rotating inside the butterfly valve, can be made of different materials. These include Ductile Iron (DI), WCB (Carbon Steel), ALB (Aluminum Bronze), CF8 (Stainless Steel 304), CF8M (Stainless Steel 316), Rubber Lined Disc, Duplex stainless steel, and Monel.
  3. Stem: The stem is the part that connects the handle to the disc and controls its movement. It can be made of SS416, SS420, SS431, or 17-4PH (Precipitation Hardening Stainless Steel).
  4. Seat: The seat forms a seal between the disc and the body when the valve is closed. The materials used for the seat include NBR (Nitrile Butadiene Rubber), EPDM (Ethylene Propylene Diene Monomer), Viton (Fluoroelastomer), and PTFE (Polytetrafluoroethylene).
  5. Taper Pin: The taper pin is used to secure the disc to the stem. The materials used for the taper pin are SS416, SS420, SS431, or 17-4PH.

The Working Temperature Of MD Wafer Valve

The working temperature range for the MD Series wafer butterfly valve depends on the type of liner used. Here are the working temperature ranges for different liners:

  • EPDM Liner: The working temperature range for the wafer valve with an EPDM (Ethylene Propylene Diene Monomer) liner is -45℃ to +135℃.
  • NBR Liner: The working temperature range for the valve with an NBR (Nitrile Butadiene Rubber) liner is -12℃ to +82℃.
  • PTFE Liner: The working temperature range for the wafer butterfly valve with a PTFE (Polytetrafluoroethylene) liner is +10℃ to +150℃.

Marine MD Series Wafer Butterfly Valve Parameter

marine md series wafer butterfly valve

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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