Marine Straight Diaphragm Valve – Reliable Flow Control for Ship Piping

Introducing our high-quality straight diaphragm valve, designed specifically for demanding marine shipboard applications. As a key component in vessel piping systems, this valve offers precise flow control and reliable shut-off for a wide range of media, including seawater, freshwater, oils, and light chemicals. Its straight-through design minimizes pressure loss and allows smooth, uninterrupted flow, making it an ideal choice for engine room, bilge, ballast, and cooling water lines.

Crafted from robust materials such as cast iron and stainless steel, this marine-grade diaphragm valve is built to withstand the corrosive effects of saltwater and harsh marine environments. The flexible diaphragm ensures a bubble-tight seal against the valve body, preventing leakage and contamination. With easy maintenance and replaceable diaphragms, this valve offers long service life and reduced downtime. Choose from various sizes and connection types to suit your specific vessel requirements.

Key Features

Technical Specifications

SpecificationDetails
Valve TypeStraight Diaphragm Valve
Size RangeDN15 - DN100 (1/2" - 4")
Pressure RatingPN10 / PN16
Temperature Range-10°C to +80°C (dependent on diaphragm material)
Body MaterialCast Iron, Ductile Iron, Stainless Steel
Diaphragm MaterialEPDM, PTFE, Nitrile
Connection TypeFlanged, Threaded
Applicable MediaSeawater, Freshwater, Oil, Chemicals
Standards ComplianceAvailable upon request

Frequently Asked Questions

What is a straight diaphragm valve used for?

Straight diaphragm valves are used for on/off and throttling control of fluids in piping systems. In marine applications, they are commonly employed in seawater cooling lines, bilge systems, ballast water management, and chemical handling circuits where a leak-proof seal is critical.

What diaphragm materials are available?

We offer EPDM, PTFE, and Nitrile diaphragms. EPDM provides excellent resistance to seawater and weather; PTFE is ideal for aggressive chemicals and high temperatures; Nitrile is suitable for oil and fuel applications.

Can this valve handle seawater?

Yes, the straight diaphragm valve is specifically designed for marine environments. The combination of a corrosion-resistant body (cast iron or stainless steel) and an EPDM or PTFE diaphragm ensures reliable performance in seawater service.

What is the maximum pressure rating?

The valve is rated for PN10 or PN16 depending on size and material configuration. For specific pressure requirements, please contact our technical sales team.

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