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Home > Industrial Equipment & Components > Valve > Ball Valve > Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem thumbnail-3

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem thumbnail-4

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Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem photo-1

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem photo-2

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem photo-3

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem photo-4

Three-Piece DIN 3357 Marine Ball Valve, Flanged, With Blow-Proof Stem photo-5

Product Spotlights

Engineered for marine & industrial safety, this DIN 3357 ball valve features a critical blow-proof stem to prevent hazardous ejection. Its three-piece flanged design enables easy in-line maintenance, reducing downtime. Built with corrosion-resistant materials like stainless steel and offering versatile actuation, it ensures reliable, long-lasting performance in harsh environments. ISO9001 certified manufacturing supports consistent quality for global projects.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Standard:

DIN 3357

Body Construction:

Three-piece flanged design

Stem Type:

Blow-proof stem

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Standard DIN 3357

Body Construction Three-piece flanged design

Stem Type Blow-proof stem

Connection Type Flanged ends

Primary Application Marine and industrial fluid systems

Valve Type Ball valve

Material Options Carbon steel, stainless steel, etc.

Seat Material PTFE, reinforced PTFE, metal

Operation Lever, gearbox, or pneumatic/hydraulic actuator

As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance fluid control solutions for demanding global markets. Our Three-Piece DIN 3357 Marine Ball Valve with a flanged connection and blow-proof stem is engineered to deliver exceptional reliability and safety in critical marine and industrial applications. This valve is designed to meet the rigorous standards required for offshore platforms, shipboard piping, and other harsh environments where failure is not an option. We combine robust construction with precise engineering to ensure long service life and minimal maintenance, offering our clients a dependable component for their most vital systems.

This valve stands out due to its specific design features tailored for performance and safety:

Three-Piece Flanged Body: This construction allows for easy installation, maintenance, and inline servicing without requiring the entire valve to be removed from the pipeline, significantly reducing downtime.
DIN 3357 Standard Compliance: Manufactured to conform with DIN 3357 standards, ensuring dimensional interchangeability, reliable performance, and broad acceptance in international markets, particularly in Europe and regions adopting European specifications.
Blow-Proof Stem Design: A critical safety feature that prevents the stem from being ejected under extreme internal pressure, protecting personnel and equipment. The stem is securely retained even if the packing gland is loosened or the seal is compromised.
Superior Sealing: Utilizes high-quality seat materials such as PTFE or reinforced polymers, providing a bubble-tight seal and excellent chemical resistance against a wide range of media, from seawater to oils and chemicals.
Robust Construction: Available in materials like carbon steel with protective coatings or stainless steel (e.g., CF8, CF8M) to withstand corrosive marine atmospheres and extend service life.
Versatile Actuation: Can be operated manually with a lever or through a gearbox for high-torque applications. It is also readily adaptable for automated control with pneumatic or hydraulic actuators, facilitating integration into modern control systems.

Detailed technical specifications are presented in the table below. Please note that specific dimensions, pressure ratings, and material grades are customizable based on project requirements.

Parameter	Specification / Options
Design Standard	DIN 3357
Nominal Pressure (PN)	PN16, PN25, PN40 (Customizable)
Size Range (DN)	DN15 (1/2") to DN300 (12")
Body Material	WCB Carbon Steel, CF8 (304 SS), CF8M (316 SS), Others upon request
Ball Material	Chrome-plated steel, Stainless Steel
Stem Material	Stainless Steel (e.g., SS304, SS316) with blow-proof design
Seat Material	PTFE, Reinforced PTFE, PEEK, Metal Seats (for high temp)
Temperature Range	-20°C to +200°C (varies with seat material)
End Connection	Flanged as per DIN EN 1092-1 (PN series) or other standards
Operation	Lever, Gear Operator, Pneumatic/Hydraulic Actuator (Optional)

The benefits of choosing this valve for your projects are clear:

Enhanced Safety: The blow-proof stem is a non-negotiable feature for high-pressure or safety-critical applications, mitigating a significant operational hazard.
Reduced Lifecycle Cost: The three-piece design facilitates easy maintenance and seal replacement, minimizing total cost of ownership over the valve's lifespan.
Global Compatibility: Adherence to DIN standards ensures the valve fits seamlessly into existing European-specification systems and is widely accepted by international engineering firms.
Operational Flexibility: Suitable for on/off and throttling services in a variety of media, including water, oil, gas, and mild chemical solutions.
Durability in Harsh Conditions: Constructed from materials selected to resist corrosion, erosion, and mechanical wear common in marine and offshore environments.

Shanghai Zhibang's commitment to quality is backed by our ISO9001 certification, ensuring consistent manufacturing processes and product reliability. With an annual export value ranging between US$1 Million and US$1.5 Million, we have successfully supplied our valves to diverse markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Europe. Our strategic location in Shanghai allows for efficient logistics through major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery worldwide. When you choose our Three-Piece DIN 3357 Marine Ball Valve, you are not just purchasing a component; you are investing in a solution backed by proven manufacturing expertise, a commitment to international standards, and a track record of global customer satisfaction. Contact us today to discuss your specific requirements and receive a competitive quotation.

Frequently Asked Questions (FAQ)

Q: What is the primary advantage of a three-piece design over a one-piece ball valve?
A: The three-piece design features a center section (containing the ball and seats) that can be removed independently. This allows for easy inspection, cleaning, and seal replacement without disconnecting the valve body from the pipeline flanges, drastically simplifying maintenance.
Q: How does the "blow-proof" stem mechanism work, and why is it important?
A: The stem incorporates a shoulder or a retaining ring below the handle/actuator mounting point. In the event of excessive internal pressure or packing failure, this mechanical stop prevents the stem from being forcibly ejected out of the valve body, a critical safety feature to protect operators.
Q: Is this valve suitable for use with seawater?
A: Yes, when ordered with appropriate materials. We recommend body materials like ASTM A351 CF8M (316 stainless steel) and internal components compatible with chloride environments to ensure optimal corrosion resistance for seawater service.
Q: Can this valve be automated?
A: Absolutely. The valve is designed with a standard ISO mounting pad on the stem, making it directly compatible with a wide range of pneumatic (single/double-acting) or hydraulic actuators and electric actuators for automated on/off or modulating control.
Q: What flange facing standards do you offer?
A: Our standard flanges conform to DIN EN 1092-1 (Form B1, raised face). However, we can supply valves with other flange standards such as ASME B16.5, JIS, or BS upon request to match your existing piping specifications.
Q: What is the typical lead time for an order of these valves?
A: Lead times vary based on size, material, and quantity. For standard configurations in moderate quantities, production typically takes 4-6 weeks. We provide accurate lead time estimates with every quotation.
Q: Do you offer fire-safe certified versions of this valve?
A: Fire-safe design is available as an option. This typically involves secondary metal seals that maintain sealing integrity in the event the primary soft seals are damaged by fire, meeting standards like API 607 or ISO 10497.
Q: What kind of testing do your valves undergo before shipment?
A: Each valve undergoes rigorous factory testing, which generally includes a hydrostatic shell test (at 1.5x the rated pressure) and a seat leakage test (per API 598 or equivalent standards) to ensure it meets specified performance criteria.