Product Description
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Marine Butterfly Valve - Definition & Function
A marine butterfly valve is a quarter-turn rotary valve used in shipboard piping systems to control or isolate fluid flow (water, fuel, oil, air, etc.). It consists of a circular disc mounted on a rotating shaft, which opens/closes by turning 90 degrees.
Key Features of Marine Butterfly Valves
1. Design & Operation
- Disc: A flat or slightly angled circular plate (often rubber-coated for sealing).
- Stem/Shaft: Rotates the disc 90° (from fully open to closed).
- Seat: Resilient liner (e.g., EPDM) ensures watertight closure.
- Actuation: Manual (lever/handwheel), pneumatic, hydraulic, or electric.
2. Why Ships Use Butterfly Valves
- Compact & Lightweight: Saves space vs. gate/globe valves (ideal for tight engine rooms).
- Quick Operation: 90° turn for full open/close (critical for emergencies).
- Low Pressure Drop: Minimal flow obstruction when fully open.
- Corrosion Resistance: Materials like bronze, stainless steel, or coated ductile iron withstand seawater.
3. Common Marine Applications
- Seawater cooling systems
- Ballast & bilge water management
- Fuel/oil transfer lines
- HVAC & compressed air systems
Butterfly Valve vs. Other Marine Valves
| Valve Type |
Operation |
Best for Marine Use When... |
| Butterfly Valve |
90° rotary motion |
Space-saving, moderate-pressure flow control |
| Gate Valve |
Linear (up/down) |
Full-bore flow, minimal pressure drop |
| Globe Valve |
Linear (screw stem) |
Precise throttling (e.g., steam lines) |
| Check Valve |
Automatic (no-touch) |
Preventing backflow (e.g., bilge pumps) |
Pros & Cons in Marine Environments
Pros:
- Fast actuation (critical for firefighting or flooding emergencies).
- Low maintenance (fewer parts than gate/globe valves).
- Cost-effective for large diameters.
Cons:
- Not ideal for high-pressure throttling (may cause seat wear).
- Partial opening can create cavitation in high-velocity flows.
Need help selecting a butterfly valve for a specific system? Ask about materials, pressure ratings, or actuator types!
Company Profile
Qingdao Hongfeng Xianglong Valve Manufacturing Co., Ltd. is a professional marine valve manufacturing enterprise located in Mingcun Town, Pingdu City, Qingdao, China. We mainly produce marine valves and accessories like gate valve, globe valve, stop valve,check valve, stop-check valve, butterfly valve, ball valve, storm valve with Japanese, German, and national standards. Providing customers with high-quality and efficient products and services is our business philosophy, which we have always followed and continuously developed over the years.
The company's predecessor has been deeply involved in railway parts for 16 years, with rich processing technology and advanced processing equipment. It has an experienced professional team that can carry out specialized production from product design, mold development, product casting, processing, assembly, and testing. High quality products have won us the trust of customers, and good service has established a long-term cooperative relationship.
The company's factory has complete production and equipment, with an 8000 square meter production workshop and around 60 employees. It has a complete management team and management process, equipped with processing workshops, assembly workshops, pressure testing workshops, painting workshops, and complete valve production equipment such as lathes, milling machines, CNC machines, drilling machines, valve sealing test benches, and painting assembly lines. While ensuring internal quality, it provides customers with the shortest delivery time.
Workshop
Packaging & Shipping
FAQ
Q: Are you trading company or manufacturer ?
A: We are manufacturer in PingDu city, Qingdao city, China.
Q: What's your product range?
A: We produce marine valves, like gate valve, check valve, stop valve, stop-check valve, globe valve, ball valve, butterfly valve and accessories .
Q: What's Execution Standard?
A:JIS/GB/DIN/BS etc.
Q: What's your Strong product ?
A: Gate valve.
Q: How long is your delivery time?
A: Normally it is 3 days if the goods are in stock. or it is 35 days if the goods are not in stock, it is based on the quantity.
Q: Do you provide samples ?
A: Yes, we could offer the sample.
Q: What is your terms of payment ?
A: 30% deposit in advance and balance before shipment.
Q: What's the packing?
A: Plywood packing.
Q: Can I have my own logo on the products?
A: Yes, you can send us the drawing and we can make it.
Q: Can you produce the products based on my own drawing?
A: Yes.
Q: Which price terms can be accepted?
A: FOB,CIF etc.
Our Advantages
(1)Own production line and workshop to do all processes so can save cost and offer you competitive price.
(2)Own workshop to control schedule more flexibly.
(3)We can assure quality in every process in production line.
(4)Class Approval Certifications.
(5)Quality guarantee after sale.
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