Marine butterfly valve V type JIS 5K/10K

As a core control component of marine pipeline systems, marine butterfly valves are widely recognized for their compact structure, lightweight design, fast opening and closing speed, low flow resistance and excellent corrosion resistance. Capable of adapting to diverse media including seawater, fresh water, fuel oil and sewage, they serve critical marine piping systems and have become the mainstream valve solution for modern shipbuilding.

Product Details

Technical Specifications & Pressure Test

Pressure test		5K	10K
Shell		7.5bar	15bar
Seal	Water	5.5bar	11bar
	Air	6bar	6bar
Working Temperature		-20~120℃

Material List

No.	Part Name	Materials
1	Body	DI
2	Bottom shaft	SS410
3	Disc	CF8
4	Upper shaft	SS410
5	Seat	EPDM
6	Bushing	Polymer
7	O ring	EPDM
8	Wormgear	DI

Dimensions Data (mm)

DN	L	A	B	∅E	∅F	n-∅d1	5K			10K
DN	L	A	B	∅E	∅F	n-∅d1	ØD	ØD1	n-Ød	∅D	∅D1	N-∅d
50	40	130	83	65	50	4-∅8	130	105	4-15	155	120	4-19
65	40	140	93	65	50	4-∅8	155	130	4-15	175	140	4-19
80	60	149	100	65	50	4-∅8	180	145	4-19	185	150	8-19
100	60	156	110	90	70	4-∅10	200	165	8-19	210	175	8-19
125	60	177	125	90	70	4-∅10	235	200	8-19	250	210	8-23
150	70	200	143	90	70	4-∅10	265	230	8-19	280	240	8-23
200	80	225	170	125	102	4-∅12	320	280	8-23	330	290	12-23
250	90	280	203	125	102	4-∅12	385	345	12-23	400	355	12-25
300	90	309	230	125	102	4-∅12	430	390	12-23	445	400	16-25
350	100	325	260	125	102	4-∅12	480	435	12-25	490	445	16-25
400	110	371	290	175	140	4-∅18	540	495	16-25	560	510	16-27
450	130	392	330	175	140	4-∅18	605	555	16-25	620	565	20-27
500	140	431	358	175	140	4-∅18	655	605	20-25	675	620	20-27

Typical Marine Application Scenarios

1. Ballast Water System

As one of the most widely applied scenarios, the ballast water system transports sediment-laden seawater under normal temperature and low pressure. Concentric wafer-type soft seal butterfly valves with EPDM seals and 316L stainless steel or ductile iron valve bodies are primarily adopted to balance cost, corrosion resistance and sealing performance. Large-diameter main pipelines are equipped with double eccentric butterfly valves for enhanced stability.

2. Seawater and Fresh Water Cooling System

Affected by strong seawater corrosion and medium pressure, this system mainly uses double eccentric soft seal butterfly valves with aluminum bronze or 316L stainless steel valve bodies to ensure long-term stable heat exchange and cooling efficiency.

3. Bilge and Sewage System

Facing media containing oil stains and impurities, the system adopts concentric soft seal butterfly valves with oil-resistant NBR/EPDM seals, featuring good anti-fouling performance and convenient daily maintenance.

4. Marine Fire-fighting System

Requiring rapid emergency switching and reliable tightness, flange-type soft seal butterfly valves with epoxy-coated ductile iron are applied to resist pipeline vibration and ensure safe and efficient water supply in emergency situations.

5. Fuel and Lubricating Oil System

For flammable and explosive oil media, double eccentric metal hard seal or FKM soft seal butterfly valves are selected to meet fireproof, high-temperature resistant and safe cut-off requirements.

6. Ventilation and HVAC System

Lightweight concentric wafer-type butterfly valves are widely used for air volume regulation and pipeline isolation, thanks to their low flow resistance and space-saving installation advantages.

7. Special Extreme Working Conditions

Triple eccentric metal hard seal butterfly valves are applied to high-temperature flue gas and desulfurization systems, while food-grade sanitary butterfly valves are used for ship domestic fresh water systems to meet hygiene standards.