JIS F7377 Marine SDNR Valve

The primary function of a screw-down non-return valve is to allow fluid flow in one direction while preventing it from flowing back in the opposite direction. This helps maintain pressure and control the flow of fluids within marine systems.

Overview

Introduction:

Marine screw-down non-return valves are often constructed from materials such as stainless steel, bronze, cast iron, cast steel or other corrosion-resistant materials suitable for marine environments. This ensures durability and longevity, even in harsh marine conditions.

These valves are commonly used in various marine systems, including ship piping systems, ballast systems, bilge systems, and cooling water systems. They play a crucial role in maintaining the integrity and efficiency of these systems by preventing unwanted backflow.

Drawing:

MAIN DIMENSIONS
Size	L	D	C	No.	h	t	H	D2	Kg
50	210	130	105	4	15	16	270	160	14.7
65	250	155	130	4	15	18	300	180	21.3
80	280	180	145	4	19	18	310	180	27.7
100	340	200	165	8	19	20	360	224	40.8
125	410	235	200	8	19	20	390	250	57.6
150	480	265	230	8	19	22	445	280	80.3
200	570	320	280	8	23	24	530	315	139
250	740	385	345	12	23	26	650	355	216
300	840	430	390	12	23	28	740	400	346
350	940	480	435	12	25	30	840	500	418
400	1050	540	495	16	25	30	940	630	600