JIS 5K Cast Iron Screw-Down Check Valve | Low Pressure Dual Function Stop Check Valve

JIS 5K Cast Iron Screw-Down Check Valves

JIS 5K cast iron screw-down check valve integrates manual screw shut-off and automatic one-way anti-reflux dual functions in one compact structure. It adopts robust integral cast iron body with stable sealing performance, supporting long-term safe operation under standard 0.5MPa low-pressure working conditions.

Overview

Application:It is widely applied in low-pressure fresh water, circulating water and neutral fluid pipelines for industrial factories and municipal water supply systems. Effectively prevents fluid backflow and water hammer damage, ideal for conventional low-pressure piping requiring dual shut-off and protection functions.

Material Specification:

Part Name	Material	Code
1-Body	Cast Iron	FC20
2-Seat	Bronze	BC6
3-Disc	Bronze	BC6
4-Stem	Brass	C3771BD

Technical Specification:

Nominal Diameter (DN)	Test Pressure MPa [kgf/cm2]
Nominal Diameter (DN)	Body	Seat
300 or less	1.03 [10.5]	0.76 [7.7]
350 and 400	0.88 [9]	0.65 [6.6]
450 and over	0.74 [7.5]	0.54 [5.5]

Drawing:

Dimensions:

Size	L	D	C	No.	h	t	H	D₂	kg
50	100	130	105	4	15	16	240	160	12.9
65	115	155	130	4	15	18	255	180	18.2
80	130	180	145	4	19	18	265	180	23.4
100	150	200	165	8	19	20	310	224	33.7
125	170	235	200	8	19	20	330	250	46.2
150	190	265	230	8	19	22	380	280	63.4
200	220	320	280	8	23	24	450	315	105
250	275	385	345	12	23	26	540	355	166
300	310	430	390	12	23	28	610	400	243
350	360	480	435	12	25	30	690	500	327
400	395	540	495	16	25	30	770	630	459
450	440	605	555	16	25	30	835	630	618
500	485	655	605	20	25	32	915	710	800