Ship Stop Check Valve

GB/T 1853-2008 Ship Cast Steel Stop Check Valve – Dual-Function Flow Control for Marine Applications

Product Overview
The GB/T 1853-2008 Ship Cast Steel Stop Check Valve is a premium dual-function valve designed for critical marine applications in both seawater and freshwater systems. Combining the positive shutoff capability of a stop valve with automatic backflow prevention, this robust valve features cast steel construction with bronze internals for superior corrosion resistance. With a 0.6MPa pressure rating and comprehensive size range from DN40 to DN350, it delivers reliable performance in the most demanding marine environments.

Key Features & Benefits

✔ Dual-Function Design

Positive Shutoff: Manual stop valve functionality for absolute flow control
Backflow Prevention: Automatic check valve feature for system safety
Reliable Operation: Ensures uninterrupted marine system performance

✔ Premium Material Construction

Body & Cover: High-grade cast steel for structural integrity and pressure containment
Disc & Seat: Cast tin bronze for superior corrosion resistance and sealing
Stem: Aluminum bronze for smooth operation and durability
Custom Materials: Special alloys available upon customer request

✔ Technical Excellence

Pressure Rating: 0.6MPa for marine applications
Size Range: DN40 to DN350 comprehensive coverage
Media Compatibility: Seawater, freshwater, and various marine fluids
Standard Compliance: Meets GB/T 1853-2008 specifications

✔ Quality Assurance

Sample availability for quality verification
Excellent manufacturing quality with aesthetic design
Custom manufacturing options available

Ship Stop Check Valve Technical Specifications

Type A & Type B Configuration:

DN (mm)	A	B	H	L	L1	t	D	D1	D2	d0	b	n	Th	D0	S	Weight (kg)
40	300	200	326	90	90	6	125	93	74	15	13	6	M14	120	11	7.8
50	218	230	383	95	95	7	135	103	84	15	13	6	M14	140	12	10.8
65	348	290	430	115	115	7	155	123	104	15	14	6	M14	140	12	16.3
80	390	310	474	125	125	7	170	138	118	15	14	8	M14	160	14	21.6
100	414	350	498	150	135	8	190	158	138	15	14	8	M14	180	14	29.7
125	466	400	561	175	155	8	215	183	164	16	14	10	M14	200	17	39.5
150	528	480	616	180	160	9	240	208	190	16	14	12	M14	200	17	54.8
200	736	600	829	215	215	10	295	264	247	16	15	12	M14	280	22	89.0
250	858	730	986	250	250	11	365	327	306	18	16	14	M16	320	27	139.4
300	1015	850	1160	300	300	12	430	386	360	22	19	14	M20	400	27	192.6
350	1065	980	1210	320	320	12	480	436	410	22	28	16	M20	450	32	230.9

Type AS & Type BS Configuration:
| DN (mm) | AS | BS | H | L | L1 | t | D | D1 | D2 | d0 | b | n | Th | D0 | S | Weight (kg) |
|———|—-|—-|—|—|—|—|—|—|—|—|—|—|—|—|—|—|—|
| 40 | 300 | 200 | 326 | 115 | 115 | 6 | 130 | 100 | 80 | 14 | 16 | 4 | M12 | 120 | 11 | 8.2 |
| 50 | 218 | 230 | 383 | 125 | 125 | 7 | 140 | 110 | 90 | 14 | 16 | 4 | M12 | 140 | 12 | 12.8 |
| 65 | 348 | 290 | 430 | 145 | 145 | 7 | 160 | 130 | 110 | 14 | 16 | 4 | M12 | 140 | 12 | 19.5 |
| 80 | 390 | 310 | 474 | 155 | 155 | 7 | 190 | 150 | 128 | 18 | 18 | 4 | M16 | 160 | 14 | 24.9 |
| 100 | 414 | 350 | 498 | 175 | 175 | 8 | 210 | 170 | 148 | 18 | 18 | 4 | M16 | 180 | 14 | 32.65 |
| 125 | 466 | 400 | 561 | 200 | 200 | 8 | 240 | 200 | 178 | 18 | 20 | 8 | M16 | 200 | 17 | 45.8 |
| 150 | 528 | 480 | 616 | 225 | 225 | 9 | 265 | 225 | 202 | 18 | 20 | 8 | M16 | 200 | 17 | 59.8 |
| 200 | 736 | 600 | 829 | 275 | 275 | 10 | 320 | 280 | 258 | 18 | 22 | 8 | M16 | 280 | 24 | 97.1 |
| 250 | 858 | 730 | 986 | 325 | 325 | 11 | 375 | 335 | 316 | 18 | 24 | 12 | M16 | 320 | 27 | 148.4 |
| 300 | 1015 | 850 | 1160 | 375 | 375 | 12 | 440 | 395 | 365 | 22 | 24 | 12 | M20 | 400 | 27 | 201.7 |
| 350 | 1065 | 980 | 1210 | 425 | 425 | 12 | 490 | 445 | 415 | 22 | 24 | 12 | M20 | 450 | 32 | 239.9 |

Applications & Industries