Marine Cast Steel 20K Angle Screw Down Check Valve JIS F7474:
China Marine Cast Steel 20K Angle Screw Down Check Valve JIS F7474:
Marine Cast Steel Angle Screw Down Check Valve is called marine angle SDNR valve for short, also can be called marine angle check valve, angle non return valve, suitable for fresh water, air & other gas, oil and steam pipe lines, used to shut off/turn on the medium, adjust the flow rate and prevent the medium black flow.
Technical Specification:
1.Design & Manufacturing Standard: JIS F7374-1996
2. Inspection & Test Standard: JIS 7400-1996
3. Watertight Test Pressure: Body-5.1Mpa, Seat-3.74Mpa~1.0Mpa
4. Flange Standard: JIS B2220 -20k
Max Working Pressure:
| Fluid Condition | Max Working Pressure（Mpa) |
| Steam of 400℃ | 2.3 |
| Steam of 350℃ | 2.6 |
| Steam of 300℃ | 2.9 |
| Steam of 200℃ or less | 3.1 |
| Air,gas,oil and pulsation water | 3.1 |
| Non-shock water of 120℃ or less | 3.4 |
Main Material:
1-Body:Cast Steel
2-Seat:Stainless Steel
3-Disc: Stainless Steel
4-Stem: Stainless Steel
5-Bonnet: Cast Steel
6-Handwheel: Cast Iron
7-Packing Gland: Stainless Steel
8-Gasket: non-asbestos
Main Size List(mm)：
IMPA CODE
Size
L1
D
C
No of Bolt Hole
h
t
H
D2
Weight(kgs)
751246
32
100
135
100
4
19
18
270
160
13
751247
40
1110
140
105
4
19
18
290
160
15.2
751248
50
125
155
120
8
19
18
305
200
20
751249
65
135
175
140
8
19
20
345
224
26.9
751250
80
150
200
160
8
23
22
385
250
38.9
751251
100
170
225
185
8
23
24
440
280
54.4
751252
125
200
270
225
8
25
26
500
315
79.9
751253
150
225
305
260
12
25
28
550
355
111
751254
200
280
350
305
12
25
30
630
450
181
751255
250
310
430
380
132
27
34
725
560
283
| IMPA CODE | Size | L1 | D | C | No of Bolt Hole | h | t | H | D2 | Weight(kgs) |
| 751246 | 32 | 100 | 135 | 100 | 4 | 19 | 18 | 270 | 160 | 13 |
| 751247 | 40 | 1110 | 140 | 105 | 4 | 19 | 18 | 290 | 160 | 15.2 |
| 751248 | 50 | 125 | 155 | 120 | 8 | 19 | 18 | 305 | 200 | 20 |
| 751249 | 65 | 135 | 175 | 140 | 8 | 19 | 20 | 345 | 224 | 26.9 |
| 751250 | 80 | 150 | 200 | 160 | 8 | 23 | 22 | 385 | 250 | 38.9 |
| 751251 | 100 | 170 | 225 | 185 | 8 | 23 | 24 | 440 | 280 | 54.4 |
| 751252 | 125 | 200 | 270 | 225 | 8 | 25 | 26 | 500 | 315 | 79.9 |
| 751253 | 150 | 225 | 305 | 260 | 12 | 25 | 28 | 550 | 355 | 111 |
| 751254 | 200 | 280 | 350 | 305 | 12 | 25 | 30 | 630 | 450 | 181 |
| 751255 | 250 | 310 | 430 | 380 | 132 | 27 | 34 | 725 | 560 | 283 |
