Ductile Iron Body-Ductile Iron Disc 300X Slow Closure Check Valve
Product Introduction
The Ductile Iron Body-Ductile Iron Disc 300X Slow Closure Check Valve is engineered to eliminate water hammer and prevent backflow. Featuring an all-ductile iron (GGG50/ASTM A536) construction with hydraulic slow-close mechanism, it achieves two-stage closure (fast + slow) to mitigate pressure surges. Ideal for pump stations, municipal water supply, and high-flow industrial systems, it operates at 0℃ to 80℃ with PN16/ANSI 150 pressure, compatible with DN80-DN800 pipelines.
Product Advantages
- Pipeline Protection: Mitigates pump shutdown-induced shocks to prevent pipe failures.
- Long-Term Seal Integrity: NBR-coated disc compensates wear, achieving ≥8-year backflow prevention in water systems.
- Installation Flexibility: Compatible with horizontal/vertical orientations; flanges meet GB/T 17241 standards.
- Cost Efficiency: No electronics reduces failure risks; hydraulic oil chamber requires zero maintenance.
Product Features
Dual-Speed Closure
70% fast closure followed by 30% slow closure (3-60s adjustable), reducing water hammer peaks by >50%.
01
Double Sealing System
Ductile iron disc with NBR coating ensures rigid sealing under forward flow and elastic sealing against backflow (ANSI Class IV leakage).
02
Impact Resistance
Ductile iron structure withstands ≥1.6MPa tensile strength and >100,000 water hammer cycles.
03
Self-Powered Function
Hydraulic mechanism operates solely on media pressure, requiring no external power.
04
Field Serviceability
Split bolted bonnet allows seal replacement and closure time adjustment without pipeline disassembly.
05
|
DN (mm) |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
|
|
L |
180 |
180 |
180 |
203 |
203 |
215 |
241 |
292 |
330 |
356 |
450 |
500 |
560 |
630 |
700 |
780 |
850 |
980 |
|
|
PN10 |
D |
105 |
115 |
135 |
145 |
160 |
180 |
195 |
215 |
245 |
280 |
335 |
390 |
440 |
500 |
565 |
615 |
670 |
780 |
|
D1 |
75 |
85 |
100 |
110 |
125 |
145 |
160 |
180 |
210 |
240 |
295 |
350 |
400 |
460 |
515 |
565 |
620 |
725 |
|
|
PN16 |
D |
105 |
115 |
135 |
145 |
160 |
180 |
195 |
215 |
245 |
280 |
335 |
405 |
460 |
520 |
580 |
640 |
705 |
840 |
|
D1 |
75 |
85 |
100 |
110 |
125 |
145 |
160 |
180 |
210 |
240 |
295 |
355 |
410 |
470 |
525 |
585 |
650 |
770 |
|
|
PN25 |
D |
105 |
110 |
135 |
145 |
160 |
180 |
195 |
230 |
270 |
300 |
360 |
425 |
485 |
550 |
610 |
660 |
730 |
840 |
|
D1 |
75 |
85 |
100 |
110 |
125 |
145 |
160 |
190 |
220 |
250 |
310 |
370 |
430 |
490 |
550 |
600 |
660 |
770 |
|
|
H |
172 |
172 |
172 |
265 |
265 |
310 |
350 |
460 |
520 |
570 |
695 |
780 |
905 |
1025 |
1080 |
1030 |
1135 |
1270 |
|
|
H1 |
106 |
106 |
106 |
210 |
210 |
215 |
245 |
305 |
365 |
415 |
510 |
560 |
658 |
696 |
735 |
610 |
665 |
725 |
|
Technical Parameters
|
Size |
DN32-DN600 |
DN650-DN2000 |
|
Working pressure |
16Bar |
10Bar |
|
Shell |
24Bar |
15Bar |
|
Seal |
18Bar |
11Bar |
|
Operating Temperature |
-45°C~+150°C |
|
|
Operating Environment |
Ballast and bilge system Chemical processing Desalination plants |
|
|
Driving Method |
Hand Lever Worm Gear Electric Pneumatic |
|
Executive Standards
|
Design Standard |
EN 593, MSS SP67, API 609, BS 5155 |
|
Inspection & Test |
API 598, ISO 5208, EN 12266 |
|
End Standard |
ANSI B16.1 CL. 125LB & B16.5 CL. 150LB |
|
AS 2129 Table D & E |
|
|
BS 10 Table D & E |
|
|
DIN 2501 (PN6, PN10, PN16) |
|
|
EN 1092 (PN6, PN10, PN16) |
|
|
ISO 2531 (PN6, PN10, PN16), 7005 (PN6, PN10, PN16) |
|
|
KS B / JIS B 1511 / 2210 (5K & 10K) |
|
|
MSS SP44 CL. 150LB |
|
|
AWWA C207 |
|
|
SABS 1123 Table 1000/3 & Table 1600/3 |
|
|
Face to Face |
ISO 5752, EN 558, MSS SP67, API 609, DIN 3202 |
|
Top Flange |
ISO 5211 |
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