Ductile Iron Silent Check Valve: Reliable Core Component for Fluid Control

Product Introduction
The ductile iron silent check valve serves as a critical barrier against backflow in pipeline networks, ensuring unidirectional flow to safeguard pumps and equipment. Its technical superiority stems from the synergy between ductile iron's structural integrity and EPDM's dynamic sealing capabilities, maintaining reliability under high-frequency cycling or thermal stress. The internally biomimetic flow channel, validated by computational fluid dynamics, reduces pressure loss by over 15%, optimizing system efficiency. With customizable stem materials (galvanized/2Cr13/stainless steel), this valve excels in challenging environments such as seawater treatment and chemical processing, offering a balanced blend of durability and cost efficiency.
Product Features
Crafted from high-strength ductile iron, the silent check valve integrates the corrosion resistance of cast iron with the mechanical resilience of steel, effectively countering water hammer effects and pressure fluctuations in pipelines. Its advanced noise suppression technology utilizes precision-engineered disc movement paths and fluid channel geometry to minimize impact vibration and noise during closure, achieving operational sound levels below industry benchmarks. The EPDM (Ethylene Propylene Diene Monomer) seat material withstands temperatures up to 80°C, delivering exceptional elasticity and long-term sealing reliability. Flexible stem options include galvanized steel, 2Cr13 stainless steel, and 304 stainless steel, tailored for diverse corrosive media environments.

Product Advantages
Silent Operation Excellence
Multi-stage buffering mechanisms and aerodynamically profiled discs synergistically reduce fluid turbulence, enabling near-silent closure for enhanced environmental compatibility.
Durable Sealing Performance
The EPDM seat maintains high resilience under thermal cycling and frequent operation, preventing leakage and extending service life.
Cost-Effective Maintenance
Modular construction allows targeted component replacement without full valve disassembly, minimizing maintenance complexity and operational downtime.
Versatile Adaptability
Compatible with installation angles from 0° to 90° and pipe diameters from DN50 to DN600, ideal for water supply, HVAC, petrochemical, and other industrial applications.

|
Model number |
Nominal pressure |
Shell test pressure |
Seal test pressure |
Application medium |
Working temperature |
|
H41X-10 |
1.0MPa |
1.5MPa |
1.1MPa |
Water and weak corrosive fluid |
0-80℃ |
|
H41X-16 |
1.6MPa |
2.4MPa |
1.76MPa |
Water and weak corrosive fluid |
0-80℃ |
|
Model number |
Body |
Sealing ring |
Spring |
|
H41X-10 |
Cast iron or stainless steel |
Butyl rubber (NBR) |
1Cr18Ni9Ti stainless steel wire |
|
H41X-16 |
Cast iron or stainless steel |
Butyl rubber (NBR) |
1Cr18Ni9Ti stainless steel wire |
|
Nominal pressure |
Nominal diameter |
Size (mm) |
Nominal pressure |
Nominal diameter |
Size (mm) |
||||||||
|
L |
D |
K |
b |
Z-Ød |
L |
D |
K |
b |
Z-Ød |
||||
|
1.0 |
40 |
110 |
145 |
110 |
18 |
4-18 |
1.6 |
40 |
110 |
145 |
110 |
18 |
4-18 |
|
50 |
110 |
160 |
125 |
20 |
4-18 |
50 |
110 |
160 |
125 |
20 |
4-18 |
||
|
65 |
120 |
180 |
145 |
20 |
4-18 |
65 |
120 |
180 |
145 |
20 |
4-18 |
||
|
80 |
130 |
195 |
160 |
22 |
8-18 |
80 |
130 |
195 |
160 |
22 |
8-18 |
||
|
100 |
150 |
215 |
180 |
24 |
8-18 |
100 |
150 |
215 |
180 |
24 |
8-18 |
||
|
125 |
180 |
245 |
210 |
26 |
8-18 |
125 |
180 |
245 |
210 |
26 |
8-18 |
||
|
150 |
180 |
280 |
240 |
26 |
8-22 |
150 |
180 |
280 |
240 |
26 |
8-22 |
||
|
200 |
210 |
335 |
295 |
28 |
8-22 |
200 |
210 |
335 |
295 |
30 |
12-22 |
||
|
250 |
230 |
390 |
350 |
28 |
12-22 |
250 |
230 |
405 |
355 |
32 |
12-26 |
||
|
300 |
300 |
440 |
400 |
28 |
12-22 |
300 |
300 |
460 |
410 |
32 |
12-26 |
||
|
350 |
365 |
500 |
460 |
30 |
16-22 |
350 |
365 |
520 |
470 |
36 |
16-26 |
||
|
400 |
410 |
565 |
515 |
32 |
16-26 |
400 |
410 |
580 |
525 |
38 |
16-30 |
||
|
450 |
430 |
615 |
565 |
32 |
20-26 |
450 |
430 |
640 |
585 |
40 |
20-30 |
||
|
500 |
450 |
670 |
620 |
34 |
20-26 |
500 |
450 |
715 |
650 |
42 |
20-33 |
||
|
600 |
510 |
780 |
725 |
36 |
20-30 |
600 |
510 |
840 |
770 |
48 |
20-36 |
||
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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