Ductile iron GGG40 silent check valve soft seal
Valve Type: |
Silent check valve |
Structure: |
Silent type |
Standard: |
API609 |
Workmanship: |
Investment casting |
Sealing direction: |
Single-directional |
Sealing grade: |
Zero leakage |
Temperature: |
-20°C<T<120°C |
Operation: |
Self-starting |
Characteristics
This ductile iron silent check valve is a water hammer eliminating non-slam check valve for water supply systems. Made of high-strength QT450 ductile iron with epoxy anti-corrosion coating, it features streamlined axial flow passage and spring quick-close structure for noiseless operation, low pressure loss and reliable backflow prevention. Widely used in building water supply, fire protection, HVAC and municipal water pipeline projects.

Advantages
1.The check valve silent type adopts spring-assisted quick-close structure to eliminate water hammer and pipeline noise effectively, ensuring silent and stable operation for high-standard water supply systems.
2.The silent check with high-strength ductile iron body with full epoxy anti-corrosion coating features excellent pressure resistance and durability for long-term pipeline service.
3.Streamlined axial flow design reduces flow resistance and energy consumption. Automatic backflow prevention fully protects water pumps and pipeline systems.
Packing
Standard export wooden case packaging

Application Scenarios
This silent check valve is widely used in high-rise building water supply pump rooms, municipal water supply pipelines, fire protection systems, HVAC circulating water, hospital and hotel silent water supply projects, industrial water circulation and smart water pipe network systems.



Material
|
Part name |
Material |
Part name |
Material |
|
Body |
GJS 500-7 |
Gasket |
EPDM |
|
Disc |
GJS 500-7+EPDM |
|
ANSI 304 |
|
Spring |
ANSI 304 |
|
C61900 |
|
OO-ring |
NBR |
Baffle |
GJS 500-7 |
|
Stem |
ANSI 304 |
|
Dimension

|
Nominal diameter |
L |
D |
D1 |
N-Φd |
|||||||
|
DN(mm) |
NPS(in) |
PN10 |
PN16 |
PN25 |
PN10 |
PN16 |
PN25 |
PN10 |
PN16 |
PN25 |
|
|
50 |
2" |
150 |
165 |
165 |
165 |
125 |
125 |
125 |
4-Φ19 |
4-Φ19 |
4-Φ19 |
|
65 |
2.5" |
170 |
185 |
185 |
185 |
145 |
145 |
145 |
4-Φ19 |
4-Φ19 |
8-Φ19 |
|
80 |
3" |
180 |
200 |
200 |
200 |
160 |
160 |
160 |
8-Φ19 |
8-Φ19 |
8-Φ19 |
|
100 |
4" |
190 |
220 |
220 |
235 |
180 |
180 |
190 |
8-Φ19 |
8-Φ19 |
8-Φ23 |
|
125 |
5" |
200 |
250 |
250 |
270 |
210 |
210 |
220 |
8-Φ19 |
8-Φ19 |
8-Φ28 |
|
150 |
6" |
210 |
285 |
285 |
300 |
240 |
240 |
250 |
8-Φ23 |
8-Φ23 |
8-Φ28 |
|
200 |
8" |
230 |
340 |
340 |
360 |
295 |
295 |
310 |
8-Φ23 |
12-Φ23 |
12-Φ28 |
|
250 |
10" |
250 |
395 |
405 |
425 |
350 |
355 |
370 |
12-Φ23 |
12-Φ28 |
12-Φ31 |
|
300 |
12" |
270 |
445 |
460 |
485 |
400 |
410 |
430 |
12-Φ23 |
12-Φ28 |
16 -Φ31 |
















