Ductile Iron Body-Brass Disc Wafer Check Valve
Product Introduction
The Ductile Iron Body-Brass Disc Wafer Check Valve is designed for water, seawater, and mildly corrosive media. Featuring a GGG50 ductile iron body and H62 brass swing disc, it prevents backflow via fluid dynamics. Ideal for ship ballast systems, coastal water supply, and industrial cooling circuits, it operates at -20℃ to 80℃ with PN16 pressure, fitting DN50-DN400 pipelines and achieving ANSI Class III leakage.
Product Advantages
- Marine Adaptability: Brass disc resists biofouling in seawater cooling systems.
- Energy Saving: Ultra-low resistance cuts annual pumping costs by 12%-18%.
- Quick Installation: ISO 5211-compliant wafer design enables tool-free maintenance.
- Long-Term Reliability: 8+ year service life in non-abrasive environments.
Product Features
Cost-Efficient Hybrid
GGG50 body + brass disc withstands seawater (Cl⁻≤800ppm) at 40% lower cost than full stainless steel.
01
Low-Resistance Swing
75° opening angle reduces pressure loss <0.02 bar, increasing Kv value by 35%.
02
Compact Wafer Design
1/2 thickness and 40% lighter than flange valves for tight spaces.
03
Durable Seal
FKM/NBR inserts handle ≤0.3mm particles, closing in <0.6s against backflow.
04
Maintenance-Free Hinge
304 stainless hinge + graphite bushings resist salt spray for ≥10 years.
05
|
Nominal diameter DN |
Size (mm) |
Weight (kg) |
||||||
|
D |
D1 |
D2 |
L |
R |
t |
|||
|
mm |
inch |
DH77X-10/16 |
||||||
|
50 |
2" |
107 |
65 |
43.3 |
43 |
28.8 |
19 |
1.5 |
|
65 |
2.5" |
127 |
80 |
60.2 |
46 |
36.1 |
20 |
2.4 |
|
80 |
3" |
142 |
94 |
66.4 |
64 |
43.4 |
27 |
3.6 |
|
100 |
4" |
162 |
117 |
90.8 |
64 |
52.8 |
28 |
5.7 |
|
125 |
5" |
192 |
145 |
116.9 |
70 |
65.7 |
30 |
7.3 |
|
150 |
6" |
218 |
170 |
144.6 |
76 |
78.6 |
31 |
9.0 |
|
200 |
8" |
273 |
224 |
198.2 |
89 |
104.4 |
33 |
17 |
|
250 |
10" |
328 |
265 |
233.7 |
114 |
127 |
35 |
26 |
|
300 |
12" |
378 |
310 |
283.9 |
114 |
148.3 |
43 |
42 |
|
350 |
14" |
438 |
360 |
332.9 |
127 |
172.4 |
45 |
55 |
|
400 |
16" |
489 |
410 |
381.0 |
140 |
197.4 |
52 |
75 |
|
450 |
18" |
539/555 |
450 |
419.9 |
152 |
217.8 |
58 |
101/107 |
|
500 |
20" |
594 |
505 |
467.8 |
152 |
241 |
58 |
111 |
|
600 |
24" |
690 |
624 |
572.6 |
178 |
295.4 |
73 |
172 |
|
700 |
28" |
800 |
720 |
680 |
229 |
354 |
98 |
219 |
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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