HH47X slow closing check valve
Overview:
It is mainly used in the supply and drainage pipelines of clean water, source water, sewage, seawater and other media. It is installed at the outlet of the water pump to cut off the backflow of the medium and eliminate the destructive water hammer caused by atomic energy, protecting the safe operation of the water pump and the pipeline. Its main features are: 1. Small size, light weight, and a structural length only about one-third of that of a rotary check valve. 2. The slow closing system has excellent performance and is not affected by the medium in the pipeline. The valve disc closes quickly first and then slowly, which can prevent destructive water hammer. 3. Rubber soft seal, good sealing performance, wear-resistant, and long service life. 4. Rubber buffer, smooth opening and closing, no vibration, no noise. 5. Compared to traditional check valves, it has lower flow resistance and significant energy-saving effects.

Performance specifications:
|
Model number
|
HH47X-10 HH48X-10 HH49X-10
|
HH47X-16 HH48X-16 HH49X-16
|
|
|
Nominal Pressure
|
PN1.0MPa
|
PN1.6MPa
|
|
|
Nominal Diameter
|
DN50~800mm
|
DN50~800mm
|
|
|
Sealing test pressure
|
1.1MPa
|
1.76MPa
|
|
|
Shell test pressure
|
1.5MPa
|
2.4MPa
|
|
|
Main component materials
|
Valve body
|
Grey cast iron or ductile iron
|
Grey cast iron or ductile iron
|
|
Valve disc
|
aluminum bronze
|
aluminum bronze
|
|
|
Valve stem
|
stainless steel
|
stainless steel
|
|
|
Spring
|
stainless steel
|
stainless steel
|
|
|
Valve seat sealing surface
|
rubber
|
rubber
|
|
Main external dimensions:
|
Nominal diameter DN
|
Dimensions (mm)
|
||||||||
|
mm
|
in
|
D
|
D1
|
D2
|
H
|
H1
|
L
|
Z-fd
|
bolt
|
|
150
|
6
|
280
|
240
|
210
|
228
|
172
|
210
|
8-f23
|
8-M20
|
|
200
|
8
|
335
|
295
|
265
|
270
|
210
|
230
|
8-f23
|
8-M20
|
|
250
|
10
|
390
|
350
|
320
|
305
|
240
|
250
|
12-f23
|
12-M20
|
|
300
|
12
|
440
|
400
|
368
|
367
|
264
|
270
|
12-f23
|
12-M20
|
|
350
|
14
|
500
|
460
|
428
|
422
|
294
|
290
|
16-f23
|
16-M20
|
|
400
|
16
|
565
|
515
|
482
|
462
|
324
|
310
|
16-f23
|
16-M22
|
|
450
|
18
|
615
|
565
|
532
|
497
|
351
|
330
|
20-f25
|
20-M22
|
|
500
|
20
|
670
|
620
|
585
|
532
|
379
|
350
|
20-f25
|
20-M22
|
|
600
|
24
|
780
|
725
|
685
|
607
|
434
|
390
|
20-f30
|
20-M27
|
|
700
|
28
|
895
|
840
|
800
|
702
|
491
|
430
|
24-f30
|
24-M27
|
|
800
|
32
|
1010
|
950
|
905
|
792
|
549
|
470
|
24-f34
|
24-M30
|
