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Wafer Check Valve -> Flanged Dual-plate Wafer Check Valve
Dual-plate check valves are are bonnetless and mounted between pipe flanges (wafer style). In this case, the valve includes two spring loaded half-moon shaped discs that rotate about their shaft. The actual designs of these valves vary between design models and manufacturers. Most have multiple flat seats. The dual-plate check valve disc has short rotational disc travel and responds quickly to flow stoppage or reversal, thus the potential for moderate water hammer does exist. It is somewhat better than the swing check valve at minimizing potential water hammer, but with a much higher pressure drop.
Applicable Standards of Flanged Dual-plate Wafer Check Valves:
A) Design&Manufacture: API 6D, API 594
B) Face to Face: API 6D, ASME B16.10, EN 558
C) Connection End: ASME B16.5, EN 1092, JIS B2220
D) Test and Inspection: API 6D, EN 12266, API 598
Sizes: 2" - 48" or DN50 - DN1200
Pressure Rating: Class150 - Class1500 or PN16 - PN250
Material of Valve Body: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M, etc.
The features of check valve
Bolted Bonnet; Swing and lift disc; Metallic seating surfaces.
Body and Bonnet Connection
The body and bonnet of Class150~Class900 check valves are usually with studs and nuts. And the body and bonnet of Class1500~Class2500 check valves are usually of pressurized seal design.
Seat
For carbon steel check valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS<10 check valves, and welded on seat can be also optional if being requested by the customer. Welded on seat is used for NPS>12 crbon steel gate valves. Forstainless steel check valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel check valve if being requested by the customer.
Our Advantages:
1. We Are Factory: FYV has 3 production bases and 1 foundry which located in Wenzhou, Shanghai and Lishui city of China. The Factory Size in Square Meters: 110, 000. FYV has over 600 staff members, more than 60 technical engineers, a digital process center and more than 350 sets of various middle and large equipments. The annual sales revenue reaches above $80 million US Dollars.
2. Regional Sales: We provide specialized sales service refers to different kind of region all over the world. Each sales team member is good at the local language and well experienced to the responsible market. For example: Russian, German, Spanish, Japanese, etc.
3. Low MOQ: Our factory owns the casting company by itself. We are always ready for providing the sample and producing some small orders, in order to meet the business well.
4. OEM Accepted: We can make the products with the client's demand standard or the custom requirement.
5. Complete Service: We are always ready to hear from you, be responding to your enquiry immediately. Our trade manager is always online for you.
6. Good Quality: We have strict quality control system and amounts of testing equipments for different kind of valve, such as size, pressure, working environment etc. We are winning the market reputation with the time goes by.
7. Quick Delivery: We have the large stock for some hot products.
8. Competitive Prices: We are the manufacturing company which not only has our own manufacturing workshop, but the casting company as well. We provide the straight factory price and service to our customer.
No .
Part name
Material
1
Body
WCB\CF8\CF8M\CF3\CF3M
2
Plate
WCB\CF8\CF8M\CF3\CF3M
3
Spring
INCONEL\17-7PH
4
Valve shaft
F6a\304\316\304L\316L\17-7PH
Class150
Class300
Class600
Class900
Class1500
Size
L
D
WT
L
D
WT
L
D
WT
L
D
WT
L
D
WT
inch
mm
mm
kg
mm
mm
kg
mm
mm
kg
mm
mm
kg
mm
mm
kg
2
60
103
2
60
110
3
60
110
4
70
140
8
70
140
8
21/2
67
122
3
67
128
4
67
128
5
83
162
11
83
162
11
3
73
135
4
73
147
6
73
147
8
83
165
14
83
172
19
4
73
173
6
73
179
8
79
191
11
102
204
20
102
207
26
5
86
195
8
86
214
15
105
239
20
110
245
30
110
252
51
6
98
220
13
98
249
18
136
264
26
159
286
42
159
280
68
8
127
277
25
127
305
31
165
318
55
206
356
84
206
350
130
10
146
337
39
146
359
51
213
398
95
241
432
145
248
433
210
12
181
407
54
181
420
77
229
455
140
292
495
220
305
518
384
14
184
448
80
222
483
117
273
490
223
356
518
350
356
576
550
16
191
512
117
232
537
190
305
562
360
384
572
470
384
639
635
18
203
547
138
264
594
200
362
610
395
451
635
605
-
-
-
20
219
604
163
292
652
265
368
680
518
451
695
820
-
-
-
24
222
715
331
318
772
410
438
786
836
495
835
1050
-
-
-
28
305
773
380
-
-
-
-
-
-
-
-
-
-
-
-
30
305
824
425
368
882
660
-
-
-
-
-
-
-
-
-
32
305
878
560
-
-
-
-
-
-
-
-
-
-
-
-
Wafer Dual Plate Retainerless Wafer Check Valve
Model NO.: FYV
Flow Direction: Bidirectional
Standard: ANSI
Application: Industrial Usage, Water Industrial Usage, Household Usage
Size: 2"~48"
Class: 150-900lb
End: RF, Rtj, Sw, Bw
Operation: Manual, Electric, Pneumatic, Gear
Trademark: FYV
Transport Package: Wooden etc
Specification: CE, SGS
Origin: China
HS Code: 8481804090
Product Details: Flanged Dual-plate Wafer Check Valve