Product Detail Information
GBA Wafer Check Valve
GBA Valve
GBA Wafer Check Valve
Wafer check valves, also known as dual-plate check valves, have two spring loaded half-moon shaped discs that rotate about their shaft. The disc plates are kept shut by a torsion spring. When fluid flows in a forward direction, the pressure of the fluid causes the disc plates to swing open, allowing flow. The check valve is closed by the spring as soon as flow ceases, before any reverse flow can occur.

Normative reference
     API 6D Pipeline Valves
     API 594 Check Valves: Flanged, Lug, Wafer and Butt-Welding
     ASME B16.34 Valves Flanged, Threaded and Welding Ends
     ASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through 24
     ASME B16.47 Series A Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch 

Standard
     ASME B16.25 Buttwelding Ends
     ASME B16.10 Face to Face and End to End Dimensions of Valves
     MSS SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions

Size available
     NPS 2 to NPS 24 (DN50 to DN600)

Pressure rating available
     Class 150 to Class 900

Class 150
Standard Material Specification
Part Name
Material
Body
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Disc
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Pin
A182 F6a, A182 F22, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L
Spring
AISI 9260, AISI 6150, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L

Dimensions and Weights
Size
mm
50
65
80
100
125
150
200
250
300
350
400
450
500
600
in
2
2
3
4
5
6
8
10
12
14
16
18
20
24
L (mm)
60
67
73
73
86
98
127
146
181
184
191
203
219
222
H (mm)
103
122
135
173
196
222
279
339
409
450
514
549
606
717
Weight (kg)
2
3.2
4
6
9
12
22
38
54
80
118
210
240
410

Class 300 
Standard Material Specification
Part Name
Material
Body
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Disc
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Pin
A182 F6a, A182 F22, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L
Spring
AISI 9260, AISI 6150, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L

Dimensions and Weights
Size
mm
50
65
80
100
125
150
200
250
300
350
400
in
2
2
3
4
5
6
8
10
12
14
16
L (mm)
60
67
73
73
86
98
127
146
181
222
232
H (mm)
110
129
148
180
215
250
307
361
422
485
539
Weight (kg)
3.5
5
7
10
18.5
19
33
54
88
128
169

Class 600
Standard Material Specification
Part Name
Material
Body
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Disc
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Pin
A182 F6a, A182 F22, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L
Spring
AISI 9260, AISI 6150, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L

Dimensions and Weights
Size
mm
50
65
80
100
125
150
200
250
300
350
400
in
2
2
3
4
5
6
8
10
12
14
16
L (mm)
60
67
73
79
105
136
165
213
229
273
305
H (mm)
110
129
148
192
240
265
319
399
456
489
562
Weight (kg)
3.5
5
7
12
22.5
35
45
77
110
135
163

Class 900
Standard Material Specification
Part Name
Material
Body
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Disc
A216 WCB, A352 LCB, A351 CF8, A351 CF8M, A351 CF8C, A351 CF3, A351 CF3M
Pin
A182 F6a, A182 F22, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L
Spring
AISI 9260, AISI 6150, A182 F304, A182 F316, A182 F321, A182 F304L, A182 F316L

Dimensions and Weights
Size
mm
50
65
80
100
150
200
in
2
2
3
4
6
8
L (mm)
70
83
83
102
159
206
H (mm)
142
164
167
205
288
358
Weight (kg)
6.5
9
14
24
43
56

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