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Dual-plate, Metal-hinged Wafer-style Check Valves


Techno brand's body design offers the following features:

  • Compact wafer-style, one-piece design
  • Center post fully supports the internal assembly without external pins or plugs
  • No leakage to atmosphere is ensured due to TECHNO's standard design, which eliminates through holes and pipe plugs in the body
  • Maximum flow area reduces pressure loss
  • Reduces installation space and time
  • VALVE PLATES

  • The dual-plate design produces increased strength with reduced opening and closing time.
  • CLAMP PLATES
  • Clamp plates offer additional strength to valve plates and allow seals to be changed easily.
  • SEALS
  • Specially designed flat, full-contact seals maintain positive shutoff at low working pressures. Unlike most other valves, these seals are replaced easily in the field.
  • SPRINGS
  • Torsion springs assist valve plate closure, preventing flow reversal. Consistent valve response ensures against slamming and water hammer.
  • SHAFT
  • The shaft features heavy-duty, corrosion-resistant construction.
  • SHAFT SUPPORTS
  • Shaft supports act as stops to prevent over-travel of valve plates. They are corrosion resistant with large shaft-bearing surfaces and are easily removable for internal assembly, maintenance or change.
  • THRUST WASHERS
  • Thrust washers reduce friction and wear of valve plate hinges.

GENERAL DIMENSIONS
(All Dimensions in Inches)
Valve
Size
ASME
CLASS
A B C D E*
2" 125
150
2 1/8
2 3/8
4 1/8
4 1/8
-
-
2 1/4 -
-
21/2" 125
150
2 1/8
2 5/8
4 7/8
4 7/8
1/8
-
2 1/4 1 3/8
-
3"
125
150
2 1/4
2 7/8
5 3/8
5 3/8
3/8
-
3 1/8
3 3/16
3 1/2
2 7/8
4"
125
150
2 1/2
2 7/8
6 7/8
6 7/8
7/8
1/2
4 1/8
4 3/16
3 1/2
2 7/8
5"
125
150
2 3/4
3 3/8
7 3/4
7 3/4
1 1/4
5/8
5 1/8
5 3/16
4 1/2
3 1/2
6"
125
150
3
3 7/8
8 3/4
8 3/4
1 7/8
1
6 1/8
6 3/16
5 3/4
4 3/4
8"
125
150
3 3/4
5
11
11
2 3/4
1 1/2
8 1/4
8 5/16
7 7/8
6 5/8
10"
125
150
4 1/4
5 3/4
13 3/8
13 3/8
3 7/8
2 3/8
10 1/8
10 3/16
9 7/8
8 3/4
12"
125
150
5 5/8
7 1/8
16 1/8
16 1/8
4
2 1/2
12 1/8
12 3/16
11 1/2
10
14"
125
150
7 1/4
7 1/4
17 3/4
17 3/4
31/2
3
14 1/8
14 1/8
12 1/2
12
16"
125
150
7 1/2
7 1/2
20 1/4
20 1/4
4 3/4
4 1/8
16 1/8
16 1/8
15
14 3/8
18"
125
150
8
8
21 5/8
21 5/8
5 5/8
5
18 1/8
18 1/8
15
14 3/8
20"
125
150
8 3/8
8 5/8
23 7/8
23 7/8
5 5/8
5
18 1/8
18 1/8
16 7/8
16 1/4
24"
125
150
8 3/4
8 3/4
28 1/4
28 1/4
8 1/4
8
24 1/8
241/8
22 5/8
22 5/8
30"
125
150
12
12
34 3/4
34 3/4
10 1/4
9 1/4
30 1/8
30 1/8
28 5/8
27
36"
125
150
14 1/2
14 1/2
41 1/4
41 1/4
12 1/2
11
36 9/16
36 1/8
34
33