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


US Valve's 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 fugitive emissions to atmosphere is ensured due to its 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.

NOTE: Recommended maximum flow rates may be reduced due to maximum velocity ratings. Consult Technical Data section for details. *CV = the number of US gal/min that will result in 1 psi pressure loss across the valve at a temperature of 60° F.

FLOW COEFFICIENTS
VALVE
SIZE
CV*
2" 58
2-1/2" 92
3" 160
4" 320
5" 525
6" 800
8" 1,700
10" 3,000
12" 4,700
14" 5,950
16" 9,000
18" 13,500
20" 18,000
24" 32,000
30" 45,000
36" 69,000




Standard elastomer: Buna-N
Upon request, body can be drilled and tapped to accept a breakaway plug or drainage adapter.

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
-
-
2-1/8
2-1/4
-
-
21/2" 125
150
2-1/8
2-5/8
4-7/8
4-7/8
1/8
-
2-5/8
2-3/4
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
2-1/8
-
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
3-1/2
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
16-7/8
16-1/4
20"
125
150
8-3/8
8-5/8
23-7/8
23-7/8
6-1/2
5-1/2
20-1/8
20-1/8
18-13/16
18-1/8
24"
125
150
8-3/4
8-3/4
28-1/4
28-1/4
8-1/4
8
24-1/8
24-1/8
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