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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

Resources

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

PDF download