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cast iron wafer style double door check valve

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Figure 682 CHECK VALVES CAST IRON WAFER STYLE DOUBLE DOOR CHECK VALVE WWW.FNW.COM direction. The spring backing the ceases prior to pressure reversal, therefore reducing slam or water hammer. Features: • 200 PSI Non-Shock • Temperature Range -4°F to 176°F (-20°C to 80°C) • Wafer Style • Non-Slam (Spring Actuated) Check for Water or Clean Fluids • Cast Iron Body & Stainless Steel Internal Components • Drop Tight Resilient Seat • Installation* • Epoxy Coated Body * When installed in the horizontal position, the door hinge shaft must be in the vertical position for proper operation. Use Flat-Faced Metal Flanges only. Not for Steam Service Standards: • Inspection & Test: API 598 • Flange Drilling: ANSI B16.1 Class 125 • Flange Face Finish: MSS SP-6 • Markings: MSS SP-25 Size Cv Wt. (Lbs) 2 22 2.87 2-1/2 33 4.63 3 52 6.39 4 87 9.48 5 133 14.11 6 198 20.06 8 335 33.51 10 562 58.42 12 781 81.57 Cv & Weights Figure Number Matrix FNW 682 Size SIZE CODE 4 = P 5 = S 6 = U 2 = K 2-1/2 = L 3 = M 8 = X 10 = 10 12 = 12

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Page 1: CAST IRON WAFER STYLE DOUBLE DOOR CHECK VALVE

Figure 682CHECK VALVES

CAST IRON WAFER STYLEDOUBLE DOOR CHECK VALVE

WWW.FNW.COM

direction. The spring backing the

ceases prior to pressure reversal, therefore reducing slam or water hammer.

Features: • 200 PSI Non-Shock • Temperature Range -4°F to 176°F (-20°C to 80°C)

• Wafer Style • Non-Slam (Spring Actuated) Check for Water or Clean Fluids

• Cast Iron Body & Stainless Steel Internal Components

• Drop Tight Resilient Seat •Installation*

• Epoxy Coated Body

* When installed in the horizontal position, the door hinge shaft must be in the vertical position for proper operation.

Use Flat-Faced Metal Flanges only.

Not for Steam Service

Standards: • Inspection & Test: API 598 • Flange Drilling: ANSI B16.1 Class 125

• Flange Face Finish: MSS SP-6 • Markings: MSS SP-25

Size Cv Wt. (Lbs)2 22 2.87

2-1/2 33 4.633 52 6.394 87 9.485 133 14.116 198 20.068 335 33.5110 562 58.4212 781 81.57

Cv & Weights Figure Number MatrixFNW 682 Size

SIZE CODE4 = P5 = S6 = U

2 = K 2-1/2 = L 3 = M

8 = X10 = 1012 = 12

Page 2: CAST IRON WAFER STYLE DOUBLE DOOR CHECK VALVE

© 2019 FNW - We reserve the right to modify or improve the designs or specifications of our products at any time without notice. 0119 1078398

Figure 682CHECK VALVES

CAST IRON WAFER STYLEDOUBLE DOOR CHECK VALVE

Size ØD ØD1 ØD2 L

2 4.13 2.36 1.50 2.13

2-1/2 4.88 2.87 1.89 2.13

3 5.39 3.50 2.52 2.24

4 6.97 4.49 3.43 2.52

5 7.76 5.51 4.02 2.76

6 8.74 6.61 5.12 2.99

8 10.98 8.62 6.97 3.74

10 13.39 10.75 8.50 4.25

12 16.14 12.76 10.24 5.59

Dimensions (Inches)Ref. No. Description Material Qty Remarks

1 Body Cast Iron ASTM A126 Class B 1

2 Disc (Door) Stainless Steel ASTM A351 CF8M 2

3 Shaft Stainless Steel SS316 2

4 Seat NBR 1 Bonded to Body

5 Spring Stainless Steel SS316 1 - 2 Qty 2 on 6 to 12 Inch Valves

6 Washer PTFE 2 - 11 Varies According to Size

7 Shaft Seal NBR 4

8 Hex Nut Stainless Steel SS304 4

9 Eye Bolt Steel ASTM A193 Grade B7 1 8 Inch and Larger

Standard Materials


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