Series 76

nominal*

flange

Size

(mm)

H

Suggested

table/Pipe

Dims: **

O.D. x Wall

(inches)

ISO Multi-fastener

flange (ISO-Mf)

ISO Bolted flange

(ISO-Bf)

a

(O.D.)

B

(thickness)

#

Clamps

required

C

(O.D.)

D

(thickness)

e

(Bolt

Circle)

f

(Bolt

Holes)

n

(# Holes)

Wrench

(mm)

NW 63

2.5 x .065

3.74

(95)

.47

(12)

3-4

5.12

(130)

.47

(12)

4.33

(110)

.35

(9)

4

13

NW 80

3.0 x .065

4.33

(110)

.47

(12)

4-8

5.71

(145)

.47

(12)

4.92

(125)

.35

(9)

8

13

NW 100

4.0 x .065

5.12

(130)

.47

(12)

4-8

6.50

(165)

.47

(12)

5.71

(145)

.35

(9)

8

13

NW 160

6.0 x .083

7.09

(180)

.47

(12)

4-8

8.86

(225)

.63

(16)

7.87

(200)

.43

(11)

8

17

NW 200

8.0 x .120

9.45

(240)

.47

(12)

6-12

11.22

(285)

.63

(16)

10.24

(260)

.43

(11)

12

17

NW 250

10.0 x .125

11.42

(290)

.47

(12)

6-12

13.19

(335)

.63

(16)

12.20

(310)

.43

(11)

12

17

NW 320

12.75 x .165

14.57

(370)

.67

(17)

8-12

16.73

(425)

.79

(20)

15.55

(395)

.55

(14)

12

19

NW 400

16.0 x .188

17.72

(450)

.67

(17)

8-16

20.08

(510)

.79

(20)

18.90

(480)

.55

(14)

16

19

NW 500

20.0 x .188

21.65

(550)

.67

(17)

12-16

24.02

(610)

.79

(20)

22.83

(580)

.55

(14)

16

19

NW 630

25.0 x .250

---

---

---

29.53

(750)

.94

(24)

28.35

(720)

.55

(14)

20

19

* NW is retained here by convention. It does not specify the flange type but is from the German “Nennweite,” meaning nominal diameter.

** Schedule 5 pipe is for sizes 320 and above.

elastomer Comparison

Buna-n

viton

®

Compound

N674-70

V747-75

Color

Black

Black

Bakeout

80°C

150°C

Benefits

Seals easier,

lower cost

High temperature,

lasts longer

Specifications

Maximum Pressure

(with spacer ring)

30 psig

Minimum Pressure

10

Leak Check

>10

Torque Rating

(clamps and bolts)

7-10 lbs/foot

Materials

Fittings

Retaining Rings

Clamps

Rotatable Bolt Rings

Seal Assembly

304 stainless steel

Steel

Aluminum alloy

Aluminum alloy

Aluminum spacer ring,

choice of aluminum or

stainless steel centering ring,

choice of Viton or Buna-N

elastomer seal