| A STEM - ALLOY 625 ASTM B 446.
(Other Metallurgies Available)
One piece, full length stem with integral "DD" disc
position indicator.
B STEM RETAINER - ALLOY 625 ASTM B 446.
Insures positive retention of stem.
C BODY - CAST CARBON STEEL ASTM A-216 GRADE
WCB WAFER OR LUG.
Stronger than cast or ductile iron. Not subject to thermal shock. Also available
in stainless steel and aluminum.
D DISC - INVESTMENT CAST - ALLOY 20 ASTM A 744
CN7M.
(Other Metallurgies Available)
Has superior corrosion resistance. Polished edge
reduces torque requirements.
E EXTERIOR FINISH.
High gloss epoxy. Maximum protection from environmental
corrosion.
F GASKET SURFACE.
Bonded to valve body. Will not "fold" on
insertion between flanges.
G BUSHING - RYTON/TFE.
Reinforced top stabilizer bushing prevents
side loading.
H SECONDARY STEM SEAL. Pressure activated
Viton seal ring.
I & K PRIMARY STEM SEAL.
Integrally molded O-Ring seal.
J BODY LINER.
Molded and bonded to body; prevents seat blowout.
L BUSHING / RETAINER CUP - RYTON/TFE.
Reinforced bottom stabilizer bushing prevents
side loading and leak path to casting. Provides protection
to stem from premature wear caused by metal-to-metal contact.
M DISC
TO STEM CONNECTION.
Flat drive mechanism.
The quarter turn operation of the disc
is easily accomplished by the handlever (with friction
lock positioner) or weatherproof gear operator. For pneumatic
or electric actuation packages, see Automated
Valves. The Mosites Butterfly Valve meets ANSI B16.104,
Class VI, bi-directional shut off specifications. The valve
can also be used for full vacuum and dead end service.
A20N COEFFICIENT OF FLOW
Cv of valve opening
Valve Size |
20º |
30º |
40º |
50º |
60º |
70º |
80º |
90º |
2" |
1 |
8 |
18 |
30 |
43 |
73 |
117 |
159 |
3" |
3 |
16 |
38 |
75 |
132 |
195 |
296 |
429 |
4" |
9 |
43 |
82 |
150 |
241 |
377 |
615 |
884 |
6" |
21 |
95 |
186 |
338 |
541 |
872 |
1340 |
1800 |
8" |
38 |
165 |
330 |
601 |
963 |
1550 |
2460 |
3400 |
10" |
59 |
258 |
515 |
938 |
1500 |
2420 |
3850 |
5830 |
12" |
86 |
371 |
741 |
1350 |
2170 |
3490 |
5540 |
7960 |
A20N TORQUES & WEIGHTS
All weights shown in pounds
Valve Size |
ACTUAL TORQUE
INCH POUNDS* |
VALVE WEIGHT
LESS OPERATOR LUG BODY |
VALVE WEIGHT
LESS OPERATOR WAFER BODY |
GEAR OPERATOR
WEIGHT |
HANDLEVER OPERATOR
WEIGHT |
2" |
35 |
9 |
7 |
13 |
4 |
3" |
210 |
17 |
14 |
15 |
7 |
4" |
228 |
21 |
17 |
23 |
7 |
6" |
657 |
33 |
27 |
29 |
7 |
8" |
830 |
74 |
65 |
29 |
9 |
10" |
2365 |
101 |
95 |
43 |
10 |
12" |
3797 |
142 |
135 |
43 |
10 |
* Torque specifications
are based on optimum test conditions. Actual torques may
vary under different field
and environmental applications. For actuator sizing multiply torques by 1.25.
A20N DIMENSION TABLE
Valve
Size |
A |
B |
C |
D |
E |
F |
G |
H |
J |
K |
L |
M(LUG) |
N |
P |
R |
2" |
2.09 |
3.50 |
1.75 |
3.25 |
2.469 |
0.500 |
4.75 |
2.203 |
1.50 |
1.51 |
10-32
ON 1.125 BC |
5/8-11
4 HOLES |
3/8-16 2 HOLES |
6.00 |
0.375 |
3" |
3.00 |
4.63 |
2.06 |
3.88 |
3.000 |
0.625 |
6.00 |
3.250 |
1.81 |
2.45 |
1/4-20
ON 1.375 BC |
5/8-11
4 HOLES |
1/2-13 2 HOLES |
7.63 |
0.500 |
4" |
4.03 |
5.91 |
2.25 |
4.75 |
2.125 |
0.625 |
4.25 |
3.000 |
2.00 |
3.72 |
1/4-20
ON 1.375 BC |
5/8-11
8 HOLES |
1/2-13 2 HOLES |
9.00 |
0.500 |
6" |
6.10 |
7.88 |
2.44 |
5.75 |
2.125 |
0.750 |
5.38 |
3.000 |
2.19 |
5.66 |
1/4-20
ON 1.984 BC |
3/4-10
8 HOLES |
1/2-13 2 HOLES |
11.00 |
0.625 |
8" |
7.89 |
10.00 |
2.63 |
7.13 |
2.125 |
1.000 |
7.00 |
3.500 |
2.38 |
7.74 |
1/4-20
ON 2.203 BC |
3/4-10
8 HOLES |
1/2-13 2 HOLES |
13.63 |
0.875 |
10" |
9.73 |
12.00 |
2.94 |
8.50 |
4.125 |
1.250 |
7.00 |
5.016 |
2.69 |
9.78 |
- |
7/8-9
12 HOLES |
5/8-11 2 HOLES |
17.00 |
1.000 |
12" |
11.71 |
14.00 |
3.31 |
10.00 |
4.125 |
1.500 |
8.00 |
5.016 |
3.06 |
11.69 |
- |
7/8-9
12 HOLES |
5/8-11 2 HOLES |
20.00 |
1.250 |
|
