|
AF-74
Instrumentation Check Valve
|
|
FEATURE |
1. Working pressure
to 3000 PSI (206 bar).
|
2. Temperature rating to 250ºF (121ºC) |
|
with Buna O-ring. |
3.
Minimum flow resistance. |
4.
Inline check valve. |
5.
Instant shutoff in upstream condition. |
6.
100% factory tested. |
7.
Locks pressure in consumer. |
8.
Stops reversed flow to protect instrumention. |
9.
Purge system. |
10.
Suitable for gas or liquid. |
|
MATERIAL |
Body : |
S.S. 316 or
Brass |
Poppet : |
S.S. 316 |
O-ring : |
Buna-N for
S.S. 316 & brass body. |
Spring : |
S.S. 304 for
S.S. 316 & brass body. |
|
Material |
Temperature
Rating |
VITON |
-23ºC
to 191ºC (-10ºF to 375ºF) |
Buna-N |
-23ºC
to 121ºC (-10ºF to 250ºF) |
PTFE |
-46ºC
to 232ºC (-50ºF to 450ºF) |
Ethylene
Propylene
|
-46ºC
to 149ºC (-50ºF to 300ºF) |
|
DIMENSIONS |
Item
No.
|
Flow
Dia. |
Cv |
End
Connection |
L |
I |
H |
H1 |
Inlet |
Outlet |
|
4.8 |
0.47 |
|
|
50.5 |
30.5 |
- |
19 |
|
0.47 |
|
|
54 |
30.5 |
- |
|
0.16 |
|
|
54 |
30.5 |
12 |
|
0.47 |
|
|
56.5 |
30.5 |
- |
|
0.47 |
|
|
65 |
30.5 |
14 |
|
0.47 |
|
|
65 |
30.5 |
14 |
|
4.8 |
0.47 |
|
|
60.5 |
30.5 |
- |
19 |
|
|
|
60.5 |
30.5 |
- |
|
|
|
67.2 |
30.5 |
17 |
|
|
|
67.2 |
30.5 |
17 |
|
|
|
69.2 |
30.5 |
19 |
|
16.0 |
5.20 |
|
|
60.5 |
59.2 |
- |
32 |
|
|
|
93 |
59.2 |
- |
|
|
|
113 |
59.2 |
22 |
|
|
|
113 |
59.2 |
22 |
|
|
|
93 |
59.2 |
- |
|
|
|
97 |
59.2 |
- |
|
|
|
95 |
59.2 |
- |
|
|
|
110.7 |
59.2 |
28.58 |
|
|
|
81 |
59.2 |
27 |
|
|
|
81 |
59.2 |
27 |
|
|
|
110 |
59.2 |
27 |
|
|
|
81.5 |
59.2 |
32 |
|
|
|
81.5 |
59.2 |
32 |
|
TECHNICAL DATA |
End
Connection Size
|
1/8",
1/4", 6mm, 8mm |
3/8",
1/2", 10mm, 12mm
|
3/4",
14mm, 16mm
18mm,
20mm, 22mm
|
Max.
Working Pressure
@
21°C (70°F)
|
3000
PSI (20,600 kpa) |
Brass:
1500 PSI
(10,300
kpa)
S.S.
316: 2000 PSI
(13,700
kpa)
|
Temperature
Rating |
VITON
: -23°C to 191°C (-10°F to 375°F)
BUNA
: -23°C to 121°C (-10°F to 250°F)
|
Nominal
Cracking |
5,10,25
PSI (35, 66,170kpa)
Option
:
Spring with Cracking Pressure up to 100 PSI
|
Flow
Coefficient
(Cv)
|
1/8"
- 0.16
1/4",
6mm, 8mm - 0.47
|
3/8"
- 1.47
1/2",
10mm, 12mm - 1.68
|
4.48 |
Note:
Valves which are not actuated for a period of time may initially
crack at higher than
subsequent cracking pressure.
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