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C421 Series Internal Valves |
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Introduction
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The C421 Series internal valves are designed with two outlets, bottom and side. The side outlet permits installing horizontal piping immediately adjacent to the tank without the need for extra pipe fittings. Primary use for the C421 Series is on bobtails and transports.
These units are designed as primary shutoff valves and to reduce the chance of uncontrolled product discharge in the event of an accident. Like all Fisher threaded internal valves, all C421 Series are suitable for both LP-Gas (propane) and ammonia, and comply with NFPA 58 requirements.
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| Figure 1. C421 Series Threaded Internal Valve |
Features
- Compact Design
- Suitable for LP-Gas (Propane) or Ammonia
- Meets NFPA 58 Requirements
- Teflon (TFE) Packing
- UL Listed
Maximum Allowable Inlet Pressure
400 psig (27,5 bar)
Outlet Pressure Range
See Table 1
Temperature Capabilities
-20° to 150°F (-29° to 66°C)
Body Sizes and End Connection Styles
See Table 1
Additional Technical Data
For more technical information contact your Fisher Distributor or refer to LP-31 Equipment Buyer’s Guide.
| Table 1. Valve Specifications |
CONNECTIONS
INLET x OUTLET |
CLOSING FLOW GALLONS PER MINUTE
(LITERS PER MINUTE) OF PROPANE |
VAPOR CAPACITY SCFH (m³/h(n)) OF PROPANE |
ORDER NUMBER(1) |
| Half Coupling |
Full Coupling |
25 Psig (1,7 Bar) Inlet |
100 Psig (6,9 Bar) Inlet |
Tee Body |
2-inches MNPT x
2-inches FNPT |
100 (378) |
60 (227) |
22,000 (590) |
37,600 (1008) |
C421-16-10 |
| 150 (568) |
90 (341) |
32,000 (858) |
54,500 (1461) |
C421-16-15 |
| 250 (946) |
130 (492) |
- - - |
- - - |
C421-16-25 |
3-inches MNPT x
3-inches FNPT |
150 (568) |
100 (378) |
29,200 (783) |
49,700 (1332) |
C421-24-15 |
| 200 (757) |
125 (473) |
44,400 (1190) |
75,400 (2021) |
C421-24-20 |
| 250 (946) |
165 (625) |
52,600 (1410) |
89,400 (2396) |
C421-24-25 |
| 400 (1514) |
235 (889) |
81,800 (2192) |
139,000 (3725) |
C421-24-40 |
| 500 (1893) |
325 (1230) |
- - - |
- - - |
C421-24-50 |
| 1. Standard unit with manual operating lever and Type P134 fusible link. For optional controls, refer to accessories section of LP-31 Equipment Buyers Guide. |
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