Equipment Failure Rates: Valve
H28-700A to H28-C00
Equipment failure rates, MTBF, MTTR, and downtime statistics for electrical and mechanical plant equipment. Primary data from the USACE PREP reliability database (IEEE Std 3006.8-2018 Table 2), covering ~280 equipment classes. Supplemental data from IEEE motor and transformer surveys.
| equipment type | class code | description | failure rate per year (failures/year) | failures (count) | mdt hours (h) | mtbf hours (h) | mttm hours (h) | mttr hours (h) | standard | survey | unit years (unit-years) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Valve | H28-700A | Valve, expansion | 0.000349 | 0 | — | 34,080,094 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 1,984.1 |
| Valve | H28-810 | Valve, gate, normally closed | 0.00437 | 8 | 0.99 | 2,004,354 | 0.59 | 7.5 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 1,830.5 |
| Valve | H28-820 | Valve, gate, normally open | 0.000751 | 13 | 150.13 | 11,656,721 | 1.3 | 9.31 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 17,298.8 |
| Valve | H28-830 | Valve, gate, double flap | 0.438785 | 76 | 10.67 | 19,964 | — | 10.67 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 173.2 |
| Valve | H28-910A | Valve, globe, normally closed | 0.000031 | 0 | 1 | 80,035,718 | 1 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 22,125.4 |
| Valve | H28-920 | Valve, globe, normally open | 0.003424 | 66 | 129.72 | 2,558,581 | 0.4 | 16.65 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 19,277 |
| Valve | H28-A10 | Valve, plug, normally closed | 0.013905 | 123 | 1.17 | 630,002 | 0.05 | 1.37 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 8,845.9 |
| Valve | H28-A20 | Valve, plug, normally open | 0.003914 | 25 | 4 | 2,238,151 | — | 4 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 6,387.4 |
| Valve | H28-B10 | Valve, reducing, makeup water | 0.142473 | 100 | 17.99 | 61,485 | 0.59 | 5.56 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 701.9 |
| Valve | H28-C00 | Valve, relief | 0.015568 | 165 | 137.61 | 562,676 | 102.91 | 7.55 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 10,598.4 |
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