Plumbing Pressure Relief Valve Sizing Calculator
Compare independently established relieving mass load against caller verified same-fluid/backpressure relief-valve capacities; no relief-load derivation, universal orifice formula, pressure vessel sizing approval or operating instructions.
Description
Relief-valve capacity depends on fluid and backpressure conditions.
Relief-valve capacity depends on fluid and backpressure conditions. Independently established relieving load must be compared with matching certified capacities.1
The returned values include Caller compatible candidate ids, Signed candidate capacity margins kg hour. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Pressure Relief Valve Sizing Calculator
Use Plumbing Pressure Relief Valve Sizing Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No relief-load derivation, orifice formula, pressure-vessel approval or operating instruction is supplied.
Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
How to use Plumbing Pressure Relief Valve Sizing Calculator and understand its results
- Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
- Enter callerReliefValveIds, callerVerifiedMatchedRelievingMassKgHour, callerIndependentlyEstablishedReliefLoadKgHour using the field table and calculation rules, then run the tool.
- Read callerCompatibleCandidateIds, signedCandidateCapacityMarginsKgHour. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| callerReliefValveIds | Caller relief valve ids | list of string | Required |
| callerVerifiedMatchedRelievingMassKgHour | Caller verified matched relieving mass kg hour | list of number | Required |
| callerIndependentlyEstablishedReliefLoadKgHour | Caller independently established relief load kg hour | number | Required |
Enter aligned nonempty unique nonblank valve IDs and nonnegative matched mass capacities, plus nonnegative independently established relief load. Return all adequate candidates and signed kg/h margins.
margin=capacity−reliefLoad; eligible=margin≥0 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| callerCompatibleCandidateIds | Caller compatible candidate ids | list of string |
| signedCandidateCapacityMarginsKgHour | Signed candidate capacity margins kg hour | list of number |
{
"input": {
"callerReliefValveIds": [
"a",
"b",
"c"
],
"callerVerifiedMatchedRelievingMassKgHour": [
5,
10,
20
],
"callerIndependentlyEstablishedReliefLoadKgHour": 8
},
"output": {
"callerCompatibleCandidateIds": [
"b",
"c"
],
"signedCandidateCapacityMarginsKgHour": [
-3,
2,
12
]
}
}Limitations and assumptions
No relief-load derivation, orifice formula, pressure-vessel approval or operating instruction is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Plumbing Vacuum Breaker Size Calculator: Vacuum-breaker sizing needs air-admission capacity at matched conditions. A capacity catalog can screen candidates against a stated demand. For a complementary task, use Plumbing Steam Trap Capacity Calculator: Steam-trap capacity must exceed condensate load with an explicit selection multiplier. Rated capacities must match differential pressure and condensate conditions.
References
Similar or alternative tools
- Plumbing Vacuum Breaker Size Calculator
Vacuum-breaker sizing needs air-admission capacity at matched conditions. A capacity catalog can screen candidates against a stated demand.
- Plumbing Steam Trap Capacity Calculator
Steam-trap capacity must exceed condensate load with an explicit selection multiplier. Rated capacities must match differential pressure and condensate conditions.