Hydronic Specialties
Datasheet constraints: every range, checkbox and listbox field now states its direction
Showing changes from Rev 4
to Rev 5
in Hydronic Specialties.
---
title: Hydronic Specialties
…118 unchanged lines
- "Relief valve selection data"
- "Gauge, thermometer, thermowell, and test plug schedule"
+constraint: all_of
```
…28 unchanged lines
- "Relief valve certification and as-installed set pressure"
- "Warranty documentation"
+constraint: all_of
```
…7 unchanged lines
```datasheet
−label: Minimum Body Working Pressure Rating
+label: Body Working Pressure Rating
type: range
unit: psig
…3 unchanged lines
derived: "the design pressure and maximum design temperature of the piping system served, as specified under [[sync/hydronic-piping]]"
default: derived
+constraint: min
```
…137 unchanged lines
setpoints: [3, 5, 10]
default: 5
+constraint: max
```
…20 unchanged lines
```datasheet
−label: Maximum Closed Fraction of Stroke at Design Flow
+label: Closed Fraction of Stroke at Design Flow
type: range
unit: '% of stroke'
…2 unchanged lines
setpoints: [25, 50, 60, 75]
default: 50
+constraint: max
```
…32 unchanged lines
derived: "the maximum differential pressure across the served branch at the design condition, from the hydraulic calculations"
default: derived
+constraint: min
```
…15 unchanged lines
- "Metering ports on both sides of the cartridge"
- "Union end for cartridge access"
+constraint: all_of
```
…39 unchanged lines
setpoints: [5, 10, 15]
default: 10
+constraint: max
```
…9 unchanged lines
derived: "the maximum differential pressure across the served terminal at the design condition, from the hydraulic calculations"
default: derived
+constraint: min
```
…9 unchanged lines
max: 15
setpoints: [1, 2, 5, 10, 15]
+constraint: max
```
…102 unchanged lines
derived: "the pump shutoff differential pressure at the valve location, from the pump selection under [[sync/hvac-pumps]]"
default: derived
+constraint: min
```
…10 unchanged lines
default:
- "Visible position indicator"
+constraint: all_of
```
…81 unchanged lines
derived: "the design differential pressure across the served branch, from the hydraulic calculations"
default: derived
+constraint: exact
```
…38 unchanged lines
- "Inlet of each chiller, boiler, and heat exchanger"
- "Makeup water connection upstream of the fill valve"
+constraint: all_of
```
…28 unchanged lines
setpoints: [20, 40, 60, 80, 100]
default: 20
+constraint: min
```
…7 unchanged lines
max: 0.1875
setpoints: [0.033, 0.045, 0.0625, 0.125, 0.1875]
+constraint: max
```
…5 unchanged lines
```datasheet
−label: Minimum Screen Net Free Area as a Multiple of Pipe Area
+label: Screen Net Free Area as a Multiple of Pipe Area
type: range
unit: 'times pipe area'
…2 unchanged lines
setpoints: [2, 3, 4, 6]
default: 3
+constraint: min
```
…149 unchanged lines
derived: "the design pressure and maximum design temperature of the piping system served, as specified under [[sync/hydronic-piping]]"
default: derived
+constraint: min
```
…27 unchanged lines
derived: "the system fluid volume and the initial inhibitor charge required under [[sync/hvac-water-treatment]]"
default: derived
+constraint: min
```
…9 unchanged lines
derived: "the design pressure of the piping system served, as specified under [[sync/hydronic-piping]]"
default: derived
+constraint: min
```
…40 unchanged lines
- "Air vent at the top of the vessel"
- "Drain valve at the bottom of the vessel"
+constraint: all_of
```
…41 unchanged lines
default:
- "Low reservoir level"
+constraint: all_of
```
…9 unchanged lines
derived: "the system fluid volume and the expected makeup rate, from the glycol charge calculation under [[sync/hydronic-cleaning-and-flushing]]"
default: derived
+constraint: min
```
…17 unchanged lines
derived: "the lowest published working pressure rating of any component in the protected system, coordinated with the expansion tank rating under [[sync/expansion-tanks-and-air-separators]]"
default: derived
+constraint: exact
```
…37 unchanged lines
- "Expansion tank connection"
- "System side of the makeup water fill"
+constraint: all_of
```
…25 unchanged lines
setpoints: [2.5, 3.5, 4.5, 6]
default: 4.5
+constraint: exact
```
…9 unchanged lines
derived: "twice the normal operating pressure at the gauge location, from the hydraulic calculations"
default: derived
+constraint: exact
```
…64 unchanged lines
- "Inlet and outlet of each chiller, boiler, and heat exchanger"
- "Supply and return main at the plant"
+constraint: all_of
```
…24 unchanged lines
max: 5
setpoints: [3, 5]
+constraint: exact
```
…11 unchanged lines
derived: "the service temperature range at the thermometer location, from the system design temperatures specified under [[sync/hydronic-piping]]"
default: derived
+constraint: exact
```
…8 unchanged lines
setpoints: [1, 2]
default: 1
+constraint: max
```
…23 unchanged lines
derived: "the pipe size at the thermowell location, so that the sensitive portion of the stem is within the middle third of the flow"
default: derived
+constraint: exact
```
…23 unchanged lines
- "Inlet and outlet of each coil and terminal unit"
- "Each side of each balancing device without integral metering ports"
+constraint: all_of
```
…93 unchanged lines
- "Manual air vent"
- "Test plugs on supply and return"
+constraint: all_of
```
…77 unchanged lines
- "Relief valve lift test and set pressure"
- "Fill and glycol makeup set points"
+constraint: all_of
```
…26 unchanged lines
setpoints: [1, 2, 3, 5]
default: 1
+constraint: min
```
…28 unchanged lines
- "One spare cartridge for each flow-limiting valve size and rating installed"
- "One test plug gauge adapter and probe kit"
+constraint: all_of
```
## Spare screens and cartridges let the operator service the devices that foul without waiting on procurement, and the test plug kit is what turns the test plugs into an instrument the operator can actually use. The spare actuator is chosen on a project with many pressure-independent valves, where one failed actuator at a time is the expected failure mode and the terminal is down until it is replaced. {note}