Unit converter
Pressure, flow, temperature, length, power…
Motor data (NEC)
FLC, wire, breaker, fuse, starter
Pump-up test (actual CFM)
Diagnose pump health from tank fill time
Motor amperage
1Φ / 3Φ HP → FLA
Belt length & pulley
Center distance formula
Voltage drop
3Φ NEC method
CFM converter
ACFM ↔ SCFM, HP estimate
Pressure converter
PSI, bar, kPa, atm
Receiver sizing
Tank gallons for event
Leak cost
$/yr lost to leaks
Pipe sizing
CFM by pipe diameter
Compression ratio
Discharge / suction (abs)
Pressure switch cut-in/cut-out
Differential, starts/hr, MAWP check
Air Dryers & Treatment
Dryer capacity correction
Nameplate SCFM → actual at site conditions
Dewpoint converter
Pressure ↔ atmospheric dewpoint
Condensate load
Gallons/day water removed
ΔP energy cost
$/yr lost to pressure drop
Oil & Piping
Oil library (specs & cross-reference)
40+ oils by machine, brand & base stock — full properties
Oil change interval & TAN
Oil + machine + hours → interval, remaining life, TAN limits
Oil aging / remaining life
Hours × temp × duty · Arrhenius derate
Oil compatibility chart
Mineral · PAO · PAG · ester · silicone · food-grade
Pipe properties chart
OD, ID, wall, weight, WP, volume — steel, copper, aluminum, HDPE
Energy & Air Audit
Specific power (CAGI benchmark)
kW/100 CFM vs published class data
VFD retrofit payback
Bin-by-bin savings vs load/unload or modulation
Artificial demand
$/yr recovered by dropping header pressure
Pneumatics
Valve Cv sizing
Cv ↔ SCFM, choked-flow detection
Cylinder air consumption
SCFM per cycle, rod force, supply line velocity
Guides & FAQs
HVAC
Refrigerant P/T chart
22 refrigerants, glide, GWP, altitude
AC tonnage
BTU or sqft → tons (climate zone)
Airflow CFM
Tons × 400 or Q ÷ (1.08 × ΔT)
Duct sizing
Round & rectangular from friction rate
Duct pressure drop
Fittings TEL → in.wc vs blower ESP
Manual J quick load
Rough BTU/hr & tons from sqft
Superheat target
Fixed-orifice charging from IWB/ODB
Subcool (TXV)
Sat temp − liquid line temp
Evaporator ΔT
Return − supply, target by WB
SEER2 cost & upgrade
$/yr cooling and payback
Heat pump balance point
Thermal & economic crossover