I had a valve lock up due to calcium deposits. I removed it to replace, then realized it just needed the calcium cleared out from inside. If you have hard water, this is a likely scenario given the age of the valves.

Watervelocity Calculator

A few drops of light machine oil or a penetrating oil like PB blaster behind the black handles might help. Can also remove the small screw and pull the handles off and spray some oil inside.

Maximumvelocityinpipeformula

Can someone tell me which direction they should be turned? Do I need to loosen the screw in the middle first? How much pressure should be applied? etc.

Use the Result Table option to display a table of the inside diameter and cross section area versus either outside diameter or wall thickness.

Velocity calculator for pipemetric

Fluid density can be calculated from temperature and pressure using the ideal gas equation. Gas compressibility can be calculated from critical point data. Fluid flowrate can be calculated from either volume flowrate, mass flowrate, mole flowrate, or velocity.

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Calculate single phase gas properties for common gases: argon Ar, n-decane C10H22, ethylene C2H4, ethyl chloride C2H5Cl, ethane C2H6, propene C3H6, propane C3H8, iso-butane C4H10, n-butane C4H10, iso-pentane C5H12, n-pentane C5H12, n-hexane C6H14, n-heptane C7H16, n-octane C8H18, n-nonane C9H20, methyl chloride CH3Cl, methane CH4, chlorine Cl2, carbon monoxide CO, carbon dioxide CO2, hydrogen H2, steam H2O, hydrogen sulphide H2S, hydrogen chloride HCl, helium He, krypton Kr, nitrogen N2, air N2+O2, ammonia NH3, oxygen O2, sulphur dioxide SO2, xenon Xe. Properties include specific heat constant pressure, specific heat constant volume, specific heat ratio, molar mass, gas constant, gas specific gravity, critical point temperature, critical point pressure, and accentric factor. Use the Result Table option to display a table of properties versus gas type. Tool Inputfluidtype : Fluid TypeCpu : User Defined Specific Heat Constant PressureCvu : User Defined Specific Heat Constant Volumeγu : User Defined Specific Heat RatioSGu : User Defined Specific GravityPcu : User Defined Critical Point PressureTcu : User Defined Critical Point Temperatureωu : User Defined Accentric FactorTool Outputγ : Specific Heat Ratioω : Accentric FactorCp : Fluid Heat Capacity Constant PressureCv : Fluid Heat Capacity Constant VolumePc : Critical Point PressureR : Gas ConstantSG : Gas Specific Gravity Relative To AirTc : Critical Point Temperaturemm : Fluid Molar Mass

WatervelocityinpipeChart

Calculate single phase gas pipeline inside diameter and inside cross section area from pipe diameter and wall thickness. Use the Result Table option to display a table of the inside diameter and cross section area versus either outside diameter or wall thickness. Tool Inputschdtype : Schedule Typediamtype : Diameter TypeODu : User Defined Outside DiameterIDu : User Defined Inside Diameterwtntype : Wall Thickness Typetnu : User Defined Wall ThicknessTool OutputAX : Pipe Inside Cross Section AreaID : Nominal Inside DiameterOD : Nominal Outside DiameterOD/tn : Diameter Over Wall Thickness Ratiotn : Nominal Wall Thickness

Properties include specific heat constant pressure, specific heat constant volume, specific heat ratio, molar mass, gas constant, gas specific gravity, critical point temperature, critical point pressure, and accentric factor.

It's unlikely you'll damage the valve that way. If you do, the valve was already weak and needs replacement anyway. They're easy to replace, and any home improvement store will have replacement valves. Unscrew it from the pipe base using the two-wrench approach as described above. Use teflon tape or plumber's putty to ensure a watertight seal around the threads for the new valves.

See below for images of my Washing Machine valves. This is an older home but can't seem to get the water levers to budge. I don't want to apply too much force either way in fear of breaking something.

Calculatevelocityinpipefrom pressure

Calculate single phase gas properties for common gases: argon Ar, n-decane C10H22, ethylene C2H4, ethyl chloride C2H5Cl, ethane C2H6, propene C3H6, propane C3H8, iso-butane C4H10, n-butane C4H10, iso-pentane C5H12, n-pentane C5H12, n-hexane C6H14, n-heptane C7H16, n-octane C8H18, n-nonane C9H20, methyl chloride CH3Cl, methane CH4, chlorine Cl2, carbon monoxide CO, carbon dioxide CO2, hydrogen H2, steam H2O, hydrogen sulphide H2S, hydrogen chloride HCl, helium He, krypton Kr, nitrogen N2, air N2+O2, ammonia NH3, oxygen O2, sulphur dioxide SO2, xenon Xe.

Fluidvelocity calculator

Flowvelocity calculator for pipe

Give the oil some time to work and try turning again, Valves seem marked with shutoff direction, looks to be to the right.

Calculate single phase gas pipeline density and flowrate. The gas specific gravity is the ratio of gas density over the density of dry air at base temperature and pressure. The compressibility factor is assumed to equal 1 at the base conditions. The gas specific gravity is proportional to the gas molar mass. Tool Inputschdtype : Pipe Schedule Typediamtype : Pipe Diameter TypeODu : User Defined Outside DiameterIDu : User Defined Inside Diameterwtntype : Wall Thickness Typetnu : User Defined Wall Thicknessfluidtype : Gas TypeSGu : User Defined Gas Specific Gravityvoltype : Gas Flowrate TypeQfu : User Defined Gas Volume Flow RateMfu : User Defined Gas Mass Flow RateNgu : User Defined Gas Mole Flow RateVfu : User Defined Gas VelocityP : Gas PressureT : Gas TemperatureZ : Gas Compressibility FactorTool Outputρ : Gas DensityID : Inside Diameter M : Gas Molar MassMf : Gas Mass FlowrateNg : Gas Mole FlowrateQf : Gas Volume Flowrate (At T P)R : Gas ConstantSG : Gas Specific GravityVf : Gas Velocityvg : Gas Mole Volume (At T P)

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Calculate single phase gas pipeline inside diameter and inside cross section area from pipe diameter and wall thickness.

The gas specific gravity is the ratio of gas density over the density of dry air at base temperature and pressure. The compressibility factor is assumed to equal 1 at the base conditions. The gas specific gravity is proportional to the gas molar mass.

It isn't uncommon for this to happen. These valves are really only used when replacing your washer so they have a tendency to freeze up. get some CLR and brush it on the valves to get rid of the corrosion. If you clean off the black handles, you see an arrow that shows which way to turn the valve to shut it off(looks like clockwise). Removing the handles will allow you to get more CLR around the valve stem. Put everything back together and it's OK to apply moderate pressure to operate the valve