return valve

noun 0.826

ball valve

noun 0.786

valve

noun 0.748

suction valve

noun 0.728

demand valve

noun 0.725

safety valve

noun 0.722

heart valve

noun 0.721

relief valve

noun 0.702

needle valve

noun 0.699

microvalve

noun 0.688

piston valve

noun 0.676

valvula

noun 0.674

exhaust valve

noun 0.664

reversing valve

noun 0.638

poppet valve

noun 0.638

valva

noun 0.632

semilunar valve

noun 0.630

tricuspid valve

noun 0.609

ileocecal valve

noun 0.597

thermionic valve

noun 0.588

valve train

noun 0.582

stopcock

noun 0.576

floodgate

noun 0.556

vacuum pump

noun 0.549

backflow

noun 0.540

seacock

noun 0.539

positive displacement pump

noun 0.532

pressure vessel

noun 0.531

blowout preventer

noun 0.530

water hammer

noun 0.528

bilge pump

noun 0.527

ballcock

noun 0.525

vacuum gauge

noun 0.523

pump

noun 0.521

lock gate

noun 0.520

sump pump

noun 0.516

lift pump

noun 0.514

airlock

noun 0.509

air pump

noun 0.508

ventilator

noun 0.507

bivalve

noun 0.504

univalve

noun 0.501

vacuum tube

noun 0.500