Pressure relief valves for preventing excessive pressurization in positive displacement pumps; electronic controller for controlling rotations per minute (RPM) of hydraulically-balanced diaphragm pumps; power adaptors; industrial calibration sensors; calibration devices for calibrating diaphragm pumps, positive displacement pumps, metering pumps, non-metallic centrifugal pumps, driven diaphragm pumps, peristaltic pumps, or solenoid driven diaphragm pumps; calibration columns

'adaptor':27 'balanc':23 'calibr':29,31,34,57 'centrifug':45 'column':58 'control':13,15 'devic':32 'diaphragm':24,35,48,55 'displac':10,38 'driven':47,54 'electron':12 'excess':6 'hydraul':22 'hydraulically-balanc':21 'industri':28 'metal':44 'meter':40 'minut':18 'non':43 'non-metal':42 'per':17 'peristalt':50 'posit':9,37 'power':26 'pressur':1,7 'prevent':5 'pump':11,25,36,39,41,46,49,51,56 'relief':2 'rotat':16 'rpm':19 'sensor':30 'solenoid':53 'valv':3

Diaphragm pumps; positive displacement pumps; non-metallic centrifugal pumps; pumps, namely, motor driven hydraulically balanced diaphragm pumps; peristaltic hose pumps; solenoid driven diaphragm pumps; pump control valves; valves as machine components; pulsation dampeners to reduce machine vibration

'balanc':16 'centrifug':9 'compon':32 'control':27 'dampen':34 'diaphragm':1,17,24 'displac':4 'driven':14,23 'hose':20 'hydraul':15 'machin':31,37 'metal':8 'motor':13 'name':12 'non':7 'non-metal':6 'peristalt':19 'posit':3 'pulsat':33 'pump':2,5,10,11,18,21,25,26 'reduc':36 'solenoid':22 'valv':28,29 'vibrat':38

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