Integrated functions

HPI motors incorporate hydraulic functions such as :

• Pressure relief valve
• Pressure relief valve controlled by electro-poppet-valve or proportional valve
• Anti-cavitation poppet valve

Motors with inbuilt functions
Controlled pressure relief valve with internal return	Pressure relief valve controlled by EV	Pressure relief valve and flow limiter
Resupply valve	Direct action high pressure pressure relief valve with internal return	Pressure relief valve controlled by EV and resupply valve
	Pressure relief valve controlled by thermostat

This technology allows complete systems to be supplied, such as the Hydraulic Motor Control, which reduces our customers' integration time and costs.

HPI thus proposes a set of solutions adapted for the speed regulation for hydraulic motors driving ventilator screws :

• Anti-cavitation function
• clutch release of the drive by electrovalve
• Speed Regulation function by hydraulic temperature sensor
• HMC*: an electronic regulation function by proportional valve controlled by electronics integrating data from several temperature sensors

(*) Hydraulic Motor Control : an exclusive HPI feature