HPU Accumulator charge time

[Aus02]

I know very little about hydraulic systems but am looking at one for closure of ESD valves.

We have pumps (not normally running) and accumulators which will provide system volume to move valves.

I'm wondering about the criticality of the charge time of these accumulators. The duty pump kicks in when system pressure drops by a certain amount to re charge the system and accumulators. I'm wondering what the time to charge the system back to the required pressure should be, if this is important and why?

Thanks

 

[hydtools]

Generally not very much time. It depends on the size of the accumulators or the charge volume is and the delivery volume of the pump. If the charge volume is 5 gals. and the pump can deliver 5 gpm at pressure then charge time is one minute. Assuming no other function is consuming the pump flow when the accumulators are being charged.

Ted

 

[insult2injury]

Typically, these pumps would run when the system pressure dropped to the minimum pressure that would still allow the valve to actuate and turn off when the maximum operating pressure is reached. If this is the case, then the charge time is not critical as the valve should always be available. The pump be capable of moving more fluid than the amount discharging/leaking causing the drop in system pressure.

I2I