Decompression Type (PDF)

The feature of PDF serial Prefill valve is compact and easy to assemble, capable of enlarging the flow without leaking.

Besides, dump valve is available to once swich on but without additionally assembling. The lowest pilot pressure when dumping only 12-17% of main cylinder.

The function of Pre-fill valve PF series is a drain valve between hydraulic cylinder and tank.

During operation in a large pressure mechanism, it needs to suck oil from tank to hydraulic cylinder to tank. when reversion, hydraulic cylinder will make oil draining to tank.

*Flange on Port
FPT: With flange on port P, T
FP: With flange on port P
FT: With flange on port T

add to Inquiry Cart Model Valve Size Flange on Port Pressure Adj. Range Max. Flow


2" FPT / FP / FT 48.5 kg/cm2 250 L/min


3" FPT / FP / FT 42.3 kg/cm2 400 L/min


3-1/2" FPT / FP / FT 34.19 kg/cm2 630 L/min


4" FPT / FP / FT 39.45 kg/cm2 1000 L/min


5" FPT / FP / FT 33.3 kg/cm2 1600 L/min


6" FPT / FP / FT 29.5 kg/cm2 2500 L/min