... system from over-load,which make system keep constant. Pressure limiting valve prevent lubricate system from over-load,which make ... system keep constant. it is widely used to system of pressure lubricate of machinery, petroleum,chemical, fertilizer, power and ... technic parameterinside nominal diameter——φ6(mm) Opening pressure——22(kgf/cm2)Working pressure——22~44(kgf/cm2)rated flow——9.6 ...