DARV10-20 Relief, Direct-Acting Poppet

DESCRIPTION

A screw-in, cartridge-style, direct-acting, poppet-type, hydraulic relief valve intended for use as a pressure limiting device for common hydraulic circuit protection.

OPERATION

The DARV10-20，blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the poppet from its seat. The cartridge offers fast response to load changes in typical hydraulic circuits requiring low internal leakage. NOTE: The DARV10-20 may be used in cross-over relief applications (back pressure on 2 with the use of the “C” double back-up ring seal option. See Ordering Table.

FEATURES

● Adjustments cannot be backed out of the valve.

● Adjustment options A, B, and C: positive stops prevent springs from going solid.

● Optional spring ranges to 248 bar（3600 psi）.

● Rapid response to pressure changes.

● Compact size.

RATINGS

Operating Pressure:228 bar（3300 psi）

Flow:The Performance Chart illustrates flow handling capacity at maximum setting for each spring range option. Pressure rise will vary with spring (range) and with setting within range due to flow forces. Consult factory for specific flow characteristic values.

Internal Leakage: 0.25 cc/minute (5 drops/minute) max. to 80% of nominal setting

Crack Pressure Defined: bar (psi) evident at 0.95 lpm (0.25 gpm) attained

Reseat Pressure：Nominal 90% of crack pressure

Standard Spring Ranges：Due to manufacturing tolerances, it may be possible to adjust the valve either lower or higher than the nominal ratings shown below.

Fluids:Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 ssu)

Temperature:-40℃～ 120℃

Cavity：