DARV10-26 Relief, Pilot-Operated Spool

DESCRIPTION

A screw-in, cartridge-style, pilot-operated (two-stage), spool-type hydraulic relief valve, intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response and low hysteresis.

operation

The DARV10-26 ，blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the piloting relief off its seat, allowing the main (second stage) spool to shift, opening 1 to 2 . The cartridge offers smooth transition in response to load changes in demanding hydraulic circuits.

NOTE：DARV10-26 cannot be used in crossover relief applications.

FEATURES

● Adjustments cannot be backed out of the valve.

● Adjustments prohibit springs from going solid.
● Hardened spool and cage for long life.
● Optional spring ranges to 210 bar（3000 psi）.
● Fast, smooth response to pressure surges.
● Industry common cavity.

RATINGS

Operating Pressure:240 bar（3500 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: 115 cc/minute (7 cu. in./minute) max. to 85% of nominal setting
Crack Pressure Defined: Setting Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure：Nominal 90% of crack pressure
Standard Spring Ranges: 6.9 ～ 27.6 bar (100 ～ 400 psi） 10.3 ～ 103.4 bar（150 ～ 1500 psi） 27.6 ～ 206.9 bar（400 ～ 3000 psi）
Temperature:-40℃～ 120℃
Fluids:Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 ssu)

Cavity: