HYRV10-28 (Pilot Operated Relief Valve)

A cartridge-style pilot-operated poppet-type relief valve.

Description:

A cartridge-style pilot-operated poppet-type relief valve.

 

Operation:

The valve prevents flow from ① to ② until pressure at ① exceeds the set crack pressure and opens the pilot section. The pilot flow creates a pressure differential across the poppet which causes the valve to open allowing flow from ① to ② protecting the circuit from over pressurization.

 

Specifications

Operating pressure:

240 Bar

Flow:

7.6 ~ 113.6lpm (2 ~ 30 gpm)

Internal leakage:

Max 80% of nominal setting, maximum internal leakage is 0.5 ml/min (10 drops/min)

Reseat pressure:

90% of crack pressure (crack pressure at 7.6 lpm/ 2 gpm)

Pressure rise:

At 240bar (3500psi): 0.15 bar/ lpm (8 psi/ gpm)

Response time:

RV to CV at 250 bar/ 53 lpm (3500 psi/ 14 gpm), response is 0.6 seconds.

Opening pressure of check valve:

2.1 Bar (30psi)

Response time of check valve:

CV to RV at 250 bar/ 53 lpm (3500 psi/ 14 gpm), response is 0.3 seconds.

Temperature:

(-54℃ to +135℃) with NBR material seals

Fluids:

Mineral-based fluids with viscosity of 7.4 to 420 cSt.

Cavity:

HY10-2, see page G.1.3

Body material:

Steel & ductile iron rated to 350 bar

 

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