
Safety Hydraulic Valve with Unloading Function PKR-787 for Pressure Management
Manufacturer:
APZ OJSC
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Description
The hydrovalve is designed for protection of volumetric hydraulic drives from pressure exceeding the set pressure, as well as for unloading of hydraulic systems in case of triggering of safety devices in hydraulic systems of construction, road and municipal machines. The hydrovalve is an indirect-acting safety valve of cartridge design, built into the housing, which also houses the hydraulic valve BE6. Unloading of the hydraulic system is provided by the hydraulic valve BE6, controlled by a DC solenoid, voltage 12, 24 V.
Specifications
Working fluid flow rate (minimum)
PKR-787: not less than 20l/min; PKR-787-02: not less than 20l/min; PKR-787-03: not less than 20l/min; PKR-787-04: not less than 20l/min.
Working fluid flow rate (maximum)
PKR-787: not more than 200l/min; PKR-787-01: not more than 20l/min; PKR-787-02: not more than 200l/min; PKR-787-03: not more than 200l/min; PKR-787-04: not more than 200l/min.
Working fluid flow rate (nominal)
PKP-787: 160l/min; PKP-787-01: 15l/min; PKP-787-02: 160l/min; PKP-787-03: 160l/min; PKP-787-04: 160l/min
Inlet pressure (minimum)
PKR-787: not less than 2MPa; PKR-787-02: not less than 2MPa; PKR-787-03: not less than 2MPa; PKR-787-04: not less than 2MPa
Inlet pressure (maximum)
PKR-787: not more than 30MPa; PKR-787-01: not more than 3,75MPa; PKR-787-02: not more than 30MPa; PKR-787-03: not more than 25MPa; PKR-787-04: not more than 25MPa
Inlet pressure (nominal)
PKR-787: 25MPa; PKR-787-01: 2,5MPa; PKR-787-02: 25MPa; PKR-783-03: 20MPa; PKR-787-04: 20 MPa
nominal passage
20 mm
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