КГ-3У single-sided hydraulic lock

Intended for ensuring a single-way passage for working fluid flow and locking the reverse flow without control action applied; with control action applied – for dual-way fluid flow.

Implemented in hydraulic props of powered roof supports:

• For feeding and closing the hydraulic props cavities in setting load mode.
• For unloading head ends of hydraulic props during powered roof support units movement.
• For locking and unloading head ends and rod ends of hydraulic advancing cylinders responsible for powered roof support units movement.

Main parameters КГ-3У Internal diameter, mm 8 Nominal valve setting pressure, MPa 50 Nominal pilot pressure, MPa 10 Weight, kg 0,38

Working fluid	Installation and connecting dimensions
Any oil-water sludge permissible to use in coal mining facilities, with purity class grade 15 and higher according to GOST 17216, and industrial oils with the same purity class. Developer: DONGIPROUGLEMASH Institute