Hydraulic Disc Brake


PZ Series Hydraulic Disc Brake


Redundancy design is adopted, and which can provide safe and reliable braking torque for the drilling rig.

The control system adopts valve block embedded connection structure, which can reduce quantity of external hose.

By virtue of working brake, parking brake, over-roll protection, and emergency brake functions, and it also has automatic protective functions for power, air and hydraulic failures.

Equipped with the dual electric pumps and multi-accumulator, and also equipped with the hand pump, heater unit and cooling system, which can supply the reliable hydraulic power for the hydraulic disc brake.


In the field of oil and gas equipment, the hydraulic disc brake is mainly used as the main brake for drilling drawworks of the workover rig and the rig.


The commonly used product models of the PZ series hydraulic disc brake are as follows: PSZ65,3150L,PSZ75A,BK-0-6A,PSZ65,PSZ75B-2-07.5,PSZ65-2-00,PSZ75B,BK-7-7B,PSZ75-2-00,BK-7-6C,PSZ65-3-00,PSZ75-3-03,BK-12-7A,BK-1-6A,BK-1-7A,PSZ75,PSZ80,PSZ65-2-01,PSZ75A-2-01,PSZ75B,BK-12-7A,PSZ75B-3-03,etc.

Main Technical Specifications

Model PZ30 PZ40
Service Caliper Max. force of Each Side, kN(lbs) 50(11,110) 75(16,660)
Effective Stroke, mm(in) 30(1.18) 30(1.18)
Min. Rated Thickness of Brake Pad,mm(in) 12.7 (0.5) 12.7 (0.5)
Safety Caliper Max. force of Each Side, kN(Ibs) 50(11,110) 90 (20,000)


Rated Pressure, MPa(PSI) 6 (870) 6 (870)
Volume of Reservior, L(gal) 150 (40) 150 (40)
Power of Motor, kW(HP) 2×2.2 (2×3) 2×2.2 (2×3)
Volume of Accumulator, L(gal) 4×6.3 (4×1.66) 4×6.3(4×1.66)