Hydraulic Disc Brake

Description
Hydraulic disc brake has working brake, parking brake, over-roll protection, an emergency brake and other functions so as to meet drilling process requirements to the fullest extent. It also has automatic protective functions for power, air and hydraulic failures.

Features
1. A redundancy design is adopted to provide safe and reliable braking torque for the rig.
2. The hydraulic station is equipped with the dual electric pumps and multi-accumulator, the hand pump, heater and cooling system supply the reliable hydraulic power.
3. The control system is valve-embedded to reduce external pipes.

Parameters of Hydraulic Disc Brake

MODEL		PZ30	PZ40	PZ50	PZ70
Max. positive pressure on one side(Ibf)	11240.45	16860.67	20232.80
	Effective stroke (in)	1.18
	Min working thickness allowed for brake shoe(in)	0.47
	Overall dimension(in)	Φ5.90×9.52	Φ7.08×11.41
	Weight(Ib)	39.68	55.11
Safety tong	Max. positive pressure on one side(Ibf)	11240.45	20232.80
	Overall dimension(in)	Φ7.48×12.99	Φ8.26×13.97
	Weight(Ib)	77.16	105.82
Hydraulic system	Rated pressure(psi)	857		1143
	Summer	L-HM46 Anti wear hydraulic oil
	Winter	L-HV32 Low temperature anti wear hydraulic oil
	Rated flow rate of single pump (ft3/min)	0.63
	Oil tank volume (ft3)	5.30
	Motor power(hp)	2.95
	Accumulator capacity (ft3)	4×0.22
	Heater power(hp)	1.34
	Cooling water flow rate(ft3/h)	70.63
	Overall dimension(ft)	3.93×3.44×4.21
	Weight(Ib)	1675.51

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