Feed pump engines, AZ-2sM, AZE-3 and AZE-5 are designed mainly for feeding the working fluid into self-advancing long-wall supports, as well as other hydraulic equipment in the mine. They can be used in central pumping stations as well as for feeding covers which require two dimensions of feeding pressure:
• 25-32 [MPa] - for supports (props)
• 12-16 [MPa] - for self-advancing supports transport

They can be also used where there is requirement for efficiency 200 or 400 [dm3/min.] and nominal pressure up to 32 [Mpa].

Feed pump engines comprise of two pumping assemblies working in parallel, one or two water/oil emulsion tanks, high-pressure filters and low-pressure filters.
The pumping units, constituting components of the pump engines, after appropriate small remodelling, may also be used separately in systems designed for water pumping into the unmined coal during coal bed moistening, as well as for wet blasting with the bore high-pressure water filling method.


AZ-2sM

Specifications and working data:

• Engine output Q = 2 x 100 [dm3/min]
• Working pressure P = 32 [Mpa]
• Type of working fluid: water/oil emulsion with 0.7÷2 emulsifying oil content
• Power of drive motors N = 2 x 55 [kW]
• Power voltage U = 500 [V], 1000 [V], 1140 [V]
• Frequency f = 50 [Hz], 60 [Hz]
• Total capacity of the tanks V = 1200 [dm3]
• Working capacity of the tanks Vr = 1000 [dm3]
• Throughput of set of filters on the main feed Qf = 3 x 100 [dm3]
• Pressure reducing valve adjustment range Pzr = 4÷25 [MPa]
• Length of complete engine L = 8500 [mm]
• Pump unit weight m = 1570 [kg]
• Weight of empty tanks m = 608 [kg]
• Weight of complete pump engine with accessories and electrical equipment m = 4825 [kg]

Upon the customer’s request we may adapt the pump for work with different working pressure parameters.