Pressure-release valve HKP 100 /ГКП 100/

Pressure-release valve HKP 100 is designed for protection from mining pressure of hydraulic props and hydraulic jacks of powered supports, as well as other mining machines.

Comparative table of main parameters for pressure-release valves HKP 100 and KPS /КПС/
(serial production since 2003)

 Predominant features of pressure-release valve HKP 100 as compared to KPS:
1. The capacity is increased by 10 times, which provides protection of hydraulic power units and the structure of the powered support in case of the sudden top subsidence and roof fall.
 2. The resource and reliability of operation are increased, which leads to the reduction of repair costs.
3. The number of precision components is reduced by 15%, which leads to a reduction in the cost of the valve.
       This valve is interchangeable with the KPS valve. The design of the KPS valve ensures simple assembly and easy extraction from the hydraulic block.

Locking valve HUK12 /ГУК 12/

Locking valve HUK 12 is designed for the hydraulic system of powered supports and other mining machines in order to increase the flow of the power fluid in one direction and to lock it in the opposite direction until the hydraulic control impulse is applied, opening the locking valve for the flow in both directions.

Comparative table of main parameters for HUK12 и KHU-3U /КГУ-3У/ (serial production since 1981)

Predominant features of the locking valve HUK12 as compared to KHU-3U:
 1. The throughput capacity is rased by 1.5 times that increases the speed of movement of the powered support by the combine and valve of the conveyor line, thereafter the amount of coal produced is increased.
2. The resource and reliability of operation are increased, which leads to the reduction of repair costs.
3. The number of precision components is reduced by 20%, which leads to a reduction in the cost of the valve.
4. This valve is interchangeable with the KHU valve. The design of the HUK valve ensures simple assembly and easy extraction from the hydraulic block, that simplifies and speeds up the work.

Directional control hydraulic valve HRP12

Directional control hydraulic valve HRP12 is designed for local (manual) control of working bodies (hydraulic props, hydraulic jacks, hydraulic expansion toolholders) of powered supports and other mining machines.

Comparative table of main parameters for directional control hydraulic valves HRP12 and RSD-05
/РСД-05/ (serial production since 1998)

HYDRAULIC JACKS

Hydraulic jacks are part of the powered support and are designed for pulling out of shields of the powered support during adjustment of position of the sections and their folding; perform the functions of moving the sections, basic elements, conveyor, moving-out or moving elements of the overlap, etc. Hydraulic jacks carry out movement, position regulation and fixation of the powered supports, working in the underground conditions without restrictions in mining and geological field.

By the nature of the work, hydraulic jacks have single-sided or double-sided action. By the nature of the design - single and double extention. Hydraulic jack with single extension are most widely used. The of a hydraulic jack is equal to the width of the extracting machine or a multiple of it.

Hydraulic jacks are made of qualitative constructional carbon steels of marks: Steel 45, Steel 35 of the National State Standard /ГОСТ/ 1050-88; constructional alloyed steels of marks: 30KHHSA /30ХГСА/ of the National State Standard 4543-71. Surfacing is made by surfacing wire of the mark Boehler AWSER 307. For assembly and welding operations MR-3 Monolith /МР-3 Монолит/ electrodes and ATOM 307 Si welding wire are used. Welding is performed in shielding gas environment. PF115 enamel of the National State Standard 6465-76 is used for lacquer coating. The hydraulic fluid for hydraulic jacks is Emulsol E2-ED-3 /Е2-ЕД-3/.

The main indicators and characteristics of hydraulic jacks meet the requirements of the National State Standard R 55157-2012, the National State Standard 151850, the National State Standard 16514. 

*32 Operating pressure, MPa

Hydraulic props

Test methods