PURPOSE: The hydraulic actuator ELMO-GM 15×4/20 is intended for drop-over tank hoisting during repair works.
Name ELMO-GM 15×4/20 interpretation:
ELMO - means electric and assembling equipment;
GM - means assembling hydraulic actuator;
15 - maximum carrying capacity of each post, t;
4 - number of posts in the actuator;
20 - maximum pressure in hydraulic system, MPa.
The hydraulic actuator ELMO-GM 15×4/20 contains a pump unit YG4e1/20 (1 item on fig.1), 4 posts (2.1 - 2.4 items) equipped with hydrocylinders, 8 pump high pressure hoses (3.1 - 3.8 items) and a device for separation drop-over tank and tray (fig.2).

Hydraulic actuator works on coal oil 13 class of cleanness and viscosity from 10 to 400 mm2/c.
| Parameter | Value |
| Maximum pressure in hydraulic system, MPa (kgs/sm2) | 20 (200) |
| Working liquid serve, l/min | 4 |
| Power consumption, not great then, kW | 2,2 |
| Supply voltage | 3х380 V, 50 Hz |
| Operating hydrocylinder effort, t | 15 |
| Hydrocylinder rod working stroke, mm | 500 |
| Tank capacity, l | 35 |
| Weight, not great then, kg | 1300 |
| Nomenclature | Purpose | Quantity |
| The pump unit YG4e1/20 | Providing of necessary specific technological effort in pump fluid of hydraulic system from 0 to 20 MPa | 1 |
| Post SPg15/20-5500 | Providing of necessary effort | 4 |
| The device for separation drop-over tank and tray PK 10x4/50-200 | Separation drop-over tank and tray | 4 |
| Pump high pressure hose (Dу6) Ру 40 MPa, l=10m | Pump fluid feed from the pump unit to the power hydrocylinders | 8 |
| Spare parts, tools and accessories set | 1 |