RTK MV 52xx / MV 54xx Emergency

Two or three-way actuated emergency globe valve for steam and other process liquids

RTK product range includes electric actuated control valves with integrated emergency closing device. Closing speed, means closing time is adjustable. Hydraulic cylinder with built-in spring located between the electric actuator and the valve. The spring in the cylinder will be pressurised simultaneously while the actuator moves until its limit switch responds. While pressurising the pressure chamber below the piston is filled completely with oil over the channel beside the piston. The chamber is shut off with the solenoid valve (NO), which is closed via safety circuit (controlled by relay board RElog) and the piston is fixed on its position. The valve spindle and plug are now operated by the actuator. If the safety switch drops or there is a power failure, the solenoid valve will open the chamber. The oil flows from the pressure chamber into the upper storage chamber. This causes the spring to release and together with the pressure difference at the plug, closes the valve. By case of three-way valves, or mixing or diverting type, it closes port B.

Have any questions about the product?
Valve Operation Principle

Electric actuated two or three-way globe type control valve with hydraulic emergency closing unit | Adjustable closing time | Closes at power failure


DN 15-250


DIN PN 16-160


Cast Iron, Ductile Iron, Cast Steel, Stainless Steel, Creep Resistant Cast Steel


Media temperature: up to 300°C

Leakage Class

Class IV


Flange, Butt weld by request

Available by Request

Bellow, Stellited plug, Mixing or diverting plug, Stellited seat, Ferro-titanium trim, Soft seat, Flanges with groove, Gas packing acc. DVGW, Oxygen version, Stem heater versions, QCS (Quick Change Seat) versions

Actuator Options

3 step control, I/O 0/4-20mA, 0/2-10V, Profibus DP, additional limit switches, anti-condensation heater, integrated single loop PID controller, RElog for automatic startup

Supply voltage: 24 / 115 / 230 VAC, 24 VDC



Country of Origin


Industry Sectors

Biotechnology, Chemical, Boiler and Power Plants, CHP, Breweries, Building materials, Distilleries, Food and Beverage, Hospitals, Mining, Metallurgy, Oil&Gas, Refineries, Pharma and cosmetics, Pulp&Paper, Textile, Laundries, Timber, Pelletizing, Tire, rubber and plastic, Water and wastewater


Air, Gas, LPG, Vapours, Bitumen, Petroleum products, Condensate, Superheated water, Crystallizing Fluidums, Ethanol, Bioethanol, Neutral and Agressive Liquids, Steam, Superheated steam, Thermal Oil, Water and Wastewater