Type series booklet 8556.11/3--10 DYNACTO 12 to 400 Spring return hydraulic actuators DYNACTO 12, 25, 50 and 100: rack and pinion kinematics DYNACTO 200 and 400: scotch--yoke kinematics Output torques up to 4000 Nm

DYNACTO 12 to 400 2 General features Designed for the operation of ¼ turn valves (butterfly valves, ball valves, …), the DYNACTO series of spring return hydraulic actuators develop output torques up to 4000 Nm. The production range consist of 7 units: -- DYNACTO 12, DYNACTO 25, DYNACTO 50 and DYNACTO 100, based on rack and pinion kinematics, -- DYNACTO 200 and DYNACTO 400, based on scotch--yoke kinematics. In standard version, these actuators can be submerged under 30mof water (soft water or sea water), in crude oil or other products (protection degree equivalent to IP 68). They are equipped...

DYNACTO 12 to 400 3 Adaptation on valves The interface for connection onto the valve meets the requirements of standard ISO 5211. Generally adaptation is made directly, via an adaptation flange is required. Equipped with an interchangeable insert, they can be easily mounted on different valve shaft end (square shaft end, flat shaft end, keyed shaft). They can be positioned in four positions, at intervals of 90° . mm ISO 5211 Maximal allowable dimensions for the shaft Actuator mounting plate* Driving by square Driving by flat Driving by key Height DYNACTO 12 F07 et F10 19 19 35 DYNACTO 25 F10...

DYNACTO 12 to 400 4 Operation DYNACTO 12 to 100: rack and pinion kinematics The rack and pinion kinematics develop a linear output torque. Themovement of the rack/piston secured by the control fluid pressure causes a¼turn rotation of the pinion integral with the valve shaft: the pressure ensures at once the valve operation and the compression of the spring cartridges. The spring cartridges reset the valve in safety position when the pressure is cut--off. Curve of the rack and pinion kinematics Closing by lack of control fluid Opening by lack of control fluid Output torque End 0° 45° 90° 0° 45°...

DYNACTO 12 to 400 5 DYNACTO 200 and 400: yoke and slide kinematics The yoke and slide kinematics develops variable output torque very well suited to the operation of¼turn valves with hydrodynamic torque. The movement transmission is achieved by means of the piston system .., the slide operating nut .., the rolling pad .. and the yoke ... The translation of the piston .. secured by the pressure in the actuator cylinder causes the linear travel of the operating nut ... This movement drives the sliding of the pads .. in the 2 slides of the operating nut .. and allows the rotation of the yoke .....

DYNACTO 12 to 400 6 Version with closing upon missing oil pressure Opening by control oil pressure Actuator/Valve closed Actuator/Valve open Actuator/Valve open Actuator/Valve closed Closing operation under springs action Opening operation under springs action Closing by control oil pressure Version with opening upon missing oil pressure Actuator/Valve open Actuator/Valve closed Actuator/Valve closed Actuator/Valve open P P E E P P E E

DYNACTO 12 to 400 8 DYNACTO 12 to 100 – Construction Item Designation Materials 103 Housing ASTM A536 gr.60--40--18 * ductile iron 310.1 Self--lubricating bearing Steel + bronze + PTFE 310.2 .. Self--lubricating bearing Stainless steel + PTFE 310.3 .. Self--lubricating bearing Stainless steel + PTFE (25, 50 and 100 series) 310.4 Self--lubricating bearing Stainless steel + PTFE (only 200 serie) 411.1 Sealing washer Copper 411.2 .. Sealing washer Copper 412.1 .. O--Ring Nitrile 412.2 .. O--Ring Nitrile ** 412.3 .. O--Ring Nitrile ** 412.4 .. O--Ring Nitrile **(50, 100 and 200 serie) 412.5 .. O--Ring...

DYNACTO 12 to 400 10 DYNACTO 200 and 400 – Construction Item Designation Materials 103 Housing JL 1040 cast iron or JS 1030 ductile iron 141.1 Cylinder ASTM A536 gr.60--40--18 ductile iron 141.2 Cylinder ASTM A536 gr.60--40--18 ductile iron 142 Cover JL 1040 cast iron or JS 1030 ductile iron 176.2 Cylinder head Steel 310.1 .. Self--lubricating bearing Stainless steel + PTFE 310.2 .. Self--lubricating bearing Stainless steel + PTFE 310.3 Self--lubricating bearing Stainless steel + PTFE 310.4 Self--lubricating bearing Stainless steel + PTFE 412.1 .. O--Ring Nitrile * 412.2 .. O--Ring Nitrile *...

DYNACTO 12 to 400 12 Mounting on valves The actuator can be positioned in four positions, at intervals of 90° . When the actuator is supplied on a valve and unless otherwise stated on the order, the actuator is mounted according to the arrangement N position1. If the actuator is equipped with a declutchable manual override, the actuator is mounted in accordance with the arrangement M position 2. DYNACTO 12 to 100 Arrangement N Arrangement M Position 1 Position 2 Position 1 Position 2 Flow pressure direction on the valve DYNACTO 200 and 400 Arrangement N Arrangement M Position 1 Position 2 Position...

DYNACTO 12 to 400 13 External coating -- Protection Standard protection: • anti--corrosion primary coating (cataphoresis), thickness 20--25 ìm. • anti--corrosion secondary coating by polyurethane paint, thickness 125 ì, colour dark grey RAL 7016. This protection has been tested in our laboratories for use in saline fog, according to NFX 41--002 standard. Submersible actuators : • anti--corrosion primary coating (cataphoresis), thickness 20--25 ìm. • anti--corrosion finition touch by bituminous epoxy paint, thickness 80--100 ìm, colour black. This protection has been tested in our laboratories...

DYNACTO 12 to 400 14 Indication function Limit switch box AMTROBOX--R This limit switch box is made of cast iron with a suitable corrosion resistant coating. Open/close detection and position feedback: -- On/off position detection by means of microswitches or inductive proximity detectors (1/O, 1/C, 1 on intermediate position on request). -- Proportional distribution for resistive angular position sensor, (voltage or 4--20 mA pilot). Enclosure protection: IP 67 Options: -- Intrinsically safe version EEx--ia IICT6 -- Visual indication of valve position by flag. Consult type series booklet ref....