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Pneumatic Actuator AT 3831

Pneumatic single acting actuator for on-off and control of ball valves and butterfly valves or where 90° rotation is required.

Torque10 Nm to 3145
DrivePneumatic/spring
Suitable for articleAT3502, AT3507, AT3533S, AT3534S, AT3582, AT3585, AT3590, AT2282, AT 2310-2319

Variations

Article number Performance Torque (Nm) air start Torque (Nm) air stop Torque (Nm) spring start Torque (Nm) spring stop Connection to valve ISO 5211 Amount
AT 3831-20 RSK 5354235 Pneumatic double acting 14 10 11 7 F03/05, 9 mm
AT 3831-40 RSK 5354236 Pneumatic double acting 26 17 28 17 F05, 14 mm
AT 3831-80 RSK 5354237 Pneumatic double acting 51 37 47 30 F05/07, 17 mm
AT 3831-130 RSK 5354238 Pneumatic double acting 80 64 64 45 F05/07, 17 mm
AT 3831-200 RSK 5354239 Pneumatic double acting 113 84 107 73 F07/10, 17 mm
AT 3831-300 RSK 5354240 Pneumatic double acting 190 126 193 119 F07/10, 22 mm
AT 3831-500 RSK 5354241 Pneumatic double acting 283 205 268 177 F10, 22 mm
AT 3831-850 RSK 5354242 Pneumatic double acting 488 367 412 271 F10/12, 27 mm
AT 3831-1200 RSK 5354243 Pneumatic double acting 698 502 631 400 F10/14, 36 mm
AT 3831-1750 RSK 5354244 Pneumatic double acting 877 578 983 631 F14, 36 mm
AT 3831-2100 RSK 5354245 Pneumatic double acting 1276 825 1347 896 F16, 46 mm
AT 3831-2500 RSK 5354246 Pneumatic double acting 2454 1861 1882 1184 F16, 46 mm
AT 3831-4000 RSK 5354247 Pneumatic double acting 3312 2142 3145 1796 F16, 55 mm

Product information

Range of Application

Actuator for on-off and control of ball, butterfly and plug valves or where 90° rotation is required.

Program text

UEC.22 Actuators for valve, pneumatic, two position with spring return.
Actuator AT 3831 Pneumatic, single acting for on-off and control of ball valves, butterfly valves, plug valves or where 90° rotation is required.

Quality Assurance

Solenoid valve connection and actuator top acc. to VDE/VDI 3845 (NAMUR).
Mounting flange and stem square drilled acc. to ISO 5211 and DIN 3337.

CE-marking
The actuators meet the demands from PED, AFS 1999:4 §8, The Pressure Equipment Directive and the machine directive, MD 2006/42/EG and ATEX 94/9/EC.

Actuators in the sizes 10 to 300 are classified as category SEP in accordance with the demands from PED 97/23/EC.

Actuators in the sizes 500 to 4000 are classified as category 1.

All Actregs pneumatic actuators are classified for use in potentially explosive atmospheres as Group II Category 2, suitable for zones 1, 2, 21 and 22 in accordance with Annex VIII of Directive 94/9/CE (ATEX).

Certificate from Germanischer Lloyd (GL). Lloyd's register of shipping can be delivered as an option.

Material Specifiation

DetailNoMaterialSurface treatment
1Body1AluminiumAnodized C3 according to EN-ISO 12944-2
2Wing1Carbon steelElectroless nickel plated.
3Springs2-8SteelPre-stressed
4End caps2AluminiumEpoxy coated

Dimension and weight

Actuator

size

38303831
ABCDEFI
101007656332396
201451639676483496
4015819511591564596
8017721713711166551212,5
1301962581471227160158
200225299165135,578701510
300273348,5182152,586801612
50030439719917396851715
850372473221191,5106981515
1200439560249212,51161141615
1750461601280242,51311301615
2100504698313276,51481471615
2500518738383356177,5176,51615
40006309404344152132011615
Measurements in mm, weight in kg

Dimension and weight

Actuator

size

Weight
RØSISOØLMxVØTXU38303831
10912,5F0336M8x5--120,64
201114,7F0442M5x10303171,41,54
401114,7F0442M5x10303172,12,32
801722,5F05/0750M6x105531933,65
1301722,5F05/0770M6x10553223,84,8
2001722,5F07/1070M10x16553235,67,3
3002228,5F07/1070M8x14703298,510,8
5002228,5F10102M10x167033211,2115,36
8502736,5F10/12102M10x178534016,922,2
12003648,5F10/14102M10x1710044925,834,3
17503648,5F14140M16x2610045032,546
21004660,2F16165M20x2613045049,768
25004660,2F16165M20x2913045869,699,9
40005572,5F16/25165M20x30200460129,4

182,9

Measurements in mm, weight in kg

Function and Design

Actuator with linear torque curve. Three point controlled of the pistons for low friction between the body and pistons. Mounting holes according to ISO 5211 and DIN 3337, for standardized mounting to the valve. End caps with adjustable screws for stroke length (5°). Mechanic end points as a standard. The piston force is transfered through the rotary axle to the valve stem (90° + 1°-0,5°). Actuator top and solendoid valve connection according to NAMUR (VDE/VDI 3845).

Actuators Actreg AT 3831 single acting:
The actuator is provided as a standard with spring closing function. If a spring opening function is required this has to be stated when ordering.

Technical Information

Pressure:Supply pressure max 8 bar (e). Higher pressure on demand.
Temperature:-30°C to +100°C. Other ranges on request.
Manoeuvre medium:Air or inert gases, purity at least 40 micron.
(No requirements of mist lubrication). Oil or water.

Torque (Nm) AT 3831 singel acting

ActuatorAir Pressure (bar)
Standard spring set678Spring return
StartStopStartStopStartStopStartStop
AT 3831-20141017132017117

AT 3831-40

2617332440302817
AT 3831-805137645077634730
AT 3831-130806499841191036445
AT 3831-2001138414211317214310773
AT 3831-300190126238175287223193119
AT 3831-500283205355277427349268177
AT 3831-850488367607487727607412271
AT 3831-12006985028716751044848631400
AT 3831-1750877578111381313481049983631
AT 3831-2100127682516381187200015491347896
AT 3831-250024541861303124383608301518821184
AT 3831-400033122142411529454423325431451769

Air consumption

ActuatorOperating time in s. at 8 bar ADA/ASRCylinder volume in liters
OpenCloseOpenClose
100,030,070,0350,028
200,04 / 0,120,09 / 0,180,130,09
400,08 / 0,20,08 / 0,290,270,23
800,11 / 0,270,1 / 0,40,640,47
1300,15 / 0,320,15 / 0,50,770,76
2000,15 / 0,50,22 / 0,61,191,2
3000,3 / 0,70,4 / 0,851,961,73
5000,4 / 0,90,5 / 1,12,952,74
8500,8 / 2,20,9 / 2,64,73,86
12001,2 / 2,31,5 / 2,86,954,64
17501,8 / 2,82 / 3,29,89,3
21002,3 / 3,32,6 / 3,711,610,2
25002,8 / 3,83,1 / 4,23225
40003 / 4,33,5 / 533,227,5

Dimensioning AT 3831 spring-closing, standard spring set no. S14

Actuator size20408013020030050085012001750210025004000
Ball valve
AT 3502-3552DN8-202532-40506580100-125150-250
AT 3533A-3534ADN10-152025-3240-506580-100
AT 3582-3585DN15-2025-324050-6580100

125

150200250300
Butterfly
AT 2282DN80-100125150-200250300350
vidDp 10 bar
AT 2310-2344DN50-6580100125-150200250-300350-400450500600-700
vidDp 10 bar

The dimensioning is general and based on an available operational pressure 6 bar. The table does not take variations in operational conditions in to account. The conditions could impact the torque. Dimensioning for abnormal operational conditions can be acquired on demand. This also applies to AT 3810.
For AT 3507 and AT 3527: Go up one actuator size, I.E. a valve DN50 should be dimensioned after DN65 in the tables above.

Accessories and Options

Accessories

  • Visual position indicator.
  • Emergency gear shift between actuator and valve.
  • Internally connected pressurized air tank for emergency operation.
  • Block for control timing
  • Valve block for air evacuation from the acuator without dissassembly of the control air lines.
  • Inductive or mechanical limit switch.

Installation

The actuator can be installed indoors or outdoors in any position. All though mounting the valve with the air connections upwards should be avoided to minimze the risk of water and dirt to get inside of the valve.

Maintenance and spare parts

The actuator should be disconnected electrically and pneumatically before assembly or dissassembly is started. The actuator should be mounted with even spaced distances.

Spare parts
The repair kit includes the neccessary soft parts.

Marking

Article number, series number, max allowed operation pressure.
Manufacturer
CE-marking

How to order

Example: AT 3830-40/ 3831-40
AT 383140
Fig. nrSize

Accessories

Solenoid valve AT 3816

Solenoid valve for control of in and outgoing air to pneumatic actuator.

Select

Inductive sensor AT 3817, 3830IND

Inductive sensor for pneumatic actuators AT3830, 3831

Select

Positioning AT 3839

Digital positioner

Select