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ROTARY ACTUATOR TYPE MD

PNEUMATIC DIAPHRAGM ACTUATOR

SMART IN FLOW CONTROL

For automatic actuation of industrial valves

e.g. rotary plug valves, ball valves, butterfly valves

 

back to overview rotary actuators →

 

↓ Mounting kits (attachment kits)

↓ Mounting methods and positions

↓ Accessories

→ Documentation/Certificates

Technical data

Application Control and on/off application
Sizes - standard MD450, MD700
Sizes - with reinforced springs MD450v, MD700v
Design Diaphragm; single-acting; internal springs, decentrally located
Actuator movement rotary
Rotary angle 0 to 75° (optimally matched to VETEC rotary plug valves)
Power supply Pneumatic
Control air range 3 to 6 bar
Safety function Reversible without additional components: Spring force closes (FC) / Spring force opens (FO)
Diaphragm area 1636 to 3447 cm²
Torques 679 to 8247 Nm
Nominal stroke 100 to 130 mm
Permissible ambient temperature -40 to +80 °C
Differential pressures for actuator sizing TY005.069
Swing angle limitation (optional) Externally adjustable mechanical end stops
Interface to valve According to DIN EN ISO 5211 or VETEC standard
Interface for attachments In accordance with VDI/VDE 3845-1 (EN 15714-3) and VDI/VDE 3847-2 (IPM attachment kit)
Conformity EAC
Modulating duty (without manual override)

Actuator

 

Modulating and manual operation (for actuators with manual override)

Actuator with manual gearbox

 

Mounting kits (attachment kits)

The attachment kit is the link between valve and rotary actuator with an interface according to DIN EN ISO 5211 or VETEC standard and contains the following components:

 

  • Console or bracket → depending on valve series
  • Lever kit
  • Screws for fastening to the valve
  • Screws for mounting the actuator
  • Optional mechanical end stops ( rotation angle limitation)
  • Position indicator
  • Protective cover (cover plate)
Mounting kit with connections according to DIN EN ISO 5211 for valve series 82
Mounting kit with connections according to VETEC standard for valve series 72, 73
Assembly kit actuator with manual gearbox

Mounting arrangements (mounting positions of the actuator) and mounting positions

Mounting arrangements

For mounting the actuator type MD to the valve, we recommend mounting types B and D.

Mounting types A and C on request!

Exemplary illustration of attachment type B. For other attachment types, see data sheet TY005.008.

Actuator
Actuator with manual gear box

FC = Spring closes • FO = Spring opens • FTO = Medium opens (flow from the front, from the seat side) • FTC = Medium closes (flow from the rear)

 

Mounting Orientations

Standard installation orientation: horizontal pipeline. Alternative installation orientations available on request.

 

FC = Spring closes  •  FO = Spring opens  •  FTO = Medium opens  •  FTC = Medium closes

Accessories

The control valves can be equipped with various accessories: Positioner, solenoid valve, supply pressure regulator, limit switch, volume booster/booster and other attachments.

 

Mounting of accessories (attachments) to pneumatic rotary actuators is performed according to two standardized mounting methods:

VDI/VDE 3845-1 (EN 15714-3)

Mounting of the accessories with air connections - Piping

 

Direct attachment according to VDI/VDE 3847-2 (IPM attachment kit)

Modular design with integrated air ducting and a direct air connection, without additional piping. Customer-oriented solution.