Electric actuator for modulating control and on/off valves

• operating by 3-term-step controllers or analogue signals 0/4..20 mA, 0..10 V DC or field bus
• separate force switch and limit switch for both directions
• protection rating IP 65
• valve position indicator
• manual handwheel
• optional accessories available
• self locking and stall-proof stop-motor

Additional equipment for actuator types ST 5112, ST 5113, ST 5114, ST 5106

Additional equipment for actuator types ST 6121, ST 6122

Pneumatic actuators for control and on/off valves

• Reversible direction of action
• Stroke max. 30 mm / max. 50 mm
• Max. air pressure 6 barg
• actuating force max. 9 kN / max. 18 kN (ST 6121 / ST 6122)
• approved by German Technical Inspectorate (TÜV) as an actuator for water and steam with safety function in heating systems

Series HV 6291 / PV 6291

• Nominal diameter DN 20...65
• nominal pressure PN 40
• maintenance free spindle packing
• clear flow through valve
• protection of spindle packing by back sealing
• easy replacement of cone

Series MV 5291

• Nominal diameter DN 15...25
• nominal pressure PN 40
• Two-way design with / without sample valve
• Hardened cone and seat for low wear operation
• body material made of GS-C 25
• Parabolic cone with linerar characteristic for exact dosing of blowdown flowrate

Series MV 5211

• Nominal diameter DN 15...50
• Nominal pressure PN 16...160
• Restitant materials for cone assembly
• Optimum control by adjusted cone assemblies
• Body material made of GS-C 25, GS 17, CrMo 55, stainless steel

Series MV 5270 / PV 6270, MV 5200/PV 6200, MV 5300/PV 6300, MV 5400/PV 6400

• Nominal diameter DN 20...300
• Three-way design
• Three-way design with short B-flange
• Spindle packing with chevron rings or long life torsion safe chambered bellows seal
• Easy to change actuator orientation for operation and cabling access
• Optimum control by adjusted cone assemblies
• Various cone designs
• ANSI - Control valves in 3-way design

Series MV 52-/5341 / PV 62-/6341

• Nominal width DN 50 ... 150
• Nominal pressure PN 16 ... 40
• Three-way design
• Kvs value adjustable in gate B
• Cone can be rotated 80°
• Vacuum-resistant on circulation side
• Circulation cone assy adapted for cavitation
• Valve housing made from GJS-400-18-LT, GP-240 GH, 1.4408

Motorized control valves for throttling, mixing and diverting of liquids and gases

• Two-way and three-way design
• Optimum control by adjusted cone assemblies
• Various cone designs
• Body material made of GG 25, GGG 40.3, GS-C 25, 1.4408
• ANSI - Control valves in 2-way design, Material A216 WCB 1“,1½ “, 2 “, 2 ½ “, 3“, 4“, 6“ , Class 150 and class 300 for Electric and pneumatic actuators

Motorized control valves for throttling, mixing and diverting of liquids and gases

• Two-way and three-way design
• Optimum control by adjusted cone assemblies
• Various cone designs
• Body material made of GG 25, GGG 40.3, GS-C 25, 1.4408

Series MV 5291 / MV 5391

• boiler-feed pump securely protected for falling below the minimum flow rate
• adjustable recirculation flow rate
• perforated cone for feed-water control
• for boiler steam ratings 5...50 t/h
• nominal size DN 25..DN 50, DN 80
• nominal pressure PN 40

Series MDK 5351/5451 – PDK 6351 – PDK 6451

• Selectable control characteristics
• Precise steam temperature control
• Turndown 30:1
• Optimum atomization as of ∆P 5 bar
• Tight shut-off.
• Large selection of different Kvs values with special nozzle combination

Series ST 6150

• approved by German Technical Inspectorate (TÜV) as an actuator for water and steam with safety function in heating systems
• closes at power failure or hazard
• closes smoothly even at large differential pressures
• adjustable closing time for ST 6152
• automatic return to closed loop control possible

Series MV 5311, MV 5411 / PV 6311, PV 6411

• Nominal diameter DN 100...400 NPS 4"...6"
• Nominal pressure PN 16 ... 160, #150...#300
• Two-Way
• Valve body materials JS-1025 (GJS-400-18LT), 1.0619 (GP-240-GH), 1.4408 (GX-5CrNiMo 19-11-2-), 1.7357 (G17CrMo5-5), A 216 WCB

Series MV 5351 / MV 5451 / PV 6351 / PV 6451

• Steam pressure reduction and cooling in one unit
• Low-noise perforated cone
• Water injection from below
• Wide control range
• Optimized control characteristic with adapted trim for steam and water
• Body material of GP240-GH or G17 CrMo55

Electronic 3-term step-controllers with PI-control

• Drive for electric actuators
• Set point selection by manual controller or programme tuner
• Function points for limit monitor and measuring transducer
• Disturbance variables and auxiliary two element control
• Manual and automatic operation

Digital controller with PID control RE3x52 free configurable as:

• 3-term-step-controller for driving electric actuators e.g.RTK actuators ST 5100 seriesor
• Continuous controller for driving pneumatic actuators with positioner e.g.: RTK SR 6136 , SR 6137 series

Electronic switchgear for 2-point control including 2 limit contacts

• 3 voltage-free change over contacts
• Control contact with adjustableon/off switch points
• 2 random adjustable limit contactsbetween 4 and 20 mA
• LED-indication for the input signal

Electronic switchgear

• DIN rail installation
• 2 separate channels
• 1 change-over contact per channel
• Delay adjustable
• LED switching display
• Current and voltage input

Series NI 1341 / 1342

• Linear measuring range 150 - 4000 mm
• Wear-resistant, inductive tracing (differential transformator)
• powered loop 4 – 20 mA
• trend display per 10% steps
• No connection between displacer and electronic

Series NG 1534

• Wide input range 85-264 VAC
• Output short-circuit-proof / Over voltage protection
• Fulfill norms: IEC/EN60950, EN50178, UL/cUL60950, UL508C
• clamp rail assembly
• DIN Clamp

Series NG 1534

• Wide input range 85-264 VAC
• Output short-circuit-proof / Over voltage protection
• Fulfill norms: IEC/EN60950, EN50178, UL/cUL60950, UL508C
• clamp rail assembly
• DIN Clamp

Electronic pressure gauge station for use in refrigeration and heating assemblies for measuring pressure in system operating with gases and liquids

Series DR 1226

• Piezoresistive
• Measuring range up to 60 barg
• Output 4...20 mA
• Power supply 24 V DC
• with pressure gauge
• Two-wire system

Resistance thermometer for precise temperature measurement and control

Series WT 1000

• Resistor elements in accordance with DIN 43760 IEC 571
• Measuring resistor PT 100
• Fastest response time
• Easy to install
• Can be replaced without calibration